Inks-and-printing-media-integral-type pack, printing liquid and sheets container, sheet supplying device, and printing apparatus comprising the same

Information

  • Patent Grant
  • 6793335
  • Patent Number
    6,793,335
  • Date Filed
    Tuesday, August 13, 2002
    22 years ago
  • Date Issued
    Tuesday, September 21, 2004
    20 years ago
Abstract
A pack integrally housing inks and printing media has an ink housing section 211 arranged so as to overlap part of a printing media housing section 210. The ink housing section 211 is configured to rotationally move around a rotational moving shaft 212e so as to be opened and closed relative to the printing media housing section 210. On the other hand, the printing media housing section 210 has an opening 215 formed in a lower part thereof and in which part of housed printing media appears, thereby enabling the pack to come into contact with a sheet feeding roller of the printer when the pack is installed in a printer. Additionally, while not installed in the printer, the pack is covered with the opening and closing ink housing section 211, thereby enabling the printing media to be protected from dusts or the like.
Description




This application is based on Patent Application Nos. 2000-26109 filed Feb. 3, 2000, 2000-26112 filed Feb. 3, 2000, 2000-26115 filed Feb. 3, 2000, and 2000-26117 filed Feb. 3, 2000, in Japan, the content of which is incorporated hereinto by reference.




BACKGROUND OF THE INVENTION




Field of the Invention




The present invention relates to an inks-and-printing-media-integral-type pack, a printing liquids and sheets container for accommodating sheets and printing liquids, a sheet supplying device for sequentially supplying sheets from the printing liquids and sheets container, and a printing apparatus comprising the same.




The ink jet printing system is carried out by causing fine droplets of inks to fly and adhere to a printing medium such as paper based on various operational principles, to print images, characters, or the like, thereby enabling printing with low noise at a high speed. The ink jet printing system has advantages such as facilitation of multicolor printing and is characterized by a high degree of freedom for recordable patterns, elimination of the necessity of development or fixation, and others. Thus, printing apparatuses based on this system method have been rapidly spread in various fields including that of data processing to accommodate various images and print media.




In addition, images formed by means of the multicolor ink jet printing system can easily stand comparison with multicolor printing based on the plate making system or photographic printing based on the color photographing system. The multicolor ink jet printing system enables images to be produced more inexpensively than normal multicolor printing or photographic printing if a small number of copies are particularly to be printed and is thus widely used in the field of full-color image printing.




To accommodate wider applications of the ink jet printing system and enable the recent improvement of printing characteristics such as an increased printing speed, an improved definition, and full color printing, efforts are being made to improve the printing apparatus and method. Characteristics required to achieve wider applications of the ink jet printing system and improve the printing characteristics include, for example, a high density of printed ink dots, bright and clear color tones, fast ink absorption, prevention of outflow or bleeding of inks despite overlapping ink dots, and spread of ink dots with appropriate bleeding.




It is known that these characteristics are realized not only by the printing apparatus and method but also by improving inks or printing media used for printing.




For example, it is known that a coated paper is used as a printing medium due to ink absorptivity and fixability achieved thereby. The coated paper comprises, for example, a silicon pigment such as silica, or an absorbing polymer including a resin such as colloidal silica, polyvinyl pyrrolidone, polyvinyl alcohol, polyethylene oxide-isocyanate crosslinked material, or an acrylic polymer having a carboxyl group, or an aluminum-based pigment such as alumina hydrated compound or aluminum oxide, which is each coated on a paper, a film, a cloth, or the like together with an aqueous binder or the like. On the other hand, inks have their permeability adjusted by means of a surface-active agent or the like contained therein.




To accommodate the improvement of the printing characteristics, however, an optimal combination of printing media and inks which can realize these characteristics is more preferably selected by individually selecting printing media or inks depending on each of the characteristics. This is because the inks and the printing media show each of the characteristics through their mutual relationship.




In this case, to specifically realize the optical combination of the printing media and the inks in an inkjet printing apparatus, configurations and operations are required which replace or install the printing media or the inks depending on a combination of printing media and inks. Additionally, an operation is required for setting printing conditions on, for example, a host computer; for example, a printing mode must be set depending on such a combination. That is, it is cumbersome to carry out the above operations or setting operations each time the combination is switched. It is also difficult for a user to obtain the optimal combination.




In connection with this, for example, Japanese Patent Application Laid-Open No. Heisei 11-254700 proposes a media cartridge removably mounted in a printing apparatus and acting as a portable container comprising a cassette section in which sheets are loaded as printing media and a combination of any ink tank or a corresponding waste ink tank for accommodating a waste ink, the cassette section and the combination being integrated together. The printing apparatus then recognizes the media cartridge, which can be arbitrarily installed therein and removed therefrom, to automatically set a printing mode set depending on the printing media and the ink so that appropriate printing control can be provided depending on the combination of the printing media and the ink, using easy operations.




In a printing apparatus in which such a media cartridge is installed, a sheet supplying device provided in the printing apparatus main body discharges in turn each sheet such as paper or a textile outward from the media cartridge toward a position under an ink jet printing head for executing a printing operation.




The sheet supplying device includes a roller that comes into contact with a surface of the sheet at a predetermined pressure to transmit the sheet based on a friction force applied between the sheet and the roller. An outer peripheral portion of the roller is formed of a material such as natural rubber, silicon rubber, or artificial leather, for example, which has a relatively large friction coefficient and a wear resistance.




(1) Although, however, the above publication describes the media cartridge comprising the cassette for housing printing media and the ink tanks, the cassette and the ink tanks being integrated together, it describes no specific configuration that takes into account the size reduction of the apparatus or the handling and application of the cartridge in configuring a printing apparatus employing the cartridge.




It neither takes the materials or compositions of both printing media and inks into consideration nor suggests combinations that can achieve the above described desired printing characteristics based on such materials or compositions. That is, in the above publication, if for a paper cartridge, paper is set as printing media, corresponding inks are set to comprise a process liquid and black, yellow, magenta, and cyan inks. On the other hand, if coat paper, glossy paper, or OHP sheets are set as printing media, the corresponding inks are set to comprise the above inks excluding the process liquid. These settings take into account the fact that the above coat paper or the like having an ink receiving layer coated thereon has reduced image quality if the process liquid, which insolubilizes the inks, is used. Further, the above publication describes a setting for dark black, light black, dark yellow, light yellow, dark magenta, light magenta, dark cyan, and light cyan provided when a photographic-image-quality mode is set.




Thus, the above publication discloses the integral cartridge comprising a combination of inks selected, depending on the printing media or printing mode, from several types of inks that are easily distinguished from one another by a user. On the other hand, due to, for example, dye affinity, appropriate compositions of inks vary depending on the material or composition of printing media though the latter all appear the same to the user; thus, optimal combinations exist in this sense. In this case, it is almost impossible for the user to select such combinations.




Another problem results from the fact that many known ink jet printing apparatuses have more or less specified printing characteristics. Thus, in this case, it is relatively difficult to meet the above described requirements for the various printing characteristics.




For example, with respect to the characteristics of the printing head, the life in itself which serve to determine the printing characteristics.




If the printing head is very frequently used, its durability must be increased. Similarly, the required characteristic of the inks includes their easy removal from the nozzles by means of a recovery operation or the like even in a case where recording is not carried out for a somewhat long time or the unlikelihood of variations in their compositions or colors. Since the characteristics of the ink jet recording apparatus is restricted by the above factors, an attempt to provide an ink jet printing apparatus with all the characteristics tends to result in the increased size or costs of the apparatus. Thus, ink jet printer makers or the like manufacture and sell printers that have their characteristics adapted, for example, to users who very frequently use them, to those who require high-grade and quality images, or to those who use them in a low or high-temperature environment, that is, the capabilities of these printers are limited to within certain ranges to meet such demands. Thus, if a user having an ink jet printer with a characteristic A is to execute printing with another characteristic B and when the user sets a special mode to adapt the printer to the characteristic B, this adaptation is limited. Consequently, to accommodate the characteristic B, the user has no other choice but to purchase another printer with that characteristics.




The present invention is adapted to solve these problems, and it is a first object thereof to provide an inks-and-printing-media-integral-type pack that enables printing with various characteristics to be accomplished using a simple configuration, that is configured taking the size of the apparatus into consideration, and that can be handled easily, as well as a printing apparatus comprising the inks-and-printing-media-integral-type pack.




(2) In addition, (a) for a form of an ink jet printer in which a media cartridge is installed in and removed from a recording apparatus, when the media cartridge is not installed for convenience and easier handling thereof, it is desirable that printing be executed on those other than the sheets housed in the media cartridge.




(b) the media cartridge desirably internally has a closed space in order to prevent sheets housed therein from being modified, and




(c) various sheets accommodated in the media cartridge may have different degrees of rigidity but it is difficult to appropriately change, depending on the rigidity of the sheet, a separating means operating in the sheet supplying device to reliably sequentially separate sheets one by one, so that the separating means is fixed to a single type of sheets. Consequently, there is a limit to the function of reliably separating various sheets one by one for sheet-by-sheet feeding.




In view of these points, it is a second object of the present invention to provide a printing liquids and sheets container for accommodating sheets and printing liquids, a sheet supplying device for sequentially supplying the sheets from the printing liquids and sheets container, and a printing apparatus comprising the same, wherein they can be conveniently and easily operated and enable sheets to be optimally and stably separated one by one depending on the rigidity of various sheets.




(3) Furthermore, the surfaces of various sheets accommodated in the media cartridge have different friction characteristics and it is difficult to appropriately change the type of a roller of the sheet supplying device depending on the friction characteristic of the sheet surface, so that an outer peripheral portion of the roller is formed of a single fixed type of material. Consequently, the roller may not optimally and stably supply the sheets depending on the characteristics of the surfaces of the various sheets.




In addition, the roller is made of a material having a high wear resistance but has a predetermined lifetime. Thus, if the lifetime is over, it is necessary that the roller can be easily replaced with a new one.




In view of these points, it is a third object of the present invention to provide a printing liquids and sheets container, a sheet supplying device, and a printing apparatus comprising the same which enable sheets to be optimally and stably supplied depending on the characteristics of the surfaces of the various sheets and which also enable the roller to be easily replaced with a new one.




(4) The only information held by the media cartridge disclosed in the above publication is ID (identification data) data, which are required to allow the cartridge to be recognized by the printing apparatus. Thus, if a new combination of inks and printing media is developed after the printing apparatus has been put on the market, then printing cannot be controlled using printing control parameters optimal for the combination unless programs in the printing apparatus are changed. Consequently, for example, makers cannot conventionally sell new media cartridges comprising such a new combination of inks and printing media.




Additionally, the printing apparatus cannot determine how many printing media remain in the media cartridge, so that the user can neither recognize the number of remaining printing media. This is a disadvantage of the user interface.




The present invention is adapted to solve the above problems, and it is a fourth object of the present invention to provide an inks-and-printing media-integral-type pack wherein various effective information for a printing apparatus or the like as required as well as and a printing apparatus comprising the pack.




SUMMARY OF THE INVENTION




To attain the above described first object, the present invention provides an integral-type pack housing inks and printing media, characterized in that the pack comprises a first portion and a second portion covering part of the first portion, the first and second portions each forming the pack, an opening and closing mechanism for opening and closing the second portion relative to the part of the first portion, and an opening portion formed in the part of the first section covered by the second portion and in which the printing media appears when the latter are housed in the first portion, and in that the if the opening and closing mechanism opens the second portion, a conveying force output from a conveying mechanism forming section for conveying the printing media acts directly or indirectly on the printing media through the opening portion.




Additionally, the present invention provides an integral-type pack housing inks and printing media, characterized in that the pack comprises a first portion and a second portion covering part of the first portion, the first and second portions each forming the pack, an opening and closing mechanism for opening and closing the second portion relative to the part of the first portion, and an opening portion formed in the part of the first section covered by the second portion and in which the printing media appears when the latter are housed in the first portion.




Preferably, the present invention is characterized in that the second portion can house inks.




In another embodiment, there is provided an ink jet printing apparatus that uses a printing head for ejecting an ink to eject the ink from the printing head to printing media for printing, the apparatus being characterized by comprising installation means for removably installing an integral-type pack comprising a first portion and a second portion covering part of the first portion, the first and second portions each forming the pack, an opening and closing mechanism for opening and closing the second portion relative to the part of the first portion, and an opening portion formed in the part of the first section covered by the second portion and in which the printing media appears when the latter are housed in the first portion, the installation means opening the second portion in response to the installation operation, and sheet feeding means that can at least partly contact with the printing media appearing in the opening portion in the first portion when the installation means installs the pack.




Preferably, the present invention is characterized in that the second portion can house inks.




According to the above configuration, the integral-type pack housing the inks and the printing media is divided into the first and second portions, the first portion houses the printing media, while the second portion houses the inks, and the second portion can be opened and closed relative to the part of the first portion.




Accordingly, the pack can be formed such that the second portion housing the inks overlap the part of the first portion housing the printing media.




In addition, since the pack has the opening portion in which the printing media housed in the part of the first portion appear, when the pack is installed in an ink jet printing apparatus, the second portion is opened to uncover the opening portion, while allowing the printing media from the opening portion to come in contact with the sheet feeding means.




Further, since the second portion can be opened and closed relative to the first portion, the pack can be configured such that the second portion can be opened in response to an operation of installing the pack.




To attain the above described second object, a printing liquids and sheets container according to the present invention is characterized in that the container comprises a case main body section removably disposed in a conveying mechanism forming section for conveying sheets to a printing section that performs a printing operation on printing surfaces of the sheets using printing liquids, a sheet accommodating section formed in the case main body section to accommodate the sheets, and a liquid accommodating section formed in the case main body section to accommodate the liquids, and in that the sheets taken out from the sheet accommodating section are discharged when a conveying force output from the conveying mechanism forming section acts on the sheets through a sheet discharging opening portion formed in the case main body section.




Additionally, a sheet supplying device according to the present invention comprises a portable container comprising an accommodation section removably disposed in a conveying mechanism forming section for conveying sheets to a printing section that performs a printing operation on printing surfaces of the sheets using printing liquids, the accommodation section housing the sheets and the liquids, and a sheet discharging opening portion through which the sheets are discharged from the accommodation section; a feeding roller disposed in the conveying mechanism forming section for taking out the sheets through the sheet discharging opening portion and discharging them; and drive means for driving the feeding roller if the portable container is installed in the conveying mechanism forming section.




Furthermore, a printing apparatus comprising a sheet supplying device according to the present invention comprises the above described sheet supplying device, a conveying mechanism forming section having a portable container removably disposed therein, for conveying a sheet discharged from the portable container to a printing section for performing a printing operation on printing surfaces of the sheets, and a control section for controlling operations of the sheet supplying device, the conveying mechanism forming section, and the printing section.




To attain the above described third embodiment, a printing liquids and sheets container according to the present invention comprises a portable container comprising an accommodation section removably disposed in a conveying mechanism forming section for conveying sheets to a printing section that performs a printing operation on printing surfaces of the sheets using printing liquids, the accommodation section housing the sheets and the liquids, and a sheet discharging opening portion through which the sheets are discharged from the accommodation section; and a feeding roller disposed in the conveying mechanism forming section depending on a type of sheets, for taking out and discharging the sheets through the sheet discharging opening portion.




A sheet supplying device according to the present invention comprises a portable container comprising an accommodation section removably disposed in a conveying mechanism forming section for conveying sheets to a printing section that performs a printing operation on printing surfaces of the sheets using printing liquids, the accommodation section housing the sheets and the liquids, and a sheet discharging opening portion through which the sheets are discharged from the accommodation section; a feeding roller disposed in the conveying mechanism forming section depending on a type of sheets, for taking out the sheets through the sheet discharging opening portion and discharging them; and drive means for driving the feeding roller if the portable container is installed in the conveying mechanism forming section. A printing apparatus comprising a sheet supplying device according to the present invention comprises the above described sheet supplying device, a conveying mechanism forming section having a portable container removably disposed therein, for conveying a sheet discharged from the portable container to a printing section for performing a printing operation on printing surfaces of the sheets, and a control section for controlling operations of the sheet supplying device, the conveying mechanism forming section, and the printing section.




To accomplish the above described fourth object, the present invention provides an inks-and-printing media-integral-type pack that can accommodate inks and printing media used in a printing apparatus, the pack being characterized by comprising storage means that enables information on the pack to be rewritten.




The present invention provides a printing apparatus that uses an inks-and-printing media-integral-type pack accommodating inks and printing media and that can record images using the inks and printing media supplied from the ink-and-printing media-integral-type pack, the printing apparatus being characterized in that as the above inks-and-printing media-integral-type pack, the inks-and-printing media-integral-type pack of the present invention can be used.




As is apparent from the above description, according to the present invention, the integral-type pack housing the inks and the printing media is divided into the first and second portions, the first portion houses the printing media, while the second portion houses the inks, and the second portion can be opened and closed relative to the part of the first portion. Accordingly, the pack can be formed such that the second portion housing the inks overlap the part of the first portion housing the printing media.




In addition, since the pack has the opening portion in which the printing media housed in the part of the first portion appear, when the pack is installed in an ink jet printing apparatus, the second portion is opened to uncover the opening portion, while allowing the printing media from the opening portion to come in contact with the sheet feeding means.




Further, since the second portion can be opened and closed relative to the first portion, the pack can be configured such that the second portion can be opened in response to an operation of installing the pack.




As a result, printing can be achieved with a simple configuration in such a manner as to exhibit various printing characteristics, and in particular, there are provided an inks-and-printing media-integral-type pack that takes the size of the apparatus into account and that can be handled easily, as well as an ink jet printing apparatus that allows this integral-type pack to be installed therein.




According to the present invention, sheets taken out from the sheet accommodating section are discharged by causing the conveying force output from the conveying mechanism forming section to act on the sheets through the sheet discharging opening portion formed in a case main body section. Consequently, the sheets are discharged while the printing liquids and sheets container remains installed. Therefore, the present invention provides improved convenience.




Additionally, the present invention further comprises a cover member disposed in the case main body section so as to be opened and closed relative to the sheet discharging opening portion, the cover member selectively covering the sheet discharging opening portion, and the cover member further comprises a guide member guided while engaging with an engagement section in response to an operation of installing the case main body section, the engagement section being separated from a portion of the conveying mechanism forming section in which a sheet accommodating section of the case main body section is arranged, so that the cover member is automatically shifted from a closed state to an open state relative to the sheet discharging opening portion by means of cooperation between the guide member and the engagement section, thereby accomplishing easier handling.




Further, sheet separating means is provided at an end portion of a sheet discharging section of the sheet accommodating section to sequentially discharge sheets discharged from the sheet accommodating section after separating them sheet by sheet, and a separating surface acting as the sheet separating means is set depending on rigidity of the sheets housed in the sheet accommodating section. Consequently, the sheets can be optimally and stably separated one by one depending on the rigidity of the various sheets.




According to the present invention, the feeding roller is disposed in the portable container depending on the type of the sheets, for discharging them through the opening portion. As a result, the sheets can be optimally and stably supplied depending on characteristics of surfaces of the various sheets and the roller can be easily replaced with a new one.




According to the present invention, the inks-and-printing media-integral-type pack comprises the storage means that enables information on the pack to be rewritten. Therefore, various information can be stored in the pack as required so as to be effectively used for the pack, the printing apparatus, or the like.




The above and other objects, effects, features and advantages of the present invention will become more apparent from the following description of embodiments thereof taken in conjunction with the accompanying drawings.











BRIEF DESCRIPTION OF THE DRAWINGS





FIG. 1

is a schematic perspective view showing the entire configuration of an ink jet printer to which an example of a sheet supplying device and a printing apparatus comprising the same according to the present invention is applied;





FIG. 2

is a sectional view showing an integral part of a sheet conveying section of the printer shown in

FIG. 1

;





FIG. 3

is a perspective view of an automatic sheet feeding device (ASF) in the example shown in

FIG. 1

;





FIG. 4

is a perspective view showing an integral part of a drive mechanism provided in the automatic sheet feeding device shown in

FIG. 3

;





FIG. 5

is a perspective view showing how paper is loaded in the automatic sheet feeding device shown in

FIG. 3

;





FIG. 6

is a perspective view showing how an ink media pack appears which is used for the example of the sheet supplying device and the printing apparatus comprising the same according to the present invention;





FIG. 7

is a perspective view showing a rear side of the ink media pack shown in

FIG. 6

;





FIG. 8

is a perspective view showing the internal configuration of an ink housing section of the ink media pack shown in

FIG. 6

;





FIG. 9

is a perspective view showing how the ink housing section of the ink media pack shown in

FIG. 6

is open relative to a printing media housing section;





FIG. 10

is a perspective view showing how the ink media pack shown in

FIG. 6

is installed in the automatic sheet feeding device shown in

FIG. 3

;





FIG. 11

is a side view of the state shown in

FIG. 10

;





FIG. 12

is a partial sectional view of the state shown in

FIG. 10

, as seen from a side surface side;





FIGS. 13A and 13B

are views useful in explaining the operation of a separating surface of the ink media pack shown in

FIG. 6

;





FIG. 14

is a perspective view showing how the ink housing section of a ink media pack that is another example of a printing liquids and sheets container according to the present invention is open relative to the printing media housing section;





FIG. 15

is a perspective view showing how the ink media pack shown in

FIG. 14

is installed in the automatic sheet feeding device shown in

FIG. 3

;





FIG. 16

is a partial sectional view of the state shown in

FIG. 10

, as seen from a side surface side;





FIG. 17

is a block diagram schematically showing the entire configuration of a printing system provided in the ink jet printer shown in

FIG. 1

;





FIG. 18

is a flow chart useful in explaining a program executed if the control section shown in

FIG. 17

comprises, for example, a microcomputer;




FIG.


19


A and

FIG. 19B

are flow charts useful in explaining a program executed if the control section shown in

FIG. 17

comprises, for example, a microcomputer;





FIG. 20

is a flow chart useful in explaining a program executed if the control section shown in

FIG. 17

comprises, for example, a microcomputer;





FIG. 21

is a flow chart useful in explaining a program executed if the control section shown in

FIG. 17

comprises, for example, a microcomputer;





FIG. 22

is a vertical cross sectional side view showing a sub-tank, a printing head, and an ink air supplying mechanism in an ink replacing system of the above printer and showing how these components operate during a printing operation;





FIG. 23

is a vertical cross sectional side view showing the sub-tank, printing head, and ink air supplying mechanism in the ink replacing system of the above printer and showing how these components operate when the sub-tank has its pressure reduced;





FIG. 24

is a vertical cross sectional side view showing the sub-tank, printing head, and ink air supplying mechanism in the ink replacing system of the above printer and showing how these components operate when air is introduced;





FIG. 25

is a vertical cross sectional side view showing a sub-tank, a printing head, and an ink air supplying mechanism in an ink replacing system of the above printer and showing how these components operate during an ink air discharging operation;





FIG. 26

is a vertical cross sectional side view showing the sub-tank, printing head, and ink air supplying mechanism in the ink replacing system of the above printer and showing how these components operate when the subtank has its pressure reduced again;





FIG. 27

is a vertical cross sectional side view showing the sub-tank, printing head, and ink air supplying mechanism in the ink replacing system of the above printer and showing how these components operate when an ink is introduced; and





FIG. 28

is an explanatory top view showing an ink introducing hole or the like in the sub-tank.











DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS




Embodiments of the present invention will be described below in detail with reference to the drawings.





FIG. 1

is a schematic perspective view showing an ink jet printer that is one embodiment of a printing apparatus comprising an example of a sheet supplying device according to the present invention.

FIG. 2

is a sectional view of an integral part of the printer shown in

FIG. 1

, principally showing a sheet feeding mechanism from a side of the printer.




As shown in

FIG. 1

, an ink jet printer according to this embodiment can use a pack


20


(hereafter also referred to as an “ink media pack”) comprising an ink housing section and a printing media housing section integrated therewith for housing printing media such as paper, the pack being removably installed in the printer. That is, the ink media pack


20


is removably installed in an automatic sheet feeding device (hereafter also simply referred to as an “ASF”)


1


installed in the printer main body. When the pack is installed, its printing media housing section


210


lie along the position of the ASF


1


, while an ink housing section


211


is separated from the printing media housing section


210


in response to the installation operation as described later and maintains a horizontal position. Printing media housed in the ink media pack


20


are those selected in connection with a small pore diameter of an ink receiving layer or textiles used for textile printing as described above, and are used for relatively special applications. Correspondingly, inks housed in the ink media pack


20


can appropriately dye fine pores or fibrous materials constituting the textiles. In this manner, the ink media pack


20


is used to appropriately combine printing media with inks. To print an image on an paper, paper inks (inks for use on a paper) housed in the printer main body are used for a paper installed in the ASF


1


.





FIG. 2

shows how the paper


4


is installed in the ASF


1


in the above case, wherein the paper


4


is directly installed in the ASF


1


with the ink media pack


20


removed from the printer. Additionally, the inks are housed in a paper ink refilling unit


30


previously installed in the printer main body and arranged in parallel with the ink media pack


20


as installed as shown in

FIG. 1

, and from which inks for paper are supplied.




A carriage


2


is provided so as to be movable along a guide shaft


3


(see

FIG. 2

) provided in such a fashion substantially traversing the printer main body. The carriage


2


has four printing heads (not shown) for ejecting inks, which are mounted thereunder depending on the types of inks that can be simultaneously supplied. The printing heads can thus execute scanning by moving in a sheet width direction of printing media conveyed in a printing area


8


(see FIG.


2


), while ejecting inks depending on printing information.




The carriage


2


of this embodiment has ink supply ports


2


A at its top as shown in FIG.


1


. That is, the ink supply ports


2


A comprise four such ports (


2


ABk,


2


AC,


2


AM,


2


AY) so as to correspond to the four printing heads, and are each in communication with a sub-tank (not shown) formed adjacent to the corresponding each printing head, via an ink and air input port, as described later. The carriage


2


moves with predetermined timings as described later to move the ink supply ports to a position corresponding to a supply section


21




a


of the ink media pack


20


or a supply section


30




a


of the paper ink refilling unit


30


. Additionally, at this corresponding position, an ink ejection port in the printing head also faces a cap


41


or a cap


40


corresponding to the paper


4


. Thus, operations of supplying the ink to the sub-tank for each printing head, replacing the ink, and recovering ejection can be performed as described later. For this ink supply and replacement, a pressure mechanism (not shown) provided in the printer main body and comprising a cam, a push-in pin, and others and which engages with a pressure section


221




a


of the ink media pack


20


or a pressure section


301




a


of the paper ink refilling unit


30


can perform predetermined operations to supply or replace the inks.




Specifically, for the ink supply and replacement as above, the carriage


2


moves to cause its ink supply port


2


A to reach a position corresponding to the supply section


21




a


or


30




a


, and a carriage elevating mechanism (not shown) with a cam rotates the entire carriage


2


using a guide shaft


3


(see

FIG. 2

) as a rotation axis. An ink leakage preventing member of the ink supply port


2


A is brought into tight contact with a joint section of the ink housing section of the ink media pack


20


or a joint section of the paper ink refilling unit


30


. Subsequently, the cap


41


or


40


elevates to come into abutment with the printing head or the like mounted under the carriage


2


, thereby enabling the ink supplying or replacing operation.




Still, for the ejection recovering process, of course the carriage elevating mechanism does not operate but the cap


41


or


40


only elevate to come into abutment with the printing head. In addition, the tight contact between the ink supply port


2


A and each of the above described joint sections can be canceled by performing an operation reverse to the above described one performed by the carriage elevating mechanism. Furthermore, this operation of a cam in the elevating mechanism is achieved by a driving force of a motor; driving control of the motor for elevating or lowering the carriage is performed and to move the carriage


2


, driving control of the motor is performed for allowing the cam to retreat to a position where it does not engage with the carriage


2


.




Additionally, for the ink supply and replacement as above, the pressure mechanism (not shown) provided in the printer main body and comprising the cam, the push-in pin, and others performs predetermined operations. The operation for the ink supply or replacement is accomplished when the push-in pin engages with a predetermined member of the pressure section


221




a


of the ink media pack


20


or of the pressure section


301




a


of the paper ink refilling unit


30


. Further, a recovery mechanism


42


is provided substantially under the caps


40


and


41


. The recovery mechanism


42


comprises a suction pump or the like used for the above described ink supplying and replacing operations and ejection recovering operation.




With the above configuration, for printing, first, a sheet-feeding roller unit


5


(see

FIG. 2

) provided in the ASF


1


supplies printing media directly from the ink media pack


20


or the ASF


1


to the printing area


8


. Then, as shown in

FIG. 2

, for each scanning by the printing head installed in the carriage


2


, the sheet-feeding roller


7


and the pressure roller


6


cooperate with each other in feeding a printing medium in a direction shown by an arrow A in the figure, by a predetermined amount for each feeding operation, so that images are sequentially printed on a printing surface of the printing medium, which is then discharged as shown by a chain double-dashed line in FIG.


1


.




As is apparent from the arrangement of each of the elements chiefly shown in

FIGS. 1 and 2

, the printing media housing section


210


and ink housing section of the ink media pack


20


has an arrangement relationship that is appropriate particularly for installation in a printer. That is, the ink housing section


211


is opened and closed relative to the printing media housing section


210


and is arranged so as to overlap the part of the printing media housing section. When installed, the ink housing section


211


can be partly located over the movement area of the carriage (the printing head).




This arrangement contributes to downsizing the printer. For example, if the ink media pack is configured such that the ink housing section is arranged at a side of the printing media housing section in parallel therewith, the dimension of the ink media pack in this lateral direction increases, thereby requiring the printer to be enlarged. In addition, if the ink media pack is configured such that the ink housing section is arranged in a fashion overlapping the rear side of the printing media housing section, the dimension of the printer in this thickness direction, thereby making it relatively difficult to provide a ink supply passage. Contrary to this, in this embodiment, the ink media pack is configured such that the ink housing section


211


can be opened and closed relative to the printing media housing section and can be partly located over the movement area of the carriage as described above, the size of the printer need not be increased as described above.




In addition, according to the above arrangement of this embodiment, the distance between the carriage


2


(printing head) and the ink housing section


211


can be reduced, thereby reducing the size of the ink supplying passage relative to the printing head and simplifying the configuration of the ink supplying passage.





FIG. 3

is a perspective view showing the detailed configuration of the ASF


1


.




As shown in this figure, the ASF


1


comprises a base


102


having a base left-hand plate


102




b


and a base right-hand plate


102




a


provided at opposite ends thereof and opposite to each other, a sheet feeding roller unit


5


disposed in a base


102


, pressure plates


103


each disposed in a corresponding one of two recesses


102




g


formed in the base


102


opposite to the sheet feeding roller unit


5


, a movable side guide


105


disposed so as to enable to slide on a flat portion of the base


102


, and other components.




An accommodation section of the base


102


is inclined from the printer main body through 30 to 60° to support paper


4


, if used, as shown in FIG.


5


. On the other hand, if the printing media


200


housed in the ink media pack are used, the accommodation section of the base


102


support the installed pack in itself, as shown in FIG.


10


.




The base


102


is fixed to the printer main body by supporting, on the printer main body, a fixed portion


108


provided at one end surface of each of the base left-hand plate


102




b


and the base right-hand plate


102




a


. The fixed portion


108


forms a periphery of an opening portion through which the printing medium


200


or paper


4


passes. Thus, a space surrounded by the base left-hand plate


102




b


, the base right-hand plate


102




a


, and the fixed portions


108


is open frontward and upward.




The base left-hand plate


102




b


and the base right-hand plate


102




a


have guide grooves


102




c


and


102




d


, respectively, formed in their inner side surfaces and with which guide bosees


218




b


of the ink media pack


20


, described later, are engaged. The guide grooves


102




c


and


102




d


, the upper end side of which is open, extend in parallel toward the fixed portions


108


along top surfaces of the base left-hand plate


102




b


and the base right-hand plate


102




a


, respectively, over a predetermined length. In addition, an introduction guide


102




e


for guiding a media case


212


of the ink media pack


20


is provided in a portion where the flat surface portion of the base


102


crosses the inner side surface of the base left-hand plate


102




b


and base right-hand plate


102




a


. Each introduction guide


102




e


has a stopper


102




f


on its lower end side for limiting the media case


212


to a predetermined position.




A position limiting member LM having a separating surface


107


is provided in such a manner as to be rotationaly moved below the flat surface portion of the base


102


. Opposite ends of the position limiting member LM are supported by the base left-hand plate


102




b


and the base right-hand plate


102




a


via a rotation axis


107




a


so as to be rotationally moved, as shown in FIG.


11


. The position limiting member LM is urged by a spring (not shown) in the direction shown by an arrow S in FIG.


3


. Thus, the position limiting member LM can maintain a predetermined position for supporting the above described paper


4


as shown in FIG.


5


.




The separating surface


107


provides a basic function of applying a predetermined resistance to a tip of paper


4


fed by the sheet feeding roller unit


5


when paper


4


has been directly mounted in the ASF


1


, as shown in

FIG. 5

, thereby restricting the tip of paper


4


to separate the sheets one by one. The separating surface


107


also provides a function of supporting lower ends of plural laminated sheets of paper


4


in such a manner that the ends are flush with one another.




On the other hand, when the ink media


20


pack is installed in the ASF


1


, the separating surface


107


is pressed by the lower end of the ink media pack


20


in connection with the installation operation as shown in FIG.


12


and is thus rotated against an urging force of the above mentioned spring to recede in a direction opposite to that shown by the arrow S.




A side guide


105


is provided so as to slide in a width direction of paper


4


installed on the flat surface portion of the base


102


, that is, in the direction shown by the arrow in

FIG. 3

so that when paper


4


is set in the ASF


1


, a width-wise position of paper


4


can be restricted depending on its size. That is, in setting paper


4


in the ASF


1


, the width direction of paper


4


can be restricted by using the base right-hand plate


102




a


as a referential plane to abut one side end of paper


4


on the base right-hand plate


102




a


, while abutting the side guide


105


on the other side end of paper


4


.




On the flat surface of the base


102


, the two recesses


102




g


, in each of which the pressure plate


103


is provided, are formed above the position limiting member LM and adjacent to each other and separated from each other by a predetermined distance, as shown in

FIGS. 3 and 12

.




The two pressure plates


103


are connected together by fixing a shaft portion of a pressure plate releasing lever


113


to a pair of notches


103




a


as shown in FIG.


4


. Additionally, arm portions provided on the shaft portion are connected to a pair of slits


103




b


formed near the notches


103




a


in the pressure plates


103


. The shaft portion has cam surface portions


113


CA integrally formed at opposite ends thereof in such a manner as to extend perpendicularly to an axis thereof.




Thus, the cam surface portions


113


CA and the shaft portion are fixed relative to the pressure plates


103


in a predetermined angular relationship.




At the same time, the cam surface portions


113


CA located at the both ends of the pressure releasing lever


113


are abutted, due to urging forces of pressure plate springs


114


, on pressure plate cams R


109




a


and R


109




b


provided in the sheet feeding roller unit


5


, described later. Additionally, inner portions of the cam surface portions


113


CA located at opposite ends of the shaft portion are movably supported by bearing portions Be formed on the base left-hand plate


102




b


and the base right-hand plate


102




a.






The pressure plate spring


114


is provided between an inside of each pressure plate


103


and a bottom portion of the corresponding recess


102




g


, as shown in

FIGS. 4 and 12

, to urge the pressure plate


103


toward the sheet feeding roller unit


5


. The pressure plates


103


and the pressure plate springs


114


are provided behind the corresponding pressure plates


103


at positions substantially corresponding to roller portions


104




a


of the sheet feeding roller unit


5


.




Thus, the pressure plates


103


each have its outer peripheral surface guided by a wall surface forming the recess


102




g


, so as to slide altogether perpendicularly to the flat surface portion of the base


102


.




Thus, if the pressure plate cams R


109




a


and L


109




b


are rotationally moved through a predetermined rotational angle to press the cam surface portions


113


CA located at the opposite ends of the pressure releasing lever


113


, the pressure plates


103


are pressed against the urging forces of the pressure plate springs


114


to recede until they and housed in the corresponding recesses


102




g


, as shown in FIG.


12


. When the pressure plate cams R


109




a


and L


109




b


are further rotationally moved after the rotational movement through the predetermined rotational angle, the top of each pressure plate


103


is projected from the recess


102




g


due to the urging force of the pressure plate spring


114


and come into abutment with paper


4


or the ink media pack


20


.

FIGS. 3 and 4

show that the pressure plates


103


have been fully pushed in the recesses


102




g.






Paper


4


or printing media


200


housed in the ink media pack


20


due to the urging forces of the pressure springs


114


are urged against the sheet feeding roller unit


5


. The pressure plates


103


located opposite the corresponding roller portions


104




a


of the sheet feeding roller unit


5


each have a separating pad


106


on its top surface, which is composed of a material such as an artificial leather which has a relatively large friction coefficient, in order to prevent overlapping feeding or the like which may occur when there are little paper


4


placed in that.




The sheet feeding roller unit


5


is an integral molding of plastics or the like which comprises the shaft portion


104


rotatably supported by the right-hand plate


102




a


and left-hand plate


102




b


integrally provided at the opposite ends of the plate


102


, and the two roller portions


104




a


fixed around the shaft portion


104


at a predetermined interval.




The opposite ends of the shaft portion


104


, extending in a direction substantially orthogonal to the sheet feeding direction shown by an arrow F in

FIG. 5

, are supported by the base left-hand plate


102




b


and the base right-hand plate


102




a


so as to be rotationally moved. The shaft portion


104


has the pressure plate cam L


109




b


provided at one end thereof and brought into sliding contact with the cam surface portion


113


CA, as shown in

FIGS. 4 and 5

. The pressure plate cam L


109




b


, as an eccentric cam, has a rotating center corresponding to a center of an axis of the shaft portion


104


of the sheet feeding roller unit


5


, described later, and the contour of the pressure plate cam L


109




b


is formed to be subjected to a maximum displacement at one end thereof which is decentered from the rotating center by a predetermined distance. Additionally, the shaft portion


104


has at the other end, a sheet feeding roller gear A


110


and the pressure plate cam R


109




a


installed outside it. The pressure plate cam L


109




a


has a rotating center corresponding to a center of the axis of the shaft portion


104


of the sheet feeding roller unit


5


, and the contour of the pressure plate cam L


109




a


is formed to be subjected, synchronously with the pressure plate cam L


109




b


, to a maximum displacement at one end thereof which is decentered from the rotating center by a predetermined distance. The pressure plate cams R


109




a


and L


109




b


are always in abutment with the cam surface portions


113


CA without leaving them, the cam surface portions


113


CA being urged by the urging forces of the above described pressure plate springs


114


.




The sheet feeding roller gear A


110


is meshed with a sheet feeding roller gear B


111


supported on an outer plane portion of the base right-hand plate


102




a


so as to be rotationally moved. The sheet feeding roller gear B


111


is meshed with a sheet feeding roller gear C


112


supported on the same plane so as to be rotationally moved. The sheet feeding roller gear C


112


is connected via a connecting shaft CS to a predetermined drive source provided in the apparatus main body.




Thus, as shown in

FIG. 3

, when a clockwise rotational moving force T is transmitted to the sheet feeding roller gear C


112


via the connecting shaft CS, the pressure plate cams R


109




a


and L


109




b


are rotationally moved in the direction shown by the arrow F via the sheet feeding roller gear B


111


together with the roller portion


104




a


and the shaft portion


104


.




In this case, the pressure cams R


109




a


and L


109




b


have their phases set relative to the rotational angle of the shaft portion


104


so that when paper


4


or the ink media pack


20


is set and when former-period rotations of the pressure plate cams R


109




a


and L


109




b


subject their contours to the maximum displacement, that is, the pressure plates


103


are fully pushed in the recesses


102




g


, the flat surface portions of the roller portions


104




a


, which constitute chords of their sectional shapes, are located opposite the corresponding pressure plates


103


, as shown in FIG.


3


. This forms a fixed space between the sheet feeding roller unit


5


and the pressure plates


103


(initial state) to enable paper


4


or the ink media pack


20


to be set.




Additionally, the roller portion


104




a


has a roller rubber attached to its outer peripheral surface constituting its circumferential portion, to generate a larger conveying force when the printing media including paper


4


are fed. Specifically, the outer peripheral surface of the roller portion


104




a


has a generally D-shaped (or half-moon-shaped) cross section. This enables the stacked printing media to be appropriately fed sheet by sheet. In addition, the two roller portions


104




a


are located on the shaft portion


104


about 40 and 170 mm away from a referential position for paper


4


on the base right-hand plate


102




a


(on the inner surface of the base right-hand plate


102




a


).




Accordingly, if printing media such as those of an A4 size which are relatively wide are used, the two roller


104




a


are used for sheet feeding. If, for example, those which have a width corresponding to postcards or the like are used, one of the roller portions


104




a


which is closer to the base right-hand plate


102




a


is used for a sheet feeding operation.




In addition, the sheet feeding roller unit


5


has a roller sensor (not shown) to detect rotational phases of the roller portions


104




a


of the sheet feeding roller unit


5


as well as slide positions of the pressure plates


103


, moving synchronously with the sheet feeding roller unit


5


by matching their phases with that of the sheet feeding roller unit


5


, thereby determining control timings for a sheet feeding sequence for paper


4


and the printing media


200


in the ink media pack


20


.




For example, as shown in

FIG. 5

, while paper


4


is being fed, predetermined latter-period rotations of the above mentioned pressure plate cams R


109




a


and L


109




b


cause the pressure plates


103


to approach the sheet feeding roller unit


5


due to the urging forces of the pressure plate springs


114


.




This causes an arc-shaped portions of the roller portions


104




a


of the sheet feeding roller unit


5


to come in abutment with the top surface of the top sheet of paper


4


.




As the arc-shaped portions of the roller portions


104




a


are further rotated, frictional force is applied to paper


4


in the sheet feeding direction (the direction shown by the arrow F in the figure). At this time, the second sheet of paper


4


from the top and the subsequent sheets undergo a relatively weak frictional force generated between the sheets, paper


4


is hindered from moving in the sheet feeding direction due to resistance from the separating surface


107


. Thus, only the top sheet of paper


4


rides on the separating surface


107


and is thus separated from the other sheets; it is then fed beyond the separating surface


107


as shown by a chain double-dashed line.




Subsequently, the separated and fed paper


4


is fed to printing paper feeding section. The sheet feeding roller


5


is rotated until all paper


4


is fed to the printing media feeding section, and the pressure plates


103


then enters the above described initial state relative to the sheet feeding roller unit


5


. In this case, the rotational driving forces of the roller portions


104




a


of the sheet feeding roller unit


5


which are applied to paper


4


are blocked and this state is maintained.




After the paper placed on the pressure plate


103


of the ASF


1


or the paper


4


composed of a synthetic resin or the like has thus been fed by the sheet feeding roller unit


5


, the sheet feeding roller


7


(see

FIG. 2

) conveys the paper


4


to the printing position opposite to the printing head in order to print.




Next, the configuration of the ink media pack


20


removably installed in the ASF


1


, described above, will be described.





FIGS. 6

to


9


show the configuration of the ink media pack


20


.

FIG. 6

is a perspective view of the ink media pack


20


as seen from its front side,

FIG. 7

is a perspective view thereof as seen from its rear side,

FIG. 8

is a perspective view showing the interior of the ink housing section of the ink media pack


20


, and

FIG. 9

is a perspective view showing how the ink housing section on the front side of the ink media pack


20


is separated from a main body side thereof so as to be opened.




The ink media pack


20


houses an optimal combination of printing media and inks corresponding to various printing characteristics and enables the printing mode to be automatically set by means of its installation, as described previously. That is, this embodiment prevents a user from mistakenly determining a combination of printing media and inks in principle if optimal types of inks in terms of the printing characteristics vary with the material or composition of printing media even if the latter appear the same to the user, and also enables a printing mode suitable for the combination of installed printing media and inks to be automatically executed when the user installs the selected ink media pack in the printer.




For a printing characteristic for images contained a high density of color, for example, if the printing media depend on the permeability of the inks, then the optimal types of inks vary correspondingly, so that it is generally difficult for the user to select the optimal inks for the printing media. In addition, if textiles are used as the printing media, the optimal inks depend on the type of fibers constituting the textiles vary in respect to dyeing properties, even if the latter appear the same because the different fibers have different dyeing properties. The combination of the printing media and inks in the ink media pack


20


may be, for example, inks containing reactive dyes and textiles that are dyed by means of covalent binding with the reactive dyes. In addition, textiles that are dyed by means of hydrogen or ionic bonding are combined with inks containing acid or direct dyes.




In

FIGS. 6

,


7


, and


8


, the ink media pack


20


generally comprises the printing media housing section


210


and the ink housing section


211


, which house printing media and inks of an optimal combination as described above, respectively. A plurality of such ink media packs


20


are provided for different combinations so that one of them can be installed in the ASF


1


of the printer depending on a selection by the user.




The ink housing section


211


is structured to be entirely enclosed by an ink case


218


. The ink housing section


211


internally has ink chambers


218




a


each corresponding to one of a plurality of inks housed therein, the chambers each having an ink tube that stores an ink, as will be seen in FIG.


8


. Additionally, the ink housing section


211


, acting as a lid member, is provided so as to be opened and closed relative to the printing media housing section


210


(see FIG.


9


). That is, the ink case


218


, acting as a lid member, is supported for free rotational movement by means of rotational movement axis


212




e


provided on opposite sides of the printing media housing section


210


, so that when the ink media pack


20


is installed in the printer, the ink case


20


moves rotationally in response to the installation operation to occupy a predetermined position (see FIG.


1


).




The ink case


218


has the pressure section


221




a


(see

FIG. 6

) in a corner portion in a rectangular top surface thereof, and a joint section


220


(see

FIG. 9

) in an opposite bottom surface. These sections are used for ink replacement and supply as described later.




On the other hand, the printing media housing section


210


has printing media


200


housed therein and substantially entirely covered by a media case


212


forming a front surface side of the housing section


210


and a rear cover


213


on a rear side thereof, as shown in

FIGS. 6 and 7

. The printing media housing section


210


has an opening portion formed in a portion of a lower part thereof. That is, the printing media housing section


210


has a front opening


215


formed in a lower portion of the front side as shown in FIG.


9


. This chiefly enables the housed printing media


200


to be fed by causing the roller section


104




a


(see

FIG. 3

) of the sheet feeding roller unit


5


to contact with a surface of the printing media


200


via the front opening


215


as shown by a chain double-dashed line in

FIG. 12

, when the ink media pack


20


is installed in the ASF


1


.




In this manner, the printing media housing section


210


requires the opening through which the roller of the sheet feeding roller unit acting as the sheet feeding means come into contact with the printing media, but such an opening may allow dusts to enter the printing media housing section while the ink media pack


20


is not used and is removed from the printer.




In contrast, in this embodiment, when the ink media pack


20


is removed from the printer, the ink housing section


211


can cover this opening as shown in FIG.


4


and other figures, thereby obtaining the printing media feeding opening, while preventing dusts or the like from entering the printing media housing section to adhere to the printing media.




On the other hand, the printing media housing section


210


has, as shown in

FIG. 7

, a rear opening


216


formed in a rear side thereof adjacent to the rear cover


213


and covered by a protective sheet


214


, described later. The rear opening


216


chiefly enables the pressure plate


103


of the ASF


1


and the printing media


200


to be engaged with each other via the protective sheet


214


when the ink media pack


20


is installed in the ASF


1


.




The plurality of printing media


200


stacked and housed in the printing media housing section


210


are housed via the protective sheet


214


on the rear side. At least one side (preferably a longer side) of the protective sheet


214


is fixed to the interior of the printing media housing section


210


, while a portion of the protective sheet


214


which corresponds to the rear opening


216


can be moved toward the inside of the ink housing section


211


so that the rear opening


216


shifts from a closed state to a substantially open state.




Thus, even if the housed printing media


200


are sequentially discharged, the top one of the remaining printing media


200


is selectively pressed against the ink housing section


211


(sheet feeding roller unit


5


) via the protective sheet


214


by means of the pressure plates


103


.




The protective sheet


214


is formed of the same material as the housed printing media so as to have an appropriate friction coefficient for its relationship with the printing media


200


. This restrains a phenomenon where the bottom one of the stacked and housed printing media


200


, that is, the one that is in direct contact with the protective sheet


104


cannot be appropriately fed or a phenomenon where one of the printing media


200


is prematurely fed together with another stacked thereon (overlapping feeding).




The friction coefficient RF of the outer peripheral portion of the roller portion


104




a


, the friction coefficient PF of the surface (contact surface) of the protective sheet


214


, and the friction coefficient SF of the surface of the printing media


200


are each set, for example, based on mutual relationships between these members. For these members, the friction coefficient RF of the outer peripheral portion of the roller portion


104




a


is set to be largest, the friction coefficient SF of the surface of the printing media


200


is set be smallest, and the friction coefficient PF of the surface (contact surface) of the protective sheet


214


is set to be between the friction coefficient RF of the outer peripheral portion of the roller portion


104




a


and the friction coefficient SF of the surface of the printing media


200


(SF≦PF<RF).




In this case, for example, the friction coefficient PF of the protective sheet


214


and the friction coefficient SF of the surface of the printing media


200


have the same value.




Additionally, the rear opening


124


has a lock


212




b


integrally formed in a substantially central portion of a periphery thereof. The protective sheet


214


and the lock


212




b


can preclude the housed printing media


200


from slipping out toward the rear side, while preventing dusts or the like from entering the housing section through the rear opening


216


.




Further, the printing media housing section


210


has a connector


400


provided in part of the lower end surface thereof and which is electrically connected to a connector


310


(see

FIGS. 3 and 10

) provided an introducing open end of the ASF


1


. This enables the printer main body to read out various information stored in a predetermined memory of the ink media pack


20


. The connector


40


is mounted on a printer circuit board


401


(see FIG.


7


). In addition, the media case


212


has a lock hole


210




a


, described later, formed in a top surface thereof.




Further, as shown in

FIG. 12

, a pack separating surface


212




a


is formed in one of the sides of the printing media housing section


210


which define the front opening


215


thereof. In feeding the printing media


200


housed in the ink media pack


20


, the pack separating surface


212




a


separates the printing media


200


one by one as with paper


4


as described previously in FIG.


5


. Specifically, the pack separating surface


212




a


is formed as a plane on which the lower ends of those of the printing media


200


laminated and housed in the printing media housing section


210


which are near the top recorded medium are abutted during their feeding operation, and has an appropriate butting angle (abutting angle α) for the separation.




The abutting angle α, that is, the angle between the separating surface


212




a


and the inner surface of the peripheral portion of the front opening


215


on which the lower ends of the printing media


200


abut is set, for example, depending on the rigidity of the printing media


200


, as shown in

FIGS. 13A and 13B

.




For example, for printing media


200


A having a relatively high rigidity, the abutting angle α is set to be relatively large as shown in FIG.


13


A. Additionally, for printing media


200


B having a relatively low rigidity, the abutting angle α is set to be relatively small as shown in FIG.


13


B.




In this embodiment, the separating surface


107


shown in FIG.


3


and the above described separating surface


212




a


are used as a separating means. The ASF


1


using separating claws as the separating means, however, requires a method for allowing the separating claws of the ASF to recede when the pack is installed, and in this case, the printing media housing section may have another separating claw or a totally different separating means. The separating means is not limited to the above described separating surfaces for both the ASF


1


and the inks and printing media pack, but a combination of optimal separating means can be employed.




Furthermore, as shown in

FIG. 9

, arc-shaped butting ribs


212




d


abutted against the corresponding stoppers


102




f


are formed in peripheral portions of the front opening


215


which connect to opposite sidewall portions.




A plurality of rubber caps


222


, described later, are provided in a line and adjacent to one of the two butting ribs


212




d


. A guide rib


212




c


, described later, is provided outside each butting rib


212




d


along the corresponding sidewall portion.





FIG. 8

is a view showing the internal structure of the ink housing section


211


, wherein the ink case cover


219


(see

FIG. 9

) of the ink case


218


constituting the ink housing section


211


has been removed.




The ink case


218


has four ink chambers


218




a


formed inside depending on the colors of inks used for printing. The four ink chambers


218




a


store, for example, a yellow, cyan, magenta, and black inks. Of course, appropriate inks may be stored depending on the conditions of printing and the embodiment is not limited to the above inks. Each of the ink chambers


218




a


has an ink bag


218




d


arranged therein. The ink bag is formed of a flexible material and is partly bonded to a bottom surface of the ink chamber for fixation. The ink can be supplied from each of the ink bags


218




d


by connecting an ink supply tube


218




c


attached to one end of the ink bag


218




d


, to each corresponding joint valve


221


. The joint valve


221


is in communication with the joint section


220


, shown in

FIG. 9

, so that the carriage moves to dispose its ink supply port opposite to this joint section to be in a state of enabling the ink to be supplied to the printing head, as described previously in FIG.


1


.




As described above, when the ink media pack


20


of the configuration shown in

FIGS. 6

to


9


is not installed in the printer, the ink housing section


211


of the ink media pack


20


is closed relative to the printing media housing section


210


to allow the ink housing section


211


to function as a lid for the printing media housing section


210


. That is, the ink housing section


211


prevents the printing media


200


housed via the front opening


215


of the printing media housing section


210


from being exposed to air.




Furthermore, a plurality of rubber caps


222


are provided at a position adjacent to the front opening


215


of the printing media housing section


210


and corresponding to the joint section


220


of the ink housing section


211


. Thus, when the ink housing section


211


is closed relative to the printing media housing section


210


, the rubber caps


222


encloses the joint section


220


to prevent the ink from leaking from the ink bag in each ink chamber


218




a.






On the other hand, when the ink media pack


20


is installed in the ASF


1


of the printer, the ink housing section


211


is open relative to the printing media housing section


210


(see FIG.


10


). That is, the ink housing section


211


is supported for free rotational movement by means of the rotational movement axis


212




e


so as to be automatically opened relative to the printing media housing section


211


with installation operation, thereby enabling the ink to be supplied to the above described printing head.




Consequently, the operator can installed the ink media pack


20


in a predetermined position without the need to force the ink housing section


211


open; the operator can handle the ink media pack


20


easily during the installation.




Although in this embodiment, the inks optimally combined with the printing media are housed in the ink housing section, otherwise, washing inks may be housed therein to wash the printing head and the interior of an ink supply passage to the printing head when the ink is replaced. Additionally, if an ejection energy generating element for the printing head comprises an electrothermal converter and if the inks optimal for the printing media may scorch the electrothermal converter, scorch-removing liquids or kogation-removing liquids may be housed which removes kogation from the electrothermal converter.




Next, an operation of installing the ink media pack


20


in the ASF


1


will be described principally with reference to

FIGS. 10

to


12


.




The ink media pack


20


is configured so as to be installed in and removed from the ASF


1


of the ink jet printer, and configurations required for the installation and removal are provided in the ASF


1


and the ink media pack


20


.




In the ASF


1


shown in

FIG. 3

, the introduction guides


102




e


engage with the corresponding guide ribs


212




c


provided at the opposite ends of the printing media housing section of the ink media pack


20


when the latter is installed, thereby allowing the operation of installing the ink media pack


20


to be guided. That is, the guide ribs


212




c


of the ink media pack


20


guide the printing media housing section


210


into the ASF


1


. The guide ribs


212




c


engage with the corresponding introduction guides


102




e


and slide along them to enable the installation of the printing media housing section


210


to be guided. The guide ribs


212




c


continue sliding until the butting ribs


212




d


(see

FIGS. 10 and 12

) formed at the opposite side portions of the printing media housing section


210


butt against the stoppers


102




f


(see

FIGS. 10 and 12

) provided on the base right-hand plate


102




a


and the base left-hand plate


102




b


. This determines a position of the printing media housing section


210


relative to the base


102


for installation and arrangement.




When the above described printing media housing section


210


is installed, the connector


310


(see

FIG. 10

) for the printer provided in the ASF


1


and the connector


400


provided on the lower end surface of the printing media housing section


210


are connected together, thereby allowing the printer to recognize that the ink media pack


20


has been installed. In addition, after this installation, the ink media pack


20


can be fixed to the ASF


1


by rotating, as shown in

FIG. 10

, a lock lever


150


in the direction shown by the arrow, the lock lever


150


being provided on the left-hand plate


102




b


of the ASF


1


and supported for free rotational movement by means of a lever shaft


150




a


, so that a projection


150




b


of the lever


150


is inserted into a lock hole


210




a


formed in the ink media pack


210


. This fixation enables the above described connectors to be reliably connected together.




The input guide


102




e


is configured to leave a gap between itself and the uppermost sheet of paper


4


during maximum stacking so that when the paper


4


is directly mounted in the ASF


1


, an operation of loading or feeding the paper will not be obstructed. When the side guide


105


is moved to the leftmost position in

FIG. 5

, it is housed in a side guide housing section (not shown) provided on the base left-hand plate


102




b.






On the other hand, the operation of installing the ink housing section


211


of the ink media pack


20


is guided through the engagement between the guide grooves


102




d


formed in the base right- and left-hand plates


102




a


and


102




b


of the ASF


1


and guide bosses


218




b


provided on the opposite side portions of the ink case


218


of the ink housing section. That is, during the above described operation of installing the printing media housing section


210


, the two guide bosses


218




b


of the ink housing section


211


are engaged with the open ends of the two corresponding guide grooves


102




d


of the ASF


1


before sliding, as shown in FIG.


12


. Then, in response to the above described operation of inserting the printing media housing section


210


, the ink housing section


211


start to be opened as the guide bosses


218




b


are guided, and are automatically rotated around the rotation axis


212




e


. Once the insertion operation has been ended, the ink housing section


211


assumes a substantially horizontal determined position, shown in

FIGS. 1

,


11


, and


12


, to complete the installation.




As described above, the operation of installing the ink media pack


20


in the printer can be essentially performed with one action. That is, when the printing media housing section


210


of the ink media pack


20


is pushed in along the guides, the above described rotational movement allows the ink housing section


211


to simultaneously reach the installation position, which is the substantially horizontal position in the printer.





FIG. 12

is a view showing how the ink media pack


20


is installed in the ASF


1


by means of the above described installation operation.




As shown in this figure, in the installed state, the ink housing section


211


is open relative to the printing media housing section


210


and the front opening


215


of the printing media housing section


210


is opposite to the roller section


104




a


of the sheet feeding roller unit


5


. Additionally, in this state, the rear opening


216


is opposite to the pressure plate


103


. That is, since the opening area of the rear opening


216


is larger than that of the pressure plate


103


, when the pressure plate


103


enters a pressing state, it presses the rear surface of the housed printing media


200


housed via the protective sheet


214


, thereby enabling the surface of the housed printing media


200


to be connected with the roller section


104




a


compressibly without displacing the ink media pack


20


.




The ink housing section


211


is guided as described previously and then held in a substantially horizontal direction, so that a tip portion of the ink housing section


211


which includes the joint section


220


and the pressure section


221




a


can assume a position for entering the ink jet printer main body. That is, the tip portion can be located above a moving range of the carrier


2


. Furthermore, as described later, a cam mechanism (not shown) provided in the printer main body presses the pressure section


221




a


, to activate the joint section


220


to thereby enable the ink to be supplied via the ink supply port


2


A on the carriage


2


.




For remove the ink media pack


20


from the ASF


1


, the above described operation is reversed.





FIGS. 14

,


15


, and


16


show a sheet supplying device to which an another example of a printing liquids and sheets container according to the present invention is applied.




In

FIGS. 14

,


15


, and


16


, the same components as those in

FIGS. 9

,


10


, and


12


are denoted by the same reference numerals to omit duplicate description thereof.




In

FIG. 14

, a pack sheet-feeding roller unit


223


is provided over a front opening


215


′ in a printing media housing section


210


′ of an ink media pack


20


′. Additionally, as shown in

FIG. 15

, the shaft portion


104


has a gear


115


fixed to one end thereof and meshed with a pack sheet-feeding gear


225


, described later.




The pack sheet-feeding roller unit


223


comprises a shaft portion


223




s


disposed to traverse the front opening


215


′ along a direction orthogonal to the feeding direction shown by the arrow F in

FIG. 14

, and two roller portions


223




a


fixed to the shaft portion


223




s


and spaced by a predetermined distance. Opposite ends of the shaft portion


223


are supported on sidewall portions formed opposite longitudinal opposite side ends of the printing media


200


so that the shaft portion


223


can be rotationally moved. In addition, the shaft portion


223




s


has a pack sheet-feeding gear A


224


fixed at one end thereof between the shaft portion and the corresponding sidewall portion. The pack sheet-feeding gear A


224


is meshed with a pack sheet-feeding gear B


225


supported inside the sidewall portion and under the gear A


224


so as to be rotationally moved. The pack sheet-feeding gear B


225


is arranged to mesh with the gear


115


, disposed over it when the ink media pack


20


′ is installed as described later.




The distance between the D-shaped roller portions


223




a


disposed at equal intervals from a central portion of the shaft portion


223




s


is set smaller than the distance between the roller portions


104




a


. An outer peripheral portion of each of the D-shaped roller portions


223




a


is formed of a material having a friction coefficient and a chemical structure that are optimal for the friction coefficient of the unique printing media housed in the printing media housing section


210


′ of each ink media pack


20


′. The diameter of the roller portion


223




a


is relatively small and is set such that the amount of feeding achieved by two rotations of the roller portion


223




a


equals the amount of feeding achieved by one rotation of the roller portion


104




a.






When the ink media pack


20


′ is installed as described later, flat portions of the D-shaped roller portions


223




a


extend substantially parallel with the flat portions of the roller portions


104




a.






Further, as shown in

FIG. 14

, arc-shaped butting ribs


212





d


abutted against the corresponding stoppers


102




f


are formed in peripheral portions of the front opening


215


′ which connect to opposite sidewall portions. An ink case cover


219


′ located opposite the pack sheet-feeding roller unit


223


has recesses


226


formed therein correspondingly to the roller portions


223




a


and into which the corresponding roller portions


223




a


are partly inserted when an ink housing section


211


′ covers the front opening


215


′.




A plurality of rubber caps


222


′, described later, are provided in a line and adjacent to one of the two butting ribs


212





d


. A guide rib


212





c


, described later, is provided outside each butting rib


212





d


along the corresponding sidewall portion.




Next, the operation of installing the ink media pack


20


in the ASF


1


will be described chiefly with reference to

FIGS. 14

to


16


.




The ink media cap


20


′ is configured so as to be installed in and removed from the ASF


1


of an ink jet printer, and configurations required for the installation and removal are provided in the ASF


1


and the ink media cap


20


′.




The guide ribs


212





c


of the ink media cap


20


′ are principally used to guide the insertion of the printing media housing section


210


′ into the ASF


1


; the guide ribs


212





c


engage with the introduction guides


102




e


and slides along them to enable the installation of the printing media housing section


210


′ to be guided. The guide ribs


212





c


continue sliding until butting ribs


212





d


(see

FIGS. 14 and 15

) formed at the opposite side portions of the printing media housing section


210


′ butt against the stoppers


102




f


(see

FIGS. 15 and 16

) provided on the base right-hand plate


102




a


and the base left-hand plate


102




b


. This determines a position of the printing media housing section


210


relative to the base


102


for installation and arrangement and allows the pack sheet-feeding gear B


225


and the gear


115


to be appropriately meshed with each other. In this case, flat portions of the rollers


223




a


are located substantially parallel with the flat portions of the roller portions


104




a.






When the above printing media housing section


210


′ is installed, the printer-side connector


310


(see

FIG. 10

) provided in the ASF and the connector


400


provided on the lower end surface of the printing media housing section


210


′ are connected together to allow the printer to know that the ink media pack


20


′ is installed. In addition, after the installation, a lock lever


150


provided on the left-hand plate


102




b


of the ASF


1


and supported by a lever shaft


150




a


so as to be rotationally moved is rotated in the direction shown by the arrow, as shown in

FIG. 10

, to insert a projecting portion


150




b


of the lever


150


into a lock hole


210


′ formed in the ink media pack


20


′, thereby enabling the ink media pack


20


′ to be fixed to the ASF


1


. This fixation ensures that the connectors are connected together while the pack sheet-feeding gear B


225


and the gear


115


are meshed with each other as described above.




On the other hand, the operation of installing the ink housing section


211


′ of the ink media pack


20


′ is guided through the engagement between the guide grooves


102




d


formed in the base right- and left-hand plates


102




a


and


102




b


of the ASF


1


and guide bosses


218





b


provided on the opposite side portions of the ink case


218


′ of the ink housing section. That is, during the above described operation of installing the printing media housing section


210


′, the two guide bosses


218





b


of the ink housing section


211


′ are engaged with the two corresponding guide grooves


102




d


of the ASF


1


via their open ends, as shown in FIG.


16


. Then, in response to the above described operation of inserting the printing media housing section


210


′, the ink housing section


211


′ are rotated around the rotation axis


212




e


. Once the insertion operation has been ended, the ink housing section


211


assumes a substantially horizontal predetermined position, shown in

FIGS. 15 and 16

, to complete the installation.





FIG. 16

is a view showing how the ink media pack


20


′ is installed in the ASF


1


by means of the above described installation operation.




As shown in

FIG. 16

, in the installed state, the ink housing section


211


′ is open relative to the printing media housing section


210


′, with the front opening


215


′ of the printing media housing section


210


′ opposite to the roller portions


104




a


of the sheet feeding roller unit


5


. At this time, a rear opening


216


′ is opposite to the pressure plates


103


. That is, since the opening area of the rear opening


216


′ is larger than that of the pressure plates


103


, when the latter are pressed, the rear surface of the printing media


200


can be pressed via a protective sheet


214


to bring the front surface of the housed printing media


200


into pressure contact with the roller portions


223




a


without displacing the ink media pack


20


′. The rollers


104




a


are located above the roller portions


223




a


so that the surface of the printing media


200


is not in contact with the roller portions


104




a.






The ink housing section


211


′ is guided and held in a substantially horizontal direction as described previously, and a tip portion of the ink housing section


211


′ which includes joint section


220


′ and a pressurizing section


221


′ can be located so as to enter the ink jet printer main body. That is, this tip portion can be located above the movement range of the carriage


2


. Further, as described later, a cam mechanism (not shown) provided in the printer main body presses the pressurizing section


221





a


to actuate the joint section


220


′ to allow the ink to be supplied via the ink supply port


2


A on the carriage


2


.




To remove the ink media pack


20


′ from the ASF


1


, the above described operation is preformed in the reverse order.





FIG. 17

is a block diagram of a system comprising an ink media pack and an ink jet printing apparatus including an example of a sheet supplying device according to the present invention, principally showing a control configuration of the system.




In the ink jet printer, a microprocessor (MPU


301


) controls the entire ink jet printer in accordance with a control program stored in a ROM


302


. A RAM


303


includes a receive data buffer saving printing data transferred from a host apparatus


300


and is used as a work area in which the MPU


301


performs its processes.




The RAM


303


also has areas that can store ink information indicating the types of inks used for the last printing operation and ink information indicating the types of inks to be used for the next printing operation. If a pack is installed, the ink information to be used for the next printing operation is read out from a memory for that pack. If the pack is removed, that information is stored in a memory of the printer. Each piece of this ink information is stored as distinguished from each corresponding tank section that stores the ink. This information serves to prevent the same ink from being wastefully replaced before and after the pack is installed and removed.




The MPU


301


controls rotation of a carriage motor and of a conveyance motor for also supplying a rotational movement force to the sheet feeding roller gear C


112


, via an I/O port


305


and a motor driving circuit


306


, based on command and printing data transferred from the host computer (host apparatus)


300


via a transmission and reception means


304


comprising a well-known centronics interface or the like, in accordance with the procedure of the program stored in the ROM


302


. The MPU


301


also outputs the printing data to a printing head


501


via a head control section


307


and a head driving section


308


to control a printing operation of the printing head. In addition, a timer


309


is provided for producing a drive pulse width for the printing head and controlling the rotation speed of each motor.




On the other hand, in the system of the ink media pack


20


connected to the above described ink jet printer to work, an EEPRPOM


402


is mounted which enables electric reads and writes when mounted on a printed circuit board


401


(see

FIG. 5

) and which can retain data even while no voltage is being applied thereto. The EEPROM


402


of this embodiment is of a general serial type that is operative when a CS signal is at an “H” level. That is, when the CS signal is at the “H” level, a CLK signal


312


rises, a command (write, read, delete, or the like) on a DI input signal


313


or write data is written to the EEPROM


402


, and read data are output onto a DO output signal


314


, from which they can then be read. Signal lines


311


to


314


are each connected to the I/O port


305


in the main body via the connector


310


of the main body to accomplish a data read and write under the control of the MPU


301


. The serial EEPROM


402


has a capacity of about several-K bits and can be rewritten about 10


5


to 10


7


times; it is thus suitable as a rewritable storage element for storing information on the printer of this embodiment.




Furthermore, the ink jet printer has a switch


315


for detecting that the ink media pack


20


is installed, the switch


315


being activated when the ink media pack


20


is installed. An output signal


316


from the switch


315


is input to the I/O port


305


. The MPU


301


reads this signal to detect the installation or removal of the ink media pack


20


.




At the time of detecting the installation of the pack


20


, the MPU


301


uses an output signal


317


from the I/O port


305


to supply power to the EEPROM


402


in the pack


20


to enable a read from or a write to the EEPROM


402


.




The information stored in the EEPROM


402


in the ink media pack


20


is roughly divided into that written thereto in a factory when the pack is manufactured and which is subsequently simply read out by the ink jet printer, and that rewritten by the ink jet printer after the pack has been installed in the ink jet printer. The former information is represented by the types of printing media and inks set in the pack.





FIGS. 18 and 19

are flow charts showing processes executed by the printer in connection with the installation of the above described ink media pack


20


or the like.

FIG. 18

shows a process executed when the installation of the ink media pack


20


or the like is carried out while the power to the printer is on.

FIGS. 19A and 19B

show a process procedure executed when the installation of the ink media pack


20


or the like is carried out while the power to the printer is off. These processes can be executed by electrically connecting a connector


400


provided in the ink media pack


20


to the connector


310


of the printer.




As shown in

FIG. 18

, if the installation of the ink media pack


20


or the like is carried out while the power is on, it is executed as part of a printer printing standby process (step S


101


). That is, this process is activated at predetermined time intervals during printing standby to first determine whether or not the ink media pack


20


has been installed in the printer (S


102


). This determination process is executed using data on installation/non-installation which are written to a predetermined memory of the printer together with data such as the ID of the ink media pack and the types of the inks and printed media. If it is determined that these data are different from the last ones, the current state, including the ID of the ink media pack


20


(if installed), is written to the above memory (S


103


). The above described memory is then referenced to determine whether or not the ink media pack


20


is currently installed (S


104


). The determination of the installation/non-installation of the ink media pack


20


may be based on the state of the switch


315


for detecting the installation.




If it is then determined that the ink media pack


20


is installed, it is determined that the state where the ink media pack


20


is not installed has been changed to the state where it is installed and a process A, described below, is executed and the standby process at step S


101


is continued.




On the other hand, if it is determined at step S


104


that the ink media pack


20


has been removed, two cases are possible: {circle around (1)} the paper


4


has been installed and {circle around (2)} an operation of changing the ink media pack


20


to a different type is being performed. Thus, step S


106


and subsequent steps are executed.




That is, to distinguish the cases {circle around (1)} and {circle around (2)} from each other, the presence of the ink media pack


20


and the presence of the printing data are monitored (S


106


and S


109


). When whether or not the ink media pack


20


is present is detected at step S


106


and if it is determined that the state is the same as the last one, that is, the ink media pack


20


has been removed and it is further determined that the printing data has been transmitted from the host (S


109


), then it is determined that the paper


4


is installed and a process (b), described below, is executed.




In addition, if the presence of the ink media pack is detected at step S


106


before the printing data are transmitted, then it is determined that the ink media pack


20


has been installed. It is then determined at step S


107


whether or not the types of the inks in the ink media pack are the same as those in the previously installed ink media pack. Then, the process (a) is executed only if the types of the inks are different. If the types of the inks remain unchanged, since the inks in the printing head need not be replaced, and the standby process is thus continued.




Next, the process executed when the installation of the ink media pack


20


or the like is carried out while powering off the printer will be described with reference to

FIGS. 19A and B

.




As shown in

FIG. 19A

, when a power-off operation is performed, data on the current installation state of the ink media pack


20


is written to the above described memory (S


111


) and the power is then shut off. The ink media pack


20


may be installed or removed while the power is off.




Then, when a power-on operation is performed, the process shown in

FIG. 19B

is activated to compare the current installation state of the ink media pack


20


with the installation state written at the above step S


111


, at step S


112


. At that time, if the installation state of the ink media pack


20


is the same, the inks in the head need not be replaced and the procedure shifts directly to the standby process shown in

FIG. 18

to end the present process.




On the other hand, if the installation state of the ink media pack


20


is different, it is determined whether or not the ink media pack


20


is present (S


113


). At this time, if the absence of the ink media pack


20


is detected, it is considered that two cases are possible: {circle around (1)} the paper


4


has been installed and {circle around (2)} the operation of changing the ink media pack


20


to a different type is being performed. Thus, the procedure shifts to the processing at step S


106


shown in

FIG. 18

, as described in FIG.


18


.




If the presence of the ink media pack


20


is detected, then the information on the types of the inks in the ink media pack


20


are compared with the information on the ink types written at step S


111


(S


114


). At this time, if the ink types are the same, the inks in the printing head need not be replaced and the procedure shifts to the standby process to end the present process.




On the other hand, if the ink types are different, after the process (a), described below, is executed and the procedure then proceeds to the standby process in order to replace the inks in the printing head.




Next, the above mentioned processes (a) and (b) will be explained mainly with reference to FIG.


1


.




Process (a)




This process is executed if the ink media pack has been replaced with a different type. First, the carriage


2


moves to the positions of the cap


41


and recovery system


42


for the media pack. While moving for each ink color, the carriage


2


sucks the ink from the printing head side to empty the printing head and the sub-tank and then supplies each color ink at the same ink supply position, as described later. Once each color ink supply has sufficiently finished, the carriage


2


moves to its home position to execute the above mentioned standby process for the printing command.




During the standby process at the above described step S


101


, when the printing command is issued, the printed media


200


are fed from the ink media pack


20


and printing is then carried out. After the printing has been completed, the media are discharged. During the printing, if the ink must be supplied to the sub-tank, then the carriage moves to the ink supplying position to supply each color ink as described above.




Process (b)




This process is executed if the paper


4


is directly installed in the ASF


1


and if images or the like are printed on the paper. First, the carriage


2


moves to the positions of the cap


41


and recovery system


42


for the paper. While moving for each ink color, the carriage


2


sucks the ink from the printing head side to empty the printing head and the sub-tank and then supplies each color ink at the same ink supply position, as described later. Once each color ink supply has sufficiently been finished, the carriage


2


moves to its home position to execute the above mentioned standby process for the printing command.





FIG. 20

is a flow chart schematically showing a printing process executed by the ink jet printer of this embodiment and showing a control procedure executed by the MPU


301


. The process shown in this figure relates mainly to setting of a printing mode prior to printing and is executed substantially parallel with the process for printing standby described above in

FIGS. 18 and 19

.




After the power supply to the ink jet printer has been turned on, the MPU


301


initializes the apparatus (S


302


). Then, the MPU reads state of the pack installation detecting switch


315


via the input port


305


(S


302


). When the switch


315


is active, the MPU determines that the pack


20


is installed and supplies power to the EEPROM


402


(S


303


) to read various data stored in the EEPROM


402


(S


304


). The EEPROM


402


has various data such as the IDs of the types of printing media and inks accommodated in the ink media pack


20


and printing control parameters stored before shipment. The MPU transfers the data read from the EEPROM


402


to the host equipment


300


via the transmission and reception means


304


such as a centronics interface (S


305


).




The maximum value of the amount of ink placed by the ink jet printer per unit area is usually determined for each type of printing media; the maximum amount of placed ink which is permitted by each recorded medium is used to record images in order to improve color reproducibility. If, for example, the amount of ink required to fill up a 600-dpi printing area is defined to be 1, this value is about 2.0 for paper, about 2.3 for glossy paper, about 2.7 for coated paper, and about 1.8 for OHP. An ideal value is 3, with which three color inks can be placed in such a manner as to overlap one another, and the amount of ink that can be placed on paper increases in the order of OHP, paper (copy paper), glossy paper, and coat paper. Additionally, the amount of placed ink varies slightly depending on the composition of the ink. Further, depending on the type of printing media varies how the ink is fixed to the printing media and permeates therethrough varies and how significant irregular colors, streaks, or the like are. For example, coat or glossy paper has more significant irregular colors, streaks, or the like than paper or OHP, so that the number of printing passes is generally increased for coat or glossy paper rather than for paper or OHP in order to obtain high-grade printing results. The number of passes refers to the number of scans executed by the printing head to complete one line of printing; a method for completing one line of printing with multiple scans is referred to as a “multipass method”.




Taking these circumstances into account, a printer driver in the host equipment


300


automatically creates optical printing data without the user's selections, based on the ID information stored in the EEPROM


402


before shipment and including the types of printing media and inks in the pack


20


, and then transfers the data to the ink jet printer. That is, the host equipment


300


creates optimal printing data and transfers then to the ink jet printer, taking into consideration optimal image processing for a combination of printing media and inks in the pack


20


installed in the ink jet printer, the amount of placed ink, and the number of print passes (the number of passes for the multipass method). In addition to or as alternatives to the above described IDs of the types of printing media and inks, image processing parameters such as the amount of placed ink and the number of print passes may be transmitted to the host equipment


300


and stored in the EEPROM


402


.




Next, the MPU reads various parameters on the printing operation of the ink jet printer (S


310


). These parameters were stored in the EEPROM


402


before shipment and include, for example, a drive pulse width for the printing head, the number of dots for auxiliary ejection which is used when an auxiliary amount of ink is ejected to prevent the printing head from failing to eject the ink, time intervals for the auxiliary ejection, time intervals for recovery and suction operations required to keep the printing head normal. The MPU sets these parameters in a printing control circuit


307


of the ink jet printer (S


311


). This, in combination with the optimization executed by the printer driver, enables more optimal control.




Subsequently, the MPU waits for the printing data to be received from the host equipment


300


(S


306


), and upon receiving the printing data, executes a printing operation based thereon (S


307


). Once printing for one page has been completed, the power supply to the EEPROM


402


is turned off (S


308


). Subsequently, the process returns to step S


302


to read the state of the pack installation detecting switch


315


via the I/O port


305


.




On the other hand, when the pack installation detecting switch


315


is inactive at step S


302


, the MPU determines that the pack


20


is not installed and executes a normal printing operation (S


309


). That is, the ink jet printer is set to be able to record the printing data with the print grade and speed designated by the user via the printer driver of the host equipment


300


and then executes printing using the ink from the paper and ink refilling unit


30


of the ink jet printer and the printing media set in the ASF


1


.




The above control sets the ink jet printer to be able to record, without the user's designations, the printing data optimized depending on the combination of the inks and printing media set in the ink media pack, thereby enabling printing with high-grade image quality. Additionally, since the various parameters on the printing operation of the ink jet printer are read from the EEPROM


402


of the ink media pack and then set in the printing control circuit


307


of the ink jet printer, even if, for example, a pack for a combination of printing media and inks that is not assumed before the sale of the ink jet printer is additionally sold, printing is possible with optimal printing control for that combination of printing media and inks.




(Other Embodiments)




The pack


20


may contain the above described information written thereto before shipment, information written or rewritten in recycling the pack (the number of times that the pack has been recycled, and other information), or information written or rewritten by the ink jet printer. The information rewritten by the ink jet printer with the pack


20


installed therein includes, for example, the number of printing media remaining in the pack


20


and the amount of ink remaining in the pack


20


.




In embodiments other than those described above, the information rewritten by the ink jet printer with the pack


20


installed therein includes the number of printing media in the pack


20


and the amount of ink remaining in the pack


20


.





FIG. 21

is a flow chart showing an example of another control provided by the MPU


301


.




In

FIG. 21

, after the ink jet printer has been powered up, the MPU


301


initializes the apparatus at step S


401


. Next, at step S


402


, the state of the installation detecting switch


315


for the ink media pack


20


is read via the I/O port


305


. At this time, if the switch


315


is active, then it is determined that the ink media pack


20


is installed. At step S


403


, the power is supplied to the EEPROM


402


to read the number of remaining printing media stored in the EEPROM


402


(step S


404


). At step S


405


, the read data are transferred to the host equipment


300


via the above mentioned transmission and reception means


304


such as an centronics interface.




A status monitor of the host equipment displays the current number of remaining printing media housed in the ink media pack


20


on the monitor. Then, when it is determined at step S


406


that the printing data have been received from the host equipment, the printing media in the ink media pack


20


are fed at step S


407


. Then, at step S


408


, the data on new value equal to the number of currently remaining printing media minus one is written to the EEPROM


402


and transferred to the host equipment


300


. The number of remaining printing media displayed on the monitor is changed (S


409


) and the printing operation is performed at step S


410


. Once printing has been completed for one sheet, then at step S


411


, the data on value of the amount of remaining ink is read from the EEPROM


402


for each color. Then, the amount of ink ejected for the printing for this sheet and the amount of preliminary ejection are subtracted from the read value or the amount of sucked ink is subtracted from the read value if a suction operation has been performed, and the data on the result is written to the EEPROM


402


. Subsequently, at step S


412


, assuming that the ink media pack


20


is to be removed, the process shifts to step S


402


to repeat the above mentioned process. Precisely speaking, the amount of ink remaining in the ink housing section is calculated based on the amount of ink supplied from the ink housing section to the sub-tank in the carriage. Since, however, a small amount of ink is housed in the sub-tank and the ink is thus frequently supplied from the ink housing section to the sub-tank, the amount of ink ejected for printing, the amount of ink for preliminary ejection, and the like can be directly used to calculate the amount of ink remaining in the ink housing section.




The EEPROM


402


stores information of initial values such as the number of printed media remaining in the pack


20


and the amount of remaining ink stored therein before shipment and during recycling. In addition, during the printing operation at step S


410


, a locking mechanism (not shown) can be used to lock the pack


20


at a specified position to prevent the user from removing the pack


20


during a write to the EEPROM


402


, thereby improving the safety of the system.




The above process enables the current number of printing media in the ink media pack


20


to be determined so that this data can be transmitted to the host equipment


300


, where it can be displayed on a CRT of the host equipment


300


, thereby improving the user interface. Additionally, the latest state of the interior of the ink media pack


20


can always be determined so that this information can be read and used for a process of determining the amount of inks injected for recycling or other processes.




Precisely speaking, the amount of ink remaining in the ink housing section is calculated based on the amount of ink supplied from the ink housing section to the sub-tank in the carriage. If, however, a small amount of ink is housed in the sub-tank and the ink is thus frequently supplied from the ink housing section to the sub-tank, the amount of ink ejected for printing, the amount of ink for preliminary ejection, and the like can be directly used to calculate the amount of ink remaining in the ink housing section, as described above. That is, when the printing has been completed for one sheet, the data on the value of the amount of remaining ink is read from the EEPROM


402


for each color. Then, the amount of ink ejected for the printing for this sheet and the amount of preliminary ejection are subtracted from the read value or the amount of sucked ink is subtracted from the read value if a suction operation has been performed, and the data on the result is written to the EEPROM


402


as the new amount of remaining ink.




In addition, the information that can be rewritten by the ink jet printer includes the number of remaining printing media in the pack and the amount of remaining ink, as well as information on the recycling of the pack such as the number of times that the pack has been installed and removed, the number fed sheets, the number of recycles, and a manufacturing date. The information on the pack recycling can be rewritten from the ink jet printer or during the pack recycling. The resulting information can be used during the pack recycling to make determinations for replacing only parts the lifetimes of which are over, thereby improving eco-friendliness and allowing the pack to be appropriately recycled.




(Other) printing heads capable of ejecting inks may include ink jet printing heads comprising an electrothermal converter for generating thermal energy as ink ejecting energy, that is, those that generate bubbles in an ink and that use the bubbling energy to eject the ink. In addition to the above described serial-type printing apparatus, the present invention is applicable as what is called a full-line type printing apparatus that executes printing using a printing head extending a long distance in a width direction of printed media.




Next, an ink replacing system and an ink supplying method included in this embodiment will be described.




The ink replacing system of this embodiment supplies the ink from each ink tank housing section of the above described ink media pack, which is an ink source, to the corresponding sub-tank mounted in the carriage of the printer apparatus main body. It principally comprises sub-tanks, printing heads, ink-air introducing mechanism ink-air introducing mechanisms, and others.





FIGS. 22

to


27


are a side vertical sectional views showing the sub-tank, printing head, and ink-air introducing mechanism of the ink replacing system.

FIG. 22

shows how these components operate while the printing operation is being performed,

FIG. 23

shows how these components operate when the pressure of the sub-tank is reduced,

FIG. 24

shows how these components operate while an air is introduced,

FIG. 25

shows how these components operate while an ink and air discharging operation is being performed,

FIG. 26

shows how these components operate when the pressure of the sub-tank is reduced again, and

FIG. 27

shows how these components operate when an ink is introduced.




In each figure, reference numeral


501


denotes a printing head having a large number of electrothermal converters or electrostrictive elements (not shown) arranged therein and acting as a source of ink ejecting pressure, and a large number of nozzle sections also arranged therein and each having an ejection port


502


for ejecting an ink. A source of ink ejecting pressure in each nozzle section is connected with a head driving circuit for supplying a printing signal (not shown) and electricity.




Reference numeral


520


denotes a sub-tank for storing an ink from the ink housing section


211


formed in the ink media pack and acting as an ink source, the sub-tank having the printing head


501


connected integrally with its bottom portion.




In the sub-tank


520


, reference numeral


521


denotes a sub-tank main body constituting an outer shell of the sub-tank


520


and having decompression chambers


505


identical to applied ink types in number (in this case, four types). The decompression chambers


505


are each connected to an intake passage


505




c


that is in communication with a pressure reduction adjusting port


506


formed at a bottom of the sub-tank main body


521


.




Additionally, each sub-tank main body


521


has four holes H including the above mentioned introduction port


508




a


and formed in a top surface thereof in a line along a vertical direction (that is orthogonal to a main scanning direction) in such a manner as to correspond to one of the decompression chambers


505


as shown in FIG.


20


. The entire sub-tank has 16 holes H in the form of a matrix. Of these holes, the four introduction ports


508




a


formed in each decompression chamber


505


are arranged on a line crossing the main scanning direction, corresponding to the moving direction of the carriage. On the other hand, the holes H other than the introduction ports


508




a


are an opening of recesses


508




c


through which introduction needles


553


, described later, are passed and each of which has an elastic ink leakage preventing member (not shown) fixed to a bottom surface of the recess


508




c.






Further, the introduction passage


508


has a sealing mechanism


509


for sealing the introduction port


508




a


formed in an upper end portion of the passage


508


in such a manner that the port can be opened and closed. The sealing mechanism


509


comprises a ball Valve


509




a


housed in a valve housing chamber


508




b


formed in the upstream portion of the introduction passage


508


, and a spring


509




b


for urging the ball valve


509




a


. An urging force of the spring


509




b


causes the introduction port


508




a


to be normally sealed with the ball valve


509




a


. Reference numeral


510


denotes an ink leakage preventing member comprising an elastic member and fixed to an outside of the introduction port


508




a


. In addition, reference numeral


505




b


denotes a lead-out valve provided in a lead-out port


505




a


to the introduction passage


508


and which enables inks and air to be lead out to the introduction passage


508


, while hindering the inks and air from flowing backwards from the introduction passage


508


.




Reference numeral


507


denotes a pressure reduction adjusting mechanism inserted into the intake passage


505




c


. The pressure reduction adjusting mechanism


507


comprises a valve housing chamber


507




a


formed in the suction passage


505




c


, a pressure reduction adjusting valve


507




b


inserted into the valve housing chamber


507




a


, and a spring


507




c


for urging the pressure reduction adjusting valve


507




b.






The pressure reduction adjusting valve


507




b


normally keep communication between the intake passage


505




c


and the pressure reduction adjusting port


506


shut off by means of the urging force of the spring


507




c


. However, when a predetermined pressurizing member (not shown) is inserted through an insertion hole


521




a


formed in a side surface of the sub-tank main body


521


and the pressure reduction adjusting valve


507




b


is moved against the urging force of the spring


507




c


, the pressure reduction adjusting port


506


and the intake passage


505




c


communicate with each other via an intake passage (not shown) formed in the pressure reduction adjusting valve


507




b


to reduce the pressure in the decompression chamber


505


.




Thus, the pressure reduction adjusting valve


507




b


is shut off from outside air to maintain a reduced pressure therein because the pressure reduction adjusting port


506


is closed except when the degree of pressure reduction is to be adjusted. When the pressure reduced state is thus formed, the ink in the sub-tank


505


has its pressure reduced to preclude the ink from dropping, while preventing air from being drawn in through the ejection port


502


. Consequently, an appropriate ink meniscus can be formed at the ejection port


502


to quest for stabilizing the ink ejection. The adjusting a degree of pressure reduction can be contorolled by providing in the intake passage


505




c


a pressure sensor acting as a pressure reduction measuring means.




Reference numeral


503


denotes an ink liquid chamber housed in the above mentioned decompression chamber


505


and acting as an ink storage section. The ink liquid chamber


503


is shaped like a bag and formed of a flexible member having a lower end portion thereof fixed to a bottom surface portion of the decompression chamber. The ink liquid chamber


503


has its volume varying with a difference between its exterior and interior. In this embodiment, the flexible member comprises a lower half


503




b


formed to be thick and an upper half


503




a


formed to be thin, and the lower half


503




b


is relatively rigid and maintains a constant shape, whereas the upper half


503




a


is not so rigid and has its volume varying depending on a difference between its exterior and interior resulting from the decompression chamber. This configuration serves to reduce the internal volume during the ink discharging operation to lessen the amount of remaining ink. Thus varying the thickness of ink liquid chamber, however, is not essential to the present invention.




In addition, the ink liquid chamber


503


is in communication with the printing head


501


via the ink supplying passage


504


formed at the bottom of the decompression chamber


505


so that the ink from the ink liquid chamber


503


can be supplied to the printing head


501


via the ink supplying passage


504


.




Further, reference numeral


540


denotes a pressure reduction applying mechanism (pressure reducing means) provided in the recovery mechanism


42


. The pressure reducing mechanism


540


comprises the above mentioned pair of caps


40


and


41


, suction pumps (not shown) each provided correspondingly to one of the caps


40


and


41


and acting as a source of pressure reduction, two sets of pressure reducing paths


531


and


532


that each connect the suction pump and the cap together, an ejection port


502


of the printing head


501


, and a switching mechanism


530


for switching a pressure reduction applying state of a pressure reduction adjusting port


506


. The caps


40


and


41


each comprise an ejection-port-side sealing section


541


that covers and seals the ejection port


532


and a pressure-reducing-port-side sealing section


542


that covers and seals the pressure reduction adjusting port


506


, as shown in

FIGS. 1 and 20

. The sealing sections


541


and


542


have suction holes


541




a


and


542




a


formed therein, respectively.




Additionally, the above mentioned two pressure reducing paths


531


and


532


are composed of two tubes


531


and


532


connected to suction holes


541




a


and


542




a


in the sealing sections


541


and


542


, respectively, and one


531


of the tubes is formed of a flexible member. Further, the pressure reduction switching mechanism


530


comprises a rotational movement arm


535


positioned between the tubes


531


and


532


by a predetermined drive source and rotationally moved by a predetermined drive means, and a compressible connection roller


536


axially attached to one end of the rotational movement arm


535


, wherein selecting the position of compressible connection roller


536


by the rotational movement arm


535


allow selection between a communication state and a shut-off state in the tube


531


.




That is, when the compressible connection roller


536


is brought into connect with the tube


531


compressibly as shown in

FIGS. 23

,


25


, and


27


, the tube


531


is collapsed to shut off the communication therein to block the ejection-port-side sealing section


541


off from the suction pump. In contrast, when the compressible connection roller


536


is separated from the tube


531


as shown in

FIGS. 24 and 25

, the tube


531


recovers to its original shape to make the sealing section


541


in communication with the suction pump.




On the other hand, reference numeral


570


denotes an ink-air introducing mechanism. The ink-air introducing mechanism


570


selectively introduces an ink and outside air into the ink liquid chamber


503


in the sub-tank


521


to function as an ink introducing mechanism or a gas introducing mechanism. Additionally, the ink-air introducing mechanism has two types of ink-air introducing mechanism: paper-side one for introducing an ink and air from the above mentioned ink refilling unit


30


and an ink-media-pack-side one for introducing an ink and air from the interior of the ink media pack


20


. Both ink-air introducing mechanism have the same structure and comprise a pressurizing mechanism


560


and an introduction switching mechanism


550


.




The pressurizing mechanism


560


of the paper-side ink-air introducing mechanism is installed based on a position where the above mentioned paper-ink refilling cap


40


, while the pressurizing mechanism


560


of the pack-side ink-air introducing mechanism is installed based on a position where the special-paper-ink refilling cap


41


housed in the ink media pack


20


is disposed. In addition, pressurizing pins


561


of each pressurizing mechanisms


560


are arranged in a line along a direction (subscanning direction) orthogonal to the moving direction (main scanning direction) of the carriage


2


.




Further, one of the introduction switching mechanisms


550


is provided in a supply section


30




a


of the paper-ink refilling unit


30


, while the other is provided in a supply section


21




a


of the ink media pack


20


.




Additionally, the pressurizing mechanism


560


comprises the plurality of (in this case, four) pressurizing pin


561


penetrating a predetermined support P


1


on the printer main body in such a manner as to elevate and lower freely, a spring


563


installed with elasticity between a head


562


of each pressurizing pin


561


and the support P


1


to normally apply such a urging force that a lower end portion of the pressurizing pin


561


sinks into the support P


1


, a single eccentric cam


564


rotationally moved around a rotational movement center Co by means of a predetermined drive source. The eccentric cam


564


is provided where it is always connected with the head


562


of each pressurizing pin


561


compressibly, and allows to move rotationally around the rotational movement center Co to move all the pressurizing pins


561


upward and downward.




That is, when a point a (where the distance from the rotational movement center Co is smallest) on a circumferential surface of the eccentric cam


564


comes into contact with the head


562


of the pressurizing pin


561


, a lower end portion of the pressurizing pin


561


is set in its initial position where it sinks into the support P


1


. When a point c (where the distance from the rotational movement center Co is largest) on the circumferential surface of the eccentric cam


564


comes into contact with the head


562


of the pressurizing pin


561


, the lower end portion of the pressurizing pin


561


is set in its maximum projecting position where it projects furthest from a bottom surface of the support P


1


. Furthermore, when a point b on the circumferential surface of the eccentric cam


564


comes into contact with the head


562


, the lower end portion of the pressurizing pin


561


is set in its intermediate position between the initial position and the maximum projecting position.




On the other hand, the introduction switching mechanism


550


comprises an enclosure


556


having a plurality of (in this embodiment, four) housing chambers


556


R partitively formed correspondingly to the pressurizing pins


561


, switching blocks


551


each accommodated in the corresponding housing chamber


556


R of the enclosure


556


in such a manner as to become capable of moving up and down, introduction needles


553


each fixed a lower end of the corresponding switching block


551


and having an introduction passage


553




a


formed in a central portion thereof, and springs


554


each elastically installed between the switching block


551


and the bottom of the enclosure


556


.




The enclosure


556


has a plurality of (in this embodiment, four) insertion holes


556




a


formed in a top surface thereof in such a manner as to correspond to the pressurizing pins


561


of the above described pressurizing mechanism and into and from which the corresponding pressurizing pin


561


can be inserted and removed, and has a plurality of (in this embodiment, four) insertion holes


556




b


formed in a bottom surface thereof in such a manner as to correspond to the introduction needles


553


, which the introduction needles


553


can be inserted and removed. Furthermore, each housing chamber


556


R of the enclosure


556


has an air introducing port


558


and an ink introducing port


559


formed in a side surface thereof. The air introducing port


558


is in communication with outside air, and the ink introducing port


559


is connected via a predetermined communication passage to the paper-ink refilling unit


30


, which is a source of inks, or the ink housing section


211


of the ink media pack


20


.




Additionally, the switching blocks


551


can each be elevated and lowered through the corresponding housing chamber


556


R of the enclosure


556


by means of an O ring


552


fixed to a circumferential surface of the switching block, while maintaining a gas-tight contact with an inner surface of the housing chamber


556


R. The switching block


551


has an introduction passage


551




a


bent in the form of the character L in a fashion leading from a side opening formed in one side surface of the passage to a bottom opening formed in the center of a bottom portion of the passage; the introduction passage


551




a


is in communication with the introduction passage


553




a


in the above mentioned introduction needle


553


.




Moreover, the introduction needles


553


are arranged in the subscanning direction similarly to the pressurizing pins


561


of each pressurizing mechanism


560


. Accordingly, the introduction ports


508




a


are arranged in a direction crossing the arranging direction of the introduction needles


553


within the enclosure


556


as shown in

FIG. 28. A

disposing pitch for the introduction ports


508




a


in the subscanning direction, however, is set the same as that for the introduction needles so that the carriage


2


can be moved in the main scanning direction to sequentially align on a one by one basis among four pieces of the introduction needles


553


with the corresponding introduction ports


508




a


as shown in FIG.


28


. This introduction switching mechanism constitutes an ink introduction switching means and a gas introduction switching means.




Next, an ink replacing operation and an ink supplying operation according to this embodiment will be explained.




As described previously, this embodiment performs switching of the printing operation between the one with special paper from the ink media pack


20


or the like and the one with paper from the same, a change in the type of the media pack


20


used, and other operations, so that the types of applied inks must be changed in connection with a change in printing media, thereby requiring stored inks to be replaced with inks to be used for the next printing operation.




This ink replacement is carried out as shown in

FIGS. 22

to


27


. Description will be made by taking by way of example an operation executed to replace the inks in connection with a change in the type of the ink media pack


20


.




When a replacement command is input to replace the ink media pack, the carriage


2


with the sub-tank


520


mounted therein moves to a receding position at a side of the apparatus where it can avoid interfering with the ink media pack


20


(see FIG.


1


). Then, the ink media pack


20


being used is removed.




Subsequently, a new ink media pack


20


is installed and the pressurizing mechanism


560


is moved from the receding position to an installation position at a lateral side of the apparatus. Then, the bottom portion of the enclosure


556


in the introduction switching mechanism


550


is located close to the top surface of the sub-tank main body


521


, and the pressurizing pins


561


of the pressurizing mechanisms


560


are opposed to the corresponding insertion holes


556




a


formed in the top surface of the enclosure


556


.




Then, the information on the ink stored in each ink liquid chamber


503


is read out from the memory


400


for the newly installed ink media pack


20


, and when the ink replacing command is input, the MPU determines which inks must be replaced based on the current ink information and the information on the ink used last.




Based on this determination, the carriage


2


moves to oppose the pressure reduction adjusting port


506


formed in the bottom surface of the decompression chamber


505


storing the ink to be replaced as well as the ejection port


502


in the printing head


501


, to the sealing sections


541


and


542


, respectively, provided in the cap


40


or


41


. Subsequently, the cap


40


or


41


elevates to bring the sealing sections


541


and


542


into tight contact with peripheries of the ejection port


502


and the pressure reduction adjusting port


506


(see FIG.


20


).




Thereafter, the rotational movement arm


535


of the pressure reduction switching mechanism


530


rotates to bring the compressible connection roller


536


into connection with the tube


531


compressibly to thereby shut off the communication between the ejection port


502


and the suction pump. On the other hand, the pressure reduction switching valve


507




b


is pushed in by a push-in member (not shown) against the urging force of the spring


507




c


and the decompression chamber


505


is allowed to communicate with the suction pump via the pressure reduction adjusting valve


507




b


or the like. In this case, since the introduction passage


508


, which can communicate with the decompression chamber


505


, is shut off from outside air by the sealing mechanism


509


, the interior of the decompression chamber


505


has its pressure reduced by means of an air sucking operation of the suction pump. In addition, the upper half


503




a


of the ink liquid chamber


503


housed in the decompression chamber


505


is formed of a flexible member, so that when the pressure in the decompression chamber


505


is reduced than the atmosphere, the ink liquid chamber


503


has its volume changed correspondingly to have its pressure reduced.




Then, when the decompression chamber


505


reaches a fixed degree of pressure reduction, the pressurizing member (not shown) cancels the pressure on the pressure reduction adjusting valve


507




b


, which thus returns to its initial position due to the urging force of the spring


507




c


to shut off the communication between the intake passage


505




c


and the suction pump to thereby maintain a state of the reduced pressure in the decompression chamber


505


and in the ink liquid chamber


503


(see FIG.


20


).




Then, the eccentric cam


564


is rotated around the rotational movement center Co by the drive means (not shown) and then stopped where its circumferential point b comes into contact with the head


562


. This causes the pressurizing pin


561


to project from the bottom surface of the support P


1


and pass through the insertion hole


556




a


into the enclosure


556


to push the switching block


551


downward, so that the air introducing port (gas introducing port)


558


and the introduction passage


551




a


communicate with each other (see FIG.


24


). As a result, outside air is introduced into the ink liquid chamber


503


, having its pressure reduced, from the air introducing port


558


through the introduction passages


551




a


,


553




a


, and


508


and the introduction valve


505




b


. This pressure reduction and air introduction causes the ink to be rolled and agitated inside the ink liquid chamber


503


to allow the ink to flow more smoothly.




Then, the suction pump, acting as a source of suction, is activated to discharge the ink used for the last printing operation and remaining in the ink liquid chamber


503


, from the ejection port


502


via the tube


531


(see FIG.


25


). This discharge step enables the ink in the ink liquid chamber


503


to be completely discharged, but for more reliable discharge, it is also effective to repeat the above described pressure reducing, air introducing, and discharge steps or reciprocate the carriage


2




a


predetermined distance to roll the internal ink.




After the ink has completely been discharged, the eccentric cam


564


is rotated to bring its circumferential point a into the head


562


, as shown in FIG.


26


. This causes the pressurizing pin


561


to return to its initial position located above due to the urging force of the spring


563


to exit the enclosure


556


of the introduction switching mechanism


550


. Consequently, the introduction needle


553


, with the switching block


551


, elevates due to the urging force of the spring


554


to exit the introduction port


508




a


. Thus, the urging force of the spring


509




b


causes the ball valve


509




a


to occlude the introduction port


508




a


to the introduction passage


508


to thereby shut off the communication between the introduction port


508




a


and outside air.




At the same time, the pressure reduction adjusting valve


507




b


of the pressure reduction adjusting mechanism


507


is pressed against the force of the spring


507




c


to allow the intake passage


505




c


and the tube


532


to communicate with each other, thereby allowing the decompression chamber


505


to communicate with the suction pump. On the other hand, the compressible connection roller


536


of the pressure reduction switching mechanism


530


is used to shut off the communication between the ejection port


502


and the suction pump, which is then driven. As a result, the ink liquid chamber


503


has its pressure reduced again.




Then, the pressurizing mechanism


560


is driven to rotate the eccentric cam


564


to bring its circumferential point c into connect with the head


562


compressibly (see FIG.


27


). This causes the pressurizing pin


561


to project downward to move the switching block


551


to its maximum projecting position to thereby allow the ink introducing port


559


and the introduction passage


551




a


to communicate with each other. This in turn enables communication through the path from the ink media pack


20


, which is a source of inks, to the ink liquid chamber


503


, that is, the path from the ink media pack


20


through the ink supplying tube


218




c


, ink introducing port


559


, and introduction passages


551




a


,


553




a


, and


508


to ink liquid chamber


503


.




In this case, during the pressure reducing step shown in

FIG. 23

, both the ink liquid chamber


503


and the decompression chamber


505


have their pressures reduced, so that the ink stored in the ink media pack


20


is introduced into the ink liquid chamber


503


via the above mentioned path. Once the ink liquid chamber


503


then is filled with the ink, the eccentric cam


564


is rotated to remove the pressurizing pin


561


from the enclosure


556


to remove the introduction needle


553


from the introduction port


508




a


to thereby complete the ink introducing step, thereby completing the ink replacing step for the one ink housing chamber. In this regard, the operation during the ink introducing step is identical to the operation executed to supply the ink, which has been consumed by the printing or recovery operation.




In addition, after the introduction needle


553


has been removed after the ink filling as in

FIG. 23

, the degree of pressure reduction may further be adjusted in order to make the pressure in the sub-tank


520


suitable for the printing operation.




After the ink liquid chamber


503


in one of the decompression chambers


505


in the sub-tank


520


has been supplied with the ink as described, if another ink liquid chamber


503


must be supplied with the ink, the cap


40


or


41


first lowers to separate from the bottom surface of the sub-tank


505


, and the above described elevating and lowering mechanism then lowers the carriage


2


with the sub-tank to separate from the enclosure


565


. Subsequently, the carriage


2


moves in the main scanning direction to oppose the pressure reduction adjusting port


506


and ejection port


502


in the another pressure reduction chamber


505


to the cap


40


or


41


. Then, the cap


40


or


41


elevates again to seal the pressure reduction adjusting port


506


and the ejection port


502


, and then the pressure reducing, air introducing, discharge, pressure reducing, ink introducing, and other steps are subsequently sequentially executed as described above. The above operation is repeated for each decompression chamber


505


for which the ink must be replaced.




The four pressurizing mechanisms


560


provided in this embodiment are structured so that the single eccentric cam


564


simultaneously elevates and lowers equal parts all the pressurizing pins


561


. Thus, all the switching blocks


551


and introduction needles


553


of the introduction switching mechanism


550


are simultaneously pressed in response to the pressurizing operation of the pressurizing pins


561


.




However, only one of the introduction needles


553


among each introduction needles


553


is inserted into the introduction port


508




a


as described above, with the other introduction needles


553


inserted into those three of the twelve introduction-needle inserting recesses


508




c


formed in the top surface of the sub-tank main body


521




a


which belong to the same row. The recesses


508




c


each have the appropriately elastic ink-leakage preventing member on its bottom surface in such a manner that the lower end of the introduction needle


553


inserted into the recess


508




c


comes into connect with this ink-leakage preventing member compressibly. Thus, unwanted ink leakage can be prevented without damaging the tip of the introduction needle


553


. Additionally, since the introduction port


508




a


of the introduction passage


508


not having the introduction needle


553


inserted thereinto is kept occluded by the ball valve


509


, no dust can enter the introduction passage


508


.




Although the introduction passages


551




a


,


553




a


, and


508


in this embodiment are used both for inks and for air to allow both of them to flow therethrough, ink introduction passages and an air introduction passage may be separately provided.




In addition, in this embodiment, the ink is discharged from the ink liquid chamber by ejecting it from the ejection port in the printing head


501


, but an ink ejecting channel having a relatively large flow area may be formed separately from the ejection port to eject the ink therethrough, thereby increasing ink discharging speed and preventing a decrease in the lifetime of the ejection port caused by the ink discharge.




The present invention has been described in detail with respect to preferred embodiments, and it will now be apparent from the foregoing to those skilled in the art that changes and modifications may be made without departing from the invention in its broader aspects, and it is the intention, therefore, in the appended claims to cover all such changes and modifications as fall within the true spirit of the invention.



Claims
  • 1. A printing liquids and sheets container comprising:a case main body section removably disposed in a conveying mechanism forming section for conveying sheets to a printing section that performs a printing operation on printing surfaces of said sheets using printing liquids, said case main body section having a sheet discharging opening portion which has a cover member disposed in said case main body section so as to be opened and closed relative to said sheet discharging opening, to selectively cover said sheet discharging opening; a sheet accommodating section formed in said case main body section to accommodate said sheets; and a liquid accommodating section formed in said case main body section to accommodate said liquids, wherein, said sheets taken out from said sheet accommodating section are discharged when a conveying force output from said conveying mechanism forming section acts on said sheets through the sheet discharging opening portion formed in said case main body section.
  • 2. A printing liquids and sheets container according to claim 1, wherein said cover member further has a guide member guided while engaging with an engagement section in response to an operation of installing said case main body section, said engagement section being separated from a portion of said conveying mechanism forming section in which said sheet accommodating section of said case main body section is arranged, so that said cover member is automatically shifted from a closed state to an open state relative to said sheet discharging opening portion by means of cooperation between said guide member and said engagement section.
  • 3. A printing liquids and sheets container according to claim 1, wherein said cover member further has a guide member guided while engaging with an engagement section in response to an operation of installing said case main body section, said engagement section being separated from a portion of said conveying mechanism forming section in which said sheet accommodating section of said case main body section is arranged, so that said cover member is automatically shifted from an open state to a closed state relative to said sheet discharging opening portion when said guide member is disengaged from said engagement section.
  • 4. A printing liquids and sheets container comprising:a case main body section removably disposed in a conveying mechanism forming section for conveying sheets to a printing section that performs a printing operation on printing surfaces of said sheets using printing liquids; a sheet accommodating section formed in said case main body section to accommodate said sheets; a liquid accommodating section formed in said case main body section to accommodate said liquids; a sheet pressurizing opening portion for allowing sheet pressurizing means and said sheet accommodating section to communicate with each other in order to directly or indirectly apply a pressurizing force of said sheet pressurizing means to said sheets in said sheet accommodating section, said sheet pressurizing means being formed in said sheet accommodating section of said case main body section and provided in said conveying mechanism forming section; and a sheet protecting member disposed in said sheet accommodating section of said case main body section so as to be opened and closed relative to said sheet pressuring opening, said sheet protecting member covering said sheet pressurizing opening portion.
  • 5. The printing liquids and sheets container according to claim 4, wherein said sheet protecting member is supported in said sheet accommodating section of said case main body section so as to be opened and closed relative to said sheet pressurizing opening portion and is automatically shifted from a closed state to a substantially open state in response to an operation of installing said case main body section.
  • 6. The printing liquids and sheets container according to claim 4, wherein said sheet protecting member is supported in said sheet accommodating section of said case main body section so as to be opened and closed relative to said sheet pressurizing opening portion and is automatically shifted from a substantially open state to a closed state in response to an operation of removing said case main body section.
  • 7. A printing liquids and sheets container comprising:a case main body section removably disposed in a conveying mechanism forming section for conveying sheets to a printing section that performs a printing operation on printing surfaces of said sheets using printing liquids; a sheet accommodating section formed in said case main body section to accommodate said sheets; a liquid accommodating section formed in said case main body section to accommodate said liquids; and sheet separating means provided at an end of said sheet discharging section of said sheet accommodating section for separating said sheets discharged from said sheet accommodating section, one by one to sequentially discharge the same, said sheet separating means being formed of a separating surface facing said sheet discharging section and forming a predetermined angle relative to a wall surface against which ends of said sheets abut.
  • 8. The printing liquids and sheets container according to claim 7, wherein said separating surface is set depending on rigidity of said sheets accommodated in said sheet accommodating section.
  • 9. A printing liquids and sheets container comprising:an accommodation section removably disposed in a conveying mechanism forming section for conveying sheets to a printing section that performs a printing operation on printing surfaces of said sheets using printing liquids, said accommodation section housing said sheets and said liquids; an opening portion through which said sheets are discharged from said accommodation section; and a feeding roller disposed in said conveying mechanism forming section, for taking out and discharging said sheets through said opening portion.
  • 10. The printing liquids and sheets container according to claim 9, wherein separating means for separating said sheets in said accommodation section one by one to discharge the same through said opening portion is provided around a peripheral portion of said opening in said portable container.
  • 11. The printing liquids and sheets container according to claim 9, wherein said sheets accommodated in said accommodation section of said container are stacked on a plate-like member having a friction coefficient substantially the same as or smaller than that of said sheets.
  • 12. The printing liquids and sheets container according to claim 9, further comprising a cover member disposed in said case main body section so as to be opened and closed relative to said sheet discharging opening portion, to selectively cover said sheet discharging opening.
Parent Case Info

This application is a division of application Ser. No. 09/773,501, filed Feb. 2, 2001 now U.S. Pat. No. 6,471,345.

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6149256 McIntyre et al. Nov 2000 A
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Entry
Office Action, dated Nov. 21, 2003, in JP 2000-026109.
Office Action, dated Nov. 21, 2003, in JP 2000-026115.