Patent Application
20100277542
This invention relates in general terms to Inkjet printers and more particularly to a mechanism for and a method of capping a pagewidth printhead assembly for an Inkjet printer. By “pagewidth” printhead assembly is meant one having a printhead which has a length which extends across substantially the full width of (paper, card, textile or other) media to be printed and which, whilst remaining in a stationary position, is controlled to deposit printing ink across the full print width of advancing print media.
The following applications have been filed by the Applicant with the present application:
The disclosures of these co-pending applications are incorporated herein by reference.
The following patents or patent applications filed by the applicant or assignee of the present invention are hereby incorporated by cross-reference.
Inkjet printers have a series of nozzles from which individual ink droplets are ejected to deposit on print media to form desired printed images. The nozzles are incorporated in various types of print heads and their proper functioning is critical to the creation of quality images. Thus, any partial or total blockage of even a single nozzle may have a significant impact on a printed image, particularly in the case of a pagewidth printer.
The nozzles are prone to blockage due to their exposure to ever-present paper dust and other particulate matter and due to the tendency of ink to dry in the nozzles during, often very short, idle periods. That is, ink which is awaiting delivery from a nozzle forms a meniscus at the nozzle mouth and, when exposed to air, the ink solvent is evaporated to leave a nozzle blocking deposit.
Servicing systems are conventionally employed for maintaining the functionality of print heads, such systems providing one or more of the functions of capping, purging and wiping. Capping involves the covering of idle nozzles to preclude exposure of ink to drying air. Purging is normally effected by evacuating a capping chamber, thereby sucking deposits from the printhead that block or have the potential to block the nozzles. Wiping is performed in conjunction with the capping and/or purging functions and involves gently sweeping a membrane across the face of the printhead.
The majority of conventional Inkjet printers employ a reciprocating carriage which carries a printhead (often in the form of a cartridge) and which is driven to traverse across the width of a momentarily stationary page or portion of print media. In these printers, service stations are provided at one side of the printing zone and, on command, the printhead is traversed to the service station where it is docked for such time as servicing is performed and/or the printer is idle.
The above described servicing system cannot feasibly be employed in relation to pagewidth printers which, as above mentioned, have a stationary print head assembly that extends across the full width of the printing zone. The printhead assembly effectively defines the print zone and it cannot be moved outside of that zone for servicing. Furthermore, a pagewidth printhead has a significantly larger surface area and contains a vastly greater number of nozzles than a conventional Inkjet printhead, especially in the case of a large format printer, all of which dictate an entirely different servicing approach from that which has conventionally been adopted.
In a first aspect the present invention provides a printer comprising:
(a) a pagewidth print head assembly having—
(b) a capping mechanism having—
Optionally at least one capping member is formed effectively as a one-piece member.
Optionally the at least one capping member comprises conjoined capping member portions having an aggregate length corresponding substantially to that of the at least one print head.
Optionally the at least one capping member comprises a body portion formed from a rigid material and a capping portion having a) an integrally formed elastomeric material lip portion and b) a cavity surrounded by the lip portion, and wherein the lip portion is peripherally configured to surround the nozzles collectively.
Optionally the print heads are disposed in confronting relationship when in the first position.
In a further aspect the present invention provides printer comprising:
Optionally each of the capping members is formed effectively as a one-piece member.
Optionally each of the capping members comprises conjoined capping member portions having an aggregate length corresponding substantially to that of the respective print heads.
Optionally each of the capping members comprises a body portion formed from a rigid material and a capping portion having a) an integrally formed elastomeric material lip portion and b) a cavity surrounded by the lip portion, and wherein the lip portion is peripherally configured to surround the nozzles collectively.
Optionally the print heads are disposed in confronting relationship when in the first position.
In a further aspect there is provided a printer wherein:
In a further aspect there is provided a printer, wherein:
In a further aspect there is provided a printer, wherein:
In a further aspect there is provided a printer, wherein:
In a further aspect there is provided a printer, wherein:
In a further aspect there is provided a printer, wherein: the pagewidth print head assembly has a single pagewidth print head;
In a further aspect there is provided a printer, wherein the second actuating mechanism is arranged to move the at least one capping member in an arcuate second direction opposite to that of the first direction to effect nozzle capping engagement of the at least one print head when the at least one print head is in the second position.
In a further aspect there is provided a printer, wherein:
In a further aspect there is provided a printer, wherein the capping mechanism has:
In a further aspect there is provided a printer, wherein the capping mechanism has:
In a further aspect there is provided a printer, wherein the capping mechanism has:
In a further aspect there is provided a printer, wherein:
In a further aspect there is provided a printer, wherein the capping member is formed from a flexible sheet-like material and has a width corresponding substantially to the length of the at least one print head, the flexible sheet-like material being provided as a replaceable roll from which a portion of the material is in use drawn to locate, as the capping member, in nozzle capping engagement with the at least one print head.
In a further aspect there is provided a printer, wherein:
In a further aspect there is provided a printer, wherein the capping member comprises:
In a second aspect the present invention provides a printer comprising:
(a) a pagewidth print head assembly having—
(b) a capping mechanism having—
Optionally the at least one capping member is formed effectively as a one-piece member.
Optionally the at least one capping member comprises conjoined capping member portions having an aggregate length corresponding substantially to that of the at least one print head.
Optionally the at least one capping member comprises a body portion formed from a rigid material and a capping portion having a) an integrally formed elastomeric material lip portion and b) a cavity surrounded by the lip portion, and wherein the lip portion is peripherally configured to surround the nozzles collectively.
Optionally the print heads are disposed in confronting relationship when in the first position.
In a further aspect there is provided a printer comprising:
Optionally each of the capping members is formed effectively as a one-piece member.
Optionally each of the capping members comprises conjoined capping member portions having an aggregate length corresponding substantially to that of the respective print heads.
Optionally each of the capping members is formed from an elastomeric material and has a body portion, an integrally formed lip portion and a cavity surrounded by the lip portion, and wherein the lip portion is peripherally configured to surround the nozzles collectively.
Optionally the print heads are disposed in confronting relationship when in the first position.
In a further aspect there is provided a printer, wherein:
In a further aspect there is provided a printer, wherein:
In a further aspect there is provided a printer, wherein:
In a further aspect there is provided a printer, wherein:
In a further aspect there is provided a printer, wherein:
In a further aspect there is provided a printer, wherein:
In a further aspect there is provided a printer, wherein the second actuating mechanism is arranged to move the at least one capping member in an arcuate second direction opposite to that of the first direction to effect nozzle capping engagement of the at least one print head when the at least one print head is in the second position.
In a further aspect there is provided a printer, wherein:
In a further aspect there is provided a printer, wherein the capping mechanism has:
In a further aspect there is provided a printer, wherein the capping mechanism has:
In a further aspect there is provided a printer, wherein the capping mechanism has:
In a further aspect there is provided a printer, wherein:
In a further aspect there is provided a printer, wherein the capping member is formed from a flexible sheet-like material and has a width corresponding substantially to the length of the at least one print head, the flexible sheet-like material being provided as a replaceable roll from which a portion of the material is in use drawn to locate, as the capping member, in nozzle capping engagement with the at least one print head.
In a further aspect there is provided a printer, wherein:
In a further aspect there is provided a printer, wherein the capping member comprises:
In a third aspect there is provided a printer comprising:
Optionally the second actuating mechanism is arranged to effect rectilinear movement of the capping member in a lateral direction, relative to the print heads, when moving the capping member from the location adjacent the print heads to the position at which the capping member is interposed between the print heads.
Optionally the capping member has two oppositely directed capping portions, respective ones of which are arranged to engage in nozzle capping engagement with respective ones of the print heads when in the second position.
Optionally the capping member comprises a body portion formed from a rigid material and on which the capping portions are located, wherein each capping portion has a) an integrally formed elastomeric material lip portion and b) a cavity surrounded by the lip portion, and wherein the lip portion is peripherally configured to surround the nozzles collectively on the respective print heads.
and wherein the lip portion is peripherally configured to surround the nozzles collectively on the respective print heads.
Optionally the capping member is formed effectively as a one-piece member.
Optionally wherein the print heads are disposed in confronting relationship when in the first position.
In a further aspect there is provided a printer, wherein:
In a further aspect there is provided a printer, wherein:
In a further aspect there is provided a printer, wherein:
In a further aspect there is provided a printer, wherein:
In a further aspect there is provided a printer, wherein:
In a further aspect there is provided a printer, wherein the capping mechanism has:
In a further aspect there is provided a printer, wherein the capping mechanism has:
In a further aspect there is provided a printer, wherein the capping mechanism has:
In a further aspect there is provided a printer, wherein:
Optionally the capping member is formed from a flexible sheet-like material and has a width corresponding substantially to the length of the print head, the flexible sheet-like material being provided as a replaceable roll from which a portion of the material is in use drawn to locate, as the capping member, in nozzle capping engagement with the print head.
In a further aspect there is provided a printer, wherein:
In a further aspect there is provided a printer, wherein the capping member comprises:
In a fourth aspect the present invention provides a printer comprising:
(a) a pagewidth print head assembly having—
(b) a capping mechanism having—
Optionally the actuating mechanism
Optionally the capping member when
Optionally the capping member comprises a body portion formed from a rigid material and a capping portion having
a) an integrally formed elastomeric material lip portion and
b) a cavity surrounded by the lip portion, and wherein the lip portion is peripherally configured to surround the print head nozzles.
Optionally the capping member is formed effectively as a one-piece member.
Optionally the capping mechanism further has:
Optionally the capping mechanism further has:
Optionally the capping mechanism further has purging means associated with the capping member and arranged to receive material that is purged from the nozzle environment of the print head.
Optionally in the capping mechanism has:
Optionally the capping mechanism has:
In a further aspect there is provided a printer, wherein:
In a further aspect there is provided a printer, wherein the capping member is formed from a flexible sheet-like material and has a width corresponding substantially to the length of the print head, the flexible sheet-like material being provided as a replaceable roll from which a portion of the material is in use drawn to locate, as the capping member, in nozzle capping engagement with the print head.
In a further aspect there is provided a printer, wherein:
In a further aspect there is provided a printer, wherein the capping member comprises:
In a fifth aspect the present invention provides a printer comprising:
In a further aspect there is provided a printer comprising:
Optionally the capping member when in the first position is located in spaced-apart confronting relationship to the print head.
Optionally the actuating mechanism is arranged to effect linear transitioning of the capping member from the first position to the second position.
Optionally the purging means includes a suction device that is arranged to suck purged material from the nozzle environment of the print head.
Optionally the capping member is formed with
a) an elastomeric material a lip portion and
b) a cavity surrounded by the lip portion,
and wherein the lip portion is peripherally configured to surround the print head nozzles.
Optionally the capping member is formed effectively as a one-piece member.
Optionally a chamber is located within the capping member and is connected in fluid passage communication with the cavity, and wherein the chamber is arranged to be connected to a suction device whereby material may be sucked from the nozzle environment of the print head.
Optionally the actuating mechanism is arranged to effect transitioning of the capping member in a direction normal to the direction of transport of print media past the print head.
Optionally the capping member when in the first position is located below the print head and wherein the capping member is raised from the first position to the second position to effect nozzle capping engagement of the print head.
In a further aspect there is provided a printer, wherein the capping/purging mechanism further has:
In a further aspect there is provided a printer, wherein the capping/purging mechanism further has:
In a further aspect there is provided a printer, wherein:
In a further aspect there is provided a printer, wherein:
In a further aspect there is provided a printer, wherein:
In a further aspect there is provided a printer, wherein:
In a further aspect there is provided a printer, wherein:
In a further aspect there is provided a printer, wherein the capping/purging mechanism further has:
In a further aspect there is provided a printer, wherein the capping/purging mechanism further has:
In a further aspect there is provided a printer, wherein the capping/purging mechanism has:
In a further aspect there is provided a printer, wherein the capping/purging mechanism has:
In a further aspect there is provided a printer, wherein the capping/purging mechanism has:
In a further aspect there is provided a printer, wherein:
In a further aspect there is provided a printer, wherein the capping member is formed from a flexible sheet-like material and has a width corresponding substantially to the length of the at least one print head, the flexible sheet-like material being provided as a replaceable roll from which a portion of the material is in use drawn to locate, as the capping member, in nozzle capping engagement with the at least one print head.
In a further aspect there is provided a printer, wherein:
In a further aspect there is provided a printer, wherein the capping member comprises:
In a sixth aspect the present invention provides a printer comprising:
Optionally the print heads are orientated in mutually opposite directions and are arranged to deliver ink onto opposite faces of print media as it is transported between the print heads
Optionally the capping members when in the first position are located in vertical spaced relationship to the respective print heads and are located one at each side of the plane of print media feed through the printer.
Optionally the respective actuating mechanisms are arranged to effect transitioning of the associated capping members in a direction normal to the direction of transport of print media past the respective print heads.
Optionally each said capping member comprises
a) an elastomeric material lip portion and
b) a cavity surrounded by the lip portion,
Optionally each said capping member is formed effectively as a one-piece member.
In a further aspect there is provided a printer, wherein the capping mechanism further has:
In a further aspect there is provided a printer, wherein the capping mechanism further has:
In a further aspect there is provided a printer, wherein the capping mechanism further has purging means associated with the capping member and arranged to receive material that is purged from the nozzle environment of the print head.
In a further aspect there is provided a printer, wherein the capping mechanism further has:
In a further aspect there is provided a printer, wherein the capping mechanism further has:
In a further aspect there is provided a printer, wherein the capping mechanism has:
In a further aspect there is provided a printer, wherein the capping mechanism has:
In a further aspect there is provided a printer, wherein the capping mechanism has:
In a further aspect there is provided a printer, wherein:
In a further aspect there is provided a printer, wherein the capping member is formed from a flexible sheet-like material and has a width corresponding substantially to the length of the print head, the flexible sheet-like material being provided as a replaceable roll from which a portion of the material is in use drawn to locate, as the capping member, in nozzle capping engagement with the print head.
In a further aspect there is provided a printer, wherein:
In a further aspect there is provided a printer, wherein the capping member comprises:
In a seventh aspect the present invention provides a printer comprising:
Optionally the actuating mechanism is arranged to effect transitioning of the capping member in a direction approximately normal to the direction of transport of print media past the print head.
Optionally the capping member when in the first position is located below the print head and wherein the capping member is raised in the arcuate direction from the first position to the second position to effect nozzle capping engagement of the print head.
Optionally the capping member comprises:
Optionally the capping member is formed effectively as a one-piece member.
Optionally the capping mechanism further has:
In a further aspect there is provided a printer, wherein the capping mechanism further has:
In a further aspect there is provided a printer, wherein:
In a further aspect there is provided a printer, wherein:
In a further aspect there is provided a printer, wherein the capping mechanism further has:
In a further aspect there is provided a printer, wherein the capping mechanism further has:
In a further aspect there is provided a printer, wherein the capping mechanism has:
In a further aspect there is provided a printer, wherein the capping mechanism has:
In a further aspect there is provided a printer, wherein the capping mechanism has:
In a further aspect there is provided a printer, wherein:
In a further aspect there is provided a printer, wherein the capping member is formed from a flexible sheet-like material and has a width corresponding substantially to the length of the print head, the flexible sheet-like material being provided as a replaceable roll from which a portion of the material is in use drawn to locate, as the capping member, in nozzle capping engagement with the print head.
In a further aspect there is provided a printer, wherein:
In a further aspect there is provided a printer wherein the capping member comprises:
In an eighth aspect the present invention provides a printer comprising:
Optionally the capping member when in the first position is located in spaced-apart substantially confronting relationship to the print head.
Optionally the purging means includes a suction device that is arranged to suck purged material from the nozzle environment of the print head.
Optionally the capping member comprises
a) an elastomeric material a lip portion and
b) a cavity surrounded by the lip portion, and wherein the lip portion is peripherally configured to surround the print head nozzles.
Optionally the capping member is formed effectively as a one-piece member.
Optionally a chamber is located within the capping member and is connected in fluid passage communication with the cavity, and wherein the chamber is arranged to be connected to a suction device whereby material may be sucked from the nozzle environment of the print head.
Optionally the actuating mechanism is arranged to effect transitioning of the capping member in a direction approximately normal to the direction of transport of print media past the print head.
In a further aspect there is provided a printer wherein the capping member when in the first position is located below the print head and wherein the capping member is raised in the arcuate direction from the first position to the second position to effect nozzle capping engagement of the print head.
In a further aspect there is provided a printer, wherein the capping/purging mechanism further has:
In a further aspect there is provided a printer, wherein the capping/purging mechanism further has:
In a further aspect there is provided a printer, wherein the capping member is located in the non-capping first position spaced-apart from the print head.
In a further aspect there is provided a printer, wherein the capping/purging mechanism further has:
In a further aspect there is provided a printer, wherein the capping/purging mechanism further has:
In a further aspect there is provided a printer, wherein the capping/purging mechanism has:
In a further aspect there is provided a printer, wherein the capping/purging mechanism has:
In a further aspect there is provided a printer, wherein the capping/purging mechanism has:
In a further aspect there is provided a printer, wherein:
In a further aspect there is provided a printer, wherein the capping member is formed from a flexible sheet-like material and has a width corresponding substantially to the length of the print head, the flexible sheet-like material being provided as a replaceable roll from which a portion of the material is in use drawn to locate, as the capping member, in nozzle capping engagement with the print head.
In a further aspect there is provided a printer, wherein:
In a further aspect there is provided a printer, wherein the capping member comprises:
In a ninth aspect the present invention provides a printer comprising:
(a) a pagewidth print head assembly having—
(b) a capping mechanism having—
Optionally the at least one capping member is formed effectively as a one-piece member.
Optionally the at least one capping member comprises conjoined capping member portions having an aggregate length corresponding substantially to that of the at least one print head.
Optionally wherein the at least one capping member comprises a body portion formed from a rigid material and a capping portion having a) an integrally formed elastomeric material lip portion and b) a cavity surrounded by the lip portion, and wherein the lip portion is peripherally configured to surround the nozzles collectively.
Optionally the print heads are disposed in confronting relationship when in the first position.
In a further aspect there is provided a printer comprising:
Optionally each of the capping members is formed effectively as a one-piece member.
Optionally each of the capping members comprises conjoined capping member portions having an aggregate length corresponding substantially to that of the respective print heads.
Optionally each of the capping members comprises a body portion formed from a rigid material and a capping portion having a) an integrally formed elastomeric material lip portion and b) a cavity surrounded by the lip portion, and wherein the lip portion is peripherally configured to surround the nozzles collectively.
Optionally the print heads are disposed in confronting relationship when in the first position.
Optionally the second actuating mechanism is arranged to move the at least one capping member in a direction normal to the at least one print head to effect nozzle capping engagement of the at least one print head when the at least one print head is in the second position.
Optionally the second actuating mechanism is arranged to move the at least one capping member in a lateral direction relative to the at least one print head to effect nozzle capping engagement of the at least one print head when the at least one print head is in the second position.
In a further aspect there is provided a printer, wherein:
In a further aspect there is provided a printer, wherein:
In a further aspect there is provided a printer, wherein:
In a further aspect there is provided a printer, wherein:
In a further aspect there is provided a printer, wherein:
In a further aspect there is provided a printer, wherein:
In a further aspect there is provided a printer, wherein the capping mechanism has:
In a further aspect there is provided a printer, wherein the capping mechanism has:
In a further aspect there is provided a printer, wherein the capping mechanism has:
In a further aspect there is provided a printer, wherein:
In a further aspect there is provided a printer, wherein the capping member is formed from a flexible sheet-like material and has a width corresponding substantially to the length of the at least one print head, the flexible sheet-like material being provided as a replaceable roll from which a portion of the material is in use drawn to locate, as the capping member, in nozzle capping engagement with the at least one print head.
In a further aspect there is provided a printer, wherein:
In a further aspect there is provided a printer, wherein the capping member comprises:
In a tenth aspect the present invention provides a printer comprising:
(a) a pagewidth print head assembly having—
(b) a capping/purging mechanism having—
Optionally the at least one capping/purging member is formed effectively as a one-piece member.
Optionally the at least one capping/purging member comprises conjoined member portions having an aggregate length corresponding substantially to that of the at least one print head.
Optionally the at least one capping/purging member comprises a body portion, a lip portion formed from an elastomeric material, a capping cavity surrounded by the lip portion, a purging chamber also surrounded by the lip portion, and wherein the lip portion is peripherally configured to surround the print head nozzles.
Optionally the capping cavity and the purging chamber form integral portions of the capping/purging member.
Optionally the purging chamber in the at least one capping/purging member is connected to a suction device.
Optionally the purging chamber is connected to the suction device by a way of an extractor tube.
Optionally the print heads are disposed in confronting relationship when in the first position.
In a further aspect there is provided a printer comprising:
Optionally each said capping/purging member is formed effectively as a one-piece member.
Optionally each said capping/purging member comprises conjoined capping member portions having an aggregate length corresponding substantially to that of each of the print heads.
Optionally each said capping/purging member has a body portion, a lip portion formed from an elastomeric material, a capping cavity surrounded by the lip portion, a purging chamber also surrounded by the lip portion, and wherein the lip portion is peripherally configured to surround the print head nozzles.
Optionally the capping cavity and the purging chamber form integral portions of the capping/purging member.
Optionally the purging chamber in each said capping/purging member is connected to a suction device.
Optionally the purging chamber is connected to the suction device by a way of an extractor tube.
Optionally the print heads are disposed in confronting relationship when in the first position.
Optionally the second actuating mechanism is arranged to move the at least one capping/purging member in a direction normal to the at least one print head to effect nozzle capping engagement of the at least one print head when the at least one print head is in the second position.
Optionally the second actuating mechanism is arranged to move the at least one capping/purging member in a lateral direction relative to the at least one print head to effect nozzle capping engagement of the at least one print head when the at least one print head is in the second position.
In a further aspect there is provided a printer, wherein:
In a further aspect there is provided a printer, wherein:
In a further aspect there is provided a printer, wherein:
In a further aspect there is provided a printer, wherein:
In a further aspect there is provided a printer, wherein:
In a further aspect there is provided a printer, wherein the capping/purging mechanism has:
In a further aspect there is provided a printer, wherein the capping/purging mechanism has:
In a further aspect there is provided a printer, wherein the capping/purging mechanism has:
In a further aspect there is provided a printer, wherein:
In a further aspect there is provided a printer, wherein the capping/purging member is formed from a flexible sheet-like material and has a width corresponding substantially to the length of the at least one print head, the flexible sheet-like material being provided as a replaceable roll from which a portion of the material is in use drawn to locate, as the capping/purging member, in nozzle capping engagement with the at least one print head.
In a further aspect there is provided a printer, wherein:
In a further aspect there is provided a printer, wherein the capping/purging member comprises:
In an eleventh aspect the present invention provides a printer comprising:
(a) a pagewidth print head assembly having—
(b) a capping/purging mechanism associated with the at least one print head and comprising—
Optionally a longitudinally extending platen also is carried by the turret and wherein the first actuating mechanism is arranged to effect rotation of the turret to a position at which the platen is located in aligned spaced-apart relationship with the at least one print head.
In a further aspect there is provided a printer comprising:
(a) a pagewidth print head assembly having—
(b) a capping/purging mechanism associated with the print head and comprising—
Optionally a longitudinally extending platen also is carried by the turret and wherein the first actuating mechanism is arranged to effect rotation of the turret to a position at which the platen is located in aligned spaced-apart relationship with the print head.
Optionally the capping member is formed effectively as a one-piece member and has a length corresponding substantially to that of the print head.
Optionally the capping member comprises conjoined member portions having an aggregate length corresponding substantially to that of the print head.
Optionally the capping member comprises a body portion, a lip portion formed from an elastomeric material and a cavity surrounded by the lip portion, and wherein the lip portion is peripherally configured to surround the print head nozzles.
Optionally the purging chamber comprises a longitudinally extending member and has a length corresponding substantially to that of the print head.
Optionally the purging chamber comprises conjoined member portions having an aggregate length corresponding substantially to that of the print head.
Optionally the purging chamber comprises a body portion, a lip portion formed from an elastomeric material and a cavity surrounded by the lip portion, and wherein the lip portion is peripherally configured to surround the print head nozzles.
Optionally the turret has a generally triangular cross-section and wherein the platen, the capping member and the purging chamber are located on respective sides of the turret.
In a further aspect there is provided a printer, wherein the capping/purging mechanism has:
In a further aspect there is provided a printer, wherein the capping/purging mechanism has:
In a further aspect there is provided a printer, wherein:
In a further aspect there is provided a printer, wherein:
In a further aspect there is provided a printer, wherein the capping/purging mechanism has:
In a further aspect there is provided a printer, wherein:
In a further aspect there is provided a printer, wherein:
In a further aspect there is provided a printer, wherein:
In a further aspect there is provided a printer, wherein the capping/purging mechanism has:
In a further aspect there is provided a printer, wherein the capping/purging mechanism has:
In a further aspect there is provided a printer, wherein the second actuating mechanism is arranged to effect rotation of the turret to move the capping member from a non-capping first position to a second position at which the capping member is located in nozzle capping engagement with the at least one print head.
In a further aspect there is provided a printer, wherein the capping/purging mechanism has:
In a further aspect there is provided a printer, wherein the capping/purging mechanism has:
In a further aspect there is provided a printer, wherein the capping/purging mechanism has a capping member formed from a flexible sheet-like material and having a width corresponding substantially to the length of the at least one print head, the flexible sheet-like material being provided as a replaceable roll from which a portion of the material is in use drawn to locate, as the capping member, in nozzle capping engagement with the at least one print head.
In a further aspect there is provided a printer, wherein the capping/purging mechanism has:
In a further aspect there is provided a printer, wherein the capping member comprises:
In a twelfth aspect the present invention provides a printer comprising:
(a) a pagewidth print head assembly having—
(b) a capping mechanism associated with the at least one print head and comprising—
Optionally the turret incorporates a purging chamber which is aligned with the print head nozzles when the capping member is in the first position.
In a further aspect there is provided a printer comprising:
(a) a pagewidth print head assembly having—
(b) a capping mechanism associated with the print head and comprising—
Optionally the turret incorporates a purging chamber which is aligned with the print head nozzles when the capping member is in the first position.
Optionally the turret has a longitudinally extending substantially flat land portion that locates adjacent the print head when the capping member is in the non-capping first position.
Optionally the capping member is carried by an eccentric land portion of the turret.
Optionally the purging chamber is located interiorly of the turret.
Optionally the purging chamber opens to the flat land portion of the turret by way of a port.
Optionally the purging chamber is connected to a suction device.
Optionally the flat land portion of the turret effectively forms a platen when the capping member is in the first position.
Optionally the capping member is formed effectively as a one-piece member and has a length corresponding substantially to that of the print head.
Optionally the capping member comprises a body portion, a lip portion formed from an elastomeric material and a cavity surrounded by the lip portion, and wherein the lip portion is peripherally configured to surround the print head nozzles.
Optionally the capping member comprises conjoined member portions having an aggregate length corresponding substantially to that of the print head.
Optionally the capping member is carried by an eccentric land portion of the turret.
In a further aspect there is provided a printer, wherein the capping mechanism has:
In a further aspect there is provided a printer, wherein the capping mechanism has:
In a further aspect there is provided a printer, wherein:
In a further aspect there is provided a printer, wherein:
In a further aspect there is provided a printer, wherein the capping mechanism has:
In a further aspect there is provided a printer, wherein:
In a further aspect there is provided a printer, wherein:
In a further aspect there is provided a printer, wherein:
In a further aspect there is provided a printer, wherein the capping mechanism has:
In a further aspect there is provided a printer, wherein the capping mechanism has:
In a further aspect there is provided a printer, wherein the capping mechanism has:
In a further aspect there is provided a printer, wherein the capping mechanism has:
In a further aspect there is provided a printer, wherein the capping mechanism has:
In a further aspect there is provided a printer, wherein the capping mechanism has a capping member formed from a flexible sheet-like material and having a width corresponding substantially to the length of the at least one print head, the flexible sheet-like material being provided as a replaceable roll from which a portion of the material is in use drawn to locate, as the capping member, in nozzle capping engagement with the at least one print head.
In a further aspect there is provided a printer, wherein the capping mechanism has:
In a further aspect there is provided a printer, wherein the capping member comprises:
In a thirteenth aspect the present invention provides a printer comprising:
Optionally the carrier incorporates a purging chamber into which material may be purged from the print head nozzles.
In a further aspect there is provided a printer comprising:
Optionally the carrier incorporates a purging chamber into which material may be purged from the print head nozzles.
Optionally the purging chamber is connected to a suction device.
Optionally the carrier is positioned in confronting relationship to the print head and is spaced from the print head to form a lower margin of a passage for print media that, in use, is transported past the print head
Optionally the capping member comprises a body portion, a lip portion formed from an elastomeric material and a cavity surrounded by the lip portion, and wherein the lip portion is peripherally configured to surround the print head nozzles.
In a further aspect there is provided a printer, wherein the capping mechanism has:
In a further aspect there is provided a printer, wherein the capping mechanism has:
In a further aspect there is provided a printer, wherein:
In a further aspect there is provided a printer, wherein:
In a further aspect there is provided a printer, wherein the capping mechanism has:
In a further aspect there is provided a printer, wherein:
In a further aspect there is provided a printer, wherein:
In a further aspect there is provided a printer, wherein:
In a further aspect there is provided a printer, wherein the capping mechanism has:
In a further aspect there is provided a printer, wherein the capping mechanism has:
In a further aspect there is provided a printer, wherein the capping mechanism has:
In a further aspect there is provided a printer, wherein the capping mechanism has:
In a further aspect there is provided a printer, wherein the capping mechanism has:
In a further aspect there is provided a printer, wherein the capping mechanism has a capping member formed from a flexible sheet-like material and having a width corresponding substantially to the length of the at least one print head, the flexible sheet-like material being provided as a replaceable roll from which a portion of the material is in use drawn to locate, as the capping member, in nozzle capping engagement with the at least one print head.
In a further aspect there is provided a printer, wherein the capping mechanism has:
In a further aspect there is provided a printer, wherein the capping member comprises:
In a fourteenth aspect the present invention provides a printer comprising:
(a) a pagewidth print head assembly having—
(i) at least one pagewidth print head and
(ii) a plurality of nozzles located along the at least one print head and arranged in use to deliver ink onto print media as it is transported past the at least one print head, and
(b) a capping mechanism associated with the at least one print head and comprising-
i) a capping member formed from a flexible sheet-like material and having a width corresponding substantially to the length of the at least one print head, and
ii) an actuating mechanism arranged to effect relative movement of the capping member and the at least one print head to a position at which the capping member is located in nozzle capping engagement with the at least one print head.
In a further aspect the present invention provides a printer comprising:
(a) a pagewidth print head assembly having—
(i) at least one pagewidth print head and
(ii) a plurality of nozzles located along the at least one print head and arranged in use to deliver ink onto print media as it is transported past the at least one print head, and
(b) a capping mechanism associated with the at least one print head and comprising-
i) a capping member formed from a flexible sheet-like material and having a width corresponding substantially to the length of the at least one print head, and
ii) an actuating mechanism arranged to position the capping member in nozzle capping engagement with the at least one print head.
In a further aspect the present invention provides printer comprising:
(a) a pagewidth print head assembly having—
(i) two pagewidth print heads and
(ii) a plurality of nozzles located along each of the print heads and arranged in use to deliver ink onto print media as it is transported between the print heads, and
(b) a capping mechanism associated with the print heads and comprising-
i) a capping member formed from a flexible sheet-like material and having a width corresponding substantially to the length of the print heads, and
ii) an actuating mechanism arranged to position the capping member between the two print heads and in nozzle capping engagement with the print heads.
Optionally the capping member comprises a single layer sheet-like material.
Optionally the capping member comprises a multi-layer sheet-like material.
Optionally the capping member comprises a compressible sheet-like material.
Optionally fluid delivery means are provided for delivering a fluid to a region between the multiple layers of the capping member.
Optionally the capping member is formed from a sheet-like material having hydrophobic properties.
Optionally the capping member is formed from a closed cell thermoplastics material.
Optionally the capping member is formed from a sheet-like material having hydrophilic properties.
Optionally the capping member is formed from an open cell silicone material.
In a further aspect there is provided a printer, wherein the capping mechanism has:
In a further aspect there is provided a printer, wherein the capping mechanism has:
In a further aspect there is provided a printer, wherein:
In a further aspect there is provided a printer, wherein:
In a further aspect there is provided a printer, wherein:
In a further aspect there is provided a printer, wherein:
In a further aspect there is provided a printer, wherein:
In a further aspect there is provided a printer, wherein:
In a further aspect there is provided a printer, wherein the capping mechanism has:
In a further aspect there is provided a printer, wherein the capping mechanism has:
In a further aspect there is provided a printer, wherein the capping mechanism has:
In a further aspect there is provided a printer, wherein the capping mechanism has:
In a further aspect there is provided a printer, wherein the capping mechanism has:
In a further aspect there is provided a printer, wherein the flexible sheet-like material is provided as a replaceable roll from which a portion of the material is in use drawn to locate, as the capping member, in nozzle capping engagement with the at least one print head.
In a further aspect there is provided a printer, wherein:
In a further aspect there is provided a printer, wherein the capping member comprises:
In a fifteenth aspect the present invention provides a printer comprising:
(a) a pagewidth print head assembly having—
(i) at least one pagewidth print head and
(ii) a plurality of nozzles located along the at least one print head and arranged in use to deliver ink onto print media as it is transported past the at least one print head, and
(b) a capping mechanism associated with the at least one print head and comprising a capping member formed from a flexible sheet-like material and having a width corresponding substantially to the length of the at least one print head, the flexible sheet-like material being provided as a replaceable roll from which a portion of the material is in use drawn to locate, as the capping member, in nozzle capping engagement with the at least one print head.
Optionally the capping member comprises a single layer sheet-like material.
Optionally the capping member comprises a multi-layer sheet-like material.
Optionally the capping member comprises a compressible sheet-like material.
Optionally the capping member is formed from a sheet-like material having hydrophobic properties.
Optionally the capping member is formed from a closed cell thermoplastics material.
Optionally the capping member is formed from a sheet-like material having hydrophilic properties.
Optionally the capping member is formed from an open cell silicone material.
Optionally a cutter mechanism is provided for selectively cutting the portion of the material from the replaceable roll.
In a further aspect there is provided a printer comprising:
(a) a pagewidth print head assembly having—
(i) a pagewidth print head and
(ii) a plurality of nozzles located along the print head and arranged in use to deliver ink onto print media as it is transported past the print head, and
(b) a capping mechanism associated with the print head and comprising-
(i) a capping member formed from a flexible sheet-like material and having a width corresponding substantially to the length of the print head, the flexible sheet-like material being provided as a replaceable roll from which a portion of the material is in use drawn to form the capping member, and
ii) a platen positioned adjacent the print head and arranged to engage with and position the capping member in nozzle capping engagement with the print head.
Optionally the capping member comprises a single layer sheet-like material.
Optionally the capping member comprises a multi-layer sheet-like material.
Optionally the capping member comprises a compressible sheet-like material.
Optionally the capping member is formed from a sheet-like material having hydrophobic properties.
Optionally the capping member is formed from a closed cell thermoplastics material.
Optionally the capping member is formed from a sheet-like material having hydrophilic properties.
Optionally the capping member is formed from an open cell silicone material.
Optionally a cutter mechanism is provided for selectively cutting the portion of the material from the replaceable roll.
Optionally an actuating mechanism is provided to effect movement of the platen whereby it causes the capping member to move into nozzle capping engagement with the print head.
In a further aspect there is provided a printer, wherein the capping mechanism has a first actuating mechanism arranged to move the at least one print head in an arcuate direction from a first to a second position, and
In a further aspect there is provided a printer, wherein the capping mechanism has:
In a further aspect there is provided a printer, wherein:
In a further aspect there is provided a printer, wherein:
In a further aspect there is provided a printer, wherein:
In a further aspect there is provided a printer, wherein:
In a further aspect there is provided a printer, wherein:
In a further aspect there is provided a printer, wherein:
In a further aspect there is provided a printer, wherein the capping mechanism has:
In a further aspect there is provided a printer, wherein the capping mechanism has:
In a further aspect there is provided a printer, wherein the capping mechanism has:
In a further aspect there is provided a printer, wherein the capping mechanism has:
In a further aspect there is provided a printer, wherein the capping mechanism has:
In a further aspect there is provided a printer, wherein the capping mechanism further has an actuating mechanism arranged to effect relative movement of the capping member and the at least one print head to a position at which the capping member is located in nozzle capping engagement with the at least one print head.
In a further aspect there is provided a printer, wherein the capping mechanism further has a take-up reel arranged to take-up spent capping material following a capping operation.
In a further aspect there is provided a printer, wherein the capping member comprises:
In a sixteenth aspect the present invention provides a printer comprising:
(a) a pagewidth print head assembly having—
(i) at least one pagewidth print head and
(ii) a plurality of nozzles located along the at least one print head and arranged in use to deliver ink onto print media as it is transported past the at least one print head, and
(b) a capping mechanism associated with the at least one print head and comprising-
(i) a capping member formed from a flexible sheet-like material and having a width corresponding substantially to the length of the at least one print head, the flexible sheet-like material being provided as a replaceable roll from which a portion of the material is in use drawn to locate, as the capping member, in nozzle capping engagement with the at least one print head, and
(ii) a take-up reel arranged to take-up spent capping material following a capping operation.
Optionally the capping member comprises a single layer sheet-like material.
Optionally the capping member comprises a multi-layer sheet-like material.
Optionally the capping member comprises a compressible sheet-like material.
Optionally the capping member is formed from a sheet-like material having hydrophobic properties.
Optionally the capping member is formed from a closed cell thermoplastics material.
Optionally the capping member is formed from a sheet-like material having hydrophilic properties.
Optionally the capping member is formed from an open cell silicone material.
In a further aspect there is provided a printer comprising:
(a) a pagewidth print head assembly having—
(i) a pagewidth print head and
(ii) a plurality of nozzles located along the print head and arranged in use to deliver ink onto print media as it is transported past the print head, and
(b) a capping mechanism associated with the print head and comprising-
(i) a capping member formed from a flexible sheet-like material and having a width corresponding substantially to the length of the print head, the flexible sheet-like material being provided as a replaceable roll from which a portion of the material is in use drawn to locate, as the capping member, in nozzle capping engagement with the print head,
ii) a platen positioned adjacent the print head and arranged to engage with and position the capping member in nozzle capping engagement with the print head, and
(iii) a take-up reel arranged to take-up spent capping material following a capping operation, and
Optionally the capping member comprises a single layer sheet-like material.
Optionally the capping member comprises a multi-layer sheet-like material.
Optionally the capping member comprises a compressible sheet-like material.
Optionally the capping member is formed from a sheet-like material having hydrophobic properties.
Optionally the capping member is formed from a closed cell thermoplastics material.
Optionally the capping member is formed from a sheet-like material having hydrophilic properties.
Optionally the capping member is formed from an open cell silicone material.
In a further aspect there is provided a printer, wherein the capping mechanism has:
In a further aspect there is provided a printer, wherein the capping mechanism has:
In a further aspect there is provided a printer, wherein:
In a further aspect there is provided a printer, wherein:
In a further aspect there is provided a printer, wherein:
In a further aspect there is provided a printer, wherein:
In a further aspect there is provided a printer, wherein:
In a further aspect there is provided a printer, wherein:
In a further aspect there is provided a printer, wherein the capping mechanism has:
In a further aspect there is provided a printer, wherein the capping mechanism has:
In a further aspect there is provided a printer, wherein the capping mechanism has:
In a further aspect there is provided a printer, wherein the capping mechanism has:
In a further aspect there is provided a printer, wherein the capping mechanism has:
In a further aspect there is provided a printer, wherein the capping mechanism further has an actuating mechanism arranged to effect relative movement of the capping member and the at least one print head to a position at which the capping member is located in nozzle capping engagement with the at least one print head.
In a further aspect there is provided a printer, wherein the capping member comprises:
In a seventeenth aspect the present invention provides a capping member for a pagewidth print head assembly having—
(i) at least one pagewidth printhead; and
(ii) a plurality of nozzles located along the at least one printhead, the capping member comprising:
a) a lip portion that is formed integrally with a body portion; and
b) a cavity surrounded by the lip portion; wherein, the lip portion is peripherally configured to surround the nozzles on the at least one print head, and the body portion has a length corresponding substantially to that of the at least one printhead.
Optionally the lip portion is formed from an elastomeric material.
Optionally the body portion is formed from a rigid material.
Optionally the body portion is formed from a metal.
Optionally the body portion is formed from a plastics material.
Optionally the body portion and the lip portion are formed as a unitary structure for the full length of the member.
Optionally the capping portion is formed on each of two sides of the body portion.
Optionally a purging chamber is formed within the member.
In a further aspect there is provided a capping member for incorporation in a capping mechanism of a printer comprising the pagewidth print head assembly, wherein:
In a further aspect there is provided a capping member for incorporation in a capping mechanism of a printer comprising the pagewidth print head assembly, wherein:
In a further aspect there is provided a capping member for incorporation in a capping mechanism of a printer comprising the pagewidth print head assembly, wherein:
In a further aspect there is provided a capping member for incorporation in a capping mechanism of a printer comprising the pagewidth print head assembly, wherein:
In a further aspect there is provided a capping member for incorporation in a capping/purging mechanism of a printer comprising the pagewidth print head assembly, wherein:
In a further aspect there is provided a capping member for incorporation in a capping mechanism of a printer comprising the pagewidth print head assembly, wherein:
In a further aspect there is provided a capping member for incorporation in a capping mechanism of a printer comprising the pagewidth print head assembly, wherein:
In a further aspect there is provided a capping member for incorporation in a capping/purging mechanism of a printer comprising the pagewidth print head assembly, wherein:
In a further aspect there is provided a capping member for incorporation in a capping mechanism of a printer comprising the pagewidth print head assembly, wherein:
In a further aspect there is provided a capping member for incorporation in a capping/purging mechanism of a printer comprising the pagewidth print head assembly, wherein:
In a further aspect there is provided a capping member for incorporation in a capping/purging mechanism of a printer comprising the pagewidth print head assembly, the capping/purging mechanism being associated with the at least one print head and comprising a rotatable turret having a longitudinal length corresponding substantially to that of the at least one print head, wherein:
In a further aspect there is provided a capping member for incorporation in a capping mechanism of a printer comprising the pagewidth print head assembly, the capping mechanism being associated with the at least one print head and comprising a rotatable turret having a longitudinal length corresponding substantially to that of the at least one print head, wherein:
In a further aspect there is provided a capping member for incorporation in a capping mechanism of a printer comprising the pagewidth print head assembly, the capping mechanism being associated with the at least one print head and comprising a carrier positioned adjacent the at least one print head and having a longitudinal length corresponding substantially to that of the at least one print head, wherein:
In a further aspect there is provided a capping member for incorporation in a capping mechanism of a printer comprising the pagewidth print head assembly, wherein:
In a further aspect there is provided a capping member for incorporation in a capping mechanism of a printer comprising the pagewidth print head assembly, wherein:
In a further aspect there is provided a capping member for incorporation in a capping mechanism of a printer comprising the pagewidth print head assembly, wherein:
In an eighteenth aspect the present invention provides a capping mechanism for a pagewidth print head assembly having—
a) at least one pagewidth print head and
b) a plurality of nozzles located along the at least one print head and arranged in use to deliver ink onto print media as it is transported past the at least one print head, and
the capping mechanism comprising—
i) at least one capping member having a length corresponding substantially to that of the at least one print head, and
ii) actuating means arranged to effect linear relative transitioning of the at least one capping member and the at least one print head to a position at which nozzle capping engagement is effected between the at least one capping member and the at least one print head.
Optionally the actuating means is arranged to effect linear transitioning of the at least one capping member from a non-capping first position to a second position at which the at least one capping member is located in nozzle capping engagement with the at least one print head.
In a further aspect there is provided a capping mechanism for a pagewidth print head assembly having—
a) a pagewidth print head and
b) a plurality of nozzles located along the print head and arranged in use to deliver ink onto print media as it is transported past the print head,
the capping mechanism comprising—
i) a capping member having a length corresponding substantially to that of the print head, and
ii) an actuating mechanism arranged to effect linear transitioning of the capping member from a non-capping first position to a second position at which the capping member is located in nozzle capping engagement with the print head.
Optionally the capping member is formed effectively as a one-piece member.
Optionally the capping member comprises conjoined capping member portions having an aggregate length corresponding substantially to that of the print head.
Optionally the capping member comprises a body portion formed from a rigid material and a capping portion having a) an integrally formed elastomeric material lip portion and b) a cavity surrounded by the lip portion, and wherein the lip portion is peripherally configured to surround the nozzles collectively.
Optionally the capping member is arranged to be connected to a suction device whereby material may be sucked from the nozzle environment of the print head.
Optionally a chamber is located within the capping member and is connected in fluid passage communication with the cavity and wherein the chamber is arranged to be connected to a suction device whereby material may be sucked from the nozzle environment of the print head.
Optionally a second actuating mechanism is provided for effecting movement of the print head to the second position.
Optionally the second actuating mechanism is arranged to impart linear movement to the print head.
Optionally the second actuating mechanism is arranged to impart arcuate movement to the print head.
Optionally the capping member is positioned in confronting relationship with the print head and wherein the actuating mechanism is arranged to move the capping member in a direction normal to the print head when effecting linear transitioning of the capping member from the first to the second position.
In a further aspect there is provided a capping mechanism for a pagewidth print head assembly having—
a) two confronting pagewidth print heads and
b) a plurality of nozzles arranged in use to deliver ink onto print media as it is transported past the print heads,
the capping mechanism comprising-
i) a capping member associated with each of the print heads and having a length corresponding substantially to that of the print heads, and
ii) actuating mechanisms arranged to effect linear transitioning of each of the capping members from a non-capping first position to a second position at which each said capping member is located in nozzle capping engagement with the associated print head.
Optionally each of the capping members is formed effectively as a one-piece member.
Optionally each of the capping members comprises conjoined capping member portions having an aggregate length corresponding substantially to that of the print head.
Optionally each of the capping members comprises a body portion formed from a rigid material and a capping portion having a) an integrally formed elastomeric material lip portion and b) a cavity surrounded by the lip portion, and wherein the lip portion is peripherally configured to surround the nozzles collectively.
Optionally further actuating mechanisms are provided for effecting movement of the print heads to the second position.
Optionally the further actuating mechanisms are arranged to impart linear movement to the print heads.
Optionally the further actuating mechanisms are arranged to impart arcuate movement to the print heads.
Optionally the capping members are positioned in confronting relationship with the respective print heads when the print heads are in the second position and wherein the actuating mechanisms are arranged to move the respective capping members in directions normal to the associated print heads when effecting linear transitioning of the capping members from the first to the second position.
Optionally the capping members are positioned laterally with respect with the respective print heads when the print heads are in the second position and wherein the actuating mechanisms are arranged to move the respective capping members in a lateral direction when effecting linear transitioning of the capping members from the first to the second position.
Optionally a further actuating mechanism is provided for imparting linear movement to at least one of the print heads, wherein the capping members are positioned laterally with respect to the print heads when in the first position and wherein the capping members are moved laterally to a position between the print heads when transiting linearly from the first to the second position.
In a further aspect there is provided a capping mechanism for a pagewidth print head assembly having—
a) two offset pagewidth print heads and
b) a plurality of nozzles located along each of the print heads and arranged in use to deliver ink onto print media as it is transported past the print heads, the capping mechanism comprising—
i) a capping member associated with each of the print heads and having a length corresponding substantially to that of the print heads, and
ii) actuating mechanisms arranged to effect linear relative transitioning of each of the associated capping members and print heads to a position at which the capping members is located in nozzle capping engagement with the associated print heads.
Optionally the actuating mechanisms are arranged to effect linear transitioning of each of the capping members from a non-capping first position to a second position at which each said capping member is located in nozzle capping engagement with the associated print head.
Optionally the capping members are positioned in confronting relationship with the respective print heads and wherein the actuating mechanisms are arranged to move the respective capping members in directions normal to the associated print heads when effecting linear transitioning of the capping members from the first to the second position.
In a further aspect the present invention provides a printer comprising:
(a) a print head assembly having—
(i) at least one pagewidth print head and
(ii) a plurality of nozzles located along the at least one print head and arranged in use to deliver ink onto print media as it is transported past the at least one print head, and
(b) a capping mechanism having-
i) at least one capping member having a length corresponding substantially to that of the at least one print head, and
ii) actuating means arranged to effect linear relative transitioning of the at least one capping member and the at least one print head to a position at which nozzle capping engagement is effected between the at least one capping member and the at least one print head.
In a further aspect there is provided a method of capping a pagewidth print head assembly having—
a) at least one pagewidth print head and
b) a plurality of nozzles located along the at least one print head and arranged in use to deliver ink onto print media as it is transported past the at least one print head;
and wherein the method comprises:
effecting linear relative transitioning of the at least one print head and at least one associated capping member to a position at which the at least one capping member is located in nozzle capping engagement with the at least one print head.
In a nineteenth aspect the present invention provides a capping mechanism for a printhead having a plurality of nozzles arranged to deliver ink onto print media which, in use, is transported past the printhead, the capping mechanism comprising actuating means arranged to move the printhead in an arcuate direction away from a transport plane of the print media, from a printing first position to a capping second position, and a capping member which is arranged to engage in nozzle capping engagement with the printhead when the printhead is in the second position.
In another aspect there is provided a printer comprising
a) at least one printhead having a plurality of nozzles arranged to deliver ink onto print media which, in use, is transported past the printhead, and
b) a capping mechanism having actuating means arranged to move the printhead in an arcuate direction away from a transport plane of the print media, from a printing first position to a capping second position, and a capping member which is arranged to engage in nozzle capping engagement with the printhead when the printhead is in the second position.
In a further aspect there is provided a capping mechanism for a pagewidth printhead assembly having—
a) at least one pagewidth printhead and
b) a plurality of nozzles located along the printhead and arranged in use to deliver ink onto print media as it is transported past the printhead;
the capping mechanism comprising-
i) at least one capping member having a length corresponding substantially to that of the at least one printhead, and
ii) actuating means arranged to move the at least one printhead in an arcuate direction away from the transport plane of the print media, from a printing first position to a second position at which the at least one capping member is engaged in nozzle capping engagement with the at least one printhead.
Optionally the at least one capping member is formed effectively as a one-piece member.
Optionally the at least one capping member comprises conjoined capping member portions having an aggregate length corresponding substantially to that of the printhead.
Optionally the at least one capping member comprises a body portion formed from a rigid material and a capping portion having a) an integrally formed elastomeric material lip portion and b) a cavity surrounded by the lip portion, and wherein the lip portion is peripherally configured to surround the nozzles collectively of the associated printhead.
Optionally the at least one capping member is arranged to be connected to a suction device whereby material may be sucked from the nozzle environment of the associated printhead.
Optionally a purging chamber is located within the at least one capping member and is arranged to be connected to a suction device whereby material may be sucked from the nozzle environment of the printhead.
Optionally a further actuating mechanism is provided to effect movement of the at least one capping member from a non-capping position to the second position.
Optionally the further actuating mechanism is arranged to impart linear movement to the at least one capping member.
Optionally the further actuating mechanism is arranged to impart arcuate movement to the at least one capping member.
Optionally the at least one capping member is positioned in confronting relationship with an associated said printhead when the printhead is in the second position and wherein the further actuating mechanism is arranged to move the at least one capping member in a direction normal to the associated printhead when effecting linear movement of the at least one capping member from the non-capping position to the second position.
Optionally the at least one capping member is positioned adjacent to and laterally with respect to the at least one printhead, and wherein the further actuating mechanism is arranged to move the at least one capping member in a lateral direction to the second position.
In a further aspect there is provided a capping mechanism for a pagewidth printhead assembly having—
a) two pagewidth printheads and
b) a plurality nozzles located along each of the printheads and arranged in use to deliver ink onto print media as it is transported past the printheads;
the capping mechanism comprising-
i) a capping member associated with each of the printheads and having a length corresponding substantially to that of the printheads, and
ii) actuating means arranged to move each of the printheads in an arcuate direction away from the transport plane of the print media, from a printing first position to a second position at which the capping member is engaged in nozzle capping engagement with the associated printhead.
Optionally each capping member is formed effectively as a one-piece member.
Optionally each capping member comprises conjoined capping member portions having an aggregate length corresponding substantially to that of the printhead.
Optionally each capping member comprises a body portion formed from a rigid material and a capping portion having a) an integrally formed elastomeric material lip portion and b) a cavity surrounded by the lip portion, and wherein the lip portion is peripherally configured to surround the nozzles collectively.
Optionally each capping member is arranged to be connected to a suction device whereby material may be sucked from the nozzle environment of the associated printhead.
Optionally a purging chamber is located within each capping member and is arranged to be connected to a suction device whereby material may be sucked from the nozzle environment of the associated printhead.
Optionally a further actuating mechanism is provided to effect movement of each of the capping members from a non-capping position to the second position.
Optionally the further actuating mechanism is arranged to impart linear movement to each of the capping members.
Optionally the further actuating mechanism is arranged to impart arcuate movement to each of the capping members.
Optionally each of the capping members is positioned in confronting relationship with the associated said printhead when the printhead is in the second position and wherein the further actuating mechanism is arranged to move each of the capping members in a direction normal to the associated printhead when effecting linear movement of the capping members from the non-capping position to the second position.
Optionally each of the capping members is positioned adjacent to and laterally with respect to an associated one of the printheads, and wherein the further actuating mechanism is arranged to move each of the capping members in a lateral direction to the second position.
In a aspect the present invention provides a printer comprising:
a) printhead assembly having—
b) a capping mechanism having-
In a further aspect the present invention provides a method of capping a printhead having a plurality of nozzles arranged to deliver ink onto print media which, in use, is transported past the printhead; the method comprising moving the printhead, in an arcuate direction away from a transport plane of the print media, from a printing first position to a capping second position and engaging the printhead with a capping member which in nozzle capping engagement when the printhead is in the second position.
In another aspect the present invention provides a method of capping a pagewidth printhead assembly having—
a) at least one pagewidth printhead and
b) a plurality of nozzles arranged in use to deliver ink onto print media as it is transported past the printhead;
the method comprising moving the at least one printhead in an arcuate direction away from the transport plane of the print media, from a printing first position to a second position at which a capping member is engaged in nozzle capping engagement with the at least one printhead.
In a twentieth aspect the present invention provides a capping/purging mechanism for a pagewidth printhead assembly having—
a) at least one pagewidth printhead, and
b) a plurality of nozzles located along the at least one printhead and arranged in use to deliver ink onto print media as it is transported past the at least one printhead; and the capping/purging mechanism comprising-
i) at least one capping member having a length corresponding substantially to that of the at least one printhead,
ii) means arranged to move the at least one printhead and/or the at least one capping member to a position at which the at least one capping member is located in nozzle capping engagement with the at least one printhead, and
iii) at least one purging chamber arranged to receive material that is purged from the at least one printhead.
Optionally the at least one capping member is formed effectively as a one-piece member.
Optionally the at least one capping member comprises conjoined capping member portions having an aggregate length corresponding substantially to that of the printhead.
Optionally the at least one capping member comprises a body portion formed from a rigid material and a capping portion having a) an integrally formed elastomeric material lip portion and b) a cavity surrounded by the lip portion, and wherein the lip portion is peripherally configured to surround the nozzles collectively.
Optionally the at least one purging chamber is connectable to a suction device.
Optionally the at least one purging chamber is connectable to the suction device by way of an extractor tube.
Optionally the at least one purging chamber is integrated with the at least one capping member.
Optionally the at least one purging chamber is connected in fluid passage communication with the at least one capping member.
Optionally the at least one purging chamber is carried by a support that also carries the at least one capping member.
Optionally the at least one capping member and the at least one purging chamber form integral portions of a capping/purging member.
Optionally the means arranged to move the at least one printhead and/or the at least one capping member comprises a first actuating means arranged to move the at least one printhead in an arcuate direction away from the plane of print media feed through the printhead assembly and to the position of nozzle capping engagement.
Optionally the means arranged to move the at least one printhead and/or the at least one capping member comprises first and second actuating means arranged to move the at least one printhead and the at least one capping member in arcuate directions to the position of nozzle capping engagement.
Optionally the first actuating means is arranged to move the at least one printhead to a further position at which the purging chamber is arranged to receive material that is purged from the at least one printhead.
Optionally the second actuating means is arranged to move the at least one capping member to a further position at which the purging chamber is arranged to receive material that is purged from the at least one printhead.
Optionally the means arranged to move the at least one printhead and/or the at least one capping member comprises an actuating means arranged to move the at least one capping member and the at least one purging chamber in a linear direction to the position of nozzle capping engagement.
In a further aspect there is provided a capping/purging mechanism for a pagewidth printhead assembly having—
a) a pagewidth printhead, and
b) a plurality of nozzles located along the printhead and arranged in use to deliver ink onto print media as it is transported past the printhead;
and the capping/purging mechanism comprising—
i) a capping member having a length corresponding substantially to that of the at least one printhead,
ii) means arranged to move the capping member and/or the printhead to a position at which the capping member is located in nozzle capping engagement with the printhead, and
iii) a purging chamber arranged to receive material that is purged from the printhead.
Optionally the capping member is formed effectively as a one-piece member.
Optionally the capping member comprises conjoined capping member portions having an aggregate length corresponding substantially to that of the printhead.
Optionally the capping member comprises a body portion formed from a rigid material and a capping portion having a) an integrally formed elastomeric material lip portion and b) a cavity surrounded by the lip portion, and wherein the lip portion is peripherally configured to surround the nozzles collectively.
Optionally the purging chamber is connectable to a suction device.
Optionally the purging chamber is connectable to the suction device by way of an extractor tube.
Optionally the purging chamber is integrated with the capping member.
Optionally the purging chamber is connected in fluid passage communication with the at least one capping member.
Optionally the purging chamber is carried by a support that also carries the capping member.
Optionally the capping member and the purging chamber form integral portions of a capping/purging member.
Optionally the means arranged to move the printhead and/or the capping member comprises a first actuating means arranged to move the printhead in an arcuate direction away from the plane of print media feed through the printhead assembly and to the position of nozzle capping engagement.
Optionally the means arranged to move the printhead and/or the capping member comprises actuating means arranged to move the capping member in an arcuate direction to the position of nozzle capping engagement.
Optionally the means arranged to move the printhead and/or the capping member comprises an actuating means arranged to move the capping member and the purging chamber in a linear direction to the position of nozzle capping engagement.
Optionally the capping member and the purging chamber are both carried by a rotatable turret
In a further aspect there is provided a capping/purging mechanism for a pagewidth printhead assembly having—
a) two confronting pagewidth printheads, and
b) a plurality of nozzles located along the printhead and arranged in use to deliver ink onto print media as it is transported past the printheads;
and the capping/purging mechanism comprising—
i) a capping member associated with each of the printheads and having a length corresponding substantially to that of the printheads,
ii) means arranged to move the printheads and the capping members to positions at which the capping members are located in nozzle capping engagement with the printheads, and
iii) a purging chamber associated with each of the capping members and arranged to receive material that is purged from the at least one printhead.
Optionally the means arranged to move the printheads and the capping members comprise actuating means arranged to move the capping members and the printheads in arcuate directions to the positions of nozzle capping engagement.
In a further aspect there is provided a printer comprising
a) a pagewidth printhead assembly having—
b) a capping/purging mechanism having-
In another aspect there is provided a method of capping and purging a pagewidth printhead assembly having—
a) at least one pagewidth printhead and
b) a plurality of nozzles located along the at least one printhead and arranged in use to deliver ink onto print media as it is transported past the at least one printhead;
the method comprising the steps of:
i) moving the at least one printhead and/or at least one associated capping member to a position at which the capping member is located in nozzle capping engagement with the at least on printhead and, either simultaneously or separately,
iii) effecting purging of material from the at least one printhead by way of a purging chamber associated with the at least one capping member.
In a twenty first aspect the present invention provides a capping mechanism for a pagewidth printhead assembly having—
a) at least one pagewidth printhead and
b) a plurality of nozzles located along the at least one printhead and arranged in use to deliver ink onto print media as it is transported past the printhead;
the capping mechanism comprising—
i) a capping member formed from a flexible sheet-like material and having a width corresponding substantially to the length of the at least one printhead, and
ii) means arranged to move the capping member and/or the at least one printhead to a position at which the capping member is located in nozzle capping engagement with the at least one printhead.
In a further aspect there is provided a capping mechanism for a pagewidth printhead assembly having—
a) at least one pagewidth printhead and
b) a plurality of nozzles located along the at least one printhead and arranged in use to deliver ink onto print media as it is transported past the printhead;
the capping mechanism comprising-
i) a capping member formed from a flexible sheet-like material and having a width corresponding substantially to the length of the at least one printhead, and
ii) means arranged to position the capping member in nozzle capping engagement with the at least one printhead.
Optionally the capping member comprises a single layer sheet-like material.
Optionally the capping member comprises a multi-layer sheet-like material.
Optionally the capping member comprises a compressible sheet-like material.
Optionally means are provided for delivering a fluid to a region between the multiple layers of the capping member.
Optionally the capping member is formed from a sheet-like material having hydrophobic properties.
Optionally the capping member is formed from a closed cell thermoplastics material.
Optionally the capping member is formed from a sheet-like material having hydrophilic properties.
Optionally the capping member is formed from an open cell silicone material.
Optionally the capping member comprises an individual capping member.
Optionally the capping member comprises a portion of a roll of said capping member material.
In a further aspect there is provided a capping mechanism including a said roll of the capping member material from which the capping member is in use fed to the position of nozzle capping engagement with the at least one printhead.
In a further aspect there is provided a capping mechanism including a spool for receiving spent said capping member material following a capping operation.
In another aspect the present invention provides a capping mechanism for a pagewidth printhead assembly having—
a) a pagewidth printhead and
b) a plurality nozzles located along the printhead and arranged in use to deliver ink onto print media as it is transported past the printhead;
the capping mechanism comprising—
i) a capping member formed from a flexible sheet-like material and having a width corresponding substantially to the length of the printhead, and
ii) a platen positioned adjacent the printhead and arranged to position the capping member in nozzle capping engagement with the at least one printhead.
Optionally the capping member comprises a single layer sheet-like material.
Optionally the capping member comprises a multi-layer sheet-like material.
Optionally the capping member comprises a compressible sheet-like material.
Optionally means are provided for delivering a fluid to a region between the multiple layers of the capping member.
Optionally the capping member is formed from a sheet-like material having hydrophobic properties.
Optionally the capping member is formed from a closed cell thermoplastics material.
Optionally the capping member is formed from a sheet-like material having hydrophilic properties.
Optionally the capping member is formed from an open cell silicone material.
Optionally the capping member comprises an individual capping member.
Optionally the capping member comprises a portion of a roll of said capping member material.
In another aspect the present invention provides a capping mechanism including a said roll of the capping member material from which the capping member is in use fed to the position of nozzle capping engagement with the at least one printhead.
In another aspect the present invention provides a capping mechanism including a spool for receiving spent said capping member material following a capping operation.
In a further aspect there is provided a printer comprising:
a) a pagewidth printhead assembly having—
b) a capping mechanism having-
In a further aspect there is provided a printer comprising:
a) a pagewidth printhead assembly having—
b) a capping mechanism having-
In a further aspect there is provided a method of capping a pagewidth printhead assembly having—
a) at least one pagewidth printhead and
b) a plurality of nozzles located along the at least one printhead and arranged in use to deliver ink onto the print media as it is transported past the at least one printhead;
the method comprising moving the at least one printhead and/or a capping member having a flexible sheet-like form to a position at which the capping member is located in nozzle capping engagement with the at least one printhead.
In another aspect there is provided a method of capping a pagewidth printhead assembly having—
a) at least one pagewidth printhead and
b) a plurality of nozzles located along the at least one printhead and arranged in use to deliver ink onto the print media as it is transported past the at least one printhead;
the method comprising positioning a capping member having a flexible sheet-like form in nozzle capping engagement with the at least one printhead.
In a twenty second aspect the present invention provides a capping mechanism for a print head having a plurality of nozzles arranged to deliver ink onto print media which, in use, is transported past the print head; the capping mechanism comprising:
a) a capping member that is configured to contact the print head in nozzle capping engagement,
b) a carrier supporting the capping member, and
c) an actuating mechanism arranged to effect movement of the carrier back and forth between a first position at which the capping member is located remotely with respect to the print head and a second position at which the capping member is located in contact with the print head;
the capping member being pivotally mounted to the carrier and being arranged to pivot relative to the carrier during back and forth transitional movement of the carrier between a transition position and the second position, where the transition position is located intermediate the first and second positions.
In another aspect there is provided a method of capping a print head having a plurality of nozzles arranged to deliver ink onto print media which, in use, is transported past the print head; the method comprising the steps of:
i) effecting movement of a carrier and a capping member carried by the carrier from a first position remote from the print head to a second position at which the capping member is moved into nozzle capping engagement with the print head,
ii) moving the carrier and the capping member through a transition position during their movement from the first position to the second position, and
iii) effecting pivotal movement of the capping member relative to the carrier during a transitional movement made by the carrier between the transition position and the second position.
Optionally the transitional movement made by the carrier is small relative to the movement made by the carrier between the first and second positions.
In a further aspect there is provided a capping mechanism for a pagewidth print head having a plurality of nozzles located along the print head and arranged to deliver ink onto print media which, in use, is transported past the print head, the capping mechanism comprising:
a) a capping member which has a length corresponding substantially to that of the print head and which is configured to contact the print head in nozzle capping engagement,
b) a carrier supporting the capping member, and
c) an actuating mechanism arranged to effect movement of the carrier back and forth between a first position at which the capping member is located remotely with respect to the print head and a second position at which the capping member is located in contact with the print head;
the capping member being pivotally mounted to the carrier and being arranged to pivot relative to the carrier during back and forth transitional movement of the carrier between a transition position and the second position, where the transition position is located intermediate the first and second positions.
Optionally the actuating mechanism is arranged to move the carrier pivotally between the first and second positions during a capping operation.
Optionally the carrier is pivotally mounted to a support by way of a pivotal element having a first pivot axis, and the capping member is pivotally mounted to the carrier by way of a pivoting arrangement having a second pivot axis that is located parallel to and spaced from the first pivot axis.
Optionally the capping member has a capping element that is radially displaced from the second pivot axis, and the radial displacement of the capping element from the second pivot axis is small relative to the spacing between the first and second pivot axes.
Optionally the spacing between the first and second pivot axes is of the order of three times the radial displacement of the capping element from the second pivot axis.
Optionally the transition position is located a distance from the second position which is small relative to the distance between the first and second positions.
Optionally the ratio of the transitional pivotal movement of the carrier to the total pivotal movement of the carrier between the first and second positions is within the range 1:12 to 1:20.
Optionally the capping element comprises a substantially rigid channel-shaped element.
Optionally the capping element incorporates a lip which is formed from an elastomeric material.
Optionally the capping element is arranged to engage with a face portion of the carrier when the carrier is located in the first position whereby a recessed portion of the capping element is effectively closed against loss of contained moisture and ingress of contaminating material.
Optionally the capping element incorporates a lip which is formed from an elastomeric material, wherein the lip is configured to locate about the print head nozzles when the capping member is in the second position, and wherein the lip is arranged to engage with a face portion of the carrier when the carrier is located in the first position whereby a recessed portion of the capping element is effectively closed against loss of contained moisture and ingress of contaminating material.
Optionally the capping member is provided with at least one first stop member that is arranged to contact the print head and thereby to effect pivoting of the capping member relative to the carrier as the carrier makes the transitional movement from the transition position to the second position.
Optionally the capping member is provided with at least one second stop member that is arranged to contact the carrier and thereby prevent pivoting of the capping member relative to the carrier as the carrier moves from the transition position to the first position.
Optionally the capping member is pivotally mounted to the carrier by a pivot shaft which extends along a marginal edge portion of the carrier.
Optionally a biasing device is mounted to the capping member and engages the carrier in a manner to bias the capping member in a direction away from nozzle capping engagement with the print head.
Optionally the biasing device comprises a torsion spring.
Optionally the carrier is mounted to the support by spaced-apart end plates which are mounted to the print head.
Optionally the actuating mechanism comprises an electric motor which is coupled to the carrier and arranged to impart pivotal motion to the carrier by way of a crank and a motion translating mechanism.
Optionally at least one abutment is located adjacent the print head and is operable to effect pivoting of the capping member when the carrier approaches the first position, whereby the capping member is moved away from the print media feed path.
Optionally a capping element portion of the capping member is arranged to engage with a face portion of the carrier when the carrier is located in the first position whereby a recessed portion of the capping element is effectively closed against loss of contained moisture and ingress of contaminating material.
Optionally the capping mechanism and the printhead are arranged to operate within an inkjet printer.
Optionally the capping mechanism is configured for operative engagement with a capping mechanism protector which comprises a covering member arranged to engage with the capping mechanism during intervals when the capping mechanism is not engaged with the print head.
In a further aspect there is provided a capping mechanism wherein:
In a twenty third aspect the present invention provides an inkjet printer comprising:
a) a print head having a plurality of nozzles arranged to deliver ink onto print media which, in use, is transported past the print head, and
b) a capping mechanism for the print head;
the capping mechanism comprising-
i) a capping member that is configured to contact the print head in nozzle capping engagement,
ii) a carrier supporting the capping member, and
iii) an actuating mechanism arranged to effect movement of the carrier back and forth between a first position at which the capping member is located remotely with respect to the print head and a second position at which the capping member is located in contact with the print head;
the capping member being pivotally mounted to the carrier and being arranged to pivot relative to the carrier during back and forth transitional movement of the carrier between a transition position and the second position, where the transition position is located intermediate the first and second positions.
In another aspect the present invention provides a inkjet printer comprising:
a) a pagewidth print head having a plurality of nozzles located along the print head and arranged to deliver ink onto print media which, in use, is transported past the print head, and
b) a capping mechanism for the print head;
the capping mechanism comprising-
i) a capping member which has a length corresponding substantially to that of the print head and which is configured to contact the print head in nozzle capping engagement,
ii) a carrier supporting the capping member, and
ii) an actuating mechanism arranged to effect movement of the carrier back and forth between a first position at which the capping member is located remotely with respect to the print head and a second position at which the capping member is located in contact with the print head, the capping member being pivotally mounted to the carrier and being arranged to pivot relative to the carrier during back and forth transitional movement of the carrier between a transition position and the second position, where the transition position is located intermediate the first and second positions.
Optionally the actuating mechanism is arranged to move the carrier pivotally between the first and second positions during a capping operation.
Optionally the carrier is pivotally mounted to a support by way of a pivotal element having a first pivot axis, and the capping member is pivotally mounted to the carrier by way of a pivoting arrangement having a second pivot axis that is located parallel to and spaced from the first pivot axis.
Optionally the capping member has a capping element that is radially displaced from the second pivot axis, and wherein the radial displacement of the capping element from the second pivot axis is small relative to the spacing between the first and second pivot axes.
Optionally the spacing between the first and second pivot axes is of the order of three times the radial displacement of the capping element from the second pivot axis.
Optionally the transition position is located a distance from the second position which is small relative to the distance between the first and second positions.
Optionally the ratio of the transitional pivotal movement of the carrier to the total pivotal movement of the carrier between the first and second positions is within the range 1:12 to 1:20.
Optionally the capping element comprises a substantially rigid channel-shaped element.
Optionally the capping element incorporates a lip which is formed from an elastomeric material.
Optionally the capping element is arranged to engage with a face portion of the carrier when the carrier is located in the first position whereby a channel portion of the capping element is effectively closed against loss of contained moisture and ingress of contaminating material.
Optionally the capping element incorporates a lip which is formed from an elastomeric material, wherein the lip is configured to locate about the print head nozzles when the capping member is in the second position, and wherein the lip is arranged to engage with a face portion of the carrier when the carrier is located in the first position whereby a channel portion of the capping element is effectively closed against loss of contained moisture and ingress of contaminating material.
Optionally the capping member is provided with a first stop member that is arranged to contact the print head and thereby to effect pivoting of the capping member relative to the carrier as the carrier makes the transitional movement from the transition position to the second position.
Optionally the capping member is provided with a second stop member that is arranged to contact the carrier and thereby prevent pivoting of the capping member relative to the carrier as the carrier moves from the transition position to the first position.
Optionally the capping member is pivotally mounted to the carrier by a pivot shaft which extends along a marginal edge portion of the carrier.
Optionally a biasing device is mounted to the capping member and engages the carrier in a manner to bias the capping member in a direction away from nozzle capping engagement with the print head.
Optionally the biasing device comprises a torsion spring.
Optionally the carrier is mounted to the support by spaced-apart end plates which are mounted to the print head.
Optionally the actuating mechanism comprises an electric motor which is coupled to the carrier and arranged to impart pivotal motion to the carrier by way of a crank and a motion translating mechanism.
Optionally an abutment is located adjacent the print head and is operable to effect pivoting of the capping member when the carrier approaches the second position, whereby the capping member is moved away from the print media feed path.
Optionally a capping element portion of the capping member is arranged to engage with a face portion of the carrier when the carrier is located in the first position whereby a recessed portion of the capping element is effectively closed against loss of contained moisture and ingress of contaminating material.
Optionally the printer further comprising a protector for the capping mechanism, the protector comprising a covering member arranged to engage with the capping mechanism during intervals when the capping mechanism is not engaged with the print head.
In a twenty fourth aspect the present invention provides a protector for a capping facility for a print head and which comprises a covering member which is arranged to engage with the capping facility during intervals when the capping facility is not engaged with the print head.
In a further aspect there is provided a method of protecting a printer capping facility against loss of moisture and/or ingress of contaminating material, the method comprising engaging the capping facility with a covering member during intervals when the capping facility is not engaged with the print head.
In another aspect there is provided a protector for a capping facility in the form of a capping mechanism for a print head having a plurality of ink-delivery nozzles and wherein:
a) the capping mechanism comprises
i) a capping member that is configured to contact the print head in nozzle capping engagement,
ii) a carrier supporting the capping member, and
iii) an actuating mechanism arranged to effect movement of the carrier back and forth between a first position at which the capping member is located remotely with respect to the print head and a second position at which the capping member is located in contact with the print head; and
b) the protector comprises a covering member which is arranged to be engaged by the capping member when the capping member is located in the first position.
In a further aspect there is provided a protector for a capping facility in the form of a capping mechanism for a pagewidth print head having a plurality of nozzles located along the print head, and wherein:
a) the capping mechanism comprises:
i) a capping member which has a length corresponding substantially to that of the print head and which is configured to contact the print head in nozzle capping engagement,
ii) a carrier supporting the capping member, and
iii) an actuating mechanism arranged to effect movement of the carrier back and forth between a first position at which the capping member is located remotely with respect to the print head and a second position at which the capping member is located in contact with the print head;
b) the capping member is pivotally mounted to the carrier and is arranged to pivot relative to the carrier during back and forth transitional movement of the carrier between a transition position and the second position, where the transition position is located intermediate the first and second positions; and
c) the protector comprises a covering member which is arranged to be engaged by the capping member when the capping member is located in the first position.
Optionally the covering member is constituted by the carrier.
Optionally the actuating mechanism is arranged to move the carrier pivotally between the first and second positions during a capping operation.
Optionally the carrier is pivotally mounted to a support by way of a pivotal element having a first pivot axis, and the capping member is pivotally mounted to the carrier by way of a pivoting arrangement having a second pivot axis that is located parallel to and spaced from the first pivot axis.
Optionally the capping member has a capping element that is radially displaced from the second pivot axis, and the radial displacement of the capping element from the second pivot axis is small relative to the spacing between the first and second pivot axes.
Optionally the spacing between the first and second pivot axes is of the order of three times the radial displacement of the capping element from the second pivot axis.
Optionally the transition position is located a distance from the second position which is small relative to the distance between the first and second positions.
Optionally the ratio of the transitional pivotal movement of the carrier to the total pivotal movement of the carrier between the first and second positions is within the range 1:12 to 1:20.
Optionally the capping element comprises a substantially rigid channel-shaped element.
Optionally the capping element incorporates a lip which is formed from an elastomeric material.
Optionally the capping element is arranged to engage with a face portion of the carrier when the carrier is located in the first position whereby a recessed portion of the capping element is effectively closed against loss of contained moisture and ingress of contaminating material.
Optionally the capping element incorporates a lip which is formed from an elastomeric material, wherein the lip is configured to locate about the print head nozzles when the capping member is in the second position, and wherein the lip is arranged to engage with a face portion of the carrier when the carrier is located in the first position whereby a recessed portion of the capping element is effectively closed against loss of contained moisture and ingress of contaminating material.
Optionally the capping member is provided with at least one first stop member that is arranged to contact the print head and thereby to effect pivoting of the capping member relative to the carrier as the carrier makes the transitional movement from the transition position to the second position.
Optionally the capping member is provided with at least one second stop member that is arranged to contact the carrier and thereby prevent pivoting of the capping member relative to the carrier as the carrier moves from the transition position to the first position.
Optionally the capping member is pivotally mounted to the carrier by a pivot shaft which extends along a marginal edge portion of the carrier.
Optionally a biasing device is mounted to the capping member and engages the carrier in a manner to bias the capping member in a direction away from nozzle capping engagement with the print head.
Optionally the biasing device comprises a torsion spring.
Optionally the actuating mechanism comprises an electric motor which is coupled to the carrier and arranged to impart pivotal motion to the carrier by way of a crank and a motion translating mechanism.
Optionally at least one abutment is located adjacent the print head and is operable to effect pivoting of the capping member when the carrier approaches the first position, whereby the capping member is moved away from the print media feed path.
In a further aspect there is provided a protector, wherein:
In a further aspect there is provided a protector wherein;
Optionally the capping mechanism and the print head are arranged for use within an inkjet printer.
In a twenty fifth aspect the present invention provides a inkjet printer having a protector for a capping facility for a print head within the printer, the protector comprising a covering member which is arranged to engage with the capping facility during intervals when the capping facility is not engaged with the print head.
In another aspect the present invention provides an inkjet printer having a protector for a capping facility in the form of a capping mechanism for a print head having a plurality of ink-delivery nozzles and wherein:
a) the capping mechanism comprises
i) a capping member that is configured to contact the print head in nozzle capping engagement,
ii) a carrier supporting the capping member, and
iii) an actuating mechanism arranged to effect movement of the carrier back and forth between a first position at which the capping member is located remotely with respect to the print head and a second position at which the capping member is located in contact with the print head; and
b) the protector comprises a covering member which is arranged to be engaged by the capping member when the capping member is located in the first position.
In a further aspect the present invention provides an inkjet printer having a protector for a capping facility in the form of a capping mechanism for a pagewidth print head having a plurality of nozzles located along the print head, and wherein:
a) the capping mechanism comprises:
i) a capping member which has a length corresponding substantially to that of the print head and which is configured to contact the print head in nozzle capping engagement,
ii) a carrier supporting the capping member, and
iii) an actuating mechanism arranged to effect movement of the carrier back and forth between a first position at which the capping member is located remotely with respect to the print head and a second position at which the capping member is located in contact with the print head;
b) the capping member is pivotally mounted to the carrier and is arranged to pivot relative to the carrier during back and forth transitional movement of the carrier between a transition position and the second position, where the transition position is located intermediate the first and second positions; and
c) the protector comprises a covering member which is arranged to be engaged by the capping member when the capping member is located in the first position.
Optionally the covering member is constituted by the carrier.
Optionally the actuating mechanism is arranged to move the carrier pivotally between the first and second positions during a capping operation.
Optionally the carrier is pivotally mounted to a support by way of a pivotal element having a first pivot axis, and the capping member is pivotally mounted to the carrier by way of a pivoting arrangement having a second pivot axis that is located parallel to and spaced from the first pivot axis.
Optionally the capping member has a capping element that is radially displaced from the second pivot axis, and the radial displacement of the capping element from the second pivot axis is small relative to the spacing between the first and second pivot axes.
Optionally the spacing between the first and second pivot axes is of the order of three times the radial displacement of the capping element from the second pivot axis.
Optionally the transition position is located a distance from the second position which is small relative to the distance between the first and second positions.
Optionally the ratio of the transitional pivotal movement of the carrier to the total pivotal movement of the carrier between the first and second positions is within the range 1:12 to 1:20.
Optionally the capping element comprises a substantially rigid channel-shaped element.
Optionally the capping element incorporates a lip which is formed from an elastomeric material.
Optionally the capping element is arranged to engage with a face portion of the carrier when the carrier is located in the first position whereby a recessed portion of the capping element is effectively closed against loss of contained moisture and ingress of contaminating material.
Optionally the capping element incorporates a lip which is formed from an elastomeric material, wherein the lip is configured to locate about the print head nozzles when the capping member is in the second position, and wherein the lip is arranged to engage with a face portion of the carrier when the carrier is located in the first position whereby a recessed portion of the capping element is effectively closed against loss of contained moisture and ingress of contaminating material.
Optionally the capping member is provided with at least one first stop member that is arranged to contact the print head and thereby to effect pivoting of the capping member relative to the carrier as the carrier makes the transitional movement from the transition position to the second position.
Optionally the capping member is provided with at least one second stop member that is arranged to contact the carrier and thereby prevent pivoting of the capping member relative to the carrier as the carrier moves from the transition position to the first position.
Optionally the capping member is pivotally mounted to the carrier by a pivot shaft which extends along a marginal edge portion of the carrier.
Optionally a biasing device is mounted to the capping member and engages the carrier in a manner to bias the capping member in a direction away from nozzle capping engagement with the print head.
Optionally the biasing device comprises a torsion spring.
Optionally the actuating mechanism comprises an electric motor which is coupled to the carrier and arranged to impart pivotal motion to the carrier by way of a crank and a motion translating mechanism.
Optionally at least one abutment is located adjacent the print head and is operable to effect pivoting of the capping member when the carrier approaches the first position, whereby the capping member is moved away from the print media feed path.
In a further aspect there is provided an inkjet printer wherein;
The invention may be embodied in various arrangements, some of which are described by way of illustrative examples with reference to the accompanying drawings.
In the drawings—
As illustrated in
Each of the printheads 51 may, for example, be in the form of that which is described in the Applicant's co-pending US patent applications listed in the cross-references section above and all of which are incorporated herein by reference. But other types of pagewidth printheads (including thermal or piezo-electric activated bubble jet printers) that are known in the art may alternatively be employed.
As illustrated in
a) a plastics material support member 56,
b) four printhead micro-electro-mechanical system (MEMS) integrated circuit chips 57 (referred to herein simply as “printhead chips”),
c) a fluid distribution arrangement 58 mounting each of the printhead chips 57 to the support member 56, and
d) a flexible printed circuit connector 59 for connecting electrical power and signals to each of the printhead chips 57.
However, it will be understood that each of the printheads 51 may comprise substantially more than four modules 55 and/or that substantially more than four printhead chips 57 may be mounted to each module.
Each of the chips (as described in more detail later) has up to 7680 nozzles formed therein for delivering printing fluid onto the surface of the print media and, possibly, a further 640 nozzles for delivering pressurised air or other gas toward the print media.
The four printhead modules 55 are removably located in a channel portion 60 of a casing 61 by way of the support member 56, and the casing contains electrical circuitry 63 mounted on four printed circuit boards 62 (one for each printhead module 55) for controlling delivery of computer regulated power and drive signals by way of flexible PCB connectors 63a to the printhead chips 57. As illustrated in
The printed circuit boards 62 are carried by plastics material mouldings 66 which are located within the casing 61 and the mouldings also carry busbars 67 which in turn carry current for powering the printhead chips 57 and the electrical circuitry. A cover 68 normally closes the casing 61 and, when closed, the cover acts against a loading element 69 that functions to urge the flexible printed circuit connector 59 against the busbars 67.
The four printhead modules 55 may incorporate four conjoined support members 56 or, alternatively, a single support member 56 may be provided to extend along the full length of the printhead 51 and be shared by all four printhead modules. That is, a single support member 56 may carry all sixteen printhead chips 57.
As shown in
A coupling device 73 is provided for coupling fluid into the seven channels 70 from respective ones of the fluid delivery lines 65.
The fluid distribution arrangements 58 are provided for channelling fluid (printing ink and air) from each group 71 of holes to an associated one of the printhead chips 57. Printing fluids from six of the seven channel 70 are delivered to twelve rows of nozzles on each printhead chip 57 (ie, one fluid to two rows) and the millimetric-to-micrometric distribution of the fluids is effected by way of the fluid distribution arrangements 58. For a more detailed description of one arrangement for achieving this process reference may be made to the co-pending US patent applications referred to previously.
An illustrative embodiment of one printhead chip 57 is described in more detail, with reference to
A print media guide 74 is mounted to each of the printheads 51 and is shaped and arranged to guide the print media past the printing zone, as defined collectively by the printhead chips 57, in a manner to preclude the print media from contacting the nozzles of the printhead chips.
The fluids to be delivered to the printheads 51 will be determined by the functionality of the printer 52. However, as illustrated, provision is made for delivering six printing fluids and air to the printhead chips 57 by way of the seven channels 70 in the support member 56. The six printing fluids may comprise:
Cyan (C) printing ink
Magenta (M) printing ink
Yellow (Y) printing ink
Black (K) printing ink
Infrared (IR) ink
Fixative.
The filtered air will in use be delivered at a pressure slightly above atmospheric from a pressurised source (not shown) that is integrated in the printer.
Having identified the salient features of the pagewidth printheads, various embodiments of the capping mechanism that characterises the invention are now described with reference to the largely diagrammatic illustrations contained in
As illustrated in
The capping member 83 is directed into the gap 80 by way of a ramp or chute 84 and an actuating mechanism 85 is employed for propelling the capping member into the desired position. The actuating mechanism may comprise a geared motor drive, pneumatic actuator or other such mechanism as is known in the art for effecting movement of relatively small mechanical devices.
The capping member is dimensioned to cover the confronting surfaces of the printheads 51 and, thus, it has a depth (in the direction of arrow 82) approximately equal to that of the printhead 51 and a width (in the direction into the paper) which is approximately equal to the length of the printheads.
The capping member 83 may be formed from various types of materials that have a sheet-like form and are flexible. The sheet-like form is required in order that the capping member might be inserted into the relatively narrow gap 80 that will normally be present between the printheads 51, and flexibility is required to enable the creation of an effective capping seal between the capping member and the printheads.
The material from which the capping member 83 is formed will be dependent upon whether simple capping is required or whether the capping member is required also to absorb and carry purged ink and other material away from the printing zone of the printheads. For simple capping the material might be selected for hydrophobic properties, and when required to assist in purging functions the material might be selected for hydrophilic properties. The former material might comprise a closed cell thermoplastics material and the latter material might comprise and open cell silicone material.
In any event, the material from which the capping member is formed will normally exhibit a degree of compressibility in order that a positive reactive force might be established and maintained between the printheads and the capping member during the capping operation. Alternatively or additionally, the capping member 83 might be formed from layered sheets, so that a fluid (ie, a liquid or a gas) might be directed into the region between the layers to change the effective thickness of the capping member. A fluid delivery mechanism 85a is shown in
The mechanism that is illustrated in
The capping member 88 is in this case provided in the form of a roll 89 of sheet material of one or other of the types above described and, when a capping operation is to be performed, for example between print runs, the following operations are performed:
1. Print media is advanced beyond the printhead assembly in the direction of arrow 87.
2. The platen 86 is lowered by an actuating mechanism 90.
3. The sheet-like capping member 88 is fed through the gap 80 from the roll 89.
4. The platen 86 is raised by the actuating mechanism 90 to position the capping member 88 in nozzle capping engagement with the printhead chips 57.
When capping is no longer required and a purging operation, if any, has been completed, the spent capping member 88 is separated from the roll 89 by a cutter mechanism 91 and the capping member is drawn from the gap 80 in the direction opposite to that indicated by arrow 87. Feeding of the capping member 88 into and out from the gap 80 may be effected manually or mechanically, depending upon the size and required operating speed of the printer of which the capping mechanism forms a part.
When the capping mechanism as illustrated in
The capping mechanism as illustrated in
One of the printhead chips 57 is now described in more detail with reference to
As indicated above, each printhead chip 57 is provided with 7680 printing fluid delivery nozzles 150. The nozzles are arrayed in twelve rows 151, each having 640 nozzles, with an inter-nozzle spacing X of 32 microns. Adjacent rows are staggered by a distance equal to one-half of the inter-nozzle spacing so that a nozzle in one row is positioned mid-way between two nozzles in adjacent rows. Also, there is an inter-nozzle spacing Y of 80 microns between adjacent rows of nozzles.
Two adjacent rows of the nozzles 150 are fed from a common supply of printing fluid. This, with the staggered arrangement, allows for closer spacing of ink dots during printing than would be possible with a single row of nozzles and also allows for a level of redundancy that accommodates nozzle failure.
The printhead chips 57 are manufactured using an integrated circuit fabrication technique and, as previously indicated, embody micro-electromechanical systems (MEMS). Each printhead chip 57 includes a silicon wafer substrate 152, and a 0.42 micron 1 P4M 12 volt CMOS micro-processing circuit is formed on the wafer. Thus, a silicon dioxide layer 153 is deposited on the substrate 152 as a dielectric layer and aluminium electrode contact layers 154 are deposited on the silicon dioxide layer 153. Both the substrate 152 and the layer 153 are etched to define an ink channel 155, and an aluminium diffusion barrier 156 is positioned about the ink channel 155.
A passivation layer 157 of silicon nitride is deposited over the aluminium contact layers 154 and the layer 153. Portions of the passivation layer 157 that are positioned over the contact layers 154 have openings 158 therein to provide access to the contact layers.
Each nozzle 150 includes a nozzle chamber 159 which is defined by a nozzle wall 160, a nozzle roof 161 and a radially inner nozzle rim 162. The ink channel 155 is in fluid communication with the chamber 159.
A moveable rim 163, that includes a movable seal lip 164, is located at the lower end of the nozzle wall 160. An encircling wall 165 surrounds the nozzle and provides a stationery seal lip 166 that, when the nozzle 150 is at rest as shown in
The nozzle wall 160 forms part of lever arrangement that is mounted to a carrier 168 having a generally U-shaped profile with a base 169 attached to the layer 157. The lever arrangement also includes a lever arm 170 that extends from the nozzle wall and incorporates a lateral stiffening beam 171. The lever arm 170 is attached to a pair of passive beams 172 that are formed from titanium nitride and are positioned at each side of the nozzle as best seen in
The lever arm 170 is also attached to an actuator beam 173, which is formed from TiN. This attachment to the actuator beam is made at a point a small but critical distance higher than the attachments to the passive beam 172.
As can best be seen from
The actuator beam 173 is conductive, being composed of TiN, but has a sufficiently high electrical resistance to generate self-heating when a current is passed between the electrodes 174 and 175. No current flows through the passive beams 172, so they do not experience thermal expansion.
In operation, the nozzle is filled with ink 177 that defines a meniscus 178 under the influence of surface tension. The ink is retained in the chamber 159 by the meniscus, and will not generally leak out in the absence of some other physical influence.
To fire ink from the nozzle, a current is passed between the contacts 174 and 175, passing through the actuator beam 173. The self-heating of the beam 173 causes the beam to expand, and the actuator beam 173 is dimensioned and shaped so that the beam expands predominantly in a horizontal direction with respect to
The relative horizontal inflexibility of the passive beams 172 prevents them from allowing much horizontal movement of the lever arm 170. However, the relative displacement of the attachment points of the passive beams and actuator beam respectively to the lever arm causes a twisting movement that, in turn, causes the lever arm 170 to move generally downwardly with a pivoting or hinging motion. However, the absence of a true pivot point means that rotation is about a pivot region defined by bending of the passive beams 172.
The downward movement (and slight rotation) of the lever arm 170 is amplified by the distance of the nozzle wall 160 from the passive beams 172. The downward movement of the nozzle walls and roof causes a pressure increase within the chamber 159, causing the meniscus 178 to bulge as shown in
As shown in
Immediately after the drop 179 detaches, the meniscus 178 forms the concave shape shown in
As can best be seen from
Test circuitry can be used to confirm that actuation causes this closing of the circuit formed by the contacts 180 and 181. If the circuit is closed appropriately, it can generally be assumed that the nozzle is operative.
As stated previously the integrated circuits of the printhead chips 57 are controlled by the print engine controller (PEC) integrated circuits of the drive electronics 63. One or more PEC integrated circuits 100 is or are provided (depending upon the printing speed required) in order to enable page-width printing over a variety of different sized pages or continuous sheets. As described previously, each of the printed circuit boards 62 carried by the support moulding 66 carries one PEC integrated circuit 190 (
An example of a PEC integrated circuit which is suitable for driving the printhead chips is described in the Applicant's co-pending U.S. patent application Ser. Nos. 09/575,108 (Docket No. PEC01US), 09/575,109 (Docket No. PEC02US), 09/575,110 (Docket No. PEC03US), 09/607,985 (Docket No. PEC04US), 09/607,990 (Docket No. PEC05US) and 09/606,999 (Docket No. PEC07US), which are incorporated herein by reference. However, a brief description of the circuit is provided as follows with reference to
The data flow and functions performed by the PEC integrated circuit 190 are described for a situation where the PEC integrated circuit is provided for driving a printhead 51 having a plurality of printhead modules 55; that is four modules as described above. As also described above, each printhead module 55 provides for six channels of fluid for printing, these being:
As indicated in
Due to the page-width form of the printhead assembly, each image should be printed at a constant speed to avoid creating visible artifacts. This means that the printing speed should be varied to match the input data rate. Document rasterization and document printing are therefore decoupled to ensure the printhead assembly has a constant supply of data. In this arrangement, an image is not printed until it is fully rasterized and, in order to achieve a high constant printing speed, a compressed version of each rasterized page image is stored in memory.
Because contone colour images are reproduced by stochastic dithering, but black text and line graphics are reproduced directly using dots, the compressed image format contains a separate foreground bi-level black layer and background contone colour layer. The black layer is composited over the contone layer after the contone layer is dithered. If required, a final layer of tags (in IR or black ink) is optionally added to the image for printout.
Dither matrix selection regions in the image description are rasterized to a contone-resolution bi-lev bitmap which is losslessly compressed to negligible size and which forms part of the compressed image. The IR layer of the printed page optionally contains encoded tags at a programmable density.
Each compressed image is transferred to the PEC integrated circuit 190 where it is then stored in a memory buffer 195. The compressed image is then retrieved and fed to an image expander 196 in which images are retrieved. If required, any dither may be applied to any contone layer by a dithering means 197 and any black bi-level layer may be composited over the contone layer by a compositor 198 together with any infrared tags which may be rendered by the rendering means 199. The PEC integrated circuit 190 then drives the integrated circuits of the printhead chips 57 to print the composite image data at step 200 to produce a printed image 201.
The process performed by the PEC integrated circuit 190 may be considered to consist of a number of distinct stages. The first stage has the ability to expand a JPEG-compressed contone CMYK layer. In parallel with this, bi-level IR tag data can be encoded from the compressed image. The second stage dithers the contone CMYK layer using a dither matrix selected by a dither matrix select map and, if required, composites a bi-level black layer over the resulting bi-level K layer and adds the IR layer to the image. A fixative layer is also generated at each dot position wherever there is a need in any of the C, M, Y, K, or IR channels. The last stage prints the bi-level CMYK+IR data through the printhead assembly 50.
The PEC integrated circuit 190 effectively performs four basic levels of functionality:
These functions are now described in more detail with reference to
The PEC integrated circuit 190 incorporates a simple micro-controller CPU core 204 to perform the following functions:
In order to perform the image expansion and printing process, the PEC integrated circuit 190 includes a high-speed serial interface 208 (such as a standard IEEE 1394 interface), a standard JPEG decoder 209, a standard Group 4 Fax decoder 210, a custom half-toner/compositor (HC) 211, a custom tag encoder 212, a line loader/formatter (LLF) 213, and a printhead interface 214 (PHI) which communicates with the printhead chips 57. The decoders 209 and 210 and the tag encoder 212 are buffered to the HC 211. The tag encoder 212 allocates infrared tags to images.
The print engine function works in a double-buffered manner. That is, one image is loaded into the external DRAM 207 via a DRAM interface 215 and a data bus 216 from the high-speed serial interface 208, while the previously loaded image is read from the
DRAM 207 and passed through the print engine process. When the image has been printed, the image just loaded becomes the image being printed, and a new image is loaded via the high-speed serial interface 208.
At the aforementioned first stage, the process expands any JPEG-compressed contone (CMYK) layers, and expands any of two Group 4 Fax-compressed bi-level data streams. The two streams are the black layer and a matte for selecting between dither matrices for contone dithering. At the second stage, in parallel with the first, any tags are encoded for later rendering in either IR or black ink.
Finally, in the third stage the contone layer is dithered, and position tags and the bi-level spot layer are composited over the resulting bi-level dithered layer. The data stream is ideally adjusted to create smooth transitions across overlapping segments in the printhead assembly and ideally it is adjusted to compensate for dead nozzles in the printhead assemblies. Up to six channels of bi-level data are produced from this stage.
However, it will be understood that not all of the six channels need be activated. For example, the printhead modules 55 may provide for CMY only, with K pushed into the CMY channels and IR ignored. Alternatively, the position tags may be printed in K if IR ink is not employed. The resultant bi-level CMYK-IR dot-data is buffered and formatted for printing with the integrated circuits of the printhead chips 57 via a set of line buffers (not shown). The majority of these line buffers might be ideally stored on the external DRAM 207. In the final stage, the six channels of bi-level dot data are printed via the PHI 214.
The HC 211 combines the functions of half-toning the contone (typically CMYK) layer to a bi-level version of the same, and compositing the spot1 bi-level layer over the appropriate half-toned contone layer(s). If there is no K ink, the HC 211 functions to map K to CMY dots as appropriate. It also selects between two dither matrices on a pixel-by-pixel basis, based on the corresponding value in the dither matrix select map. The input to the HC 211 is an expanded contone layer (from the JPEG decoder 205) through a buffer 217, an expanded bi-level spot1 layer through a buffer 218, an expanded dither-matrix-select bitmap at typically the same resolution as the contone layer through a buffer 219, and tag data at full dot resolution through a buffer (FIFO) 220.
The HC 211 uses up to two dither matrices, read from the external DRAM 207. The output from the HC 211 to the LLF 213 is a set of printer resolution bi-level image lines in up to six colour planes. Typically, the contone layer is CMYK or CMY, and the bi-level spot1 layer is K. Once started, the HC 211 proceeds until it detects an “end-of-image” condition, or until it is explicitly stopped via a control register (not shown).
The LLF 213 receives dot information from the HC 211, loads the dots for a given print line into appropriate buffer storage (some on integrated circuit (not shown) and some in the external DRAM 207) and formats them into the order required for the integrated circuits of the printhead chips 57. More specifically, the input to the LLF 213 is a set of six 32-bit words and a Data Valid bit, all generated by the HC 211.
As previously described, the physical location of the nozzles 150 on the printhead chips is in two offset rows 151, which means that odd and even dots of the same colour are for two different lines. In addition, there is a number of lines between the dots of one colour and the dots of another. Since the six colour planes for the same dot position are calculated at one time by the HC 211, there is a need to delay the dot data for each of the colour planes until the same dot is positioned under the appropriate colour nozzle. The size of each buffer line depends on the width of the printhead assembly. A single PEC integrated circuit 190 may be employed to generate dots for up to 16 printhead chips 57 and, in such case, a single odd or even buffer line is therefore 16 sets of 640 dots, for a total of 10,240 bits (1280 bytes).
The PHI 214 is the means by which the PEC integrated circuit 190 loads the printhead chips 57 with the dots to be printed, and controls the actual dot printing process. It takes input from the LLF 213 and outputs data to the printhead chips 57. The PHI 214 is capable of dealing with a variety of printhead assembly lengths and formats.
A combined characterization vector of each printhead assembly 50 and 51 can be read back via the serial interface 205. The characterization vector may include dead nozzle information as well as relative printhead module alignment data. Each printhead module can be queried via a low-speed serial bus 221 to return a characterization vector of the printhead module.
The characterization vectors from multiple printhead modules can be combined to construct a nozzle defect list for the entire printhead assembly and allows the PEC integrated circuit 190 to compensate for defective nozzles during printing. As long as the number of defective nozzles is low, the compensation can produce results indistinguishable from those of a printhead assembly with no defective nozzles.
Some of the features of a pagewidth printhead that incorporates the chip and the print engine controller which have been described above are summarized as follows:
1. The printhead will normally have at least four color channels.
2. The printhead will normally incorporate at least 1400 ink delivery nozzles per inch of print width for each color.
3. The printhead may incorporate a total of at least 50,000 nozzles.
4. The dot printing processing rate and the drop deposition rate of the printhead may be of the order of 109 sec−1 or greater.
5. The volume deposited per drop may be of the order of 2×10−12 l or less.
6. The energy level expenditure per drop ejection may be of the order of 200×10−9 J. or less.
It will be understood that the constructional and operating principles of the capping mechanism of the present invention may be realised with various embodiments. Thus, variations and modifications may be made in respect of the embodiments as specifically described above by way of example.
This application is a continuation of U.S. application Ser. No. 11/003,614 filed Dec. 6, 2004 all of which is herein incorporated by reference.
| Number | Date | Country | |
|---|---|---|---|
| Parent | 11003614 | Dec 2004 | US |
| Child | 12834900 | US |
