Patent Application
20130236196
Embodiments described herein relate to an image processing apparatus, a developer cartridge, and an image forming method.
There exists an image processing apparatus wherein, in order to realize resource conservation, an erasable developer is used to form an image on a sheet, and, after use of the sheet, the image on the sheet is erased by an erasing device. However, an issue arises when using an erasable developer, in that different lots of developer may have different appropriate values for the fixing temperature and the voltage applied on the photosensitive drum, as well as a different threshold temperature for erasing the image.
To address these variables, there has been proposed using correction values stored in a memory in the toner cartridge, and, when the image is formed, the correction values are read and applied to correct the fixing temperature, the voltage applied on the photosensitive drum, etc.
However, with this technology, no consideration is made for the erasable developer, and it is impossible to modify the erasing temperature.
Consequently, there is a need for an image processing apparatus, a developer cartridge, and an image forming method that can correct the image forming conditions and the image erasing conditions related to the use of erasable developer.
In general, according to one embodiment, the image processing apparatus, the developer cartridge and the image forming method will be explained in detail with reference to the drawings.
As an embodiment of the present disclosure, there is provided an image processing apparatus having a sheet feeding unit that feeds sheets, an image forming section that forms developer image including a developer supply section for supplying a developer, a identification element that stores the image forming information containing the information about whether the developer accommodated in the developer supply section is an erasable developer, a identification element detecting unit that reads the image forming information from the identification element, and a control section that forms the image on the basis of the image forming information read from the identification element.
The image processing apparatus of the present embodiment has a sheet feeding unit that feeds sheets, an image forming section that forms the developer image, including a developer supply section for supplying a developer, a identification element that stores the image forming information containing information about whether the developer accommodated in the developer supply section is an erasable developer, a identification element detecting unit that reads the image forming information from the identification element, and a control section that forms the image on the basis of the image forming information read from the identification element.
For example, the control panel 203 has a touch panel as the input/output section for displaying a graphical user interface.
When the start button 203A is pressed, a signal indicating the start of an image forming session is sent to the control section 200.
The automatic original feeding device 11 is arranged in a free opening/closing manner on the upper side of the main body of the image processing apparatus 1. The automatic original feeding device 11 has an original document or sheet transporting mechanism that fetches the original sheets, one sheet at a time, from a sheet feeding tray, and transports the original to a sheet discharge tray.
The automatic original feeding device 11 uses its original transporting function to transport each original sheet to the original reading section of the image reading section 12. Here, one may also adopt a scheme in which the automatic original feeding device 11 is opened and the original is set on the original table of the image reading section 12.
The image reading section 12 has a carriage equipped with an exposure lamp for exposure of the original and a first reflective mirror, plural second reflective mirrors that can be driven to move corresponding to the movement of the carriage, a lens block, and a CCD (Charge Coupled Device) of the image reading sensor, as are known in the art.
The carriage is at still in the original reading section or it is driven to make reciprocal movement below the original table, and the light of the exposure lamp reflected from the original is reflected by the first reflective mirror. Then, the light reflected from the first reflective mirror is reflected by the plural second reflective mirrors to the lens block. The lens block then changes the magnification rate of the reflected light, and then outputs it to the CCD. The CCD converts the incident light to an electric signal that is then output as an image signal to the image forming section 13.
Referring to the image forming section of the apparatus shown in
The erasable developer contains coloring compound, developing agent, and decoloring agent. The coloring compound is, e.g., a leuco dye. The developing agent is, e.g., one or more phenol compounds. The decoloring agent is a substance that is miscible with the coloring compound when heated, and it has no affinity to the developing agent.
The erasable developer works as follows: coloration takes place due to the reaction between the coloring compound and the developing agent to form bonds therebetween resulting in a colored combined or bonded developer-ink compound, but when the developer-ink compound is heated to above the decoloring temperature, the bonds between the coloring compound and the developing agent are broken, and the developer will bond or bind with an erasing reagent, resulting in the image becoming clear or un-colored.
The laser irradiating unit 20A has a laser beam irradiated on the photosensitive drum 20B on the basis of an image signal corresponding to an image on an original sheet read in the reading section to form an electrostatic latent image on the photosensitive drum 20B. The developer feeding unit 20C feeds the developer to the photosensitive drum 20B to forma developer image from the electrostatic latent image.
The sheet feeding unit 15 fetches the sheets, one at a time, from the sheet feeding cassette and transports the sheet to the sheet transporting passage. The sheet transporting passage transports the sheet to the transcribing section 14.
The transcribing section 14 has a transcribing belt 14B and a transcribing roller 14A. The transcribing belt 14B receives the developer image from the photosensitive drum 20B thereon and carries the image on the belt to the transcribing roller 14A. The transcribing roller 14A applies a voltage and transfers the developer image carried on the transcribing belt onto the transported sheet.
The image processing apparatus 1 has a fixing device 14C located downstream of the transcribing roller 14A in the sheet transporting direction of the transcribing section 14. The fixing device 14C fixes the developer image on the sheet using heat and pressure.
The sheet P discharged from the sheet discharging port is stacked on top of any prior printed sheets in the sheet discharge tray 16
The image processing apparatus 1 has a read section 31 arranged downstream in the sheet transporting direction of the sheet feeding unit 15 while upstream in the sheet transporting direction of the transcribing section 14, and an erasing section 32 arranged downstream in the sheet transporting direction of the read section 31 while upstream in the sheet transporting direction of the transcribing section 14.
The read section 31 has a scanner for reading the image on both sides of the sheet. The image processing apparatus 1 determines a quality of the sheet, in particular whether there is an image on the sheet, by use of the read section 31. The image processing apparatus 1 can temporarily store the image read by the read section 31 in a RAM or other memory.
The erasing section 32 has a pair of erasing devices arranged at positions facing each other with the sheet transporting passage 18 sandwiched between them. The erasing devices each have a heating section for heating the sheet to a temperature above the temperature needed to erase an image on the sheet, the temperature determined based on a quality of the sheet, in particular an indicia of the properties of the developer used to print the image. In the erasing mode, the image processing apparatus 1 heats the sheet transported through the erasing section 32 to above the erasing temperature of the image thereon to erase the image formed from the erasable developer on the sheet.
The developer cartridge 201 has an identification element therewith that shows the type of the developer disposed therein. An example, the identification element is a wireless tag 110. However, the present disclosure is not limited thereto, and other identifying elements, including re-writable elements having memory, or specific use cartridges having a permanent indicia, and such cartridges will require refilling by developer have the same properties of a developer previously present in the cartridge, are specifically contemplated.
The image processing apparatus 1 has an identification element detecting device that detects the type of the developer cartridge 201 on the basis of the identification element.
When the developer cartridge 201 has the wireless tag 110 as the identification element, the image processing apparatus 1 has a reader/writer 120 as the identification element detecting device. This reader/writer can read/write data from/to the wireless tag 110 at the position in the image processing apparatus 1 where it can carry out communication with the wireless tag 110.
The types of information accommodated in the wireless tag 110 include, e.g., the information related to yes/no of decoloration ability of the developer, the information related to the type of the non-decoloring developer, the information related to the color, the information related to the use history, the developer cartridge identification information, such as the lot number, etc., the image forming information, such as the fixing temperature, the developer replenishment time, the voltage applied on the photosensitive drum, or other indicia of a property of the developer and a property of the image, such as the conditions required to erase an image formed with the developer.
The wireless tag 110 may also accommodate the correction value of the fixing temperature, the correction value of the developer replenishment time, and the correction value of the voltage applied on the photosensitive drum instead of the fixing temperature, developer replenishment time and the voltage applied on the photosensitive drum, the correction values being calibrated to a standard value known or stored in the image processing unit.
When the developer is an erasable developer, the wireless tag 110 also records the temperature of the developer required to erase an image formed using the developer.
The identification element may be the wireless tag 110. However, the present disclosure is not limited thereto.
The image processing apparatus 1 has an identification element detecting device that detects the type of the developer corresponding to the identification element located on or in the developing unit 404 on the basis of the identification element.
When the developing unit 404 has the wireless tag 110 as the identification element, the image processing apparatus 1 has the reader/writer 120 as the identification element detecting device that can read/write the wireless tag 110 at the position in the image processing apparatus 1 where it is possible to carry out communication with the wireless tag 110. The unit shown above in
For example, the wireless tag 110 accommodates the following information: the information related to decolorable/non-decolorable developer, the information related to the color, the information related to the use history, the lot number and other developer identification information.
The wireless tag 110 accommodates the image forming information related to the fixing temperature, the developer replenishment time, the voltage applied on the photosensitive drum, etc.
The wireless tag 110 may also accommodate the correction value of the fixing temperature, the correction value of the developer replenishment time, and the correction value of the voltage applied on the photosensitive drum instead of the fixing temperature, the developer replenishment time and the voltage applied on the photosensitive drum.
The wireless tag 110 also accommodates the decoloration temperature when the developer is an erasable developer.
When the structure has the developing unit 404 or the photosensitive drum unit 403 separated from the process unit 401, the wireless tag 110 as an identification element may be arranged in the developing unit 404 and the photosensitive drum unit 403.
The reader/writer 120 has a read/write control section 126 that controls the communication with the wireless tag 110 and controls the various hardware units connected with it, a modulating section 122 that modulates the signal output from the read/write control section 126, a transmission amplifier 123 that amplifies the modulated signal and sends the amplified signal via a circulator 131 to the antenna 121, a reception amplifier 124 that amplifies the modulated electromagnetic wave received from the each antenna via the circulator 131, a demodulating section 125 that demodulates the received modulated signal, and an interface 130 that is connected to the control section of the image processing apparatus 1 and carries out data exchange. Here, the read/write control section 126 has a CPU 127, and a ROM 128 as well as a RAM 129 for accommodating the data.
The main CPU 501 is connected to the following parts equipped in the image processing apparatus 1 to control them: a print CPU 505, a scan CPU 508, a driving controller 511 and the reader/writer 120.
The print CPU 505 controls the following parts connected to it: a printing engine 506 that carries out image formation, and the process unit 401 containing a transcribing device.
The scan CPU 508 controls the CCD driving circuit 509 that drives the CCD 510. The output of the CCD 510 is output to the image forming section.
The driving controller 511 controls the recording media transporting mechanism (not shown).
The memory device 502 has the lot number table 502A that accommodates the decoloration temperature for each lot number of the erasable developer.
As an example of the various data, the type is “erasable”, the fixing temperature is “150° C.”, the developer replenishment time is “10 sec”, and the applied voltage is “240 V”.
In step 802, the image processing apparatus 1 computes the correction value of the image forming information. This correction value is computed by determining the difference between the value of the current image forming information and the value of the image forming information read from the identification element.
In step 803, the image processing apparatus 1 carries out warming up to heat up the temperature of the fixing device 14C to the fixing temperature.
In step 804, the image processing apparatus 1 corrects the image forming condition by the computed correction value.
In step 805, the image processing apparatus 1 determines whether there is a print instruction. When the image processing apparatus 1 determines there exists the print instruction, it goes to step 806. On the other hand, if it is determined that there is no print instruction, it returns to step 805.
In step 806, the image processing apparatus 1 determines whether the type of the developer is an erasable developer. If the image processing apparatus 1 determines that the type of the developing material is an erasable developer, it goes to step 807. If it does not determine the type of the developing material is an erasable developer, it goes to step 808.
In step 807, the image processing apparatus 1 forms an image with a mark indicating formation of the image by an erasable developer and the lot number of the developer read from the identification element in yellow color or other color that does not stand out.
In step 808, the image processing apparatus 1 forms the image from the print data on the sheet, and it then returns to step 805.
In step 902, the image processing apparatus 1 reads the images on the sheet by the read section 31. More specifically, it reads the mark and the lot number.
In step 903, the image processing apparatus 1 determines whether there is a mark formed as an image which was made using erasable developer. If the image processing apparatus 1 determines that there is the mark, it goes to step 904. On the other hand, if it does not determine that there is a mark, it goes to step 905.
In step 904, the image processing apparatus 1 uses the erasing section 32 to erase the image on the sheet at the erasing temperature read from the identification element, and it then returns to step 901.
In step 905, the image processing apparatus 1 carries out expulsion of the sheet as a discarded sheet, and it then returns to step 901.
As explained above, the image processing apparatus 1 has a sheet feeding unit 15 that feeds the sheet, the image forming section 13 that has a developer feeding section that feeds the developer and that forms the developer image, a identification element, which is arranged in the developing material feeding section and which stores the image forming information of the developer when the accommodated developer is an erasable developer, a identification element detecting unit that reads the image forming information from the identification element, and a control section that forms the image on the basis of the image forming information read from the identification element.
Consequently, it can display an effect that it is possible to correct the image forming condition also for the erasable developer.
While certain embodiments have been described, these embodiments have been presented by way of example only, and are not intended to limit the scope of the inventions . Indeed, the novel embodiments described herein may be embodied in a variety of other forms; furthermore, various omissions, substitutions and changes in the form of the embodiments described herein may be made without departing from the spirit of the inventions. The accompanying claims and their equivalents are intended to cover such forms or modifications as would fall within the scope and spirit of the inventions.
This application is based upon and claims the benefit of priority from U.S. Provisional Patent Application No. 61/609,866, filed on Mar. 12, 2012; the entire contents of which are incorporated herein by reference.
| Number | Date | Country | |
|---|---|---|---|
| 61609866 | Mar 2012 | US |
