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31. 发明专利

JP2001315352A INK-JET RECORDING DEVICE 失效
公开(公告)号：JP2001315352A
公开(公告)日：2001-11-13
申请号：JP2000133893
申请日：2000-05-02
申请人： CANON KK
发明人： TAKAGI SHINJI , IKEDA TETSUTO , SATO TOMONORI , TAKAHASHI KATSUHIKO , SAITO KENICHI , YANO KENTARO , INUI TOSHIJI , KATO MASAO
IPC分类号： B41J2/175 , B41J2/05 , B41J2/17
摘要： PROBLEM TO BE SOLVED: To detect the non-ejection state of a nozzle efficiently and certainly in a short time, and to cut back wasteful ink consumption amount in the case a nozzle is in the non-ejection state. SOLUTION: In the case the non-ejection state of a nozzle is detected, after executing a recovery process, detecting operation of the non-ejection state is executed again only for the nozzle with the non-ejection state detected.

32. 发明专利

JP2001315351A RECOVERY DEVICE AND METHOD FOR INK-JET RECORDING DEVICE 失效
公开(公告)号：JP2001315351A
公开(公告)日：2001-11-13
申请号：JP2000133892
申请日：2000-05-02
申请人： CANON KK
发明人： INUI TOSHIJI , YANO KENTARO , KATO MASAO , SAITO KENICHI , TAKAHASHI KATSUHIKO , IKEDA TETSUTO , TAKAGI SHINJI , SATO TOMONORI
IPC分类号： B41J2/175 , B41J2/05 , B41J2/165
摘要： PROBLEM TO BE SOLVED: To recover a non-ejection nozzle with the minimum necessary ink consumption. SOLUTION: A recovery method for an ink-jet recording device for forming an image using a recording head with a plurality of nozzles for ejecting ink droplets, comprising a first step of detecting the non-ejection state of the nozzles, and a second step of executing a recovery process, which can vary depending on the non-ejection state of the nozzles detected in the first step, is provided.

33. 发明专利

JP2001315347A INK JET RECORDING DEVICE, RECOVERY METHOD AND RECORDING METHOD 失效
公开(公告)号：JP2001315347A
公开(公告)日：2001-11-13
申请号：JP2000133890
申请日：2000-05-02
申请人： CANON KK
发明人： YANO KENTARO , INUI TOSHIJI , KATO MASAO , TAKAHASHI KATSUHIKO , SAITO KENICHI , TAKAGI SHINJI
IPC分类号： B41J2/165 , B41J2/05 , B41J2/175
摘要： PROBLEM TO BE SOLVED: To provide an ink-jet recording device, a recovery method, and a recording method, capable of recording a high quality image without deteriorating the throughput of the recording device by optimally setting the period for detecting the existence or absence of abnormality in the ink ejection state in the recording head and the recovery operation period for recovering the ink ejection state of the recording head. SOLUTION: In the case abnormality is detected in the ink ejection state of a recording head 85 during a recording operation with the drive of the recording head 85, a recovery operation is executed for recovering the ink ejection state in the recording head 85 after waiting for a non-recording operation period without the drive of the recording head 85.

34. 发明专利

JP2001125341A ELECTROPHOTOGRAPHIC IMAGE FORMING METHOD AND ELECTROPHOTOGRAPHIC IMAGE FORMING DEVICE 失效
公开(公告)号：JP2001125341A
公开(公告)日：2001-05-11
申请号：JP30857899
申请日：1999-10-29
申请人： CANON KK
发明人： SAKO SHUNKAI , TAKAGI SHINJI , TSUJI HARUYUKI
IPC分类号： G03G15/02
摘要： PROBLEM TO BE SOLVED: To provide an electrophotographic image forming method and an electrophotographic image forming device where image failure due to wear of an electrophotographic photoreceptor surface is not generated even when a magnetic brush electrifying method is utilized. SOLUTION: In the electrophotographic image forming method, torque of an image carrier with a magnetic brush is >=0.98 N.cm and =0.98 N.cm and

35. 发明专利

JP2000122325A ELECTROPHOTOGRAPHIC PHOTORECEPTOR AND ELECTROPHOTOGRAPHIC DEVICE USING THE SAME 失效
公开(公告)号：JP2000122325A
公开(公告)日：2000-04-28
申请号：JP29080898
申请日：1998-10-13
申请人： CANON KK
发明人： TAKAGI SHINJI , YOSHIHARA YOSHIYUKI , MORIKAWA YOSUKE , ASANO KUMIKO
IPC分类号： G03G15/02 , G03G5/147
摘要： PROBLEM TO BE SOLVED: To make it possible to suppress flaws generated when an electrostatic charge carrier leaked from a magnetic brush is pressed thereto at the time of transfer by mainly forming the surface layer of an electrophotographic photoreceptor of a three-dimensionally crosslinked and deposited resin and specifying the hardness thereof. SOLUTION: The surface layer of this electrophotographic photoreceptor is mainly composed of the three-dimensionally crosslinked and deposited resin. The curve indicating the relation between the hardness H and the indentation depth (h) of an indenter in a surface film property test to the surface layer does not have an inflection point and the universal hardness value is >=200. If the layer forming the surface layer is a single layer structure, the thickness of the single layer photosensitive layer is 5 to 100 μm and is more preferably 10 to 60 μm. A charge generating material or charge transfer material is incorporated at a ratio of 20 to 80 wt.%, more preferably 30 to 70 wt.%. In the case of a laminated structure the film thickness of the charge generating layer is 0.001 to 6 μm, more preferably 0.01 to 2 μm. The content of the charge generating material is 10 to 100 wt.% more preferably 40 to 100 wt.%.

36. 发明专利

JPH11184131A ELECTROPHOTOGRAPHIC IMAGE FORMING METHOD, ELECTROPHOTOGRAPHIC DEVICE AND ELECTROPHOTOGRAPHIC PHOTORECEPTOR 失效
公开(公告)号：JPH11184131A
公开(公告)日：1999-07-09
申请号：JP34906897
申请日：1997-12-18
申请人： CANON KK
发明人： SAKO SHUNKAI , TAKAGI SHINJI
IPC分类号： G03G9/08 , G03G5/147
摘要： PROBLEM TO BE SOLVED: To provide an electrophotographic image forming method by which image noises or image streaks are not produced even when an image carrying body having a surface layer of high hardness produced by a polymn. process using polymerizable monomers and oligomers is used to repeat the image forming processes, and to provide an electrophotographic device to be used for this method, and to provide an electrophotographic photoreceptor to be used for the method and the device. SOLUTION: In this electrophotographic image forming method, an electrostatic latent image formed on an image carrier body is developed with a toner. The image carrying body has a surface layer of high hardness produced by polymn. of polymerizable monomers and oligomers. The toner is prepared by fixing alumina fine particles on the surfaces of the toner particles and then externally adding fine particles having /g BET specific surface area. The electrophotographic device uses the method above described, and the electrophotographic photoreceptor is used for the method and the device.

37. 发明专利

JPH10323993A DETECTION SYSTEM, LIQUID JET RECORDER EMPLOYING IT, LIQUID HOUSING CONTAINER, AND VARIABLE QUANTITY LIGHT RECEIVING SYSTEM 失效
公开(公告)号：JPH10323993A
公开(公告)日：1998-12-08
申请号：JP1178598
申请日：1998-01-23
申请人： CANON KK
发明人： HIRAMATSU SOICHI , TAKAGI SHINJI , WATABE TADAO , SATO OSAMU , UDAGAWA KENTA
IPC分类号： B41J2/175 , G01F23/292
摘要： PROBLEM TO BE SOLVED: To enhance the detection accuracy of the presence of a liquid container and the presence of internal liquid by providing the liquid container, between the light emitting part and the light receiving part of an optical means, with a part for diffusing the reflected light from the outer wall face of the container toward the light receiving part. SOLUTION: An optical unit comprising a light emitting element 15 and a light receiving element 16 for detecting the residual quantity of ink and the presence of an ink tank is disposed on the side of an apparatus to be recovered. A prism 180 for detecting the residual quantity of ink and a concave reflective part 190, i.e., a diffusing part, for detecting the presence of an ink tank is disposed on the bottom of an ink tank 7. Since the reflected light of a light 26 emitted from the light emitting element 15 is diffused by another optical path 27, the light having no relation to the detection of the presence of ink and entering into the light receiving element 16 is suppressed and contribution of reflected light reaching the light receiving element 16 can be reduced. Furthermore, the light is reflected surely because the concave polyhedral part 190 serves to prevent deformation of boundary faces 180A, 180B at the time of molding.

38. 发明专利

JPH09262982A METHOD AND DEVICE FOR INK-JET PRINTING 失效
公开(公告)号：JPH09262982A
公开(公告)日：1997-10-07
申请号：JP7261596
申请日：1996-03-27
申请人： CANON KK
发明人： TAKAGI SHINJI , TAWARAYA HIROYUKI , KASAMATSU TAKEHIKO , TANAKA HIDEKI
IPC分类号： B41J2/05 , B41J2/08 , G06K15/10
摘要： PROBLEM TO BE SOLVED: To contrive a small capacity memory for data used for controlling discharge and nondischarging of ink through a discharge port and to properly enable correspondence even in a draft mode. SOLUTION: One picture element row is divided into scanning of four times of a recording head. A nozzle context is renewably held in nozzle context memory 105 as control data for deciding consent and rejection of discharge of ink through a discharge port. The nozzle context SI and image data DI are calculated and processed in an arithmetic circuit 106 and driving data DO of the recording head 1 are outputted.

39. 发明专利

JPH0966600A RECORDER 失效
公开(公告)号：JPH0966600A
公开(公告)日：1997-03-11
申请号：JP22358695
申请日：1995-08-31
申请人： CANON KK
发明人： TAWARAYA HIROYUKI , TAKAGI SHINJI , KASAMATSU TAKEHIKO , TANAKA HIDEKI
IPC分类号： B41J2/01 , B41J2/05 , B41J2/175 , G06F3/12
摘要： PROBLEM TO BE SOLVED: To accurately count the number of record data by following up the high speed recording operation. SOLUTION: The number of data for discharging ink by inputting via a signal line SD2 in the forward scanning of a recording head and the number of data for discharging ink by inputting via a signal line SD1 in the backward scanning are counted by a counter 405 in terms of the data to be input via the lines (SD1, SD2) according to clock signals (SCK1, SCK2) to two 128-bit shift registers 404, 404 in a recording head having 256 heaters H1 to H256.

40. 发明专利

JPH0946522A IMAGE PROCESSING METHOD, PRINTER AND DISPLAY DEVICE 失效
公开(公告)号：JPH0946522A
公开(公告)日：1997-02-14
申请号：JP19380995
申请日：1995-07-28
申请人： CANON KK
发明人： TANAKA HIDEKI , TAWARAYA HIROYUKI , TAKAGI SHINJI
IPC分类号： B41J2/01 , B41J2/205 , B41J2/21 , B41J2/485 , G06T3/40 , H04N1/23 , H04N1/405
摘要： PROBLEM TO BE SOLVED: To print out an image with high quality by utilizing a high resolution specific to a printer. SOLUTION: In the case of a gradation level obtained from a pixel by pseudo halftone processing, e.g. '1' shown in data (B), dots are generated by any of four kinds of patterns (B-1),..., (B-4) with respect to a printer having a double resolution and any of the 4 kinds of the patterns (B-1),..., (B-4) forming the dots are sequentially selected to make the result corresponding to the data (B).

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