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1. 发明专利

JP2003207938A ELECTROPHOTOGRAPHIC DEVICE AND PROCESS CARTRIDGE 审中-公开
公开(公告)号：JP2003207938A
公开(公告)日：2003-07-25
申请号：JP2002004892
申请日：2002-01-11
申请人： CANON KK
发明人： NAKAMURA KAZUNARI , UESUGI HIROTOSHI , ANAYAMA HIDEKI
IPC分类号： G03G9/087 , G03G5/047 , G03G5/147 , G03G15/08
摘要： PROBLEM TO BE SOLVED: To provide an electrophotographic device by which an excellent characteristic is obtained when an image is repeatedly outputted an high image quality and a high definition image are provided for a long period of time while keeping development property even in an electrophotographic development method using small-diameter toner with high circularity and also to provide a process cartridge. SOLUTION: Toner to be used in a developing means is dry one-component toner, wherein an average particle diameter of the equivalent circles measured by the numbers in the toner is 2-10 μm, and average circularity is 0.950-0.995 and a circularity standard deviation is less than 0.040. The developing means forms a toner layer on an elastic roller with 40 and 60 ASKER C type hardness. While mutually rotating the elastic roller and a photosensitive body, the toner layer is brought into contact with the front surface of the photosensitive body. Then, an electrostatic latent image formed on the photosensitive body is developed with the toner to obtain a toner image through the use of the developing means. Universal hardness is 230 N/mm 2 in the front surface layer of the photosensitive body, in the electrophotographic device and the process cartridge. COPYRIGHT: (C)2003,JPO

2. 发明专利

JP2001166509A ELECTROPHOTOGRAPHIC PHOTORECEPTOR, ELECTROPHOTOGRAPHIC DEVICE AND PROCESS CARTRIDGE 失效
公开(公告)号：JP2001166509A
公开(公告)日：2001-06-22
申请号：JP35326699
申请日：1999-12-13
申请人： CANON KK
发明人： NAKAMURA KAZUNARI , KIKUCHI NORIHIRO , UEMATSU HIRONORI
IPC分类号： G03G5/07 , G03G5/05 , G03G5/06
摘要： PROBLEM TO BE SOLVED: To provide an electrophotographic photoreceptor which has good wear resistance, flaw resistance and deposition resistance, is extremely little in the change and deterioration of photoreceptor characteristics, such as an increase of residual potential in repetitive use and can exhibit stable performance even in the repetitive use. SOLUTION: The surface layer of the electrophotographic photoreceptor which has a photosensitive layer on a conductive base consists of a structure containing a polymer of a hole transportable compound having >=2 chain polymerizable functional groups within the same molecule and containing at least one kind selected from the group consisting of a fluorine atom-containing resin, carbon fluoride and a polyolefinic resin as a lubricating material.

3. 发明专利

JP2000147814A ELECTROPHOTOGRAPHIC SENSITIVE BODY, PROCESS CARTRIDGE AND ELECTROPHOTOGRAPHIC DEVICE 失效
公开(公告)号：JP2000147814A
公开(公告)日：2000-05-26
申请号：JP32305398
申请日：1998-11-13
申请人： CANON KK
发明人： UEMATSU HIRONORI , KIKUCHI NORIHIRO , MARUYAMA AKIO , AMAMIYA SHOJI , SEKIYA MICHIYO , TANAKA HIROYUKI , NAKAMURA KAZUNARI
IPC分类号： G03G5/06 , C08F12/08 , C08F16/12 , C08F20/10 , C08K5/3472 , C08L25/00 , C08L29/10 , C08L33/14 , G03G5/07
摘要： PROBLEM TO BE SOLVED: To provide an electrophotographic sensitive body which has excellent effects on a wear resistance and a scratch resistance and is extremely good in the electrophotographic characteristics such as sensitivity and residual potential and which is able to exhibit stable performance even when it is repeatedly used. SOLUTION: The electrophotographic sensitive body has a photosensitive layer on an electroconductive supporting material, and a charge generating material contained in the photosensitive layer is a phthalocyanine compound. The electrophotographic sensitive body contains one or both of a positive hole transporting compound containing at least two chain polymerizable functions in the same molecule and a cured material obtained by polymerizing or cross- linking the positive hole transporting compound by heat or UV-rays.

4. 发明专利

JPH10246977A ELECTROPHOTOGRAPHIC PHOTORECEPTOR, PROCESS CARTRIDGE, AND ELECTROPHOTOGRAPHIC DEVICE 失效
公开(公告)号：JPH10246977A
公开(公告)日：1998-09-14
申请号：JP5169997
申请日：1997-03-06
申请人： CANON KK
发明人： TAKAGI NORIYUKI , NAKAMURA KAZUNARI
IPC分类号： G03G5/147
摘要： PROBLEM TO BE SOLVED: To obtain a photoreceptor having durability against wear and scratches of the surface due to sliding and to always maintain stable electrophotographic characteristics without increasing the residual potential, by incorporating a resin produced by polymn. of either hydrophilic photosetting monomers or oligomers or both of those into a protective layer. SOLUTION: This electrophotographic photoreceptor consists of a conductive base body and a photosensitive layer and a protective layer formed in this order. The protective layer contains a resin, which is produced by polymn. of either hydrophilic photosetting monomers or oligomers or both of those. When the protective layer is to be formed, such a problem occurs that photopolymerizable monomers and oligomers or initiator radicals moves. To resolve this problem, it is effective to give hydrophilicity to the photopolymerizable monomers and oligomers. As for the binder resin for the protectivelayer to be used, a hydrophilic photosetting monomers and oligomers can be used.

5. 发明专利

JPH10111577A ELECTROPHOTOGRAPHIC PHOTORECEPTOR, PROCESS CARTRIDGE WITH SAME AND ELECTROPHOTOGRAPHIC DEVICE 失效
公开(公告)号：JPH10111577A
公开(公告)日：1998-04-28
申请号：JP20793197
申请日：1997-08-01
申请人： CANON KK
发明人： NAKADA KOICHI , KIKUCHI NORIHIRO , SUZUKI KOICHI , KANAMARU TETSUO , NAKAMURA KAZUNARI
IPC分类号： G03G5/06
摘要： PROBLEM TO BE SOLVED: To ensure superior electrophotographic characteristics and superior scraping resistance by forming a photosensitive layer contg. a specified fluorene compd. and a specified triarylamine compd. SOLUTION: This electrophotographic photoreceptor has a photosensitive layer contg. a fluorene compd. represented by formula I and a triarylamine compd. represented by formula I1 on the substrate. In the formula I, each of R1 and R2 is alkyl, aryl, aralkyl or H, R1 and R2 may form a cyclic group by bonding to each other, each of R3 -R10 is diarylamino, alkyl, aryl, aralkyl, halogen, nitro or H and at least two of R3 -R10 , are diarylamino. In the formula II, each of Ar3 -Ar5 is aryl or a heterocyclic group.

6. 发明专利

JPH10104861A ELECTROPHOTOGRAPHIC PHOTORECEPTOR, PROCESS CARTRIDGE WITH THE SAME AND ELECTROPHOTOGRAPHIC DEVICE 失效
公开(公告)号：JPH10104861A
公开(公告)日：1998-04-24
申请号：JP20793297
申请日：1997-08-01
申请人： CANON KK
发明人： KIKUCHI NORIHIRO , NAKAMURA KAZUNARI , SUZUKI KOICHI , KANAMARU TETSUO , NAKADA KOICHI
IPC分类号： G03G5/06 , G03G5/147
摘要： PROBLEM TO BE SOLVED: To ensure superior electrophotographci characteristics, durability and environmental stability and to avoid cracking and crystallization by forming a photosensitive layer contg. a specified fluorene compd. and a specified stilbene compd. SOLUTION: This electrophotographci photoreceptor has a photosensitive layer contg. a fluorene compd. represented by formula I and a stilbene compd. represented by formula II. In the formula I, each of R1 and R2 is optionally substd. alkyl, etc., each of R3 -R10 is optionally substd. diarylamino, etc., and at least two of R3 -R10 are optionally substd. diarylamino. In the formula II, each of Ar3 and Ar4 is optionally substd. aryl, etc., Ar5 is optionally substd. arylene, etc., each of Ar11 and Ar12 is optionally substd. alkyl, etc., (n) is 1 or 2, and in the case of n=1, R11 and R12 may form a ring by bonding to each other.

7. 发明专利

JPH1048856A ELECTROPHOTOGRAPHIC PHOTORECEPTOR, PROCESS CARTRIDGE WITH SAME AND ELECTROPHOTOGRAPHIC DEVICE 失效
公开(公告)号：JPH1048856A
公开(公告)日：1998-02-20
申请号：JP20950496
申请日：1996-08-08
申请人： CANON KK
发明人： KANAMARU TETSUO , NAKADA KOICHI , KIKUCHI NORIHIRO , NAKAMURA KAZUNARI , SUZUKI KOICHI
IPC分类号： G03G5/05 , G03G5/06
摘要： PROBLEM TO BE SOLVED: To obtain a photoreceptor having high sensitivity and excellent in stability even at the time of repetitive use by incorporating a specified fluorene compd. and a compd. having its max. absorption at a specified wavelength. SOLUTION: This photoreceptor has a photosensitive layer contg. a fluorene compd. represented by the formula and a compd. having its max. absorption at 380-480nm wavelength. The pref. amt. of the fluorene compd. is 5-95wt.%, especially 10-90wt.% of the total amt. of the photosensitive layer. In the formula, each of R1 and R2 is alkyl which may have a substituent, an arom. cyclic group which may have a substituent or H, each of R3 -R10 is diarylamino which may have a substituent, alkyl which may have a substituent, aralkyl which may have a substituent, halogen, nitro or H and two or more of R3 -R10 are diarylamino. The compd. having its max. absorption at 380-480nm wavelength is, e.g. a dye stated in a color index or a hydrazone compd.

8. 发明专利

JPH08123101A ELECTROPHOTOGRAPHIC IMAGE FORMING METHOD, ELECTROPHOTOGRAPHIC DEVICE AND ELECTROPHOTOGRAPHIC UNIT 失效
公开(公告)号：JPH08123101A
公开(公告)日：1996-05-17
申请号：JP25338394
申请日：1994-10-19
申请人： CANON KK
发明人： NAKAMURA KAZUNARI
IPC分类号： G03G5/06 , G03G13/08
摘要： PURPOSE: To stabilize dark part potential and sensitivity and to obviate the occurrence of image defects even at the time of repetitively using under high temp. and high humidity by subjecting an electrophotographic photoreceptor contg. specific azo pigments in photosensitive layers to electrostatic charging, image exposing and developing. CONSTITUTION: This electrophotographic forming method includes an electrostatic charging stage for electrostatically charging the electrophotographic photoreceptor contg, the azo pigments expressed by the formula in the photosensitive layers by direct electrostatic charging, an image exposing stage for forming an electrostatic latent image by subjecting the electrostatically charged electrophotographic photoreceptor to image exposing and a developing stage for developing the electrophotographic photoreceptor formed with the electrostatic latent image. In the formula, Cp1 and Cp2 denote coupler residues. The photoreceptor has the photosensitive layers on a base. The layers formed by laminating a charging generating layer contg. a charge generating material which generates charges by exposing and a charge transfer layer contg. a charge transfer material which transfers the charges are usable as the photosensitive layers. The charge generating layer is formable by coating a coating material prepd. by vapor deposition of the charge generating material of the azo pigments expressed by the formula or dispersing the material together with a suitable binder.

9. 发明专利

JPH06295086A ELECTROPHOTOGRAPHIC SENSITIVE BODY, ELECTROPHOTOGRAPHIC DEVICE WITH THE SAME AND DEVICE UNIT 失效
公开(公告)号：JPH06295086A
公开(公告)日：1994-10-21
申请号：JP28294
申请日：1994-01-06
申请人： CANON KK
发明人： MARUYAMA AKIO , KIKUCHI NORIHIRO , NAKAMURA KAZUNARI , SEKIYA MICHIYO
IPC分类号： G03G5/147
摘要： PURPOSE:To provide an electrophotographic sensitive body having excellent potential characteristics, capable of giving an image having high image quality even after repeated use and also having excellent characteristics with respect to pause memory and transfer memory and to provide an electrophotographic device with the electrophotographic sensitive body and a device unit. CONSTITUTION:In an electrophotographic sensitive body with a photosensitive layer and a protective layer on the electric conductive substrate, the protective layer contains electric conductive particles, fluorine atom-contg. resin particles, a bonding resin and at least one kind of fluorine atom-contg. compd. selected among a fluorine-contg. surfactant, a fluorine-contg. silane coupling agent, fluorine-contg. silicone oil and a fluorine-contg. graft polymer. The objective electrophotographic sensitive body is provided and the objective electrophotographic device with this electrophotographic sensitive body and the objective device unit are provided.

10. 发明专利

JPH0695404A ELECTROPHOTOGRAPHIC SENSITIVE BODY AND ELECTROPHOTOGRAPHIC DEVICE AND FACSIMILE USING THAT 失效
公开(公告)号：JPH0695404A
公开(公告)日：1994-04-08
申请号：JP26792792
申请日：1992-09-11
申请人： CANON KK
发明人： IKESUE TATSUYA , KASHIMURA NOBORU , NAKAMURA KAZUNARI , AMAMIYA SHOJI , YAMAGAMI MASAAKI , SAKO SHUNKAI
IPC分类号： G03G5/05 , G03G5/147 , H04N1/29
摘要： PURPOSE:To obtain an electrophotographic sensitive body having high sensitivity and excellent durability and environmental resistance. CONSTITUTION:This electrophotographic sensitive body has a photosensitive layer and a surface protective layer on a conductive supporting body. (1) The photosensitive layer and/or surface protective layer contains a compd. having l-4 structures A expressed by formula in one molecule, phosphorous-base antioxidant, etc. In formula, R and R are alkyl groups. (2) The photosensitive layer and/or surface protective layer contain antioxidant and charge transfer material. The solar ratio of antioxidant/charge transfer material is larger in the surface protective layer than in the photosensitive layer. (3) The photosensitive layer and/or surface protective layer contain antioxidant having >=50 deg.C melting point. The electrophotographic device and the facsimile use this photosensitive body. Thereby, the obtd. electrophotographic sensitive body has high sensitivity, excellent durability and environmental resistance, and high quality picture images can be obtd. with this photosensitive body even in repeated electrophotographic process.

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