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1. 发明专利

JPH1039525A ELECTROPHOTOGRAPHIC PHOTORECEPTOR 失效
公开(公告)号：JPH1039525A
公开(公告)日：1998-02-13
申请号：JP19750096
申请日：1996-07-26
申请人： KONISHIROKU PHOTO IND
发明人： WATANABE KAZUMASA , FUJIMOTO SHINGO , ABE NAOTO , KITAHARA YOKO , SAKAI EIICHI
IPC分类号： G03G5/05
摘要： PROBLEM TO BE SOLVED: To obtain a photoreceptor excellent in environmental resistance and ozone resistance, not deteriorating its electrification ability and sensitivity even at the time of repetitive use and preventing the image burring of a first copy after the restarting of copying by incorporating a specified compd. SOLUTION: This photoreceptor contains a compd. represented by formula I, II or III. In the formulae I-III, R1 is at the o-position the to OH and is sec. or tert. alkyl, R2 is H, alkyl, halogen, etc. And substituting position of R2 may be at ant of the o-, m- and p-positions to OH, Alk is alkyl, Ar is aryl. The substituting position of COAlK is at the o-, m- or p-position to OH. The substituting position of COAr is at the p-position to OH, and that of CH2 Ar is at the p-position to OH and (n) is an integer of 1-3, preferably 1.

2. 发明专利

JPH09114117A ELECTROSTATIC IMAGE FORMING TRANSLUCENT BASE BODY, ELECTROPHOTOGRAPHIC PHOTORECEPTOR AND IMAGE FORMING METHOD USING IT 失效
公开(公告)号：JPH09114117A
公开(公告)日：1997-05-02
申请号：JP27124595
申请日：1995-10-19
申请人： KONISHIROKU PHOTO IND
发明人： SANO MASARU , MOCHIZUKI FUMITAKA , SAKAI EIICHI
IPC分类号： G03G15/05 , G03G5/10
摘要： PROBLEM TO BE SOLVED: To suppress deformation in a base body and to eliminate generation of image fog by using copolymer of α-methyl styrene and methacrylate or a polymer blend of poly-α-methylstyrene and polymethacrylate for formation. SOLUTION: Formation is carried out by using copolymer of α-methylstyrene and methacrylate or a polymer blend of poly-α-methylstyrene and polymethacrylate. That is, resin consisting of the copolymer of α-methylstyrene and methacrylate or the polymer blend of poly-α-methylstyrene and polymethacrylate is used for a base body material, and as a result, heat resistance can be improved, so that deformation caused by heat in production of a photosensitive body hardly occurs and deterioration in size precision can be suppressed.

3. 发明专利

JPH0968890A ELECTROPHOTOGRAPHIC IMAGE FORMING DEVICE AND METHOD THEREFOR 失效
公开(公告)号：JPH0968890A
公开(公告)日：1997-03-11
申请号：JP22316495
申请日：1995-08-31
申请人： KONISHIROKU PHOTO IND
发明人： SAKAI EIICHI , YASUDA KENICHI , MINEMURA HIROAKI , KITAHARA YOKO , MOCHIZUKI FUMITAKA
IPC分类号： G03G21/00 , G03G5/06 , G03G5/14
摘要： PROBLEM TO BE SOLVED: To obtain an excellent image provided with high sensitivity, together with durability over a long period, by applying the electric charge by AC electric field through a surface side of a conductive supporting body in a cylindrical shape during an electrification stage after development. SOLUTION: This device is constituted that, an organic photoreceptor drum 10 provided with a photosensitive layer laminated on an under coating layer on the conductive supporting body of the cylindrical shape is adopted, the image formed by electrification, the image exposure and development is transferred onto a transfer paper P, the transfer paper P is separated from the photoreceptor drum 10 thereafter, and the photoreceptor drum 10 is cleaned, In the mean time, during the electrification stage by an electrification device 11 after developing by the developing device 13, the electric charge is applied by the AC electric field through the surface side of the photoreceptor drum 10 by a corona electrode 23 connected with an AC power source 24. At this time, the surface electrification potential of the photoreceptor drum 10 is set so as to become between 0 and the electrification potential (equal to or above 500V) of the photoreceptor drum 10. Moreover, a largeness of electrifying is preferably made to the largeness capable of lowering the electrification potential VH below 1/2 VH, on the point of rising the residual potential and increasing dark decay.

4. 发明专利

JPH0968814A ELECTROPHOTOGRAPHIC IMAGE FORMING METHOD AND DEVICE THEREFOR 失效
公开(公告)号：JPH0968814A
公开(公告)日：1997-03-11
申请号：JP22317095
申请日：1995-08-31
申请人： KONISHIROKU PHOTO IND
发明人： MINEMURA HIROAKI , SAKAI EIICHI , YASUDA KENICHI , KITAHARA YOKO , MOCHIZUKI FUMITAKA
IPC分类号： G03G21/10 , G03G5/00 , G03G5/14 , G03G13/00 , G03G13/26 , G03G15/00 , G03G21/00
摘要： PROBLEM TO BE SOLVED: To provide an extremely reliable electrophotographic image forming device and a method therefor by optimizing the layer constitution of a photoreceptor, the forming state of a surface layer and the condition of a cleaning blade abutting on the photoreceptor. SOLUTION: In a blade cleaning system image forming device using a electrophotographic photoreceptor constituted by laminating an intermediate layer and a photoreceptive layer on a conductive supporting body, an intermediate layer coating area and the abutting area of the cleaning blade are wider than the photo-receptive layer coating area of the electrophotographic photo- receptor and at least a part of the abutting area of the cleaning blade out of the photoreceptive layer coating area is constituted so that the intermediate layer exists between the cleaning blade and the conductive supporting body.

5. 发明专利

JPH0934153A ELECTROPHOTOGRAPHIC PHOTORECEPTOR AND IMAGE FORMING PROCESS 失效
公开(公告)号：JPH0934153A
公开(公告)日：1997-02-07
申请号：JP18574895
申请日：1995-07-21
申请人： KONISHIROKU PHOTO IND
发明人： SAKAI EIICHI , YASUDA KENICHI , MINEMURA HIROAKI , KITAHARA YOKO
IPC分类号： G03G5/14
摘要： PROBLEM TO BE SOLVED: To provide a good photoreceptor showing no changes in potential even against repeated use or environmental changes by diluting a specified compd. in a solvent to prepare a coating liquid, applying and drying the liquid to form a base layer, and then forming a photoconductive layer on the base layer. SOLUTION: At least one compd. selected from among metal alkoxide, org. metal chelate and silane coupling agent, is diluted in a solvent to prepare a coating liquid. The coating liquid is applied on a cylindrical base body having >=0.1J/K heat capacity per cm and dried to form a base layer, on which a photoconductive layer is formed to obtain a cylindrical electrophotographic photoreceptor. The thickness of the base layer is between 0.1μm and 4μm. The solvent for dilution is selected from among alcohols, aromatic solvents, ethylene glycols and propylene glycols. The cylindrical electrophotographic photoreceptor laminated with photoconductive layers on the base layer, which is formed by coating and drying, is used for digital exposure and reverse development. Thus, a good image with high image quality and a high density without fog or image defects such as black spots and white spots can be obtd.

6. 发明专利

JPH08328273A ELECTROPHOTOGRAPHIC PHOTORECEPTOR, IMAGE FORMING METHOD AND IMAGE FORMING DEVICE 失效
公开(公告)号：JPH08328273A
公开(公告)日：1996-12-13
申请号：JP13671195
申请日：1995-06-02
申请人： KONISHIROKU PHOTO IND
发明人： MATSUURA KATSUMI , ASANO MASANARI , SAKAI EIICHI
IPC分类号： G03G15/01 , G03G5/05 , G03G21/00
摘要： PURPOSE: To obtain an electrophotographic photoreceptor less liable to the wear and damage of the surface layer in a process for repeatedly forming images, less liable to the deterioration of the electrophotographic performance due to fatigue and stably giving a high density clear color image, and to provide a color image forming method and a color image forming device. CONSTITUTION: In this image forming method, plural toner images are formed in a superposed state on an electrophotographic photoreceptor with a substrate during one revolution and the toner images are simultaneously transferred and fixed on a transfer material to form the objective color image. This electrophotographic photoreceptor used in this image forming method has a layer contg. inorg. particles in the top layer.

7. 发明专利

JPH0895277A ELECTROPHOTOGRAPHIC PHOTORECEPTOR AND IMAGE FORMING DEVICE 失效
公开(公告)号：JPH0895277A
公开(公告)日：1996-04-12
申请号：JP22681894
申请日：1994-09-21
申请人： KONISHIROKU PHOTO IND
发明人： MINEMURA HIROAKI , YASUDA KENICHI , KITAHARA YOKO , SAKAI EIICHI
IPC分类号： G03G5/14
摘要： PURPOSE: To ensure a long pot life of a coating soln. and to produce an electrophotographic photoreceptor preventing the occurrence of voids or black spots, fogging, the lowering of density and transfer memory. CONSTITUTION: When a middle layer and a photosensitive layer are laminated on an electrically conductive substrate to obtain an electrophoto-graphic photoreceptor, the middle layer is formed with a material contg. a metallic chelate compd. of Ti or Al having the chelate group of acetoacetic ester or β-diketone and an alkoxy group and a silane coupling agent having org. functional groups represented by the formula as terminal groups. The objective electrophotographic photoreceptor is obtd. and the objective electrophotographic device using this photoreceptor is provided.

8. 发明专利

JPH07333954A IMAGE FORMING METHOD 失效
公开(公告)号：JPH07333954A
公开(公告)日：1995-12-22
申请号：JP12535994
申请日：1994-06-07
申请人： KONISHIROKU PHOTO IND
发明人： HANEDA SATORU , SAKAI EIICHI , MATSUURA KATSUMI
IPC分类号： G03G15/05 , G03G5/08 , G03G5/12 , G03G15/01
摘要： PURPOSE:To stably obtain high image quality without causing environmental pollution due to ozone, deterioration of image quality, image blur, etc., due to fatigue and deterioration of a photoreceptor by forming toner images superposing on a photosensitive layer by one rotation of the photoreceptor. CONSTITUTION:Positive electrification is uniformly applied to the surface of the photosensitive layer of the photoreceptor 10 by an electrifier 11 (Y), then a Y image signal is outputted to an exposure unit 12 (Y) from an external signal, an electrostatic latent image consisting of dots is formed and developed in non-contact state by a developing unit 13 (Y). Subsequently, uniform positive electrification is further applied to the Y toner image on the photoreceptor 10 by an electrifier 11 (M), and it is exposed by an exposure unit 12 (M), to which an M image electric signal is applied, so that an M-electrostatic latent image consisting of dots is formed. In the same way, the latent image is developed in non-contact state by a developing unit 13 (M), and the M-toner image is formed superposing on the Y toner image. By the same process, a C toner image and a K toner image are formed and superimposed in order, thus a color toner image is formed on the surface of the photosensitive layer in the one passage.

9. 发明专利

JPH06332207A ELECTROPHOTOGRAPHIC SENSITIVE BODY AND ELECTROPHOTOGRAPHIC METHOD 失效
公开(公告)号：JPH06332207A
公开(公告)日：1994-12-02
申请号：JP12427293
申请日：1993-05-26
申请人： KONISHIROKU PHOTO IND
发明人： KUDO KOICHI , MINEMURA HIROAKI , SAKAI EIICHI , MIYAKE KAN
IPC分类号： G03G5/05 , G03G5/06
摘要： PURPOSE:To provide the photosensitive body having high crack resistance and high-sensitivity characteristics by incorporating a specific compd. as the charge transfer material of a charge transfer layer and a polycarbonate resin and specific biphenyl deriv. as a binder resin into the photosensitive body. CONSTITUTION:An intermediate layer (UCL), a charge generating layer (CGL) and the charge transfer layer (CTL) are laminated in this order onto a conductive base and the compd. expressed by formula I specified in structure details is incorporated as the charge transfer material (CTM) into the CTL. The polycarbonate resin is incorporated and the biphenyl deriv. expressed by formula II is incorporated as the binder resin into the photosensitive body. In the formula I, Ar2 to Ar4 denote hydrogen atoms, -[(C6H5-k)(R3)3] (k: an integer from 9 to 5), substd. or unsubstd. condensed polycyclic hydrocarbon groups, etc.; R1 to R3 denote hydrogen atoms, substd. or unsubstd. alkyl groups, phenyl groups, alkoxy groups, etc. In the formula II, R4, R5' denote hydrogen atoms, halogen atoms or alkyl groups or phenyl groups; (n), (m) denote an integer from 0 to 5.

10. 发明专利

JPH0563792B2 失效
公开(公告)号：JPH0563792B2
公开(公告)日：1993-09-13
申请号：JP31516186
申请日：1986-12-30
申请人： KONISHIROKU PHOTO IND
发明人： SAKAI EIICHI , TAKEUCHI SHIGEKI , SUZUKI YASUO , FUJIMAKI YOSHIHIDE
IPC分类号： G03G15/01 , G03G13/01

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