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1. 发明专利

DE602006001668D1 未知
公开(公告)号：DE602006001668D1
公开(公告)日：2008-08-21
申请号：DE602006001668
申请日：2006-03-17
申请人： RICOH KK
发明人： ISHIURA TOMOAKI , MIYAZAKI KUNIHIKO , ICHIFUJI KATSUMI
IPC分类号： G01N21/952 , G01B11/30 , G01N21/88

2. 发明专利

JP2002149006A ELECTROPHOTOGRAPHIC SENSITIVE BODY, AND ELECTROPHOTOGRAPHIC DEVICE AND PROCESS CARTRIDGE USING THE SAME 失效
公开(公告)号：JP2002149006A
公开(公告)日：2002-05-22
申请号：JP2000346449
申请日：2000-11-14
申请人： RICOH KK
发明人： TORIO NOBORU , MIYAZAKI KUNIHIKO
IPC分类号： G03G21/00 , G03G5/10
摘要： PROBLEM TO BE SOLVED: To provide an electrophotographic sensitive body having an effect to prevent produced noise and further to provide a process cartridge and an electrophotographic device using such an electrophotographic sensitive body, realizing high speed operation and high image quality and attaining high stillness. SOLUTION: In this electrophotographic sensitive body, a photoreceptive layer is provided on a conductive cylindrical base substance drum and vibration restraining material 2 is inserted into a cylindrical base substance 1. Assuming that the surface area of the inner surface of the cylindrical base substance is A and the surface area of the outer periphery of the material 2 inserted in the cylindrical base substance is B, B/A is >=0.5, and >=80% of the surface area of the outer periphery of the material 2 directly comes into contact with the inner surface of the cylindrical base substance in the electrophotographic sensitive body. It is desirable to set the specific gravity of the vibration restraining material to >=1 g/cm3 and the thickness thereof to >=2 mm. Then, the electrophotographic device and the process cartridge using such an electrophotographic sensitive body are provided.

3. 发明专利

JP2001092163A MANUFACTURING METHOD FOR ELECTROPHOTOGRAPHIC PHOTORECEPTOR AND ELECTROPHOTOGRAPHIC PHOTORECEPTOR 失效
公开(公告)号：JP2001092163A
公开(公告)日：2001-04-06
申请号：JP27189499
申请日：1999-09-27
申请人： RICOH KK
发明人： NAKAI HIROSHI , MIYAZAKI KUNIHIKO , TORIO NOBORU
IPC分类号： G03G5/05
摘要： PROBLEM TO BE SOLVED: To provide an electrophotographic photoreceptor where any film faults are not generated on the coated film even when a coating liquid containing water is applied by keeping the homogeneity of the coating liquid even when the water is mixed in it. SOLUTION: This manufacturing method of the electrophotographic photoreceptor, which has at least a charge generating layer and a charge transferring layer on an electrically conductive substrate, comprises forming the charge generating layer by applying the coating liquid containing hydrophilic silicone oil.

4. 发明专利

JP2002116661A ELECTROPHOTOGRAPHIC PHOTOSENSITIVE BODY, IMAGE FORMING METHOD UTILIZING IT, IMAGE FORMING DEVICE AND PROCESS CARTRIDGE FOR IMAGE FORMING DEVICE 失效
公开(公告)号：JP2002116661A
公开(公告)日：2002-04-19
申请号：JP2000305192
申请日：2000-10-04
申请人： RICOH KK
发明人： MIYAZAKI KUNIHIKO , TORIO NOBORU
IPC分类号： G03G21/00 , G03G5/10
摘要： PROBLEM TO BE SOLVED: To obtain an electrophotographic photosensitive body where a high quality image without any unevenness in the image can be obtained by decreasing oscillating noise generated in a contact electrifying method and oscillating noise of a cleaning blade. SOLUTION: In the electrophotographic photosensitive body provided with a photosensitive layer on a conductive cylindrical state supporting body with an outside diameter that is

5. 发明专利

JPH11295910A ELECTROPHOTOGRAPHIC PHOTORECEPTOR 失效
公开(公告)号：JPH11295910A
公开(公告)日：1999-10-29
申请号：JP12006998
申请日：1998-04-14
申请人： RICOH KK
发明人： NAKAI HIROSHI , MIYAZAKI KUNIHIKO
IPC分类号： G03G5/05 , G03G5/06
摘要： PROBLEM TO BE SOLVED: To provide an electrophotographic photoreceptor having enough adhesion property which can maintain a stable potential in a copying machine even when the photoreceptor is repeatedly used for a long time. SOLUTION: This electrophotographic photoreceptor has at least a charge producing layer and a charge transfer layer successively formed on a conductive base body. The charge producing material in the charge producing layer consists of one or more kinds of trisazo pigments and/or bisazo compds. The charge transfer layer contains phthalocyanine pigments (preferably titanylphthalocyanine compds. or nonmetal phthalocyanine compds.).

6. 发明专利

JPH05158248A ELECTROPHOTOGRAPHIC SENSITIVE BODY 失效
公开(公告)号：JPH05158248A
公开(公告)日：1993-06-25
申请号：JP34997791
申请日：1991-12-10
申请人： RICOH KK
发明人： KAWASAKI YOSHIAKI , FUKAGAI TOSHIO , TANIGUCHI KIYOSHI , KISHI HIROYUKI , MISHIMA NAOSHI , INOUE TOMOHIRO , AOKI KAORU , MIYAZAKI KUNIHIKO
IPC分类号： G03G5/047 , G03G5/05 , G03G5/06
摘要： PURPOSE:To obtain an electrophotographic sensitive body excellent in wear resistance while maintaining the high sensitivity and high-speed responsiveness by forming the charge-transfer layer with a charge-transfer material and a polycarbonate having a specified viscosity average mol.wt. and specifying the weight ratio of both materials. CONSTITUTION:At least a charge generating layer and a charge-transfer layer are successively laminated on a conductive substrate to form the photosensitive body. The charge-transfer layer is formed with a charge-transfer material CTM and a polycarbonate R having 30,000 to 50,000 viscosity average mol.wt., and the weight ratio of the CTM to R is controlled to >=5 to 10 and =5 to 10 and

7. 发明专利

JP2001022103A ELECTROPHOTOGRAPHIC PHOTORECEPTOR AND ITS PRODUCTION 失效
公开(公告)号：JP2001022103A
公开(公告)日：2001-01-26
申请号：JP19341899
申请日：1999-07-07
申请人： RICOH KK
发明人： NAKAI HIROSHI , MIYAZAKI KUNIHIKO
IPC分类号： G03G5/05
摘要： PROBLEM TO BE SOLVED: To prevent the occurrence of unevenness in tint by thoroughly pulling up a drum from a coating fluid for an electric charge generating layer and keeping the drum stationary for specified seconds when the electric charge generating layer is formed by dip coating. SOLUTION: A drum 2 is held by an elevator 1 and soaked in a coating fluid 4 for an electric charge generating layer filled into a coating tank 3. The entire drum 2 is soaked and the drum 2 is pulled up at a prescribed rate to stick the coating fluid on the drum 2. After the drum 2 is thoroughly pulled up from the coating fluid 4, it is kept stationary for >=T/2 sec, preferably T/2 to T sec (T is the boiling point of a solvent contained in the coating fluid 4) to form the electric charge generating layer of the objective electrophotographic photoreceptor. The drum as an electrically conductive substrate may be a film of a metal such as Al, Ni, Fe, Cu or Au or an alloy. The solvent may be tetrahydrofuran having 65 deg.C boiling point, dichloroethane having 84 deg.C boiling point and cyclohexane having 81 deg.C boiling point.

8. 发明专利

JP2003186347A PHOTORECEPTOR, PROCESS CARTRIDGE, IMAGE FORMING APPARATUS AND COPYING MACHINE 审中-公开
公开(公告)号：JP2003186347A
公开(公告)日：2003-07-04
申请号：JP2001382382
申请日：2001-12-14
申请人： RICOH KK
发明人： MIYAZAKI KUNIHIKO , ISHIURA SUKEAKI
IPC分类号： G03G21/00
摘要： PROBLEM TO BE SOLVED: To suppress occurrence of abnormal sound caused by vibration without producing charge irregularity. SOLUTION: A taper part 26b is formed on an end of an axial center direction of a vibration suppression member 26 positioned so as to contact the outer peripheral face of a cylindrical body part 26a formed by an elastic material on the inner peripheral face of a cylindrical support 24 having electric conductivity by forming a photosensitive layer 25 on the outer peripheral face. Then, relation of the outer peripheral surface area A of the vibration suppression member 26 and the outer peripheral surface area B of the taper part 26b is set so as to be in a range of B/A≤0.3. COPYRIGHT: (C)2003,JPO

9. 发明专利

JP2000314976A ELECTROPHOTOGRAPHIC PHOTORECEPTOR AND ELECTROPHOTOGRAPHIC DEVICE USING SAME 失效
公开(公告)号：JP2000314976A
公开(公告)日：2000-11-14
申请号：JP12561699
申请日：1999-05-06
申请人： RICOH KK
发明人： NAKAI HIROSHI , MIYAZAKI KUNIHIKO
IPC分类号： G03G15/02 , G03G5/047 , G03G5/05 , G03G5/06 , G03G5/14
摘要： PROBLEM TO BE SOLVED: To provide the electrophotographic photoreceptor and the electrophotographic device superior in potential stability even in the case of uses for a long period without impairing high image quality. SOLUTION: The electrophotographic photoreceptor is obtained by successively laminating a >=4 μm thick undercoat layer and a

10. 发明专利

JP2000305292A END COATING FILM REMOVING DEVICE FOR ELECTROPHOTOGRAPHIC PHOTORECEPTOR 失效
公开(公告)号：JP2000305292A
公开(公告)日：2000-11-02
申请号：JP11742199
申请日：1999-04-26
申请人： RICOH KK
发明人： MIYAZAKI KUNIHIKO , NAKAI HIROSHI , YAMAGUCHI YOSHIHIRO
IPC分类号： G03G5/05
摘要： PROBLEM TO BE SOLVED: To make it possible to almost completely remove a coating film at a bottom end and to efficiently remove the coating film with always stable operation and good accuracy. SOLUTION: This device includes an inside surface coating film removing member 14 into which a solvent for dissolving the coating film on the inside surface at the bottom end of a cylindrical substrate 11 is incorporated, an outside surface coating film removing member 16 into which a solvent for dissolving the coating film on the outside surface at the bottom end of the cylindrical substrate 11 is incorporated and a moving means 17 which moves the inside surface coating film removing member 14 and the outside surface coating film removing member 16 in the axial direction of the cylindrical substrate 11 to the position of the coating film of the cylindrical substrate 11 to be removed of the inside surface coating film removing member 14 and the outside surface coating film removing member 16, moves both members in a direction perpendicular to the axial direction in order to execute the contact and detachment with and from the surface of the cylindrical substrate 11 and further rotates these members.

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