Patents by Inventor Kazushige Nakamura

Kazushige Nakamura has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 5667926
    Abstract: An electrophotographic apparatus comprises an electrophotographic photosensitive member, and a charging assembly, an exposure assembly, a development assembly, an image-transfer assembly, and a cleaning assembly arranged around the photosensitive member in this order, whereinthe photosensitive member has a surface layer containing fluoroplastic particles; andthe electrophotographic apparatus further comprises a polishing assembly for polishing the surface of the photosensitive member after the transfer assembly and before the cleaning assembly.
    Type: Grant
    Filed: July 6, 1995
    Date of Patent: September 16, 1997
    Assignee: Canon Kabushiki Kaisha
    Inventors: Akio Maruyama, Harumi Sako, Kazushige Nakamura, Shoji Amamiya
  • Patent number: 5485250
    Abstract: An electrophotographic apparatus is disclosed which has an electrophotographic photosensitive member and a transfer device. The photosensitive member has a conductive support and a photosensitive layer, and further has a surface layer formed of a binder resin, fluorine atom- or silicon atom-containing compound particles incompatible with the binder resin, and a fluorine atom- or silicon atom-containing compound compatible with the binder resin. In the surface layer, the proportion of fluorine atoms and silicon atoms to carbon atoms, (F+Si)/C, as measured by X-ray photoelectron spectroscopy is 0.01 to 1.0. Additionally, the transfer device is a multiple-transfer device.
    Type: Grant
    Filed: August 11, 1994
    Date of Patent: January 16, 1996
    Assignee: Canon Kabushiki Kaisha
    Inventors: Noboru Kashimura, Harumi Sakoh, Kazushige Nakamura, Shoji Amamiya, Takashige Kasuya, Haruyuki Tsuji, Masaaki Yamagami, Tatsuya Ikezue
  • Patent number: 5455135
    Abstract: An electrophotographic photosensitive member includes an electroconductive substrate, a photosensitive layer disposed on the electroconductive substrate, and a protective layer disposed on the photosensitive layer, the protective layer containing a resin formed by polymerization of compounds each having two or more ion polymerizable functional groups, and electroconductive particles.
    Type: Grant
    Filed: December 16, 1993
    Date of Patent: October 3, 1995
    Assignee: Canon Kabushiki Kaisha
    Inventors: Akio Maruyama, Kazushige Nakamura, Shoji Amamiya, Shin Nagahara, Haruyuki Tsuji, Masaaki Yamagami, Michiyo Sekiya
  • Patent number: 5393628
    Abstract: An electrophotographic photosensitive member comprises a support, a photosensitive layer, and optionally a protective layer. At least one of the photosensitive layer and the protective layer contains a pyrazine derivative represented by the general formula: ##STR1## The electrophotographic photosensitive member is not deteriorated by ozone and nitrogen oxides, and is excellent in durability.
    Type: Grant
    Filed: June 23, 1993
    Date of Patent: February 28, 1995
    Assignee: Canon Kabushiki Kaisha
    Inventors: Tatsuya Ikezue, Kazushige Nakamura
  • Patent number: 5357320
    Abstract: An electrophotographic apparatus is disclosed which has an electrophotographic photosensitive member and a transfer member. The photosensitive member has a conductive support and a photosensitive layer, and further has a surface layer formed of a binder resin, fluorine atom- or silicon atom-containing compound particles incompatible with the binder resin, and a fluorine atom- or silicon atom-containing compound compatible with the binder resin. In the surface layer, the proportion of fluorine atoms and silicon atoms to carbon atoms, (F+Si)/C, as measured by X-ray photoelectron spectroscopy is 0.01 to 1.0. Additionally, the transfer member is a multiple-transfer member.
    Type: Grant
    Filed: September 2, 1993
    Date of Patent: October 18, 1994
    Assignee: Canon Kabushiki Kaisha
    Inventors: Noboru Kashimura, Harumi Sakoh, Kazushige Nakamura, Shoji Amamiya, Takashige Kasuya, Haruyuki Tsuji, Masaaki Yamagami, Tatsuya Ikezue
  • Patent number: 5229237
    Abstract: An electrophotographic photosensitive member is produced by coating an electroconductive substrate with a compound represented by formula (1) shown below and a compound represented by formula (2) shown below respectively by spray-coating through separate spraying means to form a photosensitive layer containing the compounds represented by the formulae (1) and (2) respectively on the electroconductive substrate: ##STR1## In the above formulae (1) an (2), Ar.sub.1 and Ar.sub.2 independently denote an aromatic hydrocarbon ring which may have a substituent, a heterocyclic aromatic ring which may have a substituent, or a ring assembly formed by bonding the aromatic rings directly or through an aromatic or non-aromatic bonding group; and R.sub.1 -R.sub.5 independently denote hydrogen atom, halogen atom, alkyl group, alkoxy group, nitro group or cyano group.
    Type: Grant
    Filed: April 10, 1991
    Date of Patent: July 20, 1993
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yoichi Kawamorita, Hisao Maruyama, Kazushige Nakamura
  • Patent number: 5112656
    Abstract: A coating method is disclosed, wherein a substrate is coated with a paint discharged through an aperture in the form of not a spray but a continuous string. The coating method is suitably applied to a process for producing a photosensitive member for electrophotography, wherein a paint for providing the photosensitive member, such as the one for providing a photosensitive layer or intermediate layer, is discharged onto a rotating cylindrical substrate to be wound thereabout preferably like a thread on a spool, followed by leveling to form a coating film.
    Type: Grant
    Filed: October 11, 1988
    Date of Patent: May 12, 1992
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kazushige Nakamura, Mitsuru Honda, Hitoshi Toma, Shigemori Tanaka, Keiichi Murai, Akira Unno, Ako Takemura