Patents by Inventor Nobuyuki Hanami

Nobuyuki Hanami 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).

  • Electrophotographic photosensitive material
    Patent number: 6040099
    Abstract: An electrophotographic photosensitive member according to the present invention includes: a photosensitive layer formed on an electroconductive support member thereof, wherein a surface layer of the photosensitive member contains a silicon denatured polycarbonate copolymer and a silicon-type graft polymer. An electrophotographic photosensitive apparatus according to the present invention includes: an electrophotographic photosensitive member, the surface layer of which contains a silicon denatured polycarbonate copolymer and a silicon-type graft polymer; a latent image forming unit for forming an electrostatic latent image on the electrophotographic photosensitive member; a developing unit for forming a toner image by developing the electrophotographic photosensitive member, on which the electrostatic image has been formed, with a toner; and, optimally, a cleaning unit for cleaning the electrophotographic photosensitive member.
    Type: Grant
    Filed: January 11, 1996
    Date of Patent: March 21, 2000
    Assignee: Canon Kabushiki Kaisha
    Inventors: Nobuyuki Hanami, Junichi Kishi, Yoichi Kawamorita, Takao Soma
  • Electrophotographic photosensitive member, and electrophotographic apparatus, device unit, and facsimile machine employing the same
    Patent number: 5558964
    Abstract: An to an electrophotographic photosensitive member includes a photosensitive layer containing a specified oxytitanium phthalocyanine and a polyvinyl acetal resin having a structural unit represented by Formula: ##STR1## wherein X is a hydrogen atom, a fluorine atom, a chlorine atom, a bromine atom, a nitro group, or a cyano group; and Y is a fluorine atom, a chlorine atom, a bromine atom, a nitro group, or a cyano group. The photosensitive member maintains a low residual potential without deterioration of the sensitivity during repeated use.
    Type: Grant
    Filed: December 12, 1994
    Date of Patent: September 24, 1996
    Assignee: Canon Kabushiki Kaisha
    Inventors: Toshiyuki Yoshihara, Nobuyuki Hanami, Hideyuki Takai, Hideki Anayama, Hajime Miyazaki, Junichi Kishi, Itaru Yamazaki, Harumi Sakoh, Tetsuro Kanemaru, Kazushi Iuchi, Hideyuki Ainoya
  • Electrophotographic photosensitive member, and electrophotographic apparatus and device unit employing the same
    Patent number: 5418099
    Abstract: The present invention relates to an electrophotographic photosensitive member comprising an electroconductive support and a photosensitive layer formed thereon: the surface layer of the electrophotographic photosensitive member containing a first copolymer of a first construction unit represented by Formula (1) and a second construction unit represented by Formula (2), and a second copolymer of a third construction unit represented by Formula (3) and a fourth construction unit represented by Formula (4): ##STR1##
    Type: Grant
    Filed: May 18, 1993
    Date of Patent: May 23, 1995
    Assignee: Canon Kabushiki Kaisha
    Inventors: Shinya Mayama, Naoto Fujimura, Toshiyuki Yoshihara, Nobuyuki Hanami, Kiyoshi Sakai, Hideki Anayama, Junichi Kishi, Hideyuki Ainoya, Katsumi Aoki
  • Electrophotographic photosensitive member and apparatus including same
    Patent number: 5362588
    Abstract: An electrophotographic photosensitive member is formed by a cylindrical substrate and a photosensitive layer disposed on the cylindrical substrate. The cylindrical substrate has a circumferential end section adjacent to at least one longitudinal end of the cylindrical substrate, and the circumferential end section has the photosensitive layer thereon removed and has been subjected to cutting. The electrophotographic photosensitive member is characterized by the circumferential end section having a smooth surface on the cylindrical substrate. The photosensitive member co-operates with a peripheral member, such as a spacer or a sealing member, at the end section in performing a stable electrophotographic process.
    Type: Grant
    Filed: July 28, 1992
    Date of Patent: November 8, 1994
    Assignee: Canon Kabushiki Kaisha
    Inventors: Toshiyuki Yoshihara, Nobuyuki Hanami, Hideki Anayama, Junichi Kishi, Hideyuki Ainoya