Patents by Inventor Masaki Kanasugi

Masaki Kanasugi 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).

  • Contact charging member, image forming unit including the contact charging member and electrophotographic image forming apparatus including the image forming unit
    Patent number: 5999776
    Abstract: A roller-shaped contact charging member which is in contact with and electrically charges a photosensitive drum is provided on a center shaft, and includes a roller-shaped conductive foam material portion covering the shaft, and a tubular-shaped conductive resin material portion covering the foam portion. The foam portion has an electric resistance of 9.times.10.sup.5 .OMEGA. or less, the resin portion includes conductive agents and has a surface electric resistance in a range from 1.times.10.sup.5 .OMEGA./.quadrature. or more to 9.times.10.sup.7 .OMEGA./.quadrature. or less, and a hardness of the charging roller as a whole is Asker F 90.degree. or less. An image forming unit includes the charging member and the drum. An electrophotographic image forming apparatus supplies a recording paper to the unit, transfers an image from the drum to the paper, and discharges the image-transferred paper.
    Type: Grant
    Filed: April 21, 1998
    Date of Patent: December 7, 1999
    Assignees: Casio Computer Co., Ltd., Casio Electronics Manufacturing Co., Ltd.
    Inventors: Tetsuya Abe, Masaki Kanasugi, Takao Yorifuji, Noriki Ono, Moriyuki Kouroku
  • Photoconductor cartridge
    Patent number: D552163
    Type: Grant
    Filed: November 17, 2005
    Date of Patent: October 2, 2007
    Assignees: Casio Keisanki Kabushiki Kaisha, Casio Denshikougyou Kabushiki Kaisha
    Inventors: Moriyuki Kouroku, Hirokazu Toshiyuki, Masaki Kanasugi
  • Toner cartridge
    Patent number: D552164
    Type: Grant
    Filed: November 17, 2005
    Date of Patent: October 2, 2007
    Assignee: Casio Keisanki Kabushiki Kaisha
    Inventors: Moriyuki Kouroku, Hirokazu Toshiyuki, Masaki Kanasugi
  • Pouch for retrieved waste toner
    Patent number: D559893
    Type: Grant
    Filed: November 17, 2005
    Date of Patent: January 15, 2008
    Assignees: Casio Keisanki Kabushiki Kaisha, Casio Denshikougyou Kabushiki Kaisha
    Inventors: Moriyuki Kouroku, Hirokazu Toshiyuki, Masaki Kanasugi