Patents by Inventor Ryuji Araki

Ryuji Araki 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).

  • Resin product, method of disassembling the resin product, process cartridge, method of disassembling the process cartridge, and electrophotographic image forming apparatus
    Patent number: 6223010
    Abstract: A resin product has at least two resin molded parts and a recyclable part as constituent parts. The resin product is provided with a material layer easy to cut by a laser and a material layer difficult to cut by the layer, the material layer difficult to cut by the laser being disposed so that the recyclable part may not be cut by the use of the laser, the material layer easy to cut by the laser being constructed so as to be capable of being cut by the laser.
    Type: Grant
    Filed: January 10, 2000
    Date of Patent: April 24, 2001
    Assignee: Canon Kabushiki Kaisha
    Inventor: Ryuji Araki
  • Photosensitive drum, process cartridge and image forming apparatus
    Patent number: 5825472
    Abstract: A photosensitive drum usable with an image forming apparatus includes a cylindrical member having a photosensitive material at its surface; and juxtaposed helical gear and spur gear at a longitudinal end of the cylindrical member.
    Type: Grant
    Filed: July 22, 1996
    Date of Patent: October 20, 1998
    Assignee: Canon Kabushiki Kaisha
    Inventors: Ryuji Araki, Yoshinori Sugiura, Hideshi Kawaguchi, Hiroaki Miyake, Yoshiya Nomura, Kenji Matsuda, Kouji Miura
  • Developing sleeve having a cylindrical portion and a non-cylindrical portion provided by the same member, and developing device using the sleeve
    Patent number: 5701562
    Abstract: A developing sleeve including a cylindrical portion having a circular cross-sectional shape, and a non-cylindrical portion having a non-circular cross-sectional shape integral with the cylindrical portion, is disclosed, for use in a developing device.
    Type: Grant
    Filed: April 1, 1996
    Date of Patent: December 23, 1997
    Assignee: Canon Kabushiki Kaisha
    Inventors: Ryuji Araki, Atsushi Kubota, Shinichi Sasaki, Koji Miura