Patents Examined by Emanuel Todd Voeitz
  • Developing apparatus
    Patent number: 4710015
    Abstract: A developing apparatus is disclosed, in which a developing roller composed of an insulating layer, a dielectric layer and an electrically conductive substrate is made in contact with a photosensitive member to develope a latent image on the member. The dielectric layer is formed of a material whose resistivity-specific dielectricity characteristics satisfies a certain condition which is suitable for medial tone development or binary tone development.
    Type: Grant
    Filed: October 28, 1986
    Date of Patent: December 1, 1987
    Assignee: Ricoh Company, Ltd.
    Inventors: Fuchio Takeda, Hiroyuki Matsushiro, Kazuo Kobayashi, Toshio Kaneko