Patents by Inventor Iichiro Yamamoto

Iichiro Yamamoto 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).

  • Elastic rotatable member and fixing apparatus
    Patent number: 5011401
    Abstract: An elastic rotatable member conveniently usable as an image fixing member has a base member, a first primer layer, an elastic layer, a second primer layer and a resin layer in the order named. The first primer layer has a thermal conductivity higher than that of the second primer layer. Using the elastic rotatable member, its sheet conveying properties, releasability, wear resistance and durability are improved. When used for an image fixing rotatable member, its image fixing properties are improved.
    Type: Grant
    Filed: May 14, 1990
    Date of Patent: April 30, 1991
    Assignee: Canon Kabushiki Kaisha
    Inventors: Masaaki Sakurai, Iichiro Yamamoto, Masahiro Goto, Tsukasa Kuge, Michio Shigenobu
  • Image processing apparatus
    Patent number: 4864419
    Abstract: There is disclosed an apparatus for obtaining image signal by tonal processing of an input signal. Pulse-width modulation of the input signal is achieved thorugh comparison with a second signal of a predetermined shaped, for example a triangular signal. In order to avoid the influence of fluctuating factors in pulse-width modulation, the apparatus also has a third signal generator, and the pulse-width modulated signal or a pattern signal generated by the third signal generator is selectively used for image formation.
    Type: Grant
    Filed: August 4, 1987
    Date of Patent: September 5, 1989
    Assignee: Canon Kabushiki Kaisha
    Inventors: Tetsuo Saito, Akihiko Takeuchi, Iichiro Yamamoto, Motoi Kato, Yukihiro Ohzeki, Takahiro Inoue, Hiroshi Sasame, Hisashi Fukushima