Patents by Inventor Kazuo Sugawa

Kazuo Sugawa 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).

  • Apparatus for conveying copy sheet for electrophotographic copying machine
    Patent number: 4377229
    Abstract: A conveying apparatus includes a plurality of pairs of conveying rollers which are disposed for abutment against each other for transporting a copy sheet carrying an unfixed toner image thereon toward a fixing unit. A cleaning member is disposed for abutment against those rollers which are adapted to contact the toner image to clean them and to charge them triboelectrically to the same polarity as the toner.
    Type: Grant
    Filed: September 8, 1980
    Date of Patent: March 22, 1983
    Assignee: Olympus Optical Company Ltd.
    Inventors: Kiyoshi Miyashita, Tatuo Takizawa, Kazuo Sugawa, Masaji Nishikawa
  • Electrophotographic copying machine
    Patent number: 4357095
    Abstract: A copying machine includes a shutter mechanism comprising a light shield member which intercepts the incidence of extraneous light onto a photosensitive drum through an exposure window, and a detecting member which is operated by a cover which forms a conveyor unit for a sheet-shaped original or by a book carrier on which a thick original is placed. A movement of the light shield member into or out of an exposure light path is controlled by the operation of the detecting member.
    Type: Grant
    Filed: January 26, 1981
    Date of Patent: November 2, 1982
    Assignee: Olympus Optical Company Ltd.
    Inventors: Kazuo Sugawa, Norio Amemiya