Patents by Inventor Tsutomi Sato

Tsutomi Sato 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).

  • Transfer device for electrophotographic printer
    Patent number: 5101239
    Abstract: In an electrophotographic printer, a toner image formed on a photoconductive member is transferred onto a recording medium by charging the recording medium and by making the charged recording medium contact the toner image formed on the photoconductive member. A transfer charger for charging the recording medium is arranged in such a fashion that the transfer charger faces the recording medium at the upstream-side portion, with respect to the feeding direction of the recording medium, of an area where the photoconductive member and the recording medium contact. Therefore, the recording medium is charged at the upstream side of the portion with respect to the lateral center of the portion where the recording medium and the image carrying means contact.
    Type: Grant
    Filed: November 13, 1990
    Date of Patent: March 31, 1992
    Assignee: Asahi Kogaku Kogyo Kabushiki Kaisha
    Inventors: Tomoyuki Nishikawa, Masahiro Kita, Takaaki Yano, Tatsuya Yoshida, Ryoji Honda, Kiyoshi Negishi, Tsutomi Sato, Shoji Kamasako