Patents by Inventor Masumi Satou

Masumi Satou 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).

  • Method and apparatus for image forming capable of effectively generating a consistent charge potential
    Patent number: 6360065
    Abstract: A charging apparatus includes a charging member arranged to be adjacent to a photoconductive member with a gap having a tolerance in a charging region relative to the photoconductive member and applied with a voltage including a direct current voltage under a constant voltage control including an alternating current element to apply a charge to the photoconductive member. The alternating current element has a peak-to-peak voltage at least twice as great as a charge-start voltage to be applied to the charging member at a maximum gap within a range of the gap having the tolerance.
    Type: Grant
    Filed: August 2, 2000
    Date of Patent: March 19, 2002
    Assignee: Ricoh Co., Ltd.
    Inventors: Hitoshi Ishibashi, Masumi Satou, Megumi Ohtoshi