Patents by Inventor Toshi Saitoh

Toshi Saitoh 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).

  • Toner sealing arrangement for a dry developing device of an electrostatic copier
    Patent number: 5073797
    Abstract: The developing device provided in accordance with the invention includes a developer layer thickness controlling member for controlling the thickness of the developer through the developer carrier. The layer thickness controlling member is brought into press contact with the developer carrier downstream in the moving direction of the developer carrier. A first sealing member (48,49) is provided for cutting off the developer moving to both ends of the developer carrier. A second sealing member (50,51) is provided for shielding the junction of the developer carrier, the first sealing member, and the layer thickness controlling member. Finally, a sheet-shaped elastic body is provided for cutting off the developer which moves to the ends of the developer carrier.
    Type: Grant
    Filed: January 24, 1989
    Date of Patent: December 17, 1991
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Taizo Ono, Hirotsugu Sakamoto, Yoshihiro Katayama, Toshi Saitoh
  • Developing device
    Patent number: 4947211
    Abstract: A developing device comprises a developer carrying means for carrying developer from a developer supplying means to an electrophotographic light-sensitive member having electrostatic latent image and a developer returning means for returning superfluous developer to the developer supplying means, thereby over-electrification of the developer is prevented.
    Type: Grant
    Filed: July 7, 1989
    Date of Patent: August 7, 1990
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Taizo Ono, Yoshihiro Katayama, Toshi Saitoh