Patents by Inventor Katuaki Sumida

Katuaki Sumida 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).

  • Image forming apparatus with flying toner detecting device
    Patent number: 5923922
    Abstract: An image forming apparatus has a developer container, a development device for developing a latent image formed on a surface of a photoreceptor drum by supplying toner to the latent image, and an agitation roller for supplying toner to the development device and agitating the toner in the developer container. The development device and the agitation roller are installed in the developer container. Moreover, the image forming apparatus includes a flying toner detecting device for detecting an amount of toner flying from the development device, and a control unit for controlling various developer operations such as the toner related agitating operation of the agitation roller, toner supply amount, etc. in response to a result of a detection performed by the flying toner detecting device. This structure prevents the toner from flying from the development device.
    Type: Grant
    Filed: May 31, 1996
    Date of Patent: July 13, 1999
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Toshihisa Ishida, Katuaki Sumida, Kanshiro Okamoto, Jitsuo Masuda, Masato Asanuma, Katsushi Inoue, Toshiaki Ino, Hideji Saiko, Yasuo Kitabatake