Patents by Inventor Takeshi Iriuchijima

Takeshi Iriuchijima 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 selectively charging toner using doctor blade
    Patent number: 6049345
    Abstract: A doctor blade is provided in contact with frictionally charged toner in a toner tank, which regulates the amount of toner held on a toner holder. A charge control unit supplies to the doctor blade a voltage for selectively charging the toner. As a result, the amount of toner held on the toner holder is regulated, and simultaneously, the toner is charged to a specific polarity with a potential of the frictional charge or more. An electrostatic latent image is formed by the selectively charged toner. The toner is moved and transferred onto a papersheet which is sequentially transported, under the influence of an electric field generated by application of a voltage to an opposite electrode disposed opposing the toner holder. An image by the toner is thus formed on the papersheet.
    Type: Grant
    Filed: December 14, 1995
    Date of Patent: April 11, 2000
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Yukihito Nishio, Shiro Narikawa, Hirokazu Fujita, Yoshinobu Okumura, Hideo Yamasa, Takeshi Iriuchijima