Patents by Inventor Minoru Murase

Minoru Murase 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).

  • Developing unit for electro-photographic apparatus
    Patent number: 5579091
    Abstract: When a developing agent prepared to have a preset toner density is loaded in a developing unit, a comparing reference level for controlling the toner density in the developing agent is changed to a value higher than the preset value in the initial stage of operation and fresh toner is supplied to the developing agent so that the toner density of the developing agent is increased in comparison to the reference level. Thereby, the developed density is prevented from decreasing due to an excess amount of friction charge of the toner.
    Type: Grant
    Filed: March 2, 1995
    Date of Patent: November 26, 1996
    Assignee: Hitachi Koki Co., Ltd.
    Inventors: Koutarou Yamada, Youji Hirose, Hiroshi Ueno, Isao Watanabe, Yoshio Ogura, Katuhiro Shinohara, Kouhei Katayama, Minoru Murase