Patents by Inventor Yasuharu Utsunomiya

Yasuharu Utsunomiya 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 cleaning apparatus in electrophotography
    Patent number: 4619523
    Abstract: A toner cleaning apparatus for removing a toner left on the surface of an electrophotographic photosensitive material by a doctor blade in the electrophotographic process includes an elastic doctor blade having a toner-scraping top end, a holder for supporting the base of the doctor blade, a fulcrum for swingably supporting the holder and a pressing mechanism for pressing the top end of the doctor blade to the surface of the photosensitive material, wherein the fulcrum and doctor blade are arranged so that on the feed-out side of the photosensitive material, the contact angle .alpha. between the top end of the doctor blade and the photosensitive material is smaller than the angle .beta.
    Type: Grant
    Filed: July 25, 1984
    Date of Patent: October 28, 1986
    Assignee: Mita Industrial Co., Ltd.
    Inventors: Masahiko Maeda, Toru Nakazawa, Yasuharu Utsunomiya, Ryuji Wataki
  • Photosensitive composition for electrophotography having polyvinyl carbazole and silicone oil
    Patent number: 4574114
    Abstract: A photosensitive composition for electrophotography comprising polyvinyl carbazole, a charge-generating organic pigment, and as a sensitizing agent a silicone oil, thereby enhancing the sensitivity of the resulting photosensitive layer and improving the aging characteristic thereof.
    Type: Grant
    Filed: November 16, 1983
    Date of Patent: March 4, 1986
    Assignee: Mita Industrial Company, Ltd.
    Inventors: Masahiro Tsutsumi, Toru Nakazawa, Yasuharu Utsunomiya