Patents by Inventor Hiroichi Morikawa

Hiroichi Morikawa 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).

  • Patent number: 4232101
    Abstract: A photosensitive paper for electrophotography comprising a paper substrate, an electrophotographic photosensitive layer formed on one surface of the substrate and an electrically conductive coating layer formed on the other surface of the substrate, which electrically conductive coating layer comprises an electrically conductive binder medium and a fine powder of a fluorine resin distributed predominantly in the surface portion of the electrically conductive coating layer, is disclosed.This photosensitive paper is satisfactory in all of the following properties; adaptability to the paper feeding operation, the scratch resistance of the photosensitive layer, the blocking resistance and electric characteristics irrespective of the humidity conditions in the operation atmosphere.
    Type: Grant
    Filed: June 27, 1978
    Date of Patent: November 4, 1980
    Assignee: Mita Industrial Company Ltd.
    Inventors: Hideo Fukuda, Hiroichi Morikawa, Yasutoki Kamezawa, Tatsuo Aizawa
  • Patent number: 4123271
    Abstract: A process for preparing a photosensitive material for electrostatic photography having an improved memory resistance, which comprises a photoconductive layer on an electrically conductive substrate, the photoconductive layer comprising (1) a finely divided inorganic photoconductor, (2) 5 to 50 parts by weight, per 100 parts by weight of the photoconductor of an electrically insulating organic synthetic resin binder having a specific resistance of at least 10.sup.14 ohm-cm, and (3) 0.001 to 1 % by weight, based on the photoconductor, of at least one photo-memory erasing compound selected from alkali metal dichromates, which process comprises forming the photoconductive layer by applying a coating composition to the electrically conductive substrate at a coating weight of 5 to 50 g/m.sup.
    Type: Grant
    Filed: November 23, 1976
    Date of Patent: October 31, 1978
    Assignee: Mita Industrial Company, Limited
    Inventors: Akira Fushida, Hiroichi Morikawa, Toshihiro Shinsho, Takaaki Miyazaki, Tatsuo Aizawa