Patents by Inventor Katsuhide Sano

Katsuhide Sano 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 having a developing and cleaning function using a controlled potential difference between surface and developing bias
    Patent number: 5075729
    Abstract: An image-forming apparatus that has a photosensitive drum. The drum is charged by a main charger to a surface potential Vo. A light beam bearing image information is applied after the transfer of the developed image and before the next image forming operation to facilitate cleaning thereof.
    Type: Grant
    Filed: October 13, 1988
    Date of Patent: December 24, 1991
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Masao Hayashi, Kenichi Tsuneeda, Katsuhide Sano
  • Resin-coated carrier for use in two-component electrophotographic developers
    Patent number: 4629673
    Abstract: A carrier for use as a component in electrophotographic two-component developers having improved mechanical strength, durability and triboelectric charge characteristics comprising porous magnetite particles coated with a cross linked polymeric film comprising an epoxy resin and a polyamide resin. A two-component electrophotographic developer comprising resin coated porous magnetite carrier particles and toner particles and a method of producing resin coated porous magnetite carrier particles are also disclosed.
    Type: Grant
    Filed: June 4, 1985
    Date of Patent: December 16, 1986
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Shigenobu Osawa, Tamotsu Murakami, Takashi Mizuma, Katsuhide Sano