Patents by Inventor Kazunori Kitagaki

Kazunori Kitagaki 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).

  • Method and apparatus for color electrophotography
    Patent number: 4949125
    Abstract: A charging process, an exposure process, and a development process are performed to form a toner image on a photosensitive member for each of a plurality of different colors. The toner images for the respective colors form a composite color image. The composite color image is transferred to a sheet. A potential of toner on the photosensitive member is varied before the development process for a final color is performed. The colors may be yellow, magenta, and cyan respectively.
    Type: Grant
    Filed: October 21, 1988
    Date of Patent: August 14, 1990
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Hajime Yamamoto, Kazunori Kitagaki, Masahiko Nakamura
  • Method and apparatus for color electrophotography
    Patent number: 4927724
    Abstract: A charging process, an exposure process, and a development process are performed to form a toner image on a photosensitive member for each of a plurality of different colors. The toner images for the respective colors form a composite color image. Second color toner image forming processes are effected subsequently to first color toner image forming processes. The first color charging process charges the photosensitive member to a first potential. The second color charging process charges the photosensitive member to a second potential. The second potential is set equal to or lower than the first potential. The composite color image is transferred to a sheet.
    Type: Grant
    Filed: November 8, 1988
    Date of Patent: May 22, 1990
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Hajime Yamamoto, Yuji Takashima, Kazunori Kitagaki, Masahiko Nakamura