Patents by Inventor Masao Ikehara

Masao Ikehara 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).

  • Photosensitive drum unit and a ground plant used therewith
    Patent number: 6006053
    Abstract: A photosensitive drum unit for an image forming device includes a tubular member having two openings at the opposite ends thereof, two flange members pressed into the openings of the tubular member, and an electroconductive ground plate attached to one or both of the flange members. The ground plate is provided with a plurality of projections formed integrally with the ground plate. The projections engage with the tubular member in order to create an electrical connection between the photosensitive drum and the body of the image forming device.
    Type: Grant
    Filed: March 12, 1998
    Date of Patent: December 21, 1999
    Assignee: Mita Industrial Co., Ltd.
    Inventor: Masao Ikehara
  • Photosensitive drum unit and a ground plate used therewith
    Patent number: 5729792
    Abstract: A photosensitive drum unit for an image forming device includes a tubular member having two openings at the opposite ends thereof, two flange members pressed into the openings of the tubular member, and an electroconductive ground plate attached to one or both of the flange members. The ground plate is provided with a plurality of projections formed integrally with the ground plate. The projections engage with the tubular member in order to create an electrical connection between the photosensitive drum and the body of the image forming device.
    Type: Grant
    Filed: October 25, 1996
    Date of Patent: March 17, 1998
    Assignee: Mita Industrial Co., Ltd.
    Inventor: Masao Ikehara