Patents by Inventor Yokoyama Yoshihiro

Yokoyama Yoshihiro 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).

  • Electrophotographic copier
    Patent number: 4647177
    Abstract: An electrophotographic copier comprises a photosensitive belt supported on first and second rollers and driven thereby, a development unit, a single transfer corotron, and an exposure unit. The development unit is disposed adjacent to the first roller, and the single transfer corotron is positioned on one side of a line connecting the first and second rollers, while the exposure unit is positioned on the other side of the line. The corotron charges the photosensitive belt during a first rotation of the belt around the rollers and causes transfer of a developed image from the photosensitive surface of the belt during a second rotation of the belt around the rollers.
    Type: Grant
    Filed: September 6, 1984
    Date of Patent: March 3, 1987
    Assignee: Matsushita Electric Industry Co, Ltd.
    Inventors: Urata Yoshihito, Sasaki Toshiharu, Yokoyama Yoshihiro, Sekine Yoichi