Patents Assigned to Oki Data System Co., Ltd.
  • Patent number: 5790920
    Abstract: A toner image processing apparatus performs a printing operation and a cleaning operation. A toner-attracting electrode includes first and second electrodes disposed closer to the charged surface of a photosensitive drum and outside of a path through which the light from the exposing device illuminates the charged surface. During the toner attracting operation, a toner-recovering device causes the toner-attracting electrode to attract the toner particles floating in the air surrounding the exposing device, and reversely charged toner particles and residual toner particles left on the photosensitive drum after the toner image is transferred to the print medium. During the toner-releasing operation, the toner-recovering device causes the toner-attracting electrode to release the attracted toner particles to the photosensitive drum. The toner-attracting operation is performed during the printing operation and the toner-releasing operation is performed during the cleaning operation.
    Type: Grant
    Filed: July 14, 1997
    Date of Patent: August 4, 1998
    Assignees: Oki Data System Co., Ltd., Oki Data Corp.
    Inventors: Osamu Teramura, Hiroyuki Yajima