Patents Examined by Edward E. Whitby
  • Patent number: 4009957
    Abstract: As a scanning element of an electrophotographic copying machine begins to move, a feed roller moves a sheet of copy paper into the bite of register rollers which are held stationary. This movement of the copy paper is accomplished in a period of time which is less than that required for the scanning element to reach a predetermined scan synchronizing point. The feed roller is then stopped so that the copy paper is slightly buckled and thereby resiliently urged into the bite of the register rollers. When the scanning element reaches the scan synchronizing point, a sensor causes the register rollers to rotate thereby feeding the copy sheet through the machine in synchronization with the movement of the scanning element. The copy machine may employ a seamless photoconductive drum or belt moving at constant speed in which case an electrostatic image is formed on the drum or belt by the scanning element. The image is developed by toner particles and transferred to the copy sheet.
    Type: Grant
    Filed: November 7, 1974
    Date of Patent: March 1, 1977
    Assignee: Ricoh Co., Ltd.
    Inventors: Shigeru Suzuki, Minoru Iwamoto, Koichi Noguchi, Kyoji Omi, Tatsuo Nishikawa