Patents Examined by A. T. Grimely
  • Image forming equipment having improved toner sensing
    Patent number: 5270783
    Abstract: Image forming equipment having an image carrier and a developer carrier located face-to-face and forming an AC-superposed DC electric field between them to develop a latent image electrostatically formed on the image carrier. Sensors responsive to image forming conditions are provided and protected from noise ascribable to an AC component included in the electric field in the event when the sensors operate.
    Type: Grant
    Filed: July 31, 1992
    Date of Patent: December 14, 1993
    Assignee: Ricoh Company, Ltd.
    Inventors: Takashi Bisaiji, Kouji Hayashi, Noboru Sawayama, Takeyoshi Sekine, Takayuki Maruta, Norimitu Kikuchi, Tetsuro Miura, Kazunori Bannai, Kazunari Yamada, Nobuhiro Nakayama, Nobuyuki Koinuma