Patents by Inventor Syunju Anzai

Syunju Anzai 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).

  • Corona charger for image forming apparatus providing uniform surface charge of a recording medium
    Patent number: 5367366
    Abstract: A charger charges a recording medium before irradiation of light to form an electrostatic latent image by irradiating light as an optical image onto a surface of the recording medium. The charger includes a discharging electrode having a plurality of projections for generating corona discharge to charge the recording medium surface, a conductive shield case having an opening face opposite to the recording medium and opposed to the discharging electrode, a holding member for holding the discharging electrode in the shield case in a state in which the discharging electrode is electrically insulated from the shield case, a conductive grid electrode electrically insulated and held between the discharging electrode and the recording medium, and a power supplying device for supplying a high voltage for discharge to the discharging electrode and setting a ratio of electric currents flowing through the grid electrode and the shield case such that these electric currents are approximately equal to each other.
    Type: Grant
    Filed: April 20, 1993
    Date of Patent: November 22, 1994
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Eiichi Kido, Yuhi Yui, Syunju Anzai, Syoichiro Yoshiura, Shinji Imagawa, Hiroaki Yoshida, Yoshikazu Kawasaki, Itaru Kawabata, Keizo Fukunaga, Toyokazu Mori, Masaru Tsuji