Patents by Inventor Isao Chonan

Isao Chonan 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).

  • Ink washing device for a printing machine
    Patent number: 5325780
    Abstract: An ink washing device is disclosed, for use in a printing machine having a deposit roller with a variable luminance outer surface. The washing device includes a blade disposed adjacent to the deposit roller, for removing excess deposit of ink on the outer surface of the deposit roller, thus causing its luminance to vary. A luminance sensor detects changes in the luminance of the outer surface. The washing operation is interrupted or continued based on the detected luminance changes.
    Type: Grant
    Filed: March 9, 1993
    Date of Patent: July 5, 1994
    Assignee: Sakurai Graphic Systems
    Inventors: Fumio Matsuda, Isao Chonan, Hideo Kitagawa, Katsunori Furuta
  • Ink washing device for a printing machine
    Patent number: RE35444
    Abstract: An ink washing device is disclosed, for use in a printing machine having a deposit roller with a variable luminance outer surface. The washing device includes a blade disposed adjacent to the deposit roller, for removing excess deposit of ink on the outer surface of the deposit roller, thus causing its luminance to vary. A luminance sensor detects changes in the luminance of the outer surface. The washing operation is interrupted or continued based on the detected luminance changes.
    Type: Grant
    Filed: November 6, 1995
    Date of Patent: February 11, 1997
    Assignee: Sakurai Graphic Systems Corporation
    Inventors: Fumio Matsuda, Isao Chonan, Hideo Kitagawa, Katsunori Furuta