Patents by Inventor Ryuzo Tamaki

Ryuzo Tamaki 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).

  • Calibration method for printing plate picture pattern area meter
    Patent number: 4441819
    Abstract: A calibration method is disclosed for a device in which an offset printing plate is optically scanned to measure the picture pattern area of the printing plate from the quantity of light reflected therefrom in which average values are obtained by scanning the printing plate plural times. The maximum and minimum of the average values are selected respectively as the quantity of light reflected from the non-printing-image region of the printing plate and as the quantity of light reflected from the printing image region of the printing plate in order to perform the calibration.
    Type: Grant
    Filed: October 15, 1981
    Date of Patent: April 10, 1984
    Assignee: Dai Nippon Insatsu Kabushiki Kaisha
    Inventors: Hideo Takeuchi, Satoru Horiguchi, Ryuzo Tamaki