Patents by Inventor Kinu Hiruma

Kinu Hiruma 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).

  • Photoconductive plate for printing and a method for the preparation of a printing plate by heating
    Patent number: 4357403
    Abstract: A photoconductive plate for printing use having imaged and non-imaged portions. The plate comprises an electroconductive support and a photoconductive layer including a photoconductive material comprising an organic photoconductive pigment and a binder comprising an alkaline soluble phenol resin. The photoconductive plate is subjected to heat treatment at a sufficiently elevated temperature prior to removal of portions of the photoconductive layer so that at least 80% by volume of the non-imaged portion of the photoconductive layer is removed when the photoconductive plate is subjected to treatment with a removing solution. A method for preparing a printing plate. An image is formed on a photoconductive layer and the non-imaged portion of the photoconductive layer is removed by treating the layer with a removing solution.
    Type: Grant
    Filed: August 7, 1980
    Date of Patent: November 2, 1982
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Fumio Shimada, Kinu Hiruma