Patents by Inventor Kokichi Homma, deceased

Kokichi Homma, deceased 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).

  • Patent number: 4187107
    Abstract: A plate making method for gravure printing which method is easy to carry out and excellent in the tone reproducibility of highlight portion. The method of the invention comprises the steps of: A. exposing a photosensitive material to light source through a gravure screen having desired number of transparent lines; B. exposing the photosensitive material to light through a tint screen and continuous tone positive; C. further exposing the photosensitive material to light through only the continuous tone positive; and D. treating the exposed photosensitive material with succeeding plate making steps such as transferring, developing and etching, in which the order of the above exposing steps A, B and C is not fixed.
    Type: Grant
    Filed: August 23, 1978
    Date of Patent: February 5, 1980
    Assignee: Toppan Printing Co., Ltd.
    Inventors: Kokichi Homma, deceased, Yoshio Kameyama