Patents by Inventor Tohru Kawatsura

Tohru Kawatsura 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).

  • Method for bending glass plates for a laminated glass
    Patent number: 4828598
    Abstract: A method for bending a glass plate for a laminated glass comprises a step of heating at least two glass plates separately at a temperature suitable to conduct bending operation and bending them; a step of gradually cooling each of them; a step of transferring the at least two glass plates onto a bending ring mold in an overlapping state; and a step of heat-shaping the overlapping glass plates on the bending ring mold so that the surfaces of the glass plates are fitted to and are in coincidence with each other.
    Type: Grant
    Filed: January 29, 1988
    Date of Patent: May 9, 1989
    Assignee: Asahi Glass Company Ltd.
    Inventors: Takaharu Imamura, Hiroshi Tsuji, Chikao Aruga, Tohru Kawatsura