Patents by Inventor Yoshitaka Houseki

Yoshitaka Houseki 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).

  • Film for thermal stencil sheets having specific thermal stresses and shrinkage
    Patent number: 5360665
    Abstract: A novel film material for thermal stencil sheets is disclosed. The film comprises a biaxially stretched polyester film which contains 0.1-5.0% of fine particles having an average diameter of 0.05-2.0 .mu.m and has a melting point of 170.degree.-230.degree. C. and a thickness of 0.5-2.5 .mu.m and the maximum value of an average longitudinal and transversal thermal construction stress of the film at a temperature of 100.degree.-160.degree. C. is 500-1500 g/mm.sup.2. The film for heat-sensitive mimeographic printing stencil sheets of the present invention is excellent in handling property sensitivity to thermal perforation, resolution in printing, tone property and curling resistance and thus the invention is industrially very significant.
    Type: Grant
    Filed: August 20, 1992
    Date of Patent: November 1, 1994
    Assignee: Diafoil Hoechst Company, Ltd.
    Inventors: Yoshinori Sato, Yoshitugu Funada, Yoshitaka Houseki, Koji Nagura