Patents by Inventor Tatsu Saneharu

Tatsu Saneharu 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).

  • Process for producing an embossed thermoplastic resin sheet having a colored layer
    Patent number: 4671913
    Abstract: A process for continuously producing an embossed thermoplastic resin sheet having a colored layer which comprises associating a molten thermoplastic resin A and a molten thermoplastic resin B having a different color from the resin A within a die for extrusion molding, extruding the associated mass through an extrusion opening to form a two-layered thermoplastic resin sheet, and thereafter embossing the sheet, wherein the temperature T (.degree.C.) of the thermoplastic resin sheet immediately before the embossing and the surface roughness R (micrometers) of said sheet immediately before the embossing expressed by a 10-point average roughness in accordance with ISO-R468 are selected so as to satisfy the following relation 1.2R+T.ltoreq.145 (1).
    Type: Grant
    Filed: August 30, 1985
    Date of Patent: June 9, 1987
    Assignee: Sekisui Kagaku Kogyo Kabushiki Kaisha
    Inventors: Endo Gen, Tatsu Saneharu, Hirokazu Hori, Yoshihiro Kawata