Patents by Inventor Yukio A. Matsunaga

Yukio A. Matsunaga 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 producing polypropylene sheet
    Patent number: 4495124
    Abstract: A method and apparatus is provided for forming an abrasion resistant sheet from a sheet of orientable thermoplastic polymer material in one continuous process which can be effected by a single continuous production line apparatus. A method and apparatus is also provided for treating the surface of an oriented sheet with heated rolls for creating a fused surface layer on each side of the sheet. A method and apparatus is also provided for slitting a wider sheet into a plurality of strips at elevated temperatures with the strap under tension and with a staggered array of fixed blades. Further, a method and apparatus is provided for treating an oriented strip having a non-uniform thickness so as to conform the surfaces of the strip in a substantially uniformly flat and parallel configuration.
    Type: Grant
    Filed: October 24, 1983
    Date of Patent: January 22, 1985
    Assignee: Signode Corporation
    Inventors: Donald L. Van Erden, Russell J. Gould, Yukio A. Matsunaga
  • Apparatus for producing polypropylene sheet
    Patent number: 4428720
    Abstract: Apparatus is provied for forming an abrasion resistant sheet from a sheet of orientable thermoplastic polymer material in one continuous production line apparatus. Apparatus is also provided for treating the surface of an oriented sheet with heated rolls for creating a fused surface layer on each side of the sheet.
    Type: Grant
    Filed: January 28, 1982
    Date of Patent: January 31, 1984
    Assignee: Signode Corporation
    Inventors: Donald L. Van Erden, Russell J. Gould, Yukio A. Matsunaga