Patents by Inventor Heiichiro Matsuda

Heiichiro Matsuda 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).

  • False-twist textured yarn of polyamide and method and apparatus for producing the same
    Patent number: 4773206
    Abstract: A false-twist textured yarn composed of a polyamide filament yarn excellent in stretchability and heat durability suitable for sports wear is proposed, which is characterized in that the maximum value F (g) of a shrinkage force under dry heat and a heat treatment temperature T (.degree.C.), at which the maximum value F is attained, are defined by the following equations:0.20D.gtoreq.F.gtoreq.0.08D, andTm>T.gtoreq.Tm-25wherein D is a titre of the textured yarn represented by denier, and Tm is a melt-breakage temperature of the polyamide filament yarn represented by .degree.C., and that the crimp recovery CR is 15% or more. The textured yarn is preferably produced from a preoriented undrawn polyamide filament under a specific false-twist texturing conditions by means of an in-draw texturing machine with a specific yarn guide for facilitating a threading operation.
    Type: Grant
    Filed: January 13, 1987
    Date of Patent: September 27, 1988
    Assignee: Toray Industries, Inc.
    Inventors: Teiryo Kojima, Heiichiro Matsuda, Masaru Tokizane
  • False-twist textured yarn of polyamide
    Patent number: 4682465
    Abstract: A false-twist textured yarn composed of a polyamide filament yarn excellent in stretchability and heat durability suitable for sports wear is proposed, which is characterized in that the maximum value F (g) of a shrinkage force under dry heat and a heat treatment temperature T (.degree.C.), at which the maximum shrinkage force value F is attained, are defined by the following equations:0.20 g/D.gtoreq.F/D.gtoreq.0.08 g/D andTm.gtoreq.T.gtoreq.Tm-25wherein D is the titre of the textured yarn represented by denier, and Tm is the melt-breakage temperature of the polyamide filament yarn represented by .degree.C., and that the crimp recovery CR of the yarn is 15% or more. The textured yarn is preferably produced from a preoriented undrawn polyamide filament under specific false-twist texturing conditions by means of an in-draw texturing machine with the specific yarn guide for facilitating a threading operation.
    Type: Grant
    Filed: December 7, 1984
    Date of Patent: July 28, 1987
    Assignee: Toray Industries, Inc.
    Inventors: Teiryo Kojima, Heiichiro Matsuda, Masaru Tokizane