Patents by Inventor Seiichi Yamagata

Seiichi Yamagata 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).

  • Multicolored yarn and method
    Patent number: 4383403
    Abstract: A multicolored spun yarn is provided which comprises a substantially untwisted bundle of core staple fibers and a plurality of staple fibers wrapped helically around said bundle of core staple fibers; the bundle of core staple fibers comprise a plurality of staple fibers which are different from each other in color tone or in dyeability, and the yarn having at random intervals portions wherein staple fibers of one kind cover up staple fibers of another kind, and the method of manufacturing the same.
    Type: Grant
    Filed: February 26, 1981
    Date of Patent: May 17, 1983
    Assignee: Toray Industries, Inc.
    Inventors: Takashi Nakayama, Kohji Kajita, Seiichi Yamagata
  • Method and apparatus for commencing the yarn forming operation of a fasciated yarn
    Patent number: 4114358
    Abstract: An improved method for commencing the yarn forming operation of a fasciated yarn and an apparatus for carrying it out thereof. In the apparatus for manufacturing a fasciated yarn from a bundle of fibers suppled from a supply mechanism into a yarn forming mechanism provided with a fluid nozzle, when the yarn forming operation is commenced, the distance between the downstream nip point of the fiber bundle supply mechanism and a twisting point of the fluid nozzle is shortened in a condition shorter than a predetermined distance such as an effective fiber length of a material fiber, and after completion of such initial yarn forming operation, the above-mentioned distance is gradually or stepwisely enlarged to the distance wherein a normal yarn forming operation is carried out. Such shortening and enlarging the above-mentioned distance is carried out by displacing the fluid nozzle and/or changing the position of the downstream nip point of the fiber bundle supply mechanism.
    Type: Grant
    Filed: May 6, 1977
    Date of Patent: September 19, 1978
    Assignee: Toray Industries, Inc.
    Inventors: Nobuo Tsuchida, Tadashi Kohara, Syozo Morishita, Seiichi Yamagata, Masaaki Sakai
  • Method and apparatus for producing helically wrapped yarn
    Patent number: 4003194
    Abstract: Helically wrapped yarn, having a bundle of substantially parallel core staple fibers, with uniformly helically wrapped staple fibers, and apparatus and method.
    Type: Grant
    Filed: March 24, 1975
    Date of Patent: January 18, 1977
    Assignee: Toray Industries, Inc.
    Inventors: Seiichi Yamagata, Kozo Susami
  • Method and apparatus to start interrupt and stop spinning of a fasciated spun yarn
    Patent number: 3992865
    Abstract: Method and apparatus for starting, interrupting or stopping spinning of a fasciated spun yarn. Staple fibers are false twisted into a yarn, a fluid eddy is applied to the bundle, and separate suction is applied, cutting off temporarily the suction air current separately provided. Yarn formation is continued while re-applying the suction air current separately applied.
    Type: Grant
    Filed: July 29, 1975
    Date of Patent: November 23, 1976
    Assignee: Toray Industries, Inc.
    Inventors: Nobuo Tuchida, Seiichi Yamagata, Masaaki Sakai, Itsuo Nakamura, Tadashi Kohara, Syozo Morishita, Satoshi Kukino
  • Helically wrapped yarn
    Patent number: 3978648
    Abstract: Helically wrapped yarn, having a bundle of substantially parallel core staple fibers, with uniformly helically wrapped staple fibers, and apparatus and method.
    Type: Grant
    Filed: April 9, 1974
    Date of Patent: September 7, 1976
    Assignee: Toray Industries, Inc.
    Inventors: Seiichi Yamagata, Kozo Susami