Patents by Inventor Yasuhiro Ishizuka

Yasuhiro Ishizuka 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 and apparatus for producing spun yarn
    Patent number: 4593522
    Abstract: An apparatus and method for producing a spun yarn having true twist comprising extracting staple fibers from a bundle of staple fibers; and collecting the extracted staple fibers on the periphery of a spinning rotor; and recontacting the extracted fibers with the bundle of staple fibers to form a combined untwisted yarn; and twisting the combined untwisted yarn to produce a twisted yarn; and withdrawing the twisted yarn from the spinning rotor.
    Type: Grant
    Filed: June 2, 1983
    Date of Patent: June 10, 1986
    Assignee: Toray Industries, Inc.
    Inventors: Yasuhiro Ishizuka, Takashi Nakayama, Seiichi Yamagata