Patents by Inventor Ushio Ryu

Ushio Ryu 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).

  • Winder of synthetic yarn, cheese-like yarn package of synthetic yarn, and method for winding the same
    Patent number: 4986483
    Abstract: A bobbin-type winder for winding a synthetic yarn at a constant speed is disclosed. The winder includes a bobbin shaft having a bobbin mounted thereon and a bobbin shaft driving apparatus, operably connected to a first inverter, for rotating the bobbin shaft. The winder further includes a traverse device for traversing the yarn supplied to the bobbin, and a contacting roll arranged such that it is movable into contact with the circumferential face of a yarn package wound on the bobbin. The contacting roll is driven via a second inverter and a rotational speed detector is provided for detecting the rotational speed of the contacting roll. A controller is electrically connected with the bobbin shaft driving apparatus and the rotational speed detector for controlling the rotational speed of the bobbin shaft in accordance with the detector rotational speed of the contacting roll.
    Type: Grant
    Filed: December 18, 1989
    Date of Patent: January 22, 1991
    Assignee: Asahi Kasei Kogyo Kabushiki Kaisha
    Inventors: Ushio Ryu, Hideo Ono, Kengi Kabashima, Yutaka Masushige, Teruhiko Matsuo, Tadashi Koyanagi