Patents by Inventor Yuichi Masaoka

Yuichi Masaoka 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).

  • Patent number: 4779813
    Abstract: A method and apparatus for performing the method of winding a yarn on a bobbin holder so as to avoid a ribbonning phenomenon produced during winding, comprising the steps of rotating the bobbin holder; traversing the yarn along an axis of the bobbin holder to form a yarn package on the bobbin holder; setting a ribbon occurrence width and a lower limit value of a yarn winding angle at which the yarn is wound with respect to a vertical plane perpendicular to an axis of rotation of the bobbin holder; calculating an upper limit value of the yarn winding angle from the lower limit value in such a manner that a winding ratio, which is defined as a ratio of the number of rotations of the bobbin holder to the number of yarn traversing strokes, is not within the ribbon occurrence width; and as soon as the winding ratio reaches the lower limit value of the yarn winding angle, increasing rapidly the number of yarn traversing strokes from the lower limit value of the yarn winding angle to the upper limit value, and then
    Type: Grant
    Filed: September 17, 1987
    Date of Patent: October 25, 1988
    Assignee: Teijin Seiki Company Limited
    Inventors: Takami Sugioka, Yuichi Masaoka