The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 25, 1988
Filed:
Sep. 17, 1987
Takami Sugioka, Matsuyama, JP;
Yuichi Masaoka, Matsuyama, JP;
Teijin Seiki Company Limited, Osaka, JP;
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 decreasing gradually the number of yarn traversing strokes from the upper limit value of the yarn winding angle to the lower limit value with a gradient larger than that of the winding ratio.