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:
Feb. 16, 1999
Filed:
Oct. 01, 1996
Masahiko Kimbara, Tsukuba, JP;
Three-D Composites Research Corporation, Tsukuba, JP;
Abstract
A yarn tensioning device which is arranged to impart a high unwinding tension to a feed yarn in a yarn draw-out phase of operation and to impart a low unwinding tension with a large yarn draw-back capacity. The yarn tensioning device is is particularly suitable for use on a textile machine which is arranged to produce at three-dimensional fabric by interweaving a large number of yarns 24 fed from yarn carriers 20 which are driven by a carrier drive mechanism to shift the respective positions along predetermined loci of movements within a common carrier shifting plane. Mounted on each carrier 20 is a high tensioning mechanism which acts with a small yarn draw-back capacity and a high yarn tensioning capacity for a feed yarn 24 being unwound from a bobbin 23, in combination with a low tensioning mechanism 22 which acts on the feed yarn with a large yarn draw-back capacity and a low tensioning capacity. As a result, a high yarn tensioning force is applied to the feed yarn by the high tensioning mechanism 21 in a yarn draw-out phase of operation, and a low yarn tensioning force is applied to the feed yarn by the low tensioning mechanism 22 in a yarn draw-back phase of operation past a limit point of yarn draw-back by the high tensioning mechanism 21.