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:
Dec. 23, 1997
Filed:
May. 14, 1996
Peter H Nittmann, Wake Forest, NC (US);
Albani Bayeux, Inc., Henderson, NC (US);
Abstract
A method and apparatus for controlling tension of lay-in warp yarns knitted on a warp knitting machine is provided for knitting a fabric having lay-in yarns with varying intermittent spacing between horizontally corresponding lengths thereof. The lay-in warp yarns of a warp knitting machine are preferably dividedly passed by two or more flutter bars which are simultaneously moveable in cooperation with one another to simultaneously and reciprocably increase/decrease and decrease/increase tension on lay-in warp yarns passing thereacross. Alternatively, the two or more flutter bars may simultaneously and reciprocably increase/increase and decrease/decrease tension on the corresponding lay-in warp yarns passing thereacross. Each flutter bar is a shaft with a parallel and spaced-apart contact arm for contacting yarn. The flutter bars are connected such that rotational movement by one flutter bar causes rotational movement of the other flutter bar. A reducer is utilized to motivate at least one of the flutter bars, and the reducer is driven by a servomotor controlled by a suitably programmed computer.