Method and apparatus for precision pattern knitting on a warp kn

Details Method and apparatus for precision pattern knitting on a warp kn Method and apparatus for precision pattern knitting on a warp kn

1996-05-14

1997-12-23

Calvert, John J.

Textiles: knitting

United needle machines

Straight

D04B 2714

Patent

active

056996810

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.

REFERENCES:
patent: 1977729 (1934-10-01), Lieberknecht
patent: 2539295 (1951-01-01), Cientimack
patent: 3036448 (1962-05-01), Cundiff
patent: 4069690 (1978-01-01), Smith
patent: 4382371 (1983-05-01), Dale et al.
patent: 5375435 (1994-12-01), Gille et al.

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