Yarn control method and apparatus

Details Yarn control method and apparatus Yarn control method and apparatus

1990-05-07

1991-08-27

Schroeder, Werner H.

Sewing

Special machines

Carpet sewing

112 8001, 1122662, D05C 1504, D05C 1508

Patent

active

050424050

ABSTRACT:
A yarn control system and apparatus for use in the manufacture of non-woven, non-knitted fabrics which have a pile supported by a backing cloth, such as carpets, the apparatus including a plurality of needles for inserting yarns from yarn supplies into the backing cloth to provide a pile material and control means for controlling the amount of each yarn inserted by the needles to maintain constant pile height, the control means including a yarn compensating roller upstream of the needles and around which each yarn is entrained, and biassing means acting on the roller to maintain a constant tension in the yarns, the biassing means preferably comprising pneumatic piston and cylinder devices. The compensating roller may have a roughened surface and is preferably able to rotate in one direction only, but in an alternative construction, a driven guide roller which has a roughened surface is provided and the compensating roller has a smooth surface.

REFERENCES:
patent: 2747534 (1956-05-01), Piper et al.
patent: 2908013 (1959-10-01), Keen et al.
patent: 3112721 (1963-12-01), Oberholtzer et al.
patent: 3203378 (1965-08-01), Dedmon
patent: 3359934 (1967-12-01), Schwartz et al.
patent: 3393653 (1968-07-01), Ellison
patent: 3396687 (1968-08-01), Nowicki
patent: 3416471 (1968-12-01), Ellison et al.
patent: 3421929 (1969-01-01), Watkins
patent: 4062308 (1977-12-01), Spanel et al.

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