Pile warp thread tension control apparatus for terry cloth weavi

Details Pile warp thread tension control apparatus for terry cloth weavi Pile warp thread tension control apparatus for terry cloth weavi

1996-08-16

1998-03-03

Falik, Andy

Textiles: weaving

Special-type looms

Irregular warp feed

D03D 3922

Patent

active

057224641

ABSTRACT:
The weaving of terry cloth is improved by preventing slackening of the warp threads during beat-up. The warp threads are kept in contact with a warp tensioning faller roller (8) at all times. For this purpose the faller roller (8) is eccentrically mounted and biased by a spring (46) retraction force applied through a control lever (48). The force of the spring (46) is in balance with the tension on the warp threads (4), whereby the spring (46) causes a warp length compensation during shed formation. A piston rod (52A) of a piston cylinder drive (52) acts on the control lever (48) of the faller roller (8). By pressurizing the cylinder (52), the faller roller (8) is tilted about an eccentrically mounted bearing shaft (14) and a rated pile warp thread length (54) is delivered or fed, without the pile warp threads (4) lifting away from the faller roller (8). One chamber of the drive cylinder (52) is periodically pressurized in synchronism with the terry cloth drive (17) for the beat-up of a group of weft yarn threads or both chambers of the drive cylinder (52) are pressurized for weaving a border or trim.

REFERENCES:
patent: 4112981 (1978-09-01), Freisler
patent: 4974639 (1990-12-01), Maitan et al.
patent: 5392817 (1995-02-01), Seifert et al.
patent: 5441084 (1995-08-01), Corain et al.
patent: 5458160 (1995-10-01), Geiger et al.

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