Electronic control of terry pile warp yarn dispensing rate

Details Electronic control of terry pile warp yarn dispensing rate Electronic control of terry pile warp yarn dispensing rate

1989-10-17

1991-03-26

Falik, Andrew M.

Textiles: weaving

Special-type looms

Irregular warp feed

139102, 139105, D03D 3922

Patent

active

050020951

ABSTRACT:
A terry loom having a negative pile warp let-off motor is electronically controlled to produce terry having uniform pile-to-ground warp ratio. The negative pile warp let-off motor is controlled to dispense pile warp yarn at a rate which yields the desired pile-to-ground warp ratio regardless of the tension on the pile warp yarn. The desired rate of pile warp let-off may be provided to the loom controller as a known quantity or may be calculated by the loom controller based upon the known desired pile-to-ground warp ratio and a measured or preset ground warp let-off rate. The desired pile warp let-off rate is compared to the actual pile let-off rate, and a signal is generated based upon deviations between actual and desired pile warp let-off rates, to control the pile warp let-off motor. Simplified control with uniform pile-to-ground warp ratio is thereby provided.

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patent: 4827985 (1989-05-01), Sugita et al.
patent: 4884597 (1989-12-01), Tamura et al.

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