Method of regulating warp yarn tension in a weaving machine

Details Method of regulating warp yarn tension in a weaving machine Method of regulating warp yarn tension in a weaving machine

1983-11-10

1985-11-26

Kee Chi, James

Textiles: weaving

Warp manipulation

Feeding

139110, D03D 4906

Patent

active

045549516

ABSTRACT:
A method of regulating the tension of warp yarns in a weaving machine is disclosed herein. Displacement of a tension roller, which is movable with a change in warp yarn tension, from a reference position corresponding to an optimum tension of the warp yarns in the weaving machine is detected by a sensor, which then converts such mechanical displacement of the tension roller into electrical signals proportional to the amount of said displacement. The signals are sampled successively in synchronism with the operation of the weaving machine. Adjustment of the speed at which a warp beam is rotated is made depending upon the data from sampled signals in such a way that the speed is decreased when the tension is dropped beyond the lower limit of a predetermined range, while it is increased when the tension is built up to exceed the upper limit thereof. In addition, adjustment of the warp beam rotational speed is made such that the speed is increased when the tension is built up so rapidly within the range as to exceed a predetermined rate, while it is decreased when the tension is dropped so rapidly within the range as to exceed said rate.

REFERENCES:
patent: 3125127 (1964-03-01), Locher
patent: 3753451 (1973-08-01), Hosono et al.
patent: 3930523 (1976-01-01), Garcia
patent: 4122873 (1978-10-01), Pfarrwaller et al.

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