Method and apparatus for tensioning warp threads at weaving a cl

Details Method and apparatus for tensioning warp threads at weaving a cl Method and apparatus for tensioning warp threads at weaving a cl

1978-12-29

1980-11-25

Jaudon, Henry

Textiles: weaving

Warp manipulation

Feeding

D03D 4922

Patent

active

042352606

ABSTRACT:
In accordance with the proposed method, in the course of shedding, thread length compensation after a change of a shed, and adjustment of different amounts of tension applied to tight and slack shed sides, warp threads are placed under a tension close to the looming-up tension maintained while the main shaft turns through from 250.degree. to 340.degree., and at the beat-up moment the warp threads are subjected to a maximum tension, the thread tension being increased while the main shaft turns through the remaining 20.degree. to 110.degree.. In an apparatus for performing this method is provided a device ensuring different amounts of tension applied to tight and slack shed sides which includes guiding rods installed so as to be able to execute alternating oscillatory up and down motion within the shed and a compensating element placed between the guiding rods so as to be able to periodically act upon the warp threads for the latter to rise and lower between the guiding rods at the beat-up moment of the weft thread. This makes it possible to create a short-time maximum load applied to the warp threads substantially only at the beat-up moment of the weft thread, whereby the breakage rate of the warp threads during weaving is reduced and the production of more hard-textured cloths is ensured.

REFERENCES:
patent: 713035 (1902-11-01), Wilde
patent: 1023703 (1912-04-01), Abbott
patent: 3483897 (1969-12-01), Pfarrwaller
patent: 3759299 (1973-09-01), Selivanou et al.

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