Textiles: weaving – Weft manipulation – Weaving with stationary weft supply
Patent
1983-10-19
1985-07-09
Jaudon, Henry S.
Textiles: weaving
Weft manipulation
Weaving with stationary weft supply
139450, 139341, 1393702, D03D 4100
Patent
active
045275980
ABSTRACT:
Two sensors are arranged on the catch side of the weaving shed of the weaving machine. These two sensors scan the length of the weft-thread end which protrudes from the weaving shed beyond the catch side end thereof and define a range of reference or set values for the length of the protruding weft-thread end. When the front end of the weft-thread, upon standstill of the weft thread after the weft insertion operation, is located within the range of the reference or set values, there is not accomplished readjustment of the weft-thread brake. When the front end of the weft thread falls short or upstream of a first one of the two sensors which is placed close to the catch side end of the weaving shed, then the closure of the weft-thread brake is effected at a later moment of time during the next weft insertion operation. When the end of the weft-thread passes beyond or downstream of a second one of the two sensors which is placed further from the catch side end of the weaving shed, then the weft-thread brake is readjusted so as to close at an earlier moment of time. A minimum of weft-thread waste thus results and the ends of the weft thread always have substantially the same length.
REFERENCES:
patent: 4270579 (1981-06-01), Nakanishi
patent: 4415008 (1983-11-01), Keller et al.
patent: 4421143 (1983-12-01), Weidmann
patent: 4458726 (1984-07-01), Wenig
Jaudon Henry S.
Kleeman Werner W.
Sulzer Brothers Limited
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