Method and apparatus for inserting weft threads into the loom sh

Details Method and apparatus for inserting weft threads into the loom sh Method and apparatus for inserting weft threads into the loom sh

1986-06-30

1987-10-27

Jaudon, Henry S.

Textiles: weaving

Weft manipulation

Weaving with stationary weft supply

139450, D03D 4734

Patent

active

047022841

ABSTRACT:
The weft thread is inserted into a loom shed by a gripper seizing the thread end with clamping jaws. The thread end is presented to the jaws by a suction effect when the jaws are at a standstill or just starting to move toward the loom shed. The suction effect cooperates with a thread pull-back member and, if desired, with an auxiliary thread clamp for shortening the length of thread protruding from the jaws to reduce waste. The suction effect is applied by a suction pipe having a suction slot extending across the suction pipe in the direction of the weft thread between a cut-off point and a thread presenting eyelet. The suction slot merges into a suction channel leading the free thread end into the clamping jaws and for continuously holding the thread end between cut-off and renewed seizing of the thread end by the gripper clamping jaws for a gentle handling of the weft thread.

REFERENCES:
patent: 3519028 (1970-02-01), Golobart
patent: 4143684 (1979-03-01), Lindenmueller et al.
patent: 4540028 (1985-09-01), Gehring et al.

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