Weft thread break detector with a time delay circuit

Details Weft thread break detector with a time delay circuit Weft thread break detector with a time delay circuit

1989-12-05

1991-03-12

Falik, Andrew M.

Textiles: weaving

Weft manipulation

Means for withdrawing defective weft

1393702, 139452, D03D 4734, D03D 5134

Patent

active

049985671

ABSTRACT:
An airjet weaving machine with a weft thread supply includes a plurality of yarn packages, thread preparation mechanisms, and thread blocking devices on the thread preparation mechanisms. A thread break detector is mounted between the yarn packages and the thread blocking devices. Upon detection of a thread break, a control unit deactivates the thread preparation mechanism in which the thread break has occurred, and thread removal devices are subsequently activated a pre-determined time interval after detection of the thread break so that at least a weft thread section into the main nozzle is removed in order to prevent the broken off piece of weft thread from becoming entangled with other weft threads and thus being blown together with the other weft threads into the shed, or to prevent the broken off piece from blocking other main nozzles.

REFERENCES:
patent: 4815502 (1982-03-01), Takegawa
patent: 4832091 (1989-05-01), Shaw

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