Weft thread braking mechanism having a stepwise controllable bra

Details Weft thread braking mechanism having a stepwise controllable bra Weft thread braking mechanism having a stepwise controllable bra

1985-12-09

1987-02-10

Jaudon, Henry S.

Textiles: weaving

Weft manipulation

Weaving with stationary weft supply

188 651, 242149, D03D 4734

Patent

active

046416889

ABSTRACT:
A weft thread brake for shuttleless weaving machines includes two leaf springs or lamellae which rest against each other in a spring elastic manner. The thread, such as a weft thread, passes through a passage formed between the two leaf springs as the thread is being pulled off a supply reel or bobbin whereby the two leaf springs apply a braking action to the thread. In their basic position the leaf springs exert a first step of a defined braking action on the thread. Additionally, controllable members are arranged for cooperation with the leaf spring or springs to increase or decrease the pressure of the two leaf springs toward each other. Electromagnets, compression elements, or the like, are suitable for this purpose, whereby the actuation of these control members increase the braking action even to the extent of clamping the weft thread between the leaf springs if desired.

REFERENCES:
patent: 4512375 (1985-04-01), Deborde et al.

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