Yarn brake for a textile machine

Textiles: weaving – Weft manipulation – Weaving with stationary weft supply

Patent

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Details

139429, 139453, 112155, D03D 4730

Patent

active

043513700

ABSTRACT:
A yarn brake for a textile machine. The yarn brake comprises a stationary clamping plate and a movable clamping plate. The plates are forced together by first and second biasing means to provide full braking pressure on a yarn passing between the plates. De-activating means operate to selectively nullify the effect of the second biasing means to provide partial braking pressure on the yarn, or to nullify the effects of both biasing means so that there is no braking pressure on the yarn. The invention also includes a weft yarn braking system for a multi-weft loom utilizing a yarn brake of the present invention for each weft yarn. Control means, operating in timed relation to the loom, operate the brakes in a programmed sequence. The yarns are fully braked when not being inserted into the loom. When a weft yarn is inserted into the loom, its brake is fully de-activated so that there is no braking pressure on the yarn during the major portions of its insertion into the loom and the brake is partially de-activated during the latter portion of said insertion to provide partial braking of the yarn.

REFERENCES:
patent: 3565121 (1971-02-01), Svaty
patent: 4192357 (1980-03-01), Tanaka et al.

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