Rotatable thread catcher for weft metering device

Details Rotatable thread catcher for weft metering device Rotatable thread catcher for weft metering device

1991-02-26

1992-04-14

Falik, Andrew M.

Textiles: weaving

Weft manipulation

Weaving with stationary weft supply

1394351, 139453, 2642905, 242 4701, 242 4703, D03D 4736

Patent

active

051038765

ABSTRACT:
The metering device for metering the weft yarn of a loom comprises a metering roller which is disposed between a supply unit and a draw off unit and which, in metering operation, is wrapped around by the weft yarn and determines the weft yarn draw off speed. In the event of a weft yarn break, a new waft start is injected past the metering roller into a catching nozzle and by way of a deflector into a yarn accumulator. A brake terminates the injection step. While a draw off element applies tension to the yarn, the yarn is wrapped automatically and in a number of turns around the metering roller by being moved into a catching zone of a catcher, which is rotatable around the metering roller axis, through the agency of a relative movement between the injected weft yarn and the catcher. During one revolution of the catcher around the roller axis, the weft yarn is deposited on the metering roller in the form of a wrapping. After a number of wraps of weft yarn around the metering roller, a severing element parts off the remainder of the yarn moving towards the accumulator and the resulting new yarn tip is moved by the metering roller into a start position for the weaving cycle.

REFERENCES:
patent: 2674414 (1954-04-01), Hicks et al.
patent: 4102507 (1978-07-01), Hoffmann et al.
patent: 4623007 (1986-11-01), Griffith

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