Apparatus for loosening and unravelling a yarn

Details Apparatus for loosening and unravelling a yarn Apparatus for loosening and unravelling a yarn

1989-02-08

1989-12-26

Watkins, Donald

Textiles: spinning, twisting, and twining

Apparatus and processes

Splicing

D01H 1500

Patent

active

048889431

ABSTRACT:
The yarn to be loosened is guided by slots (7;8); it is held on one side thereof and it is cut on the other side. Air is injected by a nozzle (13) for driving the cut end of the yarn into a channel (1), between the bottom (11) of this channel and the longitudinal edge of an adjacent flexible leaf (10) which is vibrated simulatneously at several hundreds of Hz. The air can escape sidewise through a longitudinal opening (4) of channel (1) and entrains the yarn from one side to the other side of the leaf (10) and imparts to this yarn alternatively inverted twists. A further action of the leaf (10) is to pulse the air in the channel and therefore to subject the yarn to intermittently applied pulls.

REFERENCES:
patent: 4170103 (1979-10-01), Norris et al.
patent: 4229935 (1980-10-01), Wain
patent: 4244169 (1981-01-01), Ligones et al.
patent: 4356688 (1982-11-01), Zurcher et al.
patent: 4406115 (1983-09-01), Negaty-Hindi et al.
patent: 4492076 (1985-01-01), Romic et al.
patent: 4528808 (1985-07-01), Luz
patent: 4637205 (1987-01-01), Bodiali et al.
patent: 4693067 (1987-09-01), Locatelli

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