Air nozzle for fasciated yarn spinning

Details Air nozzle for fasciated yarn spinning Air nozzle for fasciated yarn spinning

1982-12-02

1984-10-16

Watkins, Donald

Textiles: spinning, twisting, and twining

Apparatus and processes

False twist device

D01H 113, D01H 7898

Patent

active

044766726

ABSTRACT:
An air nozzle utilized for false-twisting a fiber bundle to form a fasciated yarn, comprising, in series, an inlet and a fiber passage provided with at least a jet for generating a vortex within the fiber passage. The inlet has an opening of a flattened shape having upper and lower walls longer than the side walls thereof and has a size decreasing toward the fiber passage. The edge portion of the ribbon-like fiber bundle passing through the air nozzle strongly contacts the upper and lower walls of the inlet during the twisting operation by the vortex. As a result of frictional resistance with the walls, the twist angle of the edge portion fibers becomes less than that of the core portion fibers. This causes a tightly fasciated effect of the edge portion fibers onto the core portion fibers during the untwisting operation.

REFERENCES:
patent: 3445995 (1969-05-01), Bell et al.
patent: 4114358 (1978-09-01), Tsuchida et al.

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