Formation of a self twist fibrous structure

Details Formation of a self twist fibrous structure Formation of a self twist fibrous structure

1978-11-09

1980-06-10

Petrakes, John

Textiles: spinning, twisting, and twining

Apparatus and processes

Alternate twist

57350, D01H 790, D01H 792, D02G 326

Patent

active

042065895

ABSTRACT:
A method of forming a self-twisted fibrous structure comprises twisting two strands of similar count such that each has repeated along its length alternating zones of opposite twist, converging the strands at a convergence point such that they partly untwist around one another to form a self-twisted structure and acting on the strands at or downstream of the convergence point by applying further alternating zones of opposite twist so as to modify the strand to ply twist ratio of the structure. The further twist is applied at a point not greater than one half cycle length from the first twist point and at a phase difference 20.degree. to 60.degree. following.

REFERENCES:
patent: 3225533 (1965-12-01), Henshaw
patent: 3443370 (1969-05-01), Walls
patent: 3775955 (1973-12-01), Shah
patent: 4055039 (1977-10-01), Movshovich et al.
patent: 4055040 (1977-10-01), Lin
patent: 4068459 (1978-01-01), Movshovich et al.
patent: 4074511 (1978-02-01), Chambley et al.
patent: 4084400 (1978-04-01), Movshovich et l.

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