Universal spinning system

Details Universal spinning system Universal spinning system

1978-05-03

1980-07-01

Watkins, Donald

Textiles: spinning, twisting, and twining

Apparatus and processes

Covering or wrapping

57 7, 57309, 57327, D01H 112, D01H 1330, D02G 340

Patent

active

042099650

ABSTRACT:
The present invention provides a process and apparatus for manufacturing yarn products comprised of an inner core of fibers and an outer layer of fibers. In the process, first fibers have a pre-twist imparted thereto to form a strand which becomes the inner core of the yarn and the pre-twist is retained by passing the yarn between two pinch points. While between the two pinch points, second fibers are juxtaposed to the strand and any untwisting tendency by the inner strand will tend to twist the outer layer of fibers. Optionally, the yarn may undergo a further twisting operation while between the two pinch points after the second fibers have been deposited.

REFERENCES:
patent: 3439491 (1969-04-01), Scruggs
patent: 3445993 (1969-05-01), Vorisek
patent: 3484403 (1969-11-01), Bobkowicz et al.
patent: 3494118 (1970-02-01), Bobkowicz et al.
patent: 3696600 (1974-09-01), Mayer et al.
patent: 3844097 (1974-10-01), Bobkowicz et al.
patent: 3844103 (1974-10-01), Sasaki et al.
patent: 3845611 (1974-11-01), Senturk
patent: 3924396 (1975-12-01), Bobkowicz et al.
patent: 3987612 (1976-10-01), Bobkowicz et al.
patent: 4056924 (1977-11-01), Umiastowski

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