Process for producing a combination yarn

Details Process for producing a combination yarn Process for producing a combination yarn

1979-09-05

1982-12-21

Petrakes, John

Textiles: spinning, twisting, and twining

Apparatus and processes

Covering or wrapping

57401, 57411, D01H 1135, D02G 336

Patent

active

043642233

ABSTRACT:
The object of the process is to produce a yarn comprising a core of continuous filament and a sheath of staple fibers. The staple fibers are delivered to a suction surface comprising a perforated collecting surface exposed to relative suction in a suction zone, the fibers being conveyed in a current of air moving virtually at right angles to the surfaces of two counter-rotating friction discs having narrowly spaced opposing faces defining a gap. From the suction zone, the staple fibers are transferred, generally at right angles to the axis of the current of air, into the gap. The continuous filament is united with the staple fibers in the suction zone, and both components are twisted in the gap between the counter-rotating friction discs.

REFERENCES:
patent: 4107909 (1978-08-01), Fehrer et al.
patent: 4202162 (1980-05-01), Vignon

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