Textiles: spinning – twisting – and twining – Apparatus and processes – Covering or wrapping
Patent
1982-01-27
1984-04-24
Petrakes, John
Textiles: spinning, twisting, and twining
Apparatus and processes
Covering or wrapping
57403, D01H 113, D02G 336
Patent
active
044440030
ABSTRACT:
In the production of a covered core yarn in pneumatic spinning in a stationary, tubular spinning chamber, an endless thread (2) is covered with staple fibers (1). The staple fibers (1) are brought together with the core thread and are spun overtwisted in a twist blocking device (12). Due to a subsequent partial untwisting of the roving, reverse tying-in of the staple fibers around the core thread is made possible. The staple fibers (1) which are pulled in band form into a turbulence generator (7) from a pair of supply rollers (4) are radially spread successively under negative pressure before twisting by the turbulent air current (17). The turbulent air current (17) flows tangentially in and out through the guide screw of the twist blocking device (12). In one embodiment, the staple fibers (1) are spread in high draft in an eccentrically arranged fiber spreading chamber (8) of the turbulence generator (7) by eccentrically acting turbulent air currents. The fiber spreading chamber (8) of the turbulence generator (7) is eccentrically displaced with respect to the longitudinal axis of the turbulence generator (7).
REFERENCES:
patent: 2911783 (1959-11-01), Gotzfried
patent: 2928228 (1960-03-01), Gotzfried
patent: 3722198 (1973-03-01), Gotzfried
patent: 4253297 (1981-03-01), Pacholski et al.
Murata Machinery Ltd.
Petrakes John
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