Textiles: spinning – twisting – and twining – Apparatus and processes – Covering or wrapping
Patent
1975-03-26
1977-11-08
Petrakes, John
Textiles: spinning, twisting, and twining
Apparatus and processes
Covering or wrapping
57 516, 57160, 427174, 427180, D02G 336, D02G 334, D02G 340
Patent
active
040569241
ABSTRACT:
Method and apparatus for manufacturing yarn. The yarn has a flexible core at least part of which is twisted in a given direction while surface fibers are carried by the core at least at the twisted part thereof and are helically wound onto the exterior surface of the core in a direction opposite from the direction of twist thereof where the surface fibers are located. The yarn core initially has the fibers projecting laterally therefrom, and then the yarn core is false twisted while the fibers are helically wound into engagement with the exterior surface of the core when the initial twist is introduced into the same during false twisting with the helical winding of the fibers being in a direction opposite to the direction of the twist introduced into the core by false twisting thereof. The false twisting of the core is brought about by a simple rotary member which surrounds the core and is rotated with respect thereto at a speed sufficiently great to provide substantial slippage between the rotary member and the core, this rotary member having an end surface which engages the fibers and winds them helically against the exterior surface of the core during longitudinal feeding of the latter through the rotary member, with this action on the fibers resulting in the false twisting of the core.
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