Textiles: spinning – twisting – and twining – Apparatus and processes – Twist setting
Patent
1985-12-20
1987-09-15
Petrakes, John
Textiles: spinning, twisting, and twining
Apparatus and processes
Twist setting
28271, 57284, 57328, 57333, D02G 102, D02G 104, D02G 116
Patent
active
046930710
ABSTRACT:
Positive twist control and a gentle action on the yarn are provided by a vacuum texturizing process for yarn. Single filament and multi-filament yarns can be processed, including fine denier filaments and/or weak thermoplastic filaments. Yarn is fed by feed rolls to a heater block and then to the generally axially through-extending passageway and a spindle perforated cylinder. The spindle is mounted for rotation about an axis, and is rotated at a speed of several hundred thousand rpm, while a vacuum in the range of about 8-12 inches of mercury is applied to the exterior of the cylinder. The force of the vacuum holds the yarn against the interior wall of the passageway so that each rotation of the cylinder causes a twist of the yarn, which is backed up to the heater and set in a semi-permanent, false twist configuration. The yarn is withdrawn from the cylinder by output means, at which time the twist relieves itself and a textured, bulk, stretch-type yarn is produced.
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Burlington Industries Inc.
Petrakes John
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