Textiles: spinning – twisting – and twining – Apparatus and processes – Twist setting
Patent
1978-11-22
1981-01-13
Petrakes, John
Textiles: spinning, twisting, and twining
Apparatus and processes
Twist setting
57 2, 57284, 57332, D02G 102, D02G 104
Patent
active
042441757
ABSTRACT:
A three-dimensioned crimp filament is prepared by twisting a bundle of large denier filaments into a single twist while said filaments are stretched between a freely-rotatable first roller with a peripheral groove having 10-500 mm of diameter at a grooved portion and at least one other freely-rotatable second roller in a total denier of 50,000-3,000,000 denier by means of twisting action in a subsequent double twist step, double twisting said single-twisted filaments into a double twist up to said first roller and heating the filaments thus twisted into a double twist while passing them through a tubular guide means, cooling said double-twisted filaments to effect a heat-set while maintaining the twisting action; untwisting said double-twisted filaments thus heat-set to form three-dimensioned crimp filaments, and cutting said untwisted three-dimensioned crimp filaments into stable lengths. The diameter of the first roller at the grooved portion is correlated with the diameter of the double-twisted filaments formed to prevent the spread of the double twist back beyond the first roller, and the width of the peripheral groove and the diameter of the tubular guide means are sufficient freely to receive the double-twisted filament but insufficient to allow it to curl into a greater multiple twist.
REFERENCES:
patent: 2959906 (1960-11-01), Richter
patent: 3017684 (1962-01-01), Pittman
patent: 3034277 (1962-05-01), Richter
patent: 3328950 (1967-07-01), Scragg et al.
patent: 3379003 (1968-04-01), Kanbar
patent: 4154051 (1979-05-01), Takagi
Hueschen Gordon W.
Petrakes John
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