Textiles: spinning – twisting – and twining – Apparatus and processes – With fluid jet
Patent
1979-12-05
1981-11-03
Watkins, Donald
Textiles: spinning, twisting, and twining
Apparatus and processes
With fluid jet
57309, 57337, 57339, D02J 302, D02G 116
Patent
active
042978378
ABSTRACT:
A method and apparatus is provided for producing a synthetic multifilament yarn having appearance, bulk and hand characteristics of conventional spun yarns of staple fibers while retaining strength characteristics of continuous filament yarns. The multifilament yarn is air jet textured to form loops, bows, coils and the like in at least the surface filaments thereof and at least some of these loops, bows, coils and the like only in the surface filaments are parted while the interior or core filaments remain substantially intact to form a yarn having free filament or fiber ends projecting from a substantially continuous filament core. The interior or core filaments are shielded or protected from being parted by false twisting the yarn (without heat setting the twist therein) to provide a substantially closed form with the interior or core filaments surrounded by the surface filaments and by parting the surface filaments while the yarn has twist therein. Also, other steps are taken and means are provided for limiting the filament parting action solely to the surface filaments. Finally, the yarn is heat set after the filaments are parted and after the twist is removed to fix the characteristics imparted in the previous processing steps therein.
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Bauer Karl
Krenzer Eberhard
Barmag Barmer Maschinenfabrik Aktiengesellschaft
Watkins Donald
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