Textiles: spinning – twisting – and twining – Apparatus and processes – Elements
Patent
1977-05-04
1978-06-27
Watkins, Donald
Textiles: spinning, twisting, and twining
Apparatus and processes
Elements
57 34AT, 57 773, 28271, D02G 116, D02G 120
Patent
active
040966879
ABSTRACT:
A method and apparatus are disclosed for producing randomly slubbed textile yarns. The method involves passing the yarn through a zone of fluid turbulence having a pair of counterdirectional fluid streams maintained under different fluid pressures. The yarn passing between these counterdirectional fluid streams is alternately treated in opposing directions, with slubs being formed at the null points between the opposite directional treatments. Due to the uneven fluid pressures employed, the length of treatment in each direction along the yarn is not consistent, thus leading to slubs at various points along the length of the yarn. A fluid jet is also disclosed for accomplishing this result. The fluid jet includes a pair of interconnected and overlapping passageways which form a chamber through which the yarn passes, with each passageway having one or more fluid inlets arranged to direct fluid circumferentially around it and with the fluid streams being counterdirectional to one another. The fluid inlets for each passageway are fed fluid at uneven or different fluid pressures to accomplish the random slubbing effect.
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McDonald Alan T.
PPG Industries Inc.
Watkins Donald
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