Textiles: spinning – twisting – and twining – Strand structure – Alternately twisted
Patent
1994-11-14
1996-09-24
Stryjewski, William
Textiles: spinning, twisting, and twining
Strand structure
Alternately twisted
57236, 57237, 57242, 57297, D01H 326, D02G 302
Patent
active
055579159
ABSTRACT:
An alternate twist plied yarn formed from a plurality of strands of singles yarn twisted in alternating directions in lengthwise intervals of first half-cycles of twist at a predetermined twist level followed by second half-cycles of twist at the same twist level with reversal nodes therebetween, the singles twisted yarns being ply-twisted together in alternating directions in lengthwise intervals of first half-cycles of ply-twist followed by second half-cycles of ply-twist, there being a bond formed adjacent each node wherein the first half-cycle of ply-twist is located within the bond and the second half-cycle of ply-twist originates at one end of the bond, the twist level in the singles twisted yarn is between 25% in the same direction and 60% in the opposite direction of the twist applied to the singles yarns before plying. The process for making an alternate twist plied yarn formed from a plurality of singles strands wherein the plied yarn has low residual singles twist is disclosed as well as an apparatus for forming bonded alternate twist plied yarn from a plurality of strands having a distance between twist reversal nodes defining sections of alternate twist in the yarn and having bonds in the plied yarn adjacent the reversals.
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Knoff Warren F.
McAllister Robert W.
Popper Peter
Shibata Steven K.
Taylor Robert E.
E. I. Du Pont de Nemours and Company
Stryjewski William
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