18—OSCILLATING ROLLERS FOR SELF-TWIST SPINNING

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Abstract
A method is described for making self-twist yarns by using rollers that simultaneously rotate and oscillate. The technique provides a substantial improvement over previously known methods. The twisting action of sinusoidally oscillating rollers is examined theoretically and comparison made with twist levels observed experimentally. The resultant understanding enables machine parameters to be selected to give desired twist-cycle-length characteristics in in-phase self-twist yarns.

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