| 摘要 |
Apparatus wherein yarn is twisted by frictional engagement with a high friction rotating surface while it passes between such surface and a stationary or moving, low friction anvil surface forming a barrier with the first rotating surface. The yarn is tensioned toward the barrier on either side thereof to insure frictional engagement of the yarn with the high friction surface, while the high friction member is rotated in a direction such as to move the yarn away from the barrier. Water or some other lubricant may be used to minimize wear on the barrier forming surfaces. Further, the relative position of the first rotating surface and the mating anvil which may be counter or co-rotating with the high friction surface may be changed continuously or intermittently to minimize localized wear of these surfaces.
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