| 摘要 |
PCT No. PCT/DE88/00637 Sec. 371 Date May 11, 1989 Sec. 102(e) Date May 11, 1989 PCT Filed Oct. 16, 1988 PCT Pub. No. WO89/03905 PCT Pub. Date May 5, 1989.A false twisting roll for imparting false twist to an advancing yarn of manmade fibers is disclosed. The roll has a generally conical and somewhat concave surface configuration, and the angle of inclination of the roll axis is adjustable with respect to the yarn path leading into contact with the roll. To insure optimal twisting conditions at all adjustable inclinations of the roll, the position of the pivotal axis of the roll, and the shape of the surface of the roll are adapted to each other so that the yarn path leading into contact with the roll is predetermined and remains constant. This in turn assures that the upstream twisting conditions of the yarn are unchanged.
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