| 摘要 |
An apparatus for treating a thermoplastic, synthetic yarn at a high rate of production, whereby the treated yarn has a high degree of crimp resulting in an enhanced, uniform bulk throughout the length thereof. The apparatus comprises means for heating the yarn to a substantially plastic state, a friction-type false-twist unit positioned to receive the yarn in advance of the friction-type false-twist unit, a pin-type false-twist unit positioned to receive the yarn from the friction-type false-twist unit while at least a portion of the yarn remains plastic for imparting additional false-twist in the same direction as the false-twist inserted by the friction-type false-twist unit. This additional false-twist is applied between the friction-type false-twist unit and the pin-type false-twist unit and the net twist inserted by the friction-type false-twist unit and the pin-type false-twist unit substantially equals the total twist desired to be applied to said yarn.
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