| 摘要 |
Apparatus for twisting a travelling strand comprises a rotary structure (12) rotatable about a rotational axis X-X and a series of pulleys (48, 50, 52, 54 and 56) mounted on structure (12) in an array disposed about the rotational axis X-X with each pulley in the series rotatably mounted on structure (12) for rotation about an individual axis of pulley rotation which is generally parallel to the axis X-X and moves around that axis on rotation of the structure (12). An input strand guide pulley (60) guides an input strand to be twisted into a path in which it will successively engage the pulleys (48, 50, 52, 54 and 56) and a strand exit guide pulley (62) guides the strand from that path into an exit path along the axis X-X. Rotary structure (12) is driven through a drive shaft (16) and the pulleys (48, 50, 52, 54 and 56) are rotated by gearing (32).
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