| 摘要 |
A housing structure is formed with a suction connection to which pneumatic suction is applied, the suction connection internally terminating in a nozzle which surrounds a rotatable centering cone. The support for the spinning cop, externally of the nozzle, is ring-shaped. A thread drawn out by suction through the nozzle past the ring-shaped support can be clamped against the lower surface thereof upon axial movement of a clamping element for a first distance, complete movement of the clamping element then clamping a further portion of the drawn-off thread against a second clamping surface so that the thread will be taut, and placed in interfering position with a knife edge which cuts the thread at a predetermined point to ensure severing of the drawn-off thread. To provide for a long foot lap, the cop can be lifted repeatedly off the support surface after the thread has been first clamped so that thread is unwound therefrom.
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