| 摘要 |
An apparatus for producing a uniform textile fiber sliver which is removed from a sliver supply device, for instance a card, and taken-up by a driven take-up or receiving device, wherein the fiber sliver removed from the sliver supply device is guided through a regulation drafting arrangement having a pair of measuring rolls and a driven pair of drafting rolls. One roll of the measuring roll pair is driven by the sliver supply device, and the other measuring roll is deflected as a function of a change in thickness of the fiber sliver traveling through the measuring rolls. The drive speed of the pair of drafting rolls and the receiving or take-up device is regulated as a function of the deflection of said other measuring roll, and the drive speed of the take-up device additionally is regulated as a function of the length of the fiber band between the pair of drafting rolls and the take-up device. The drive speed of the take-up device additionally is regulated as a function of the drive speed of the sliver supply device and the measuring roll driven thereby. The fiber sliver is guided between the pair of drafting rolls and the take-up device in the form of a loop, and the through-hang of the fiber sliver-loop is continuously changed between a maximum value and a minimum value whenever the minimum through-hang is reached, the drive speed of the take-up device is decreased for such length of time until the through-hang has reached the maximum value, whereafter the drive speed of the take-up device is increased for such length of time until the through-hang again has reached its minimum value.
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