| 摘要 |
<p>A thread feeding device for textile machines comprising a rotary driving cylinder and an endless belt which, in normal operation, is applied along an arc of a circle against the cylinder to engage and advance thread passing between the belt and the cylinder wherein the belt is mounted on two idler rollers attached to a pivotable supporting arm, characterized in that the supporting arm is combined with means for positioning and pretensioning the belt in an intermediate position between an idle and a working position in which position the belt is in contact with the driving cylinder over an embraced arc and at a pressure much less than that necessary to advance the thread during normal operation.</p> |
