| 摘要 |
<p>There is disclosed a nozzle having a pair of rollers arranged at the end over a suction slot. A smooth contact roller of the pair is arranged toward the outside for contacting the surface of a wound thread member rotating against it. The other clamping roller is rotated by contact with the contact roller and spaced back from the wound thread member. The contact roller is movably mounted so that the contact pressure forces it into rolling contact also with the clamping roller. The clamping roller is a multiple worm roller, by which along the contact line of the two rollers there are a series of clamping points which tug at the thread as it is pulled into the nozzle by the suction through spaces separating the clamping points along the length of the rollers. The contact roller may be tapered to a smaller diameter toward the middle, with the clamping roller being correspondingly tapered to a larger diameter toward the middle. This reduces the rolling pressure against the wound thread member in that portion where the thread is most likely to be unwinding from it.</p> |
