| 摘要 |
<p>Weft feeder for weaving looms, of the type wherein the drum (1) around which the weft yarn winds to form the reserve is held stationary, while the turns (3) of said reserve are laid thereon by a rotating reel (2) and are moved forward, mutually spaced, by a set of columns (5) prevented from rotating in respect of said drum (1), but partially and variably emerging from special seats of its periphery. The ensemble of said columns has a frustoconical profile, each column (5) being tapered towards the feeder outlet end, until it no longer emerges from said seats where there is maximum tapering. A photoelectric cell unit (8), moving parallely to the axis of the drum (1), detects the presence and the consistency of the weft yarn reserve wound thereon, in order to control the rotation and regulate the speed of the motor of said feeder.</p> |
