| 摘要 |
<p>Weft feeder from which the weft yarn (T) is unwound 'en défilé' from a reserve (R) on a drum (3), on the outlet end of which, upstream of an outlet yarn-guide (4), there acts a yarn braking device (1) comprising a frustoconical braking element (6) with varying flexibility and a cup support (8) with open base, the braking element comprising narrow tongues (7) placed side-by-side. In the braking element, said tongues join together, in the major circumference, into a band (6A) with a smooth and strictly continuous surface engaging the outlet end of the drum (3), while they are free and freely bear, in the minor circumference, against the inner periphery of the cup support (8). The braking element is connected to the cup support such that it can be deformed and/or perform limited movements in every direction. The outlet yarn-guide (4) is separate from the braking element (6) and is kept motionless, coaxial to the drum, while braking takes place.</p> |
