| 摘要 |
<p>In a weft feeder (2) for gripper or projectile looms - of the type comprising a body housing a motor, a drum (3) mounted idle on the motor shaft and held stationary around which a winding arm (6) rotated by the motor winds up a weft yarn (f) reserve, a bracket (2A) positioned alongside the drum (3) and carrying means (3A) to detect and control the yarn reserve as well as means (14) to brake the yarn (f) against the end surface of the drum (3) and means to automatically restore the continuity of the weft yarn (f) from the feed spool (1) or reel to the loom - the means to restore the continuity of the weft yarn consist of three compressed air devices acting on said yarn, of which: the first device (20), positioned at the inlet of the weft feeder (2) to withdraw therefrom the broken yarn and introduce therein new yarn fed by the spool (1) or reel, comprises at least a first duct (4) connected to the inlet of the weft feeder, along which duct there are positioned clamping means (7), nozzle means (8) and cutting means (9), and a second duct (10) branching off from the first, close to its outlet into the weft feeder (2), which also has nozzle means (11); the second device (30), positioned adjacent to the weft feeder drum (3) to receive the new yarn fed by the first device (20) and by the winding arm (6) and send it to a fixed point, comprises a curved profiled duct (13) which is either open or apt to open longitudinally towards the drum (3) and has aerodynamic guide means for the yarn; and the third device consists of at least a suction nozzle (15) mounted, downstream of the brake means (14), at the end of the weft feeder bracket (2A) positioned alongside the drum (3). According to the invention, said bracket (2A) positioned alongside the drum (3) is mounted on the weft feeder body housing the motor so as to be moved away from the end of said drum (3), with the brake means (14), and thus move said means and the suction nozzle (15) from their usual position centred on the weft feeder axis, to a position in which the inlet of the suction nozzle coincides with said fixed point. <IMAGE></p> |
