| 摘要 |
<p>Strands of glass filaments are advanced directly from the bushings in which they are formed to a chopper. The chopper is arranged to issue short lengths of strand along a generally horizontal trajectory to deposit the strand on a conveyor with a component of motion in the conveying direction. Cantilever mounted blade, and back-up rolls have their axes horizontal and are generally one above the other. Starting of the strand is facilitated by a back-up roll of substantially greater axial length than the blade roll so that strand can be carried over a guide and at least partially around the unobstructed, free end of the back-up roll to initiate the pulling of the strand. A hold-down roll having a tapered nose and of an axial length intermediate that of the back-up roll and blade roll is brought into pressure engagement with the back-up roll after the initial strand turn is taken. The drive of the blade roll and back-up roll at the filament pull speed of the bushing is quickly achieved as the strand guide, aligned with the blade roll, directs the strand along a helical path and into the blade roll.</p> |
