| 摘要 |
<p>The grooved drum (6) has over its entire length a continuous helical groove (9) and a helical groove (10) made discontinuous by the abovementioned groove and going in the opposite direction, the two directing the thread in two opposed transverse directions, a rotor (11-26) having a rotary movement being placed in front of the drum and being provided with at least one carrier (13, 27) for supplying the thread during its transverse movement. <IMAGE></p> |
