| 摘要 |
Upon the start of spinning a thread (F), two auxiliary roll-pairs (20, 21) bring an end (E) of the concerned thread into a preparatory position (P) within an entrainment zone of a suction induced air stream, which stream enters an open-end spinning apparatus (10). At this point, in order to uphold the continuity of the thread, the said auxiliary roll-pairs (20, 21) are stilled in their revolution. With renewed drive, the second roll-pair (21), located more distant from the open-end spinning apparatus (10), causes a reversely directed thread movement, whereby, between the two said roll-pairs (20, 21), a thread surplus is created. This thread accumulation between the roll-pairs 20, 21 is retained in a pneumatic thread storage unit (23). The second auxiliary roll-pair (21) is then stopped from further rotation. The first auxiliary roll-pair (20), proximal to the open-end spinning apparatus (10), now opens itself, thus freeing its clamp on the thread. Subsequently, the action of the air stream in the thread storage unit (23) is ended by means of a positioning device (4), or alternately, the air flow may be reversed in its direction. The thread, which is released (F) by the described action, is picked up by the suction induced air stream which is entering the open-end spinning apparatus (10) and contacts a fiber collection surface (101). At this location, the thread end interbinds with incoming fibers. The thread, now renewed in continuity, is removed from said surface with the aid of the second auxiliary roll-pair (21) and is delivered to a main withdrawal roll-pair (13). In case the diameter of the spin rotor be changed, complementarily, the size of the accumulation of the stored thread between the auxiliary rolls (20, 21) is made to conform to the new diameter by means of adjustment apparatus (30).
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