| 摘要 |
Multiple twist spindle to impart two+two twists to textile yarns and threads, whether they be continuous filaments or discontinuous fibres, the spindle comprising a spindle support (16) which supports a support (13) for the feed bobbin (12) maintained substantially stationary and two counter-rotating parts, respectively the inner rotary part (18a) and the outer rotary part (18b), the counter-rotating parts (18a, 18b) being coaxial to each other and substantially coaxial to the axis (19) of the spindle (10), the thread (F) unwinding from the feed bobbin (12) and leaving the inversion element (15) located above the bobbin (12) is induced by the counter-rotating parts (18a, 18b) to follow a path which first descends and then ascends, and then sent to collection means, the paths defining respectively an inner balloon (11a) and an outer balloon (11b) rotating outside the feed bobbin (12), the thread (F) receiving two twists for each revolution of each of the counter-rotating parts (18a, 18b), there being included above the feed bobbin (12) at least a tensioning device (14), wherein all the commands and supports for the counter-rotating parts (18a, 18b), the supports for the tensioning device (14) and the supports for the upper inversion element (15) are all located on a single side of the spindle (10) where there is the spindle support (16), the bobbin (12) being located inside a substantially container (42) which extends substantially from the spindle support (16) to the upper inversion element (15), the inner balloon (11a) with a descending path assuming a path which is at least partly collapsed on the outer wall of the container (42) while the outer balloon (11b) with an ascending path expanded outwards assumes a substantially free path guided only in one portion of its lower part.
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