Pneumatic false-twist spinning process and apparatus
OwnerFritz Stahlecker, Hans Stahleckerinventors
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Abstract
In the case of a process and an arrangement for pneumatic flase-twist spinning having at least one pneumatic false-twist nozzle arranged between a drafting roller device and a withdrawal device, it is provided that the reversing of the twist applied to the sliver by the false-twisting nozzle is at least partially prevented and that fiber ends are spread away from the sliver in the area having an at least reduced twist. In certain embodiments, it is provided that the sliver is only prestrengthened by means of the false-twist spinning and is finished by a subsequent spinning or twisting process.
Claims33
A process for pneumatic false-twist spinning having one pneumatic false-twisting nozzle means including at least one pneumatic false-twist nozzle arranged between a sliver drafting device and a withdrawal device, said process comprising:
- at least partially reducing propogation of the false twist applied to the sliver by the false-twisting nozzle means in the direction of the drafting device to form an area having reduced twist, and
- spreading away fiber ends from the sliver in at least the area having reduced twist utilizing spreading means disposed separate from and downstream of the most upstream portion of the area having reduced twist.
An arrangement for false twist spinning comprising:
- drafting means for drafting sliver to be spun,
- at least one pneumatic false-twisting nozzle for applying a false-twist to the sliver supplied from the drafting means,
- withdrawal means for withdrawing the sliver form the false-twisting nozzle,
- twist propogation reducing means disposed between the drafting means and the false-twisting nozzle and being operative to at least partially reduce propogation of the effective false-twist applied to the sliver by the false-twisting nozzle toward the drafting means to form an area having reduced twist, and
- fiber end spreading means for spreading away fiber ends from the silver at least in the area having reduced twist, said spreading means including means disposed separate from and downstream of the upstream most portion of the propogation reducing means.
Dependencies are inferred from the claim text.