Draft apparatus for a spinning machine
First Claim
1. A draft apparatus wherein a plurality of pairs of rollers for sandwiching a sliver under pressure therebetween to feed the same for drafting are arranged along a feed path of the sliver such that they have gradually increasing circumferential speeds in the direction of sliver advancement and at least one pair of sliver compressing members disposed on the sliver path upstream of the drafting action, one of said sliver compressing members in the pair having a circumferential recessed groove for receiving the sliver therein while the other of said sliver compressed members in the pair has a circumferential rib disposed in said recessed groove and configured to press against the sliver received in said recessed groove without causing substantial widthwise sliver expansion, and at least one of said sliver compressing members in the pair being rotatable.
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Accused Products
Abstract
Draft apparatus for use with a pneumatic high speed spinning frame. At least one pair of sliver compressing member are disposed on the sliver path. One of the sliver compressing members has a circumferential recessed groove for receiving the sliver and the other sliver compressing members has a circumferential rib adapted to be fitted into the recessed groove.
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Citations
14 Claims
- 1. A draft apparatus wherein a plurality of pairs of rollers for sandwiching a sliver under pressure therebetween to feed the same for drafting are arranged along a feed path of the sliver such that they have gradually increasing circumferential speeds in the direction of sliver advancement and at least one pair of sliver compressing members disposed on the sliver path upstream of the drafting action, one of said sliver compressing members in the pair having a circumferential recessed groove for receiving the sliver therein while the other of said sliver compressed members in the pair has a circumferential rib disposed in said recessed groove and configured to press against the sliver received in said recessed groove without causing substantial widthwise sliver expansion, and at least one of said sliver compressing members in the pair being rotatable.
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12. In a draft apparatus having a sliver inlet side and a sliver outlet side located downstream thereof, the improvement comprising:
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means for compressing said draft sliver; and draft roller means for guiding said sliver downstream towards said sliver outlet side, said draft roller means being located downstream of said means for compressing. - View Dependent Claims (13, 14)
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Specification