Textiles: spinning – twisting – and twining – Apparatus and processes – With drafting
Patent
1984-06-25
1986-01-21
Petrakes, John
Textiles: spinning, twisting, and twining
Apparatus and processes
With drafting
57 5, 57333, D01H 528
Patent
active
045650632
ABSTRACT:
A fiber sliver is drafted to a yarn count in a drafting mechanism and is fed to a false twist unit with a sliver width B1 of 10 to 19 mm. In accordance with the method, by means of the width B1, the fiber sliver leaving the delivery roller pair is divided into a yarn core rotated by the false twist member with a spinning triangle of the width B2 and into edge fibers delivered thereto. The edge fibers are taken up by the rotating yarn core in the suction passage of the false twist unit. The taking-up of the edge fibers occurs in that the front ends of the delivered edge fibers are caught by the rotating yarn core in the region of the narrowest portion of the suction passage and are wound about the yarn core with the same rotational direction as the fiber core but with a substantially larger inclination until the rear end of the edge fibers is wound into the yarn core in the spinning triangle. To maintain the width of the fiber sliver, as delivered by the apron pair and determined by the funnel, until catching of the sliver by the nip line of the delivery roller pair, one of the two aprons is extended into the converging space of the delivery roller pair and both aprons are guided so close to the corresponding roller of the delivery roller pair that the spacings between the aprons and the delivery rollers are close to zero. The spacing between the nip line and the narrowest portion of the suction passage is shorter than the average length of the procesed edge fibers, in order to ensure that the rear end of the edge fibers is not released from the nip line before the edge fibers are wound in the spinning triangle.
REFERENCES:
patent: 3487619 (1970-01-01), Field, Jr.
patent: 4003194 (1977-01-01), Yamagata et al.
patent: 4387487 (1983-06-01), Nakahara et al.
patent: 4412413 (1983-11-01), Sakai et al.
Briner Emil
Stalder Herbert
Kleeman Werner W.
Petrakes John
Rieter Machine Works Ltd.
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