Drafting unit for a ring spinning device with two delivery rolle

Details Drafting unit for a ring spinning device with two delivery rolle Drafting unit for a ring spinning device with two delivery rolle

1996-01-19

1997-04-08

Stryjewski, William

Textiles: spinning, twisting, and twining

Apparatus and processes

With drafting

57 75, 57333, 57350, D01H 528, D01H 1304

Patent

active

056177143

ABSTRACT:
A drafting unit for a ring spinning device is described for use on a ring spinning device, comprising two delivery rollers (1, 2) defining between them a delivery nip (3) for at least one drawframe-treated roving (4), one of them forming a deflection length (5) with a slot-shaped suction zone (6) for the roving (4) exiting the exit nip (3), which extends between the delivery nip (3) and a pressure roller (7) arranged downstream in the sense of deflection, and having an air nozzle (8) offset sidewards with respect to the suction zone (6) for a blast of air directed towards the delivery roller (1) with a flow component transverse to the suction zone (6) which extends in an arc-shaped path between its feed end and its discharge end with the air nozzle (9) on the inside of the arc. To smoothly process long-staple fibres it is suggested that an additional air nozzle (9) associated with the pressure roller (7), which has a flow component transverse to the suction zone (6), be provided on the inside of the arc of the suction zone (6).

REFERENCES:
patent: 4953349 (1990-09-01), Fehrer
patent: 5085046 (1992-02-01), Fehrer
patent: 5090192 (1992-02-01), Stahlecker
patent: 5228281 (1993-07-01), Stahlecker
patent: 5243813 (1993-09-01), Stahlecker
patent: 5285624 (1994-02-01), Stahlecker
patent: 5431005 (1995-07-01), Fehrer

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