Method and device for forming a bunch winding on a fresh bobbin

Details Method and device for forming a bunch winding on a fresh bobbin Method and device for forming a bunch winding on a fresh bobbin

1976-04-14

1978-01-24

Gilreath, Stanley N.

Winding, tensioning, or guiding

Coil holder or support

Spool or core

242 355A, 242 41, B65H 5402

Patent

active

040699838

ABSTRACT:
After doffing a full size yarn package from a bobbin holder of a takeup apparatus, a fresh bobbin is mounted thereon. A supplying thread via a thread guide is then sucked into an aspirator disposed adjacent to the takeup unit. Next, a portion of the thread upstream from the aspirator is caught by a cut-out groove at a free end of the bobbin holder and a helical winding is formed from the groove to a position on the fresh bobbin where the distance from the thread guide is minimum, and an initial bunch winding is formed at this position. Thereafter, the helical winding is eliminated by forming an additional bunch winding from a part thereof while the remaining part is sucked into the aspirator.
The above method is applied to a takeup unit with a bobbin holder capable of mounting a plurality of bobbins so as to simultaneously form yarn packages from continuously supplied supplying threads. The bunch winding forming operation is carried out separately and sequentially from a bobbin furthest from the free end of the bobbin holder and, after a bunch winding is formed on each of the fresh bobbins all supplying threads are simultaneously introduced into respective traverse guides and normal takeup operation of the takeup unit is commenced.

REFERENCES:
patent: 3559903 (1971-02-01), McDermott et al.
patent: 3762661 (1973-10-01), Lucke
patent: 3777996 (1973-12-01), Torii
patent: 3801030 (1974-04-01), Kobatake et al.
patent: 3820730 (1974-06-01), Endo et al.
patent: 3908918 (1975-09-01), Bergstrom
patent: 3948452 (1976-04-01), Burysek et al.
patent: 3971517 (1976-07-01), Matuura et al.

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