Method for piecing a yarn in a friction spinning device

Details Method for piecing a yarn in a friction spinning device Method for piecing a yarn in a friction spinning device

1986-06-16

1987-03-03

Watkins, Donald

Textiles: spinning, twisting, and twining

Apparatus and processes

Piecing up

57 22, D01H 1502, D01H 7882

Patent

active

046465138

ABSTRACT:
To piece up a yarn in a friction spinning device, fibers supplied to a yarn formation position of a friction spinning drum are twisted to form a twisted fiber structure until the latter has sufficient strength for grasping by a suction device moved towards the twisted fiber structure end opposite to yarn withdrawal. The suction device grasps this end and stops such twisted fiber structure. Further fibers wound about the now substantially stationary twisted fiber structure strengthen the so it can be withdrawn by the suction device. Due to such withdrawal and constant further supply of fibers, a yarn-like structure is formed adjoining the twisted fiber structure and such yarn-like structure is also withdrawn. To subsequently again form the actual yarn, withdrawal rollers are engaged so the yarn produced at the yarn formation position is withdrawn at production speed or with a reduced speed still sufficient for forming a yarn. Then the twisted fiber structure and the adjoining yarn-like structure are taken-up by the suction device. Thereafter, taken-up yarn can be transferred to a wind-up device. In the event of a yarn break, the newly-produced yarn is supplied at its yarn end to a yarn-connecting or piecing device which also simultaneously receives a yarn end from the unfinished package. The two yarn ends are interconnected and during such time, the continuously delivered, newly-produced yarn is taken-up by an intermediate storage device, the stored yarn being taken-up again by the package after connection of the two yarn ends.

REFERENCES:
patent: 3640059 (1972-02-01), Lutovsky et al.
patent: 4083171 (1978-04-01), Konig et al.
patent: 4356692 (1982-11-01), Karl et al.
patent: 4485615 (1984-12-01), Pigalev et al.
patent: 4501116 (1985-02-01), Schuller et al.
patent: 4598539 (1986-07-01), Stahlecker et al.

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