Method of starting spinning of a yarn in a friction spinning dev

Details Method of starting spinning of a yarn in a friction spinning dev Method of starting spinning of a yarn in a friction spinning dev

1986-10-24

1987-07-21

Watkins, Donald

Textiles: spinning, twisting, and twining

Apparatus and processes

Piecing up

57401, 57411, D01H 1502, D01H 7885

Patent

active

046809244

ABSTRACT:
In order to start or recommence spinning of a yarn in a friction spinning device, the following method steps are carried out upon start-up of a new spinning operation or upon piecing after a thread break: fibers separated by an opening device are delivered by means of a fiber transporting passage to a rotating friction spinning drum and are twisted to form a twisted fiber structure; when the twisted fiber structure has substantially reached a predeterminate diameter or size, then the twisted fiber structure is transported by an airstream delivered by a pressure duct towards and into a guide tube and is forwarded therein into a convergent space of rotating withdrawal rolls; and the twisted fiber structure is caught at production speed by these withdrawal rolls and delivered on a divergent side of the withdrawal rolls to a receiving suction device which transfers the spun yarn subsequent to the twisted fiber structure to further processing elements.

REFERENCES:
patent: 4070811 (1978-01-01), Fehrer
patent: 4367623 (1983-01-01), Parker et al.
patent: 4541234 (1985-09-01), Wassenhoven
patent: 4570430 (1986-02-01), Stahlecker
patent: 4570434 (1986-02-01), Stahlecker
patent: 4612763 (1986-09-01), Stahlecker
patent: 4628685 (1986-12-01), Stahlecker et al.
patent: 4633660 (1987-01-01), Artzt et al.

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