Process and apparatus for piecing a yarn end in an open-end roto

Details Process and apparatus for piecing a yarn end in an open-end roto Process and apparatus for piecing a yarn end in an open-end roto

1999-03-22

2000-08-15

Stryjewski, William

Textiles: spinning, twisting, and twining

Apparatus and processes

Piecing up

57264, 57408, 57411, 57412, D01H 1326

Patent

active

061018031

ABSTRACT:
For piecing a yarn end at a spinning station of an open-end rotor spinning machine, the previously stopped feed roller is re-activated for a short pre-feeding period. The fiber beard, which has been thinned out by the still rotating open roller, can thus renew itself. The fibers which are combed during this pre-feeding period are removed as waste when the spinning rotor is at a standstill. After completion of the pre-feeding period, the feed roller is rotated in reverse so far back until the fiber beard leaves the area of effect of the opening roller. The feed roller is activated again for the actual piecing process.

REFERENCES:
patent: 4059946 (1977-11-01), Boettcher et al.
patent: 5584170 (1996-12-01), Stahlecker
patent: 5640838 (1997-06-01), Bilner et al.
patent: 5673548 (1997-10-01), Raasch et al.
patent: 5676322 (1997-10-01), Stahlecker
patent: 5732543 (1998-03-01), Bungter et al.
patent: 5916118 (1999-06-01), Wassenhoven et al.

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