Process and device for the piecing of an open-end spinning devic

Details Process and device for the piecing of an open-end spinning devic Process and device for the piecing of an open-end spinning devic

1992-05-12

1994-01-18

Crowder, Clifford D.

Textiles: spinning, twisting, and twining

Apparatus and processes

Piecing up

57264, D01H 450

Patent

active

052791041

ABSTRACT:
A process for the piecing of a yarn end on a open-end spinning machine. The yarn is backfed a first time from a cross-wound package, the backfeeding is interrupted and the yarn is clamped at a predetermined distance from the package and the free end is cut. The backfeeding is then resumed for a predetermined period of time and the yarn is temporarily stored between the clamping point and the package. The stored yarn is then wound onto the package in a plurality of parallel windings upon a predetermined generating line. The yarn clamp is released to backfeed the yarn remaining in the temporary storage device and to stretch or tension the yarn between the package and the backfeeding means. The yarn is reclamped and the excess yarn is cut to a predetermined length. The yarn is backfed to the spinning rotor of the open-end spinning machine to combine with fibers in the rotor to piece up the yarn, which is then drawn off the rotor and wound onto the package. The invention also includes apparatus for carrying out the method.

REFERENCES:
patent: 4494371 (1985-01-01), Morita et al.
patent: 4644742 (1987-02-01), Lovas et al.
patent: 4920739 (1990-05-01), Rausch
patent: 5022222 (1991-06-01), Rupert et al.
patent: 5083420 (1992-01-01), Rupert et al.
patent: 5159804 (1992-11-01), Schippers et al.

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