Method of piecing a yarn in an open-end spinning machine

Details Method of piecing a yarn in an open-end spinning machine Method of piecing a yarn in an open-end spinning machine

1983-10-11

1986-12-16

Petrakes, John

Textiles: spinning, twisting, and twining

Apparatus and processes

Piecing up

57302, D01H 1502

Patent

active

046286845

ABSTRACT:
A yarn piecing method in an open-end spinning machine comprises stopping a yarn piecing machine in front of a spinning unit suffering a yarn breakage, reversing a package with a rewinding roller to rewind a yarn therefrom, cutting off the yarn to provide a yarn end having a predetermined length, moving the yarn end to a position upwardly of an outlet of a withdrawal tube in the spinning unit, reversing the rewinding roller again to feed the yarn end through the withdrawal tube to a fiber collecting surface of a spinning rotor in the spinning unit, supplying a sliver with a feed roller into the spinning unit, piecing the yarn end to the sliver on the fiber collecting surface, continuously drawing a pieced yarn from the spinning rotor, and moving the pieced yarn to a position between a presser roller and a draw-off roller which are being rotated while drawing the pieced yarn from the spinning rotor. The presser roller and the draw-off roller are mounted on the open-end spinning machine and adjustable in speed dependent on the yarn number count used for yarn winding operation during a yarn piecing process.

REFERENCES:
patent: 3810352 (1974-05-01), Miyazaki et al.
patent: 4047371 (1977-09-01), Stahlecker
patent: 4107957 (1978-08-01), Stahlecker et al.
patent: 4120140 (1978-10-01), Raasch et al.
patent: 4172357 (1979-10-01), Stahlecker et al.
patent: 4276741 (1981-07-01), Stahlecker et al.

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