Process and device for the piecing of an open-end spinning device
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United States of America Patent
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-
Jan 18, 1994
Grant Date -
N/A
app pub date -
May 12, 1992
filing date -
May 11, 1991
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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