Process and device for producing a yarn having alternate twists of opposite directions
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United States of America Patent
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Sep 28, 1982
Grant Date -
N/A
app pub date -
Jul 7, 1980
filing date -
Jul 9, 1979
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A process for producing a yarn with alternate twist, which is obtained by intermittently varying the distance which the twist extends back upstream of a false twister. The variation in the distance is produced without braking the yarn and is achieved by means of a blocking device acting intermittently at a point located close to the false twister. The duration of action of the blocking device approximately corresponds to the time taken by a given point on the yarn to cover the distance from a delivery member to the false twister.
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