Device and method to control yarn tension and yarn feeder
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Aug 1, 2000
Grant Date -
N/A
app pub date -
Aug 6, 1998
filing date -
Sep 20, 1995
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A device for controlling the tension of a yarn includes a gauge measuring tension of the yarn and optionally a brake driven by the tension gauge to vary braking of the yarn. The gauge comprises electromagnetic control means having a moveable control element subject to a force dependent on the tension of the yarn, and a control circuit. The latter circuit supplies the electromagnetic control means with a current so that the moveable control element remains virtually still in a given position, during variations of the yarn tension. This current is indicative of the tension of the yarn and is measured to obtain a measure of the yarn tension. The device can be associated with a yarn feeder having a drum and moveable eyelet coaxial with the drum.
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