Weft-braking device for yarn feeders provided with a stationary drum
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United States of America Patent
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Apr 5, 2016
Grant Date -
Jul 4, 2013
app pub date -
Dec 21, 2012
filing date -
Dec 28, 2011
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Abstract
The weft-braking device comprises a first annular plate coaxially supported in front of the delivery end of a stationary drum of a yarn feeder, and a second annular plate which is coaxially biased against the first annular plate by driving elements. The yarn is adapted to run between the annular plates in order to receive a braking action by friction. The driving elements comprise at least one piezoelectric actuator, which is deformable in response to a voltage applied thereto and has a movable operative end which is operatively connected to the second annular plate and a stationary operative end which is anchored to a stationary support.
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