Autolevelling method and apparatus
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United States of America Patent
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Feb 14, 1995
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app pub date -
Dec 17, 1993
filing date -
Dec 21, 1992
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Abstract
An autoleveller derives the signal for its draft correction from an averaged value of the sliver weight or thickness signals in each of a plurality of unit lengths of the sliver path. A preferred embodiment uses upstream and downstream sliver weight or thickness measuring means to derive signals for a draft correction and the gain of a draft correction made in response to the first sliver measuring means is varied in response to the averaged signal from the second sliver measuring means.
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