Method of and machine for controlling the nip of the rolls of a calender as an endless planar web is continuously passed through the nip
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United States of America Patent
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Jul 17, 2001
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N/A
app pub date -
Sep 9, 1998
filing date -
Mar 16, 1996
priority date (Note) -
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Abstract
In order to control and optimize, without stopping production, bowing in the outer wall of a calender roll in which bowing is produced by the action of pressure on an incompressible liquid enclosed in the roll, the invention proposes that, based on error signals generated from continuous thickness measurements and from at least one other quality characteristic, the temperature of the liquid is controlled and the nip modified to correct for deviations from the correct thickness.
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