Process for detecting and correcting a fiber orientation cross direction profile change
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United States of America Patent
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Feb 25, 2003
Grant Date -
Mar 15, 2001
app pub date -
Dec 1, 2000
filing date -
Aug 2, 1997
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Process and a device for detecting a change in the fiber orientation cross-direction profile of a paper or cardboard web in the manufacturing process on a paper or cardboard machine. It is recognized that a change in the fiber orientation cross-direction profile in the web is inferred or determined by way of a characteristic change in the basis weight cross-direction profile or at least one measurement quantity that correlates to it, and/or by way of a characteristic change in the basis weight in the travel direction of the web or at least one measurement quantity that correlates to it. The device includes an arrangement for detecting a change in the basis weight cross-direction profile and/or a characteristic chronological course of the change in the basis weight, which is characteristic for a change in the fiber orientation.
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