Method for regulating basis weight of paper or board in a paper or board machine
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United States of America Patent
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Mar 20, 2001
Grant Date -
N/A
app pub date -
Jun 10, 1999
filing date -
Jun 10, 1998
priority date (Note) -
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Abstract
Method for regulating the basis weight of paper or board in a paper or board machine in which the machine stock is comprised of a number of component stocks and the basis weight of the dry paper or board is measured, preferably by on-line basis-weight measurement at the end of the machine. Based on the stock target of the machine stock formed on the basis of basis-weight regulation and the predetermined stock proportions of the component stocks, a metering target is determined for each component stock. Then, based on the consistency of a component stock measured from each feed line of a component stock and on a metering target determined for each component stock, a flow target is determined for each component stock. Finally, the flow of each component stock is regulated based on the flow target determined for each component stock.
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