Method in the regulation of a multi-layer headbox and a multi-layer headbox
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United States of America Patent
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Feb 13, 1996
Grant Date -
N/A
app pub date -
Jun 30, 1994
filing date -
Jul 1, 1993
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method and device for the regulation of a pulp suspension flow in a multi-layer headbox and a multi-layer headbox for a paper machine/board machine. For the formation of different layers in the web, at least two pulp suspensions having different pulp concepts flow through the multi-layer headbox. The flow of a pulp suspension that forms one of the layers in the web is regulated by regulating the component flows that constitute this flow and regulating the concentration of the component flows independently from one another. In this manner, i.e., by regulating only this the particular layer, the total flow of the pulp suspension leaving the headbox is regulated.
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