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US 6,352,615 B1Granted
Method and equipment in a paper/board machine for regulation of the difference of draw
AssigneeValmet Corporation
InventorsSeppo Tavi, Harri Mustonen, Antti Komulainen
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Abstract
The invention concerns an equipment in a paper/board machine for regulation of the difference of draw. In the solution in accordance with the invention, the difference of draw in the web is regulated on the basis of the measured tension of the web. Preferably, the regulation of the difference of draw takes place by regulating the drives at the inlet and/or outlet of a web run not supported by a wire.
Claims7
An arrangement in a paper/board machine for regulating the difference of draw of a web, said arrangement comprising:
- means for determining the tension of the web;
- and
- means for adjusting the difference of draw based on said determined tension of the web;
- wherein said means for adjusting the difference the draw comprises first and second motors of first and second nip rolls arranged respectively at an inlet side and outlet side of a free gap of the web;
- and
- wherein said means for determining the tension of the web is arranged in the free gap of the web between said first and second motors.
3 more elements
Dependencies are inferred from the claim text.