Device and method for producing a material web
AssigneeVoith Patent GmbH
InventorsJoao V. Boechat, Thomas Scherb, Luiz C. Silva, Rogerio Berardi, Daniela Reis
Life of this patent
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Abstract
A device for drainage of a pulp web, particularly a tissue web, having a first pressing zone having a first pressing zone length through which the pulp web is fed horizontally between a circulating, permeable band and a circulating, permeable support band. The first pressing zone is designed such that a fluid can flow through the band, the pulp web and the support band at least on one part of the first pressing zone length. In addition, the device has a subsequent second pressing zone having a second pressing zone length. The pulp web is guided through the second pressing zone between two bands having differing compressibility.
Claims50
A device for dewatering a fibrous web, the device comprising:
- a revolving permeable belt having a first compressibility;
- a revolving permeable support belt having a second compressibility different than said first compressibility;
- a first press zone defined between said revolving permeable belt and said revolving permeable support belt, said first press zone having a first press zone length and configured so that a fluid can flow through said revolving permeable belt, the fibrous web and said revolving permeable support belt in at least a section of said first press zone length, the fibrous web being directed through said first press zone and arranged lying between said revolving permeable belt and said revolving permeable support belt;
- and
- a second press zone following said first press zone, said second press zone defined between said revolving permeable belt and said revolving permeable support belt and having a second press zone length, the fibrous web being carried through said second press zone between said revolving permeable belt and said revolving permeable support belt.
Dependencies are inferred from the claim text.