Paper making and fiber liberation – Processes of chemical liberation – recovery or purification... – With squeezing – compression – rubbing – kneading
Patent
1998-03-05
2000-08-22
Silverman, Stanley S.
Paper making and fiber liberation
Processes of chemical liberation, recovery or purification...
With squeezing, compression, rubbing, kneading
162 56, 162317, 162 60, 162318, 210401, 210402, 210386, 209 17, D21C 500
Patent
active
061066699
ABSTRACT:
A process for thickening a fibrous pulp suspension by guiding the suspension between a rigid first face and a flexible second face that move in relation to each other and form a converging draining gap, where the first face and/or the second face is/are water permeable, and where the process includes providing the suspension to be drained, forming from the suspension a fibrous pulp layer with a solid matter content of at least about 4% on at least one of the first face and the second face, guiding the fibrous pulp layer into the draining gap, applying a pressure differential in the draining gap via the second face to thicken the fibrous pulp layer, the pressure differential being formed by stretching the second face and pressing the first face and the second face toward each other to drain water from the fibrous pulp layer, and transporting the thickened fibrous pulp from the draining gap.
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Copy of a German Search Report dated Oct. 6, 1997 prepared in connection with German Patent Application No. 197 15 783.1.
Copy of a European Search Report dated Dec. 10, 1997 prepared in connection with European Patent Application RS 98739 DE.
Gommel Axel
Sepke Paul-Wilhelm
Fortuna Jose S.
Silverman Stanley S.
Voith Sulzer Papiertechnik Patent GmbH
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