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Main roll for an air press of a papermaking machine

United States Patent

March 9, 2004
View the Complete Patent at the US Patent & Trademark Office
A roll for use in an air press assembly of a papermaking machine has a pair of ends associated therewith. The roll includes a pair of edge portions with each edge portion extending to one of the pair of ends. Each edge portion has an edge surface portion composed of a first material, the first material having a first hardness. The roll further includes a middle portion located between the pair of edge portions, the middle portion having a middle surface portion composed of a second material. The second material has a second hardness, the second material being harder than the first material. The first material is preferably a soft, seal material which promotes reduced air leakage from the air press assembly.
Beck; David A. (Appleton, WI)
Voith Paper Patent GmbH (Heidenheim, DE)
09/ 965,016
September 27, 2001
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT This invention was made with Government support under Prime Contract No. DE-FC36-01GO10622 awarded by the Department of Energy. The Government has certain rights in this invention.