Felt conditioning system for paper making machines

Details Felt conditioning system for paper making machines Felt conditioning system for paper making machines

D - Textiles, Paper

21

F

92/22

D21F 7/08 (2006.01)

Patent

CA 1238219

ABSTRACT OF THE DISCLOSURE An apparatus for conditioning a paper machine felt having a paper side and a back side comprising a stationary air supply plenum chamber defined by upstanding front, rear, and end walls and extending substantially the entire width of the felt in the cross machine direction, said plenum chamber having an open end lying in confronting relationship with the back side of the felt, a plurality of rib members mounted across the open end between the front and rear walls of the plenum for engaging the back side of the felt being conditioned said rib members each lying along a given radius of curvature with respect to the open end of the plenum, said rib members being spaced from each other in the cross machine direction to define a plurality of air passages extending from the front wall to the rear wall of the plenum and having the same radius of curvature as the ribs so that the open end of the plenum chamber communicates with the back side of said felt thereby permitting air flow from plenum through the felt with minimum obscuration by the ribs, means for sealing the peripheral edges of the open end with the felt to prevent escape of air from the plenum along the surface of the felt, and means for supplying conditioning air at a pressure of between 3 and 15 inches of Mercury to the plenum chamber to flow there through in a direction substantially radially of the felt and for passing through the felt at a flow rate of from 7 to 25 cfm per square inch of plenum opening to remove dirt and water from the felt.

460545

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