Paper making and fiber liberation – Apparatus – Running or indefinite length product forming and/or treating...
Patent
1998-02-17
2000-03-28
Robinson, Ellis
Paper making and fiber liberation
Apparatus
Running or indefinite length product forming and/or treating...
428217, 428192, D21F 300
Patent
active
060426950
ABSTRACT:
A shoe press belt has both sides coated with a resin layer and one or both layers with side edge portions softer than the middle portion of the resin layer. The hardness of the side edge portions may first decrease stepwise laterally outwardly from the middle portion to a section which overlies the edge of the shoe, and then increase stepwise laterally outwardly to the edge of the belt. A first stepwise reduction in hardness may begin laterally inward of the edge of the wet paper sheet and extend laterally outwardly to the edge of the wet paper sheet, where a second stepwise reduction begins that extends laterally outwardly beyond the edge of the shoe. Laterally outwardly of the second reduction, a stepwise increase in hardness extends to the edge of the belt. Alternatively, each side edge portion may be of a single hardness, less than the hardness of the middle portion, and each side edge portion overlies one of the side edges of the shoe.
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Ichikawa Co. Ltd.
Lee Laura L.
Robinson Ellis
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