Paper making and fiber liberation – Apparatus – Running or indefinite length product forming and/or treating...
Reexamination Certificate
2006-11-14
2006-11-14
Hug, Eric (Department: 1731)
Paper making and fiber liberation
Apparatus
Running or indefinite length product forming and/or treating...
C162S900000, C442S270000, C442S271000, C442S274000, C442S275000, C442S324000, C442S329000, C442S361000, C442S383000, C442S388000, C442S392000, C442S407000, C442S415000
Reexamination Certificate
active
07135096
ABSTRACT:
A press felt for use in the press section of a papermaking machine is provided. The press felt includes a base fabric layer and at least one layer of a staple fiber batt material connected thereto. The staple fiber batt material is includes between 20% to 100% by weight of a regenerated cellulosic staple fiber material, such as rayon, and from 80% to 0% by weight of a polymeric staple fiber, such as nylon. A scrim including regenerated cellulosic material can also be incorporated into the press felt construction, either between two layers of batt material, or between a batt layer and the base fabric. The regenerated cellulosic staple fibers of the batt and/or scrim having a dtex from at least about 1.1 to about 44, and are preferably non-fibrillatable. As a further option, at least a portion of the base fabric includes a regenerated celluliosic material.
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Despault Marc P.
Patterson Brady S.
AstenJohnson, Inc.
Hug Eric
Volpe and Koenig PC
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