Calender having moisture profile control

Details Calender having moisture profile control Calender having moisture profile control

1998-04-02

1999-08-17

Chin, Peter

Paper making and fiber liberation

Processes and products

Running or indefinite length work forming and/or treating...

162206, 162361, 100 73, 100 74, 100161, 100163A, D21G 100, B30B 1530, B30B 304

Patent

active

059388951

ABSTRACT:
A calender is provided for calendering a fibrous web wherein the moisture profile of the web can be controlled. The calender includes a plurality of rolls wherein at least one of the rolls comprises a profiling roll. The profiling roll has a plurality of profiling zones extending in a cross-machine direction to define a profiling nip. The roll is independently expandable in each of the zones, such as by an internal pressurized shoe arrangement, so that the pressure in the profiling nip can be varied in the cross-machine direction. A waterbox is positioned adjacent to the profiling nip and water is carried directly into the profiling nip where at least a portion of the water is transferred to the web such that the moisture profile of the web can be varied in the cross-machine direction by varying the nip pressure in the respective profiling zones.

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