Heated extended nip press with porous roll layers

Details Heated extended nip press with porous roll layers Heated extended nip press with porous roll layers

1987-08-27

1989-10-17

Hastings, Karen

Paper making and fiber liberation

Apparatus

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

34111, 34116, 34123, 100 93R, 162206, 162358, 162375, D21F 300, D21F 500

Patent

active

048744697

ABSTRACT:
An apparatus and method is disclosed for removing fluid from a fibrous web. The apparatus includes a press member and a blanket which cooperates with the press member for defining therebetween an elongate pressing section such that the web is pressed between the press member and the blanket during passage through the pressing section. An elongate shoe urges the blanket towards the press member such that when the web passes through the pressing section, fluid is removed from the web. A heater is disposed adjacent to the press member for transferring heat to the web such that when the web passes through the press section, the web is subjected for an extended period to increased pressure and temperature so that water vapor generated within the pressing section during passage through the pressing section forces the fluid in the liquid phase away from the web. The press member defines a pressing surface which is porous so that delamination of the web is inhibited.

REFERENCES:
patent: 3110612 (1963-11-01), Gottwald et al.
patent: 3797384 (1974-03-01), Hoff
patent: 3799052 (1974-03-01), Kusters et al.
patent: 3815256 (1974-06-01), Ely
patent: 4287021 (1981-09-01), Justus et al.
patent: 4324613 (1982-04-01), Wahren
patent: 4366025 (1982-12-01), Gordon, Jr. et al.
patent: 4710271 (1987-12-01), Miller
patent: 4738752 (1988-04-01), Busker et al.

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