Extended nip press apparatus

Details Extended nip press apparatus Extended nip press apparatus

1998-06-10

1999-03-16

Hastings, Karen M.

Paper making and fiber liberation

Apparatus

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

162361, 492 7, 492 20, D21F 308

Patent

active

058824839

ABSTRACT:
An extended nip press apparatus is disclosed for pressing a web. The apparatus includes an elongate press shoe which defines a concave surface. A backing roll cooperates with the concave surface for defining therebetween an extended nip pressing section for pressing the web. A looped bearing blanket slidably cooperates with the concave surface. The blanket is disposed between the shoe and the backing roll for supporting and guiding the web through the pressing section. A piston is pivotally connected to the press shoe, the piston being selectively urged towards the backing roll. The arrangement is such that when the piston is urged towards the backing roll, the piston urges the shoe and the blanket towards the backing roll so that the web disposed between the blanket and the backing roll is pressed. The piston has a first and a second portion, the first portion being disposed between the second portion and the shoe. At least one resilient pad is disposed between the portions for absorbing shock loads exerted on the blanket during operation of the apparatus so that wear of the blanket is reduced.

REFERENCES:
patent: 4113325 (1978-09-01), Miller
patent: 4673461 (1987-06-01), Roeriyl et al.
patent: 5223100 (1993-06-01), Schiel et al.
patent: 5662777 (1997-09-01), Schiel et al.

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