Paper making and fiber liberation – Apparatus – Running or indefinite length product forming and/or treating...
Patent
1989-05-02
1990-04-17
Hastings, Karen M.
Paper making and fiber liberation
Apparatus
Running or indefinite length product forming and/or treating...
100153, 162205, 162361, D21F 302
Patent
active
049177680
ABSTRACT:
A press with extended nip for paper and board machines includes a support element acting as a counter member; a pressure element disposed opposite the support element and including a press shoe and a carrying element carrying the press shoe and designed to be secured to a stand, the press shoe, together with the support element, forming a pressing zone with extended nip; at least one endless movable fluid-impervious belt, being arranged to pass through the pressing zone in sliding contact with the press shoe; and at least one endless, liquid-absorbing felt, arranged to pass through the pressing zone together with a fiber web to be dewatered. The pressure element includes a plurality of jacks disposed in at least one row across the belt and having piston rods acting on the press shoe to force it against the support element, the press shoe being freely supported by the piston rods without rigid mechanical connection therebetween, and the pressure element being provided with a support bearing disposed downstream of the press shoe to absorb horizontal forces acting on the press shoe during operation, the support bearing including a stationary support element mounted on the carrying element.
REFERENCES:
patent: Re30268 (1980-05-01), Justus
patent: 3853698 (1974-12-01), Mohr
patent: 4272317 (1981-06-01), Roerig
patent: 4556454 (1985-12-01), Dahl et al.
patent: 4568423 (1986-02-01), Laapotti
patent: 4713147 (1987-12-01), Saarinen
Hastings Karen M.
Valmet Paper Machinery Inc.
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