Apparatus for removing fluid from a fibrous web

Details Apparatus for removing fluid from a fibrous web Apparatus for removing fluid from a fibrous web

D - Textiles, Paper

21

F

D21F 5/14 (2006.01) D21F 1/48 (2006.01) D21F 1/52 (2006.01) D21F 5/00 (2006.01) D21F 9/00 (2006.01)

Patent

CA 2325855

An apparatus for removing fluid from a fibrous web (30) in a papermaking machine having a machine direction and a cross machine direction, the apparatus comprising a plurality of generally parallel supports (50) extending in the cross machine direction, the supports being spaced in the machine direction, the supports having mounted thereon respective blades (70) extending in the cross machine direction, the blades being spaced in the machine direction along a convex path for movement of the web over the blades, each blade (70) being movable relative to the respective support (50) in a direction perpendicular to the web such that outward movement of the blade (70) relative to the support (50) presses the blade against the web (30), and a control system for exerting, on each of the blades (70), a force in the direction toward the web (30) so as to press the blade against the web, the control system being operable to vary the force exerted on each of the blades (70) independent of the force exerted on the remaining blades.

Dispositif pour extraire un liquide d'une bande (30) fibreuse dans une machine de fabrication de papier présentant un sens machine et un sens transversal. Le dispositif comporte une pluralité de supports (50) sensiblement parallèles, disposés dans le sens transversal et espacés dans le sens machine. Ces supports portent des lames (70) respectives orientées dans le sens transversal, ces lames (70) étant espacées dans le sens machine le long d'une trajectoire convexe pour permettre à la bande de défiler par dessus les lames. Chaque lame (70) est mobile par rapport au support (50) respectif dans une direction perpendiculaire à la bande, de façon que le mouvement de la lame vers l'extérieur par rapport au support (50) presse la lame contre la bande (30). Le dispositif comprend en outre un système de commande pour imprimer à chacune des lames (70) une force en direction de la bande (30) ayant pour effet de presser la lame conte la bande, ce système de commande permettant de faire varier la force exercée sur chacune des lames (70) indépendamment de la force exercée sur les autres lames.

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