Arrangement in an apparatus for drying a fiber web

D - Textiles – Paper – 21 – F

Patent

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Details

D21F 5/00 (2006.01)

Patent

CA 2269628

An arrangement in an apparatus for drying a fiber web, in which apparatus the fiber web (5) is dried between two tight bands (1, 2) moving in the same direction and turning around turning rolls (6a, 6b, 7a, 7b). The first band (1) is heated by means of a pressure chamber (9) and the second band (2) is cooled by means of a water chamber (10). The fiber web (5) is led together with at least one felt or wire (3, 4) through a drying zone formed by the bands (1, 2) in such a way that the fiber web is in contact with the surface of the first band (1) and the felt or wire (3, 4) is between the fiber web (5) and the second band (2). The arrangement comprises means for supporting the wire or wires (3, 4) in such a way that the fiber web (5) is exposed to a compression pressure by the effect of the wire or wires (3, 4) substantially immediately upon coming into contact with the first band.

Dispositif compris dans un appareil servant à sécher une bande de fibres et dans lequel la bande de fibres (5) est séchée entre deux bandes serrées (1, 2) se déplaçant dans le même sens et tournant autour de rouleaux rotatifs (6a, 6b, 7a, 7b). La première bande (1) est réchauffée au moyen d'une chambre de pression (9) et la deuxième bande (2) est refroidie au moyen d'une chambre à eau (10). La bande de fibres (5) est conduite avec au moins une plaque de feutre (3, 4) à travers une zone de séchage constituée par les bandes (1, 2), de telle façon que la bande de fibres se trouve en contact avec la surface de la première bande (1) et que la plaque de feutre (3, 4) se trouve entre la bande de fibres (5) et la deuxième bande (2). Ce dispositif comprend des moyens servant à supporter les plaques de feutre (3, 4), de sorte que la bande de fibres (5) est soumise à une compression sous l'effet desdites plaques (3, 4) pratiquement immédiatement lorsqu'elle vient en contact avec la première bande.

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