Device and process for dewatering a material web

D - Textiles – Paper – 21 – F

Patent

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Details

D21F 3/02 (2006.01) D21F 11/14 (2006.01)

Patent

CA 2711045

This invention relates to a dewatering device for dewatering a material web (5), particularly a tissue web, in a paper machine where the dewatering device is placed after a forming unit (16) and before a thermal drying device (11). The dewatering device consists of a press roll (1) with a press belt (3) running round it. Here, the material web (5) is carried into the dewatering device either on a water-absorbing belt (4) or on a wire (10). The water-absorbing belt (4) is placed in the dewatering device between the material web (5) and the press belt (3). This invention also relates to a dewatering process performed with the dewatering device.

L'invention concerne un dispositif d'élimination d'eau pour éliminer l'eau d'une bande de matériau, en particulier d'une bande de tissu, dans une machine à papier ; ce dispositif est disposé après une unité de formage (16) et avant un dispositif de séchage thermique (11). Le dispositif d'élimination d'eau est constitué d'un cylindre de presse (1) autour duquel s'enroule une bande de presse (3). La bande de matériau est ici dirigée, dans le dispositif d'élimination d'eau, soit sur une bande (4) absorbant l'eau, soit sur une toile (10). La bande (4) absorbant l'eau est disposée, dans le dispositif d'élimination d'eau, entre la bande de matériau (5) et la bande de presse. L'invention concerne également un procédé d'élimination d'eau qui est mis en oevre avec le dispositif d'élimination d'eau.

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