Processing device and method of operating the device for...

D - Textiles – Paper – 21 – F

Patent

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Details

D21F 3/02 (2006.01) D21G 1/00 (2006.01) D21H 25/06 (2006.01)

Patent

CA 2472307

The invention relates to a processing device and a method of applying the same for processing a coated or uncoated fibrous web. The device comprises a belt (2) adapted to extend around a guiding element (3), at least one counter- element (5) being disposed outside said belt to provide a contact area with the belt, such that the belt (2) and the counter-element (5) establish there between a web processing zone for passing a web to be processed there through. The processing zone length is defined by means of the disposition/adjustment of the belt~s guiding element (3) and/or by means of the design of the counter- elements (5). The contact pressure applied to a web in the processing zone is adapted to be adjustable within the range of about 0.01 MPa to about 70 MPa. The invention further relates to a method for drying a paper/board web by pressing it in a processing device provided on both sides of the web.

L'invention concerne un dispositif de traitement et un procédé pour son application afin de traiter une bande fibreuse couchée ou non couchée. Le dispositif comprend une courroie (2) adaptée pour s'étendre autour d'un élément de guidage (3), au moins un contre-élément (5) étant disposé à l'extérieur de ladite courroie afin d'établir une zone de contact avec la courroie, de telle manière que la courroie (2) et le contre-élément (5) établissent entre eux une zone de traitement de bande pour passer une bande à traiter dans ladite zone. La longueur de la zone de traitement est définie par la disposition/l'ajustement de l'élément de guidage (3) de la courroie et/ou par la conception des contre-éléments (5). La pression de contact appliquée sur une bande dans la zone de traitement est adaptée pour pouvoir être ajustée dans la plage allant d'environ 0,01 MPa à environ 70 MPa. L'invention concerne également un procédé pour sécher une bande de papier /carton par application d'une pression dans un dispositif de traitement ménagé des deux côtés de la bande.

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