A method and device for web cutting in the former of a paper...

Details A method and device for web cutting in the former of a paper... A method and device for web cutting in the former of a paper...

D - Textiles, Paper

21

F

D21F 7/00 (2006.01) D21F 1/00 (2006.01) D21F 9/00 (2006.01)

Patent

CA 2141597

A method and device for cutting a paper web (9) in a twin wire former (1) is described, said web being formed between two forming fabrics (4, 5) while wrapping a section of a forming roll (3), and the web cutting being carried out with the aid of jet cutters (10, 11) discharging jets of pressure medium so that a paper web of final width is obtained and, when applicable, a tail in the web. According to the invention the jet cutters (10, 11) are arranged at the forming roll (3) so that the web cutting is carried out in the web at a point where the recently formed paper web (9) and the forming fabrics (4, 5) together wrap said section of the forming roll (3) in a sandwich structure.

Méthode et installation pour le découpage d'une bande de papier (9) dans une machine à deux toiles dans laquelle la bande de papier en formation entre les deux toiles (4 et 5) est en enroulement sur un rouleau de formation (3) durant son découpage à l'aide de jets de découpage (10 et 11) utilisant un fluide sous pression pour la production d'une bande de papier de largeur déterminée et, le cas échéant, le découpage d'une pointe dans la bande de papier. Aux termes de cette invention, les jets de découpage (10 et 11) sont positionnés au niveau du rouleau de formation (3), de manière à ce que le découpage soit effectué en un point où la bande nouvellement formée (9) se trouve en sandwich entre le rouleau de formation (3) et les toiles de formation (4 et 5).

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