B - Operations – Transporting – 65 – H
Patent
B - Operations, Transporting
65
H
B65H 35/04 (2006.01) B65H 20/02 (2006.01) B65H 20/32 (2006.01)
Patent
CA 2309106
A device for cutting a paper web (P) in the transverse direction has a first continuously driven conveyor (1) for moving the paper web through the device and storing the paper web therein (buffer) during cutting in the form of a loop (20), a stationary cutting device (5), a clamping device (4) for temporarily retaining the paper web, and a second conveyor (6) for moving the paper web further after it is stored. The second conveyor (6) comprises a continuously driven transport roller (6a) and several pressure rollers (6b) that can be intermittently pressed by a lifting device (9) onto the transport roller (6a), the paper web (P) being intercalated between the transport roller and the pressure rollers. The clamping device (4) and the lifting device (9) can be driven in step with the cutting device (5), so that the paper web is retained by the clamping device (4) and the pressure rollers (6b) are lifted from the transport roller (6a) while the paper web is cut. The second conveyor (6) is arranged between the clamping device (4) and the cutting device (5). Its transport roller (6a) has a surface layer (8) with the highest possible coefficient of friction with the paper web (P). The lifting device (9) is designed or can be controlled in such a way that the pressure rollers (6b) are lifted from the transport roller (6a) shortly before the paper web is stretched when the loop (20) is undone.
La présente invention porte sur la coupe d'une bande continue de papier (P) dans le sens transversal, comprenant un premier convoyeur (1) continuellement en action qui déplace la bande continue de papier à travers le dispositif et le stocke en boucle à l'intérieur (réserve) pendant l'opération de coupe, un dispositif de coupe stationnaire (5), un dispositif de serrage (4) pour retenir temporairement la bande continue de papier, ainsi qu'un second convoyeur (6) qui déplace la bande continue plus loin une fois le papier stocké. Le second convoyeur (6) comprend un rouleau de transport (6a) continuellement en action et plusieurs rouleaux de pression. Il est possible de synchroniser le dispositif de serrage (4) et le dispositif de relevage (9) avec le dispositif de coupe (5) de telle sorte que la bande continue soit retenue par le dispositif de serrage (4) tandis que les rouleaux de pression (6b) se relèvent du rouleau de transport (6a) pendant l'opération de coupe. Le second convoyeur (6) est disposé entre le dispositif de serrage (4) et dispositif de coupe (5). Son dispositif de transport (6a) a une couche superficielle (8) dont le coefficient de friction avec la bande continue de papier (P) est le plus élevé possible. Le dispositif de relevage (9) est conçu ou peut être commandé de telle manière que les rouleaux de pression (6b) se relèvent du rouleau de transport (6a) peu avant que la bande continue ne se tende lorsque la boucle (20) est défaite.
Borden Ladner Gervais Llp
Bowe Systec Ag
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