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Machine translation
1. (WO1999041176) HIGH SPEED CUTTING ASSEMBLY
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/1999/041176    International Application No.:    PCT/EP1999/000757
Publication Date: 19.08.1999 International Filing Date: 05.02.1999
Chapter 2 Demand Filed:    05.08.1999    
IPC:
B65H 19/26 (2006.01)
Applicants: E.I. DU PONT DE NEMOURS AND COMPANY [US/US]; 1007 Market Street, Wilmington, DE 19898 (US) (For All Designated States Except US).
PETITJEAN, Gilles [BE/BE]; (BE) (For US Only)
Inventors: PETITJEAN, Gilles; (BE)
Agent: POCHART, François; Cabinet Hirsch-Desrousseaux-Pochart, 34, rue de Bassano, F-75008 Paris (FR)
Priority Data:
98400295.6 10.02.1998 EP
Title (EN) HIGH SPEED CUTTING ASSEMBLY
(FR) DISPOSITIF DE COUPE A HAUTE VITESSE
Abstract: front page image
(DE)The invention relates to a cutting assembly for use in thin and ultrathin web winding stations. It also relates to a method for cutting a web using this cutting assembly. According to the invention, the web (1) is cut by a blade (30) with a cutting edge transverse to the web transfer direction; the blade moves between a rearward position and a forward position; in the forward position, the cutting edge is substantially parallel to an axis of the roll (7) receiving the web, and the blade is substantially tangent to a surface of the roll. For cutting the web, the blade is moved from its rearward position to its forward position, so that its speed at the time it engages with said web is at least substantially equal to the speed of the web. This ensures a clean and clear cut of the web. At the same time, it ensures that the leading edge of the web is smoothly and evenly placed on the roll, without any creasing nor folding of the web.
(EN)The invention relates to a cutting assembly for use in thin and ultrathin web winding stations. It also relates to a method for cutting a web using this cutting assembly. According to the invention, the web (1) is cut by a blade (30) with a cutting edge transverse to the web transfer direction; the blade moves between a rearward position and a forward position; in the forward position, the cutting edge is substantially parallel to an axis of the roll (7) receiving the web, and the blade is substantially tangent to a surface of the roll. For cutting the web, the blade is moved from its rearward position to its forward position, so that its speed at the time it engages with said web is at least substantially equal to the speed of the web. This ensures a clean and clear cut of the web. At the same time, it ensures that the leading edge of the web is smoothly and evenly placed on the roll, without any creasing nor folding of the web.
(FR)L'invention porte sur un dispositif de coupe pour poste de bobinage de bandes minces et ultraminces et sur le procédé de coupe associé. La bande (1) est découpée par une lame (30) dont le tranchant est perpendiculaire au sens de déplacement de la bande. La lame évolue entre une position arrière et une position avant. Dans la position avant le tranchant est sensiblement parallèle à l'axe du rouleau (7) récepteur et tangente à la surface du rouleau. Pour la coupe la lame passe de la position arrière à la position avant en se déplaçant au moment ou elle touche la bande à une vitesse sensiblement égale à celle de la bande, ce qui assure une coupe nette de la bande. De plus le tranchant se place délicatement et régulièrement sur le rouleau sans former de gaufrage ni de plis sur la bande.
Designated States: CN, JP, KR, US.
European Patent Office (AT, BE, CH, CY, DE, DK, ES, FI, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE).
Publication Language: English (EN)
Filing Language: English (EN)