Method and apparatus for capping container cans for food...

B - Operations – Transporting – 65 – B

Patent

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B65B 17/02 (2006.01)

Patent

CA 2306826

A film (91) of thermoformable plastic material is heated and positioned on the upper part of a group of cans (4); the film is made to adhere to the surface of said upper part of the group of cans by a thrust action, acting on the top of the film, exerted by a deformable elastic pad (823) in the regions surrounded by the can clinching rim, and by compressed air in the regions external to the can clinching rim, to urge the film downwards; that film portion adhering to the upper part of the group of cans (4) is separated from the rest of the film; the film is previously heated to an appropriate temperature such that, following cooling, it retains its shape and remains adhering to the surface of said upper part.

L'invention concerne un film (91) en matière plastique thermoformable qu'on chauffe et place sur la partie supérieure d'un groupe de boîtes métalliques (4). L'adhésion du film à la surface de ladite partie supérieure est réalisée au moyen d'un tampon élastique déformable (823) exerçant une pression sur le haut du film dans les zones entourées par le bord à clincher des boîtes métalliques, et par air comprimé dans les zones périphériques du bord à clincher des boîtes métalliques, le film étant forcé vers le bas. La partie du film qui adhère à la partie supérieure du groupe de boîtes métalliques (4) est séparée du reste du film. Le film est préalablement chauffé à une température appropriée de manière à conserver sa forme après refroidissement et à continuer d'adhérer à la surface de ladite partie supérieure.

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