Container wall post-forming

Details Container wall post-forming Container wall post-forming

B - Operations, Transporting

32

B

B32B 27/32 (2006.01) B29C 49/22 (2006.01) B29C 67/00 (2006.01) B32B 15/08 (2006.01) B29C 49/02 (2006.01) B29C 49/04 (2006.01) B29C 55/00 (2006.01)

Patent

CA 2475124

Tube containers that have a barrier structure can be altered in shape by post- forming techniques. This post-forming comprises placing a formed and heated tube on a mandrel and having a surrounding mold having the final desired shape of the tube. The inner wall then is pressurized through the mandrel with an optional use of a vacuum on the mold. The tube walls are altered in shape to a degree that will not be deleterious to the barrier properties of the tube wall.

Cette invention a trait à des contenants sous forme de tube dont la forme d'une structure barrière peut être modifiée par des processus de post-formage. Le procédé de post-formage selon l'invention consiste à placer un tube chauffé sur un mandrin et à disposer autour un moule ayant la forme final souhaitée du tube. On met alors sous pression la paroi intérieure du tube au moyen du mandrin, éventuellement en créant une dépression sur les parois du moule. La forme de la paroi du tube est modifiée, mais pas au point de détruire ses propriétés de barrière.

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