Resealable package, method and apparatus

B - Operations – Transporting – 65 – D

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B65D 33/24 (2006.01) B29D 5/10 (2006.01) B31B 19/90 (2006.01) B65B 61/18 (2006.01) B65D 33/25 (2006.01) B65D 75/58 (2006.01)

Patent

CA 2236365

Flexible packages having a resealable interlocking closure made from a continuous web of flexible film, the closure being formed at line speed across one end of the package transversely to the direction of film flow. A converter is mounted to wrapping machines or overwrap packagers, and uses films such as polypropylene, polyester, polyvinyl chloride, polyethylene and film laminations. The film is fanfolded across its width to form a stack which is heat sealed into a multilayered semi-rigid strip. In one embodiment, the resealable locking feature is thermoformed into the multilayered strip before product packaging, while in another embodiment the semi-rigid strip is formed into the resealable locking closure after product packaging.

Cette invention concerne un emballage souple refermable à bandes de fermeture imbricables réalisé à partir d'une bande continue de pellicule souple, la fermeture étant formée à la vitesse de défilement de la bande, à travers une des extrémités de l'emballage et perpendiculairement au sens de défilement de ladite bande. Un convertisseur associé à des machines d'emballage ou de suremballage met en oeuvre des pellicules comme du polypropylène, du polyester, du polychlorure de vinyle, du polyéthylène et des stratifiés de ces pellicules. La pellicule est repliée sur elle-même transversalement pour constituer un empilage scellé à chaud formant une bande multicouche semi-rigide. Selon une variante, la fermeture à éléments imbricables est thermofaçonnée dans la bande multicouche semi-rigide avant le remplissage de l'emballage tandis que , selon une autre variante, cette fermeture est réalisée après remplissage de l'emballage.

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