Plastic barrier closure and method of fabrication

B - Operations – Transporting – 65 – D

Patent

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Details

B65D 41/04 (2006.01)

Patent

CA 2481398

The present invention relates to a plastic barrier closure (or cap) for bottles and the like that has (1) a body having a top wall, a side wall, a securing means and a seal that has at least one concentric sealing member extending from the top wall, and (2) a barrier incorporated into the top wall. The barrier layer may be incorporated into the top wall by (1) depositing a melted mass of barrier polymer in the pre-molded cap body and then molding it into place by mechanical means or (2) forming a barrier layer from the barrier polymer and inserting it into a pre-molded cap body.

La présente invention concerne un bouchon étanche en plastique (ou capuchon) ainsi que des bouteilles et analogues. Ledit bouchon présente (1) un corps constitué d'une paroi supérieure, d'une paroi latérale, d'un moyen de fixation et d'un joint d'étanchéité présentant au moins un élément d'étanchéité concentrique s'étendant depuis la paroi supérieure, et (2) une couche barrière incorporée dans la paroi supérieure. La couche barrière peut être incorporée dans la paroi supérieure (1) par dépôt d'une masse fondue de polymère barrière dans le corps de capuchon prémoulé puis son moulage en place par un moyen mécanique ou (2) par formation d'une couche barrière à partir du polymère barrière et son insertion dans un corps de capsule prémoulé.

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