Composite closure having an insert with a peripheral curl

Details Composite closure having an insert with a peripheral curl Composite closure having an insert with a peripheral curl

B - Operations, Transporting

65

D

B65D 51/14 (2006.01) B65D 41/34 (2006.01)

Patent

CA 2536867

A composite closure (10) for a standard 40 mm opening is configured to form a cavity (40) to house a curl (52) of the insert disc. The shell (12) of the closure extends vertically to provide the cavity, and a transition (36) of the shell is thickened to provide strength for the shell's retaining ring. Employing a curl on the insert disc enables the insert disc to be formed of conventional coated steel. Because the channel of the retaining ring (30) is not semi-toroidal or like shape, the container may be formed by a blow trim process without an extra reaming step for preparing the internal portion of the container neck.

L'invention concerne un système de fermeture composite (10) pour ouverture standard de 40 mm, qui est configuré de manière à former une cavité (40), pour loger un bord roulé (52) du disque rapporté (14). L'enveloppe (12) du système de fermeture s'étend verticalement afin de former la cavité et une zone de transition (36) de l'enveloppe est épaissie pour assurer la résistance de la bague de retenue de l'enveloppe. L'utilisation d'un bord roulé sur le disque rapporté permet audit disque rapporté d'être réalisé à base d'acier protégé classique. Comme le canal de la bague de retenue (30) n'est pas de forme semi-toroïdale ou similaire, le récipient peut être obtenu par un processus d'ébarbage par soufflage, sans étape d'alésage supplémentaire pour préparer la section intérieure du col du récipient.

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