Threaded closure with internal ribs

B - Operations – Transporting – 65 – D

Patent

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Details

B65D 41/00 (2006.01) B65D 1/02 (2006.01) B65D 23/00 (2006.01) B65D 41/04 (2006.01) B65D 41/34 (2006.01)

Patent

CA 2695987

An internally threaded plastic closure in accordance with the present invention includes an array of axially extending, circumferentially spaced internal ribs which intersect the internal thread formation of the closure. By this arrangement, vent passages are defined between adjacent ones of the internal ribs, thus providing the closure with desirable gas venting characteristics, while avoiding the provision of vent grooves extending into the inside surface of the closure side wall, which can undesirably impair the strength of the side wall. By the present construction, the amount of polymeric material from which the closure is formed can be desirably reduced, while maintaining the desired dimensional characteristics of the closure, to facilitate use with existing containers and high-speed capping equipment.

L'invention concerne une fermeture filetée intérieurement en matière plastique comprenant un réseau de nervures internes s'étendant axialement, circonférentiellement espacées, qui recoupent la formation de filet interne de la fermeture. Par cet agencement, des passages de mise à l'air libre sont définis entre des nervures adjacentes des nervures internes, munissant ainsi la fermeture de caractéristiques de mise à l'air libre de gaz souhaitables, tout en évitant la fourniture de gorges de mise à l'air libre s'étendant dans la surface intérieure de la paroi latérale de fermeture, qui peuvent de manière indésirable réduire la résistance de la paroi latérale. Par la présente construction, la quantité de matériaux polymériques à partir de laquelle la fermeture est formée peut être de manière souhaitable réduite, tout en maintenant les caractéristiques de dimension voulues de la fermeture, pour faciliter une utilisation avec des conteneurs existants et un équipement de bouchage à vitesse élevée.

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