Composite closure, method for assembling it and method for...

B - Operations – Transporting – 65 – D

Patent

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Details

B65D 51/14 (2006.01) B65D 45/02 (2006.01)

Patent

CA 2249228

A composite closure for a container has a moulded plastics band (24) closed at one end by a plastics closure disc (72) which is held captive within a recess (62) formed around the band interior. Also on the band interior is a screw thread (44) by which the closure may be attached to a container neck (12). The disc is cut from a flat plastics sheet and is initially plane. It is oversized in relation to the recess of the band, so that in the assembled closure it is held in an outwardly domed condition by inward compressive stresses exerted by the band. This domed configuration assists with the capping operation, when a marginal edge region (82) of the disc which lies radially outside the container neck is deformed downwardly to generally frustoconical form.

L'invention porte sur un bouchon de fermeture composite pour récipient comportant une ceinture de plastique moulé (24) fermée à l'une de ses extrémités par un disque plastique (72) emprisonné dans un évidement pratiqué dans l'intérieur de la ceinture. L'intérieur de la bande comporte également un filetage (44) servant à fixer le bouchon de fermeture au goulot (12) d'un récipient. Le disque, découpé dans une feuille de plastique plane est initialement plat. Il est surdimensionné par rapport au susdit évidement de manière à se trouver dans le bouchon de fermeture une fois assemblé, incurvé vers l'extérieur en raison des tensions centripètes exercées par la ceinture. Cette forme incurvée facilite l'encapsulage puisque la zone de bordure (82) du disque qui dépasse radialement du goulot, et se trouve déformée vers le bas, présente une forme sensiblement conique.

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