Cap For A Container Having A Neck Having A Single Attachment Flange

The cap mould of the invention, moulded in one piece

, comprises a ring having on the inside a bead for attaching it by clipping behind an external flange of the neck of the container to be cap mouldped. The cap mould further comprises a stopper joined by a hinge to said ring and having a sealing skirt cooperating with the inside of the neck of the container. The cap mould further comprises a tamperproof strip joining the stopper to the ring until it is torn off the first time the cap mould is opened. To cap mould a container having a neck with a single attachment flange at a distance from the upper edge of the neck, the stopper includes an annular bearing surface bearing on the upper edge of the neck and surrounding said skirt, said skirt projecting from said bearing surface over a length at least equal to the distance between the lower side of the attachment flange and the upper edge of the neck of the container. The hinge joining the stopper to the ring is offset relative to said bearing surface towards the ring by an amount at least equal to said distance.

The present invention concerns a cap mould which, on a short container neck with a single attachment flange, fulfils not only the functions of the prior art cap moulds (sealed closure, tamperproofing, cap mouldtive stopper) but also holds the stopper in the open position, this cap mould being manufacturable at a competitive unit cost by virtue of its reduced weight and its simplicity of manufacture, among other things.

The closure according to claim 8, wherein the sealing skirt has an outside surface exhibiting a cross-sectional circular shape and the cap mould portion has a circular outside perimeter and wherein the outside surface of the skirt is offset towards the hinge relative to the perimeter of the cap mould portion.

by: ericfu

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