Patent ID: 6772894
Filing Date: 2004-08-10
Classification: B65D,Y10S

Abstract:
A closure suitable for mounting onto a container, the container having an opening defined by an end portion of the container, said end portion having a free end and an outer surface, the closure including:a top portion; a skirt portion depending from the top portion; and an annular sealing rib projecting downwardly from an underside of the top portion, the rib including: a first portion which is contiguous with the top portion and has an inner surface, which inner surface lies radially inwardly of the skirt portion; and at least a second, frusto-conical, portion contiguous with the first portion and separated from the top portion by the inner surface of the first portion, the second portion having an upperside and an underside and extending radially inwardly to a circular edge, the underside of the second portion having an annular protrusion formed thereon at a location spaced outwardly from the circular edge and extending downwardly away from the top portion of the closure; wherein the inner surface of the first portion has an internal diameter relative to the external diameter of the end portion of the container to which the closure is to be attached such that during attachment of the closure with the end portion of the container, the sealing rib will be engaged by said end portion of the container so folding the second portion at least towards the inner surface of the first portion of the rib to form a seal between at least the outer surface of the end portion of the container and at least a part of the second portion of the sealing rib between the free end thereof and the annular protrusion; and further wherein the spacing of the annular protrusion formed on the underside of the second portion from the circular edge thereof is such that during said attachment, the protrusion engages the outer surface at a position spaced from the container free end and the free end of the second portion engages the container free end.