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AssigneeClosures and Packaging Services Limited
InventorsRodney Malcolm Druitt, Michael Patrick Furlong
Estimating the term…
A closure (10) having a scaling rib (14) projecting downwardly from the underside of its top portion (11). The first portion (15) of the scaling rib (14) increases in thickness as it extends away from the top portion (11). In another aspect, the invention relates to a closure (10) in which the sealing rib (14) has a third portion (18) that is substantially no thicker than the second portion (17) of the rib (14) and has a length longer, and preferably substantially longer, than its thickness. In the second aspect, the third portion (18) of the rib (14) is connected to the second portion (17) at or adjacent its free edge and extends generally in a direction away from the top portion (11). Upon attachment of the closure (10) with the neck (22) of a container, the third portion (18) will be displaced to lie between the end portion (23) of the neck (22) of the container and the top portion (11) of the closure (10).
A closure suitable for attachment to a container having an opening defined by an end portion of the container, the closure being moulded from a synthetic plastics material and including a top portion and a skirt portion depending from the top portion, 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 having an inner surface, which inner surface lies radially inwardly of the skirt portion, and 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 extending radially inwardly to terminate in a circular edge, the first portion having an internal diameter relative to the external diameter of the end portion of the container such that during attachment of the closure with the end portion of the container, the second frusto-conical portion of the sealing rib will be engaged by a free end of said end portion of the container and folded back at least adjacent the inner surface of the first portion of the rib, the closure being characterised in that the first portion of the rib increases in thickness as it extends away from the top portion of the closure.
The closure of any one of the preceding claims wherein the first portion of the rib is formed radially inwardly of the skirt portion with an annular space therebetween.
The closure of any one of the preceding claims wherein the first portion serves to form an abutment towards which the second portion is folded during attachment of the closure with the neck of a container.
The closure of any one of the preceding claims wherein during attachment of the closure with the neck of the container, the second portion is folded back against the first portion so that it bears against the inner surface of the first portion.
The closure of any one of the preceding claims wherein the thickness of the first portion increases at a uniform rate along the length of the first portion away from the underside of the top portion.
The closure of any one of the preceding claims wherein the closure is made from polyethylene.
The closure of any one of the preceding claims wherein the closure is formed in one piece.
The closure of any one of the preceding claims wherein the closure has a tamper evident band adapted to provide an indication of removal or attempted removal of the closure from a container.
The closure of any one of the preceding claims wherein the sealing rib includes a substantially annular region of weakness formed around all inside surface of the sealing rib approximately at the join between the first and second portions of the sealing rib.
The closure of any one of the preceding claims wherein there is formed on the upper surface of the second portion of the sealing rib and proximate its free edge, engagement means so arranged that during attachment of the closure with the end portion of the container, the eligagement means engages with the underside of the top portion.
The closure of any one of the preceding claims wherein the underside of the top portion of the closure is provided with a segmented annular ridge positioned inwardly and adjacent the first portion of the sealing rib.
A closure suitable for mounting onto a container having all opening defined by all end portion of the container, the closure being moulded from a synthetic plastics material and including a top portion and a skirt portion depending from the top portion, all 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 having an inner surface, which inner surface lies radially inwardly of the skirt portion, and a second, frusto-conlical, portion contiguous with the first portion and separated from the top portion by the inner surface of the first portion, the second portion extending radially inwardly to terminate in a circular edge, the closure being characterised in that the sealing rib has a third portion connected to the second portion at or adjacent the circular edge and extending generally in a direction away from the top portion, the third portion being substantially no thicker than the second portion and having a length longer than its thickness, the first portion having an internal diameter relative to the external diameter of the end portion of the container such that during attachment of the closure with the end portion of the container, the second frusto-conical portion of the sealing rib will be engaged by a free end of said end portion of the container and folded back at least adjacent the inner surface of the first portion of the rib, and with the third portion of the rib positioned between the neck of the container and the top portion of the closure.
The closure of ally one of claims 95-36 wherein the closure is made from polyethylene.
Dependencies are inferred from the claim text.