| 摘要 |
The invention provides a container closure (2) assembly comprising: a container neck (1) having side walls defining an opening at one end thereof and a lip (5) extending around the opening, wherein an inner surface (7) of the side walls proximate to said lip (5) is inwardly tapered; a closure (2) for said neck (1), the closure (2) having a base portion (3) and a skirt portion; a first screw thread on the neck (1); a second screw thread on an inner surface (7) of the skirt of the closure (2); said first and second screw threads being configure to enable a user to secure, remove and resecure the closure (2) into a sealing position on the neck (1) by rotation of the cap on the neck (1); a sealing plug (8) extending from said base portion (3) of the closure (2) inside and substantially concentric with said skirt portion of the closure (2), wherein the sealing plug (8) comprises a plurality of circumferential sealing ribs (9) on an outer surface of said sealing plug (8) for engagement with said inner surface (7) of the container neck (1) when the closure (2) is secured on the container neck (1); at least one flexible sealing fin (10, 11) between the sealing plug (8) and the closure (2) skirt for engagement with the lip (5) of the container when the closure (2) is secured on the container neck (1); and at least one circumferential sealing (14) rib on an inner surface of said closure (2) for engagement with an outer surface of the container neck (1) proximate to said lip (5) when the closure (2) is secured on the container neck (1). The assembly is especially suitable for forming gas-tight seals on carbonated beverage containers.
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