Linerless closure for carbonated beverage container

B - Operations – Transporting – 65 – D

Patent

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B65D 41/04 (2006.01) B65D 51/16 (2006.01) B65D 53/02 (2006.01)

Patent

CA 1322187

ABSTRACT A closure for a container having an externally screw threaded neck, said closure being moulded in one piece from a resilient plastics material and comprising a top and a depending skirt which has on its internal surface a complementary screw thread, characterised in that an annular sealing rib projects downwardly from the top, the rib includes a first substantially cylindrical portion contiguous with the top and lying adjacent to or abutting with the skirt and a second, frusto-conical, portion contiguous with the end of the first portion distal to the top and extending radially inwardly to terminate in a circular free edge, the internal diameter of the first portion being equal to or only slightly larger than the external diameter of the neck of the container to which the closure is to be attached such that, during threaded engagement of the closure with the neck, the second, frusto-conical, portion will he engaged by a free end of the neck and folded back against the first, substantially cylindrical portion of the rib and to form a gas-tight seal between the neck of the container and the closure.

603134

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