Plastic container package with linerless sealing closure system

B - Operations – Transporting – 65 – D

Patent

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Details

B65D 53/00 (2006.01) B65D 41/04 (2006.01)

Patent

CA 2094489

A plastic container closure package with a linerless sealing closure system comprising a plastic container having a threaded finish for receiving a closure having a base wall and an internal skirt with complementary threads on the skirt. The plastic container is made by a process wherein a tube of molten plastic is inflated and blown to form the container and thereafter the tube is trimmed to form the sealing surface of the finish of the container. The closure includes an annular flange that extends downwardly from the underside of the base wall of the closure and radially inwardly of the closure for engagement with the container. The annular flange includes a smooth continuous frustoconical surface that faces the finish of the container and engages the inner edge at the juncture of the top surface and inside surface of the finish of the container. An annular stop extends axially from the underside of the base wall of the closure to limit the flexing of the annular flange. The width of the flange is such that the free end thereof normally extends beyond the inner edge of the finish into sealing this engagement intermediate the free edge and the end of the flange.

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