Container closure device
AssigneeThe Continental Group, Inc.
InventorJohn Walter
Life of this patent
Estimating the term…
Abstract
A novel connection for a thermoplastic neck to a stub neck portion of a container, comprising a curl on the stub neck portion and a complimentary groove on the neck which cooperate to permit a portion of the neck below the curl to expand when a plug of the closure cap, which is threaded onto the neck, is inserted into the neck. The neck and neck portion have interlocking projections to prevent the neck from turning and the neck and cap having a novel thread arrangement which insures that the plug will properly enter into the neck and provide a good seal which could be frustrated if the neck was permitted to turn.
Claims7
A cap and neck assembly of thermoplastic material, the neck of said assembly comprising a pair of interdigitated spiral threads having leading ends terminating in a common location on the periphery of said neck and offset upwardly from the remaining threads and a cap having a pair of threads arranged to engage respective threads on said neck, said threads on said cap having leading end portions offset circumferentially from each other.
A closure for a high pressurized container having a plastic neck member comprising a bore with a downwardly tapered frusto-conical lower end portion, a cap having a top wall and a tapered plug depending therefrom adapted to fit loosely in the bore and wedge tightly into said tapered lower end portion in sealing position therewith, said cap having a skirt, and said skirt and neck member having a pair of threads on each thereof meshing with the complimentary pair of threads on the other thereof, and said threads being arranged to allow screwing off of the cap sufficiently to withdraw the plug from sealing position to to allow escape of pressurized gases before the cap can be unscrewed sufficiently to cause it to blow off.
Dependencies are inferred from the claim text.