B - Operations – Transporting – 65 – D
Patent
B - Operations, Transporting
65
D
206/40
B65D 41/04 (2006.01)
Patent
CA 1117478
Case EPC-4509 Canada CLOSURE CAP Abstract of the Invention A package for containing a product, e. g., carbonated beverages, capable of producing internal pressure is disclosed. The package features a cap having an annular top was and an annular sidewall downwardly depending from the top wall and having on its inside surface an inwardly projecting helical thread for cooperation with the threaded neck of the container. An annular interior wall depends downwardly from the top wall and is displaced radially inward from the sidewall to provide an annular space into which the upper portion of the container neck can nest. On nesting, the container neck forms, with the inside surface of the top wall or the outside surface of the interior wall, at least one seal. A concave wall is also provided and is attached at its circumference to the lower end of the interior wall. The concave wall is flexible for upward flexing in response to the internal pressure whereby the interior wall is pressed outwardly to form a second seal against the inside surface of the container neck when the flexing occurs. The latter seal increases in fidelity in response to the in- crease in internal container pressure.
335781
Ethyl Products Company
Macrae & Co.
LandOfFree
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