Pressure-packing container with easy-to-open closure
AssigneeVilamonte Research & Development Co., Ltd.
InventorTatsuyoshi Murayama
Life of this patent
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Abstract
A pressure-packing container comprises an impervious container body having an internally recessed upper edge, and an easy-to-open closure cap composed of a rigid outer closure member having an annular rim, a resilient inner closure member joined with the underside of the outer closure member, and a sheet of impervious film bonded with the inner closure member. To close the container, an inner peripheral wall of the rim is plastically deformed to force a portion of the inner closure member to flex into a groove in the upper edge, with an outer edge of the impervious film sheet sandwiched between the deformed inner closure member and the grooved upper edge, thereby providing a hermetic seal strong enough to withstand the inside pressure of the container.
Claims16
A pressure-packing container comprising:
- (a) a container body having an opening and a recessed inner peripheral portion disposed adjacent to said opening;
- and
- (b) a closure cap adapted to be attached to said container body for closing said opening, said closure cap including
- (i) a rigid outer closure member having an upwardly projecting rim defining a downwardly open annular groove for receiving a peripheral edge of said container body defining said opening, and
- (ii) a resilient inner closure member joined with the underside of said outer closure member and extending at least along an inner peripheral wall of said rim, said inner closure member having an impervious surface layer sealingly engageable with said peripheral edge of said container body, said inner peripheral wall of said rim being plastically deformable radially outwardly to urge said inner closure member to resiliently flex into said recessed inner portion of said container body, thereby providing a hermetic seal between said container body and said closure cap.
Dependencies are inferred from the claim text.