Non-paneling container

Details Non-paneling container Non-paneling container

1981-05-26

1983-04-26

Pollard, Steven M.

Bottles and jars

Ejecting

Siphon type

220 66, 220 70, 220415, B65D 2300

Patent

active

043810616

ABSTRACT:
This invention relates to a plastic or thermoplastic container designed to exhibit non-paneling of its sidewall due to reduction in pressure within the container. The container itself is provided with a yieldable bottom endwall especially constructed to compensate against the effects of reduced internal pressures often experienced after sealing hot fluids and the like. The thermoplastic container herein described is capable of being filled and sealed without paneling or deformation of its sidewall, said bottom endwall being displaceable inwardly, in preference to the sidewall, upon a relative reduction of pressure in the container, said bottom endwall comprising an outer frustoconical surface extending downwardly and inwardly from said sidewall toward the longitudinal axis of the container at an angle between about 5.degree. and 30.degree., a curvilinear base integrally connected with and extending downwardly from said outer frustoconical surface and providing a base for said container while resting on a supporting surface, said base being defined by an outer curved portion having a major radius of curvature and an inner curved portion having a minor radius of curvature, the centers of said radii falling on a common line parallel to the longitudinal axis of the container and the radii intersecting one another tangentially, the ratio of said major to minor radii being in the range of about 2:1.

REFERENCES:
patent: D248916 (1978-08-01), Reynolds et al.
patent: 2971671 (1961-02-01), Shakman
patent: 2982440 (1961-05-01), Harrison
patent: 3409167 (1968-11-01), Blanchard
patent: 3870181 (1975-03-01), Sincock
patent: 4099475 (1978-11-01), Lee, Jr.
patent: 4120419 (1978-10-01), Saunders
patent: 4151927 (1979-05-01), Cvacho et al.
patent: 4294373 (1981-10-01), Miller et al.

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