Plastic container with a generally hemispherical bottom wall hav

Details Plastic container with a generally hemispherical bottom wall hav Plastic container with a generally hemispherical bottom wall hav

1979-10-25

1981-02-10

Norton, Donald F.

Bottles and jars

Ejecting

Siphon type

220 70, B65D 102

Patent

active

042496675

ABSTRACT:
This disclosure relates to improvements in the cross section of a bottom end of a plastic bottle suitable for packaging liquids under internal pressures. The bottom end is primarily one which includes a generally hemispherical bottom wall having projecting therefrom in circumferentially spaced relation hollow legs terminating in supporting feet. The bottom end is stiffened against creep of the plastic material over a period of time under the influence of the internal pressure by changing the configuration of the bottom wall from that of a hemisphere to one which includes a configuration of straight line sections and curved line sections when viewed in radial cross section along the axis of the bottle.

REFERENCES:
patent: 3598270 (1971-08-01), Adomaitis
patent: 3727783 (1973-04-01), Carmichael
patent: 3871541 (1975-03-01), Adomaitis

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