Freestanding container with improved combination of properties

Details Freestanding container with improved combination of properties Freestanding container with improved combination of properties

1993-03-26

1995-06-27

Shoap, Allan N.

Bottles and jars

Miscellaneous

220606, 220608, 220609, 220633, 264523, B65D 2300

Patent

active

054272580

ABSTRACT:
A freestanding container base having an improved combination of properties in regard to creep resistance, stress crack resistance, impact strength, weight, standing stability and formability. The container base has a substantially hemispherical bottom wall which includes four radiating ribs, and four legs extending downwardly from the bottom wall between the ribs and each of which terminates in a foot. Each rib has a rib wall forming part of the substantially hemispherical bottom wall and having an angular extent of from about 15.degree. to about 30.degree. for enhanced strength, with the leg occupying the remaining 75.degree. to 60.degree. angular extent for enhanced formability. The outer edge and angular extent of the foot are predetermined for enhanced stability and ease of formability. Preferably, the creep resistance is further enhanced by straightening the upper rib portion or providing an enlarged-diameter truncated bottom wall. The base is particularly suited for a blown PET carbonated beverage bottle.

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Research Disclosure, Mar. 1986.

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