Base configuration for biaxial stretched blow molded pet contain

Details Base configuration for biaxial stretched blow molded pet contain Base configuration for biaxial stretched blow molded pet contain

1993-12-03

1995-09-26

Weaver, Sue A.

Bottles and jars

Miscellaneous

220606, 220608, 220609, B65D 102, B65D 142, B65D 2300

Patent

active

054528151

ABSTRACT:
A base configuration for use with biaxially stretched blow molded PET containers is provided. In particular, the base includes a concave spherical portion disposed at a central position on the base. A first protruding circular member is formed around the circumference of the concave spherical portion. An annular groove is disposed around the first protruding circular member. A second protruding circular member is formed around the circumference of the annular groove. Five legs extend radially outward from the second protruding circular member. The outer surface of each leg subtends an angle of 72 degrees, and a curved rib is formed between every pair of legs, the ribs having an umbrella bone structure and each of the ribs subtending an angle of 0 degree, whereby the base of the container has an increased internal pressure resistance and thus prevents cracking in the base.

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