Wave-type pressure compensating bases for polymeric containers
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United States of America Patent
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Nov 1, 2016
Grant Date -
Sep 26, 2013
app pub date -
May 17, 2013
filing date -
Feb 19, 2010
priority date (Note) -
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Abstract
A plastic container having a sidewall defining a chamber and having a first end and a second end and an opening at the first end into the chamber. A base of the container extends from the sidewall and closes the second end, the base having an outer perimeter portion defining a support structure, an axially inwardly extending perimeter wall spaced radially inwardly from the support structure forming an angle with a horizontal line of greater than about 80°, a centrally disposed pushup section in the shape of an axially inwardly extending truncated cone, and a toroidal-shaped channel circumscribing and connecting the perimeter wall to the pushup section. The toroidal-shaped channel has a surface that is asymmetrical about a central axis of the container when the container is under static pressure conditions.
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