Patent ID: 9481485
Filing Date: 2016-11-01
CPC Classification: B29B,B29C,B29K,B29L,B65D

Claim Text:
1. A plastic container comprising: a vertical 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 extending from the sidewall and closing 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 inwardly-directed angle with a horizontal line perpendicular to the sidewall 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, wherein a thickness of the base is thinner than a thickness of the sidewall, the toroidal-shaped channel having a surface that is asymmetrical about a central axis of the container when the container is under static pressure conditions so that one portion of the toroidal shaped channel yields under a first pressure and a second portion of the toroidal shaped channel yields under a second pressure different from the first pressure, wherein the toroidal-shaped channel includes a first transition panel and a second transition panel and the second transitional panel has an axially deeper shape than the first transition panel under static conditions.