Patent ID: 8444002
Filing Date: 2013-05-21
Classification: B29B,B29C,B29K,B29L,B65D

Abstract:
1. A plastic container comprising: a sidewall defining a chamber and having a first and 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 angle with a horizontal line of less than about 90°, and a pressure compensating panel closing an end of the perimeter wall, the pressure compensating panel being moveable along an axis of the container from a first position where a central portion of the panel is below a top portion of the perimeter wall to a second position where the central portion is above the top portion of the perimeter wall to change the volume of the container; and a plurality of circumferentially spaced radial grooves on the panel, the grooves comprised of thinned lines in the panel, creating hinges extending through a partial thickness of the panel with no interruption in the surface of the panel on an opposite surface of the grooves, and adding flexibility to the panel.