Vertical displacement container base

Abstract

A container including an opening defined by a finish portion. A base is at an end of the container opposite to the opening. The base includes a deep base ring between a standing surface and a truncated cone at a center of the base. The truncated cone is mechanically movable a displacement distance from an as-blown position to a displaced position subsequent to hot-filling and capping of the container to reduce an internal volume of the container. In the displaced position, the truncated cone is closer to the opening than in the as-blown position.

What is claimed is: 
     
         1 . A container comprising:
 an opening defined by a finish portion; and   a base at an end of the container opposite to the opening having a maximum diameter, the base including a deep base ring between a standing surface and a truncated cone at a center of the base, the truncated cone is mechanically movable a displacement distance from an as-blown position to a displaced position subsequent to hot-filling and capping of the container to reduce an internal volume of the container, in the displaced position the truncated cone is closer to the opening than in the as-blown position;   wherein:
 the container is made of a polymeric material having an average material thickness of 0.011″ or less; and 
 a ratio of the maximum diameter of the truncated cone to the displacement distance is less than 2:1. 
   
     
     
         2 . The container of  claim 1 , wherein the truncated cone has a maximum diameter that is not more than twice the displacement distance. 
     
     
         3 . The container of  claim 1 , wherein the maximum diameter of the truncated cone is about equal to the displacement distance. 
     
     
         4 . The container of  claim 1 , wherein a sidewall of the deep base ring is angled 91°-130° from a plane extending parallel to the standing surface. 
     
     
         5 . The container of  claim 4 , wherein the standing surface extends perpendicular to a longitudinal axis of the container. 
     
     
         6 . The container of  claim 1 , wherein the deep base ring includes an inner sidewall and an outer sidewall, in the as-blown position the inner sidewall and the outer sidewall are arranged relative to each other at an angle of 16° to 43°. 
     
     
         7 . The container of  claim 1 , wherein the deep base ring includes an inner sidewall and an outer sidewall, in the displaced position the inner sidewall and the outer sidewall are arranged relative to each other at an angle of 143° to 184°. 
     
     
         8 . The container of  claim 1 , wherein the deep base ring includes an inner sidewall and an outer sidewall, in the as-blown position the inner sidewall and the outer sidewall are arranged relative to each other at an average angle of 25°. 
     
     
         9 . The container of  claim 8 , wherein the deep base ring includes an inner sidewall and an outer sidewall, in the displaced position the inner sidewall and the outer sidewall are arranged relative to each other at an average angle of 163°. 
     
     
         10 . The container of  claim 1 , wherein the deep base ring includes an inner sidewall and an outer sidewall, in the displaced position the inner sidewall and the outer sidewall are arranged at an obtuse angle that is 3.3-11.5 times greater than an acute angle at which the inner sidewall and the outer sidewall are arranged in the as-blown position. 
     
     
         11 . The container of  claim 1 , wherein the deep base ring includes an inner sidewall and an outer sidewall, in the displaced position the inner sidewall and the outer sidewall are arranged at an obtuse angle that is 6.5 times greater than an acute angle at which the inner sidewall and the outer sidewall are arranged in the as-blown position. 
     
     
         12 . The container of  claim 1 , wherein the container has an overall diameter that is about two to four times greater than a maximum diameter of the cone. 
     
     
         13 . The container of  claim 1 , wherein the container has an overall diameter that is about three times greater than a maximum diameter of the cone. 
     
     
         14 . The container of  claim 1 , wherein the container has an overall diameter that is about three times greater than the displacement distance. 
     
     
         15 . The container of  claim 1 , the polymeric material has an intrinsic viscosity of 0.68-0.78 deciliters per gram (dL/g).