Resin made container

Abstract

A resin made container includes a spout portion to/from which a cap can be attached/detached, a shoulder portion continuous with the spout portion, a body portion continuous with the shoulder portion and a bottom portion continuous with the body portion and disposed at a lowermost portion of the bottle. At a lateral wall lower end of the bottom portion, there is formed a step which is receded to the inner side along a circumferential direction.

1 . A resin made container including a spout portion to/from which a cap can be attached/detached, a shoulder portion continuous with the spout portion, a body portion continuous with the shoulder portion and a bottom portion continuous with the body portion and disposed at a lowermost portion of the bottle;
 wherein at a lateral wall lower end of the bottom portion, there is formed a step which is receded to the inner side along a circumferential direction.   
     
     
         2 . The resin made container of  claim 1 , wherein the step has a vertical cross sectional shape which is formed of a first curved portion which protrudes to the outer side of the container, a second curved portion which protrudes to the inner side of the container, and a third curved portion which protrudes to the outer side of the container, the first through third curved portions being formed continuous in this order from the upper side. 
     
     
         3 . The resin made container of  claim 2 , wherein the second curved portion has a curvature radius smaller than a curvature radius of the first curved portion. 
     
     
         4 . The resin made container of  claim 2 , wherein the curvature radii respectively of the first curved portion, the second curved portion and the third curved portion are all smaller than or equal to 5 mm. 
     
     
         5 . The resin made container of  claim 1 , wherein the step has a height smaller than or equal to 4 mm. 
     
     
         6 . The resin made container of  claim 1 , wherein a diameter decrease ratio of a maximum outer diameter of a bottom face of the bottom portion relative to a maximum outer diameter of the lateral wall of the bottom portion ranges from 60% to 90%. 
     
     
         7 . The resin made container of  claim 6 , wherein a bottom wall of the bottle portion has a receded portion which is receded to the inner side of the container.