Low weight container closure

Abstract

A container closure comprising a top wall portion and a skirt portion depending from the top wall portion is provided. The skirt portion can include corrugation on an interior and exterior thereof, and the corrugation can reduce the weight of the container closure and provide strength of the skirt portion.

1 . A container closure comprising:
 a top wall portion; and   an skirt portion depending from the top wall portion, the skirt portion including corrugation on an interior and an exterior thereof, the corrugation reducing a weight of the container closure and the corrugation providing strength to the skirt portion.   
   
   
       2 . A container closure as in  claim 1  wherein the corrugation includes alternating grooves and protrusions circumferentially spaced about the interior and the exterior of the skirt portion. 
   
   
       3 . A container closure as in  claim 2  wherein the grooves of the interior correspond with the protrusions of the exterior, and the protrusions of the interior correspond with the grooves of the exterior. 
   
   
       4 . A container closure as in  claim 2  wherein each groove extends from a top end of the skirt portion to a bottom end of the skirt portion. 
   
   
       5 . A container closure as in  claim 2  wherein each groove extends only a portion of the skirt portion. 
   
   
       6 . A container closure as in  claim 2  wherein each protrusion extends from a top end of the skirt portion to a bottom end of the skirt portion 
   
   
       7 . A container closure as in  claim 2  wherein each protrusion extends only a portion of the skirt portion. 
   
   
       8 . A container closure as in  claim 1  wherein the corrugation is integral with the skirt portion. 
   
   
       9 . A container closure as in  claim 1  wherein the corrugation is continuously situated about the interior and the exterior of the skirt portion. 
   
   
       10 . A container closure as in  claim 1  wherein the corrugation is partially situated about the interior or the exterior of the skirt portion. 
   
   
       11 . A container closure as in  claim 1  wherein the interior and the exterior of the skirt portion is corrugated. 
   
   
       12 . A container closure as in  claim 1  wherein the skirt portion depends from a peripheral edge of the top wall portion. 
   
   
       13 . A container closure as in  claim 1  wherein any portion of the skirt portion is short weighted. 
   
   
       14 . A container closure as in  claim 1  wherein a diameter of the container closure is from about 18 mm to about 10 feet. 
   
   
       15 . A container closure as in  claim 1  wherein the container closure is formed from plastic. 
   
   
       16 . A container closure as in  claim 1  wherein the skirt portion is one of annular, circular, rectangular, squared, triangular, polygonal, oval, or irregularly shaped. 
   
   
       17 . A container closure comprising:
 a top wall portion; and   a corrugation depending from the top wall portion, the corrugation having interior grooves that correspond to exterior protrusions, the corrugation having interior protrusions that correspond to exterior grooves, the interior grooves and protrusions and the exterior grooves and protrusions being circumferentially spaced about an interior of the corrugation and an exterior of the corrugation, respectively.   
   
   
       18 . A container closure as in  claim 17  wherein the interior grooves and protrusions and the exterior grooves and protrusions extend from a top end of the corrugation to a bottom end of the corrugation. 
   
   
       19 . A container closure as in  claim 17  wherein the interior grooves and protrusions and the exterior grooves and protrusions extend from a peripheral edge of the top wall portion to a bottom end of the corrugation. 
   
   
       20 . A container closure as in  claim 17  wherein the interior grooves and protrusions or the exterior grooves and protrusions extend only a portion of the corrugation. 
   
   
       21 . A container closure as in  claim 17  wherein the corrugation short weights the container closure. 
   
   
       22 . A container closure as in  claim 17  wherein the corrugation provides relative strength to the container closure. 
   
   
       23 . A container closure as in  claim 17  wherein a diameter of the container closure is from about 18 mm to about 10 feet. 
   
   
       24 . A container closure as in  claim 17  where the container closure is formed from plastic. 
   
   
       25 . A container closure as in  claim 17  wherein the container closure is child resistant. 
   
   
       26 . A container closure as in  claim 17  wherein the corrugation is one of annular, circular, rectangular, squared, triangular, polygonal, oval, or irregularly shaped.