Anti-rotation can opening

Abstract

Metal cans having openings formed therein with plastic fitments inserted therein provide a pouring spout for convenient dispensing of the contents of the metal cans. Many classes of chemicals are shipped in such cans. These chemicals can cause the plastic fitment to swell and soften. This swelling causes interference with the screw cap and increases the torque necessary to remove the cap and dispense the contents. At the same time, the softening of the fitment by the chemical shipped in this package causes a decrease in the spin resistance of the fitment in the formed opening of the can. A can, therefore, is provided that comprises a top wall, an opening in the top wall, a substantially cylindrical surface located on the top wall and surrounding the opening, the cylindrical surface includes an outer portion and an inner portion, and a non-rotational surface positioned on the inner portion, the non-rotational surface resists rotation of a fitment positioned in the opening.

1 . A can comprising: 
 a top wall;    an opening in said top wall;    a substantially cylindrical surface located on said top wall and surrounding said opening, said cylindrical surface includes an outer portion and an inner portion; and    a non-rotational surface positioned on said inner portion, said non-rotational surface resists rotation of a fitment positioned in said opening.    
   
   
       2 . The can of  claim 1 , wherein said non-rotational surface comprises at least one substantially vertical component that resists rotation of said fitment.  
   
   
       3 . The can of  claim 2 , further comprising a plurality of vertical components located on said inner portion of said cylindrical surface, each said vertical component having at least one edge that resists rotation of said fitment.  
   
   
       4 . The can of  claim 2 , further comprising a fitment positioned in said opening, wherein said vertical component resists rotation of said fitment.  
   
   
       5 . The can of  claim 4 , wherein said vertical component resists clockwise rotation of said fitment.  
   
   
       6 . The can of  claim 4 , wherein said vertical component resists counter-clockwise rotation of said fitment.  
   
   
       7 . The can of  claim 4 , wherein said vertical components resist clockwise and counter-clockwise rotation of said fitment.  
   
   
       8 . The can of  claim 2 , wherein said opening is non-circular.  
   
   
       9 . The can of  claim 8 , wherein said vertical component is non-linear.  
   
   
       10 . A can comprising: 
 a top wall;    a substantially cylindrical surface located on said top wall, said cylindrical surface having an inner portion and an outer portion;    a sealing surface located on said outer portion of said cylindrical surface; and    at least one substantially vertical component located on said inner portion of said cylindrical surface wherein said substantially vertical component resists rotation of a fitment positioned in said can.    
   
   
       11 . The can of  claim 10 , further comprising a non-circular opening located in said top wall wherein said cylindrical surface surrounds said opening.  
   
   
       12 . The can of  claim 11 , further comprising a fitment positioned in said opening, wherein said vertical component resists rotation of said fitment.  
   
   
       13 . The can of  claim 12 , further comprising a plurality of substantially vertical components that resist rotation of said fitment in said opening.  
   
   
       14 . The can of  claim 12 , wherein said substantially vertical component resists at least one of clockwise rotation and counter-clockwise rotation.  
   
   
       15 . A method of manufacturing a can comprising: 
 providing a top wall;    forming an opening in said top wall;    forming a cylindrical sealing surface surrounding said opening;    forming a non-rotational surface adjacent said opening; and    installing a fitment in said opening, wherein said non-rotational surface resists rotation of said fitment.    
   
   
       16 . The method of  claim 15 , wherein said non-rotational surface comprises at least one vertical component.  
   
   
       17 . The method of  claim 16 , wherein said vertical component resists at least one of clockwise rotation and counter-clockwise rotation of said fitment.  
   
   
       18 . The method of  claim 17 , wherein said can is made of metal having a predetermined hardness.  
   
   
       19 . The method of  claim 18 , wherein said fitment is a made of a material that is less hard than said predetermined hardness of said can.  
   
   
       20 . A can comprising: 
 a top wall;    a non-circular opening in said top wall;    a substantially cylindrical surface located on said top wall and surrounding said opening, said cylindrical surface includes an outer portion and an inner portion;    a plastic fitment positioned in said opening; and    at least one substantially vertical component that resists clockwise and counter-clockwise rotation of said fitment in said opening.    
   
   
       21 . The can of  claim 20 , wherein said vertical component is curved.