Closure with threading

Abstract

A closure includes first and second closure portions. The first closure portion includes a top wall portion and an annular skirt portion. The annular skirt portion depends from the top wall portion. The skirt portion includes an internal thread formation for mating engagement with an external thread formation of a container. The thread formation is a helical formation with alternating bumps and valleys. Each of the bumps has a greater width than the valleys. The width of the bumps and the valleys are measured in a direction perpendicular to the top wall portion. The second closure portion includes a tamper-evident band depending from and being partially detachably connected to the skirt portion by a frangible connection.

What is claimed is: 
     
         1 . A closure comprising:
 a first closure portion including:
 a top wall portion; 
 an annular skirt portion depending from the top wall portion, the annular skirt portion including an internal thread formation for mating engagement with an external thread formation of a container, the thread formation being a helical formation with a plurality of alternating bumps and valleys, each of the plurality of bumps having a greater width than the plurality of valleys, the width of the plurality of bumps and the plurality of valleys being measured in a direction perpendicular to the top wall portion; and 
   a second closure portion including:
 a tamper-evident band depending from and being partially detachably connected to the annular skirt portion by a frangible connection. 
   
     
     
         2 . The closure of  claim 1 , wherein the closure is a one-piece. 
     
     
         3 . The closure of  claim 1 , wherein the width of the plurality of bumps is from about 0.03 to about 0.11 inch and wherein the width of the plurality of valleys is from about 0.01 to about 0.05 inch. 
     
     
         4 . The closure of  claim 3 , wherein the width of the plurality of bumps is from about 0.05 to about 0.11 inch and wherein the width of the plurality of valleys is from about 0.02 to about 0.04 inch. 
     
     
         5 . The closure of  claim 1 , wherein the width of the plurality of bumps is from about 1.5 to about 4 times greater than the width of the plurality of valleys. 
     
     
         6 . The closure of  claim 5 , wherein the width of the plurality of bumps is from about 2 to about 4 times greater than the width of the plurality of valleys. 
     
     
         7 . The closure of  claim 6 , wherein the width of the plurality of bumps is from about 2 to about 3 times greater than the width of the plurality of valleys. 
     
     
         8 . The closure of  claim 6 , wherein the width of the plurality of bumps is from about 3 to about 4 times greater than the width of the plurality of valleys. 
     
     
         9 . A closure comprising:
 a first closure portion including:
 a top wall portion; 
 an annular skirt portion depending from the top wall portion, the annular skirt portion including an internal thread formation for mating engagement with an external thread formation of a container, the thread formation being a helical formation that is discontinuous and forms a plurality of individual segments, each of the individual segments including a plurality of alternating bumps and valleys, each of the plurality of bumps having a greater width than the plurality of valleys, the width of the plurality of bumps and the plurality of valleys being measured in a direction perpendicular to the top wall portion; and 
   a second closure portion including:
 a tamper-evident band depending from and being partially detachably connected to the annular skirt portion by a frangible connection. 
   
     
     
         10 . The closure of  claim 9 , wherein each of the individual segments includes at least three bumps. 
     
     
         11 . The closure of  claim 9 , wherein the width of the plurality of bumps is from about 0.03 to about 0.11 inch and wherein the width of the plurality of valleys is from about 0.01 to about 0.05 inch. 
     
     
         12 . The closure of  claim 11 , wherein the width of the plurality of bumps is from about 0.05 to about 0.11 inch and wherein the width of the plurality of valleys is from about 0.02 to about 0.04 inch. 
     
     
         13 . The closure of  claim 9 , wherein the width of the plurality of bumps is from about 1.5 to about 4 times greater than the width of the plurality of valleys. 
     
     
         14 . The closure of  claim 13 , wherein the width of the plurality of bumps is from about 2 to about 4 times greater than the width of the plurality of valleys. 
     
     
         15 . The closure of  claim 13 , wherein the width of the plurality of bumps is from about 3 to about 4 times greater than the width of the plurality of valleys. 
     
     
         16 . A package comprising:
 a container having a neck portion defining an opening, the container having an external thread formation on the neck portion; and   a closure being configured for fitment to the neck portion of the container for closing the opening, the closure including a first closure portion and a second closure portion, the first closure portion including a top wall portion and an annular skirt portion, the annular skirt portion depending from the top wall portion, the annular skirt portion including an internal thread formation for mating engagement with an external thread formation of a container, the thread formation being a helical formation with a plurality of alternating bumps and valleys, each of the plurality of bumps having a greater width than the plurality of valleys, the width of the plurality of bumps and the plurality of valleys being measured in a direction perpendicular to the top wall portion, the second closure portion including a tamper-evident band depending from and being partially detachably connected to the annular skirt portion by a frangible connection.   
     
     
         17 . The package of  claim 16 , wherein the thread formation is discontinuous and forms a plurality of individual segments, each of the individual segments including the plurality of alternating bumps and valleys. 
     
     
         18 . The package of  claim 16 , wherein the width of the plurality of bumps is from about 1.5 to about 4 times greater than the width of the plurality of valleys. 
     
     
         19 . The package of  claim 18 , wherein the width of the plurality of bumps is from about 2 to about 3 times greater than the width of the plurality of valleys. 
     
     
         20 . The package of  claim 18 , wherein the width of the plurality of bumps is from about 3 to about 4 times greater than the width of the plurality of valleys.