Tip design for reducing capillary leakage and water loss for plastic container closures

Abstract

A plastic container closure includes a bottle having an open end with a circumferential bottle shoulder and a tip insertable into the bottle opened end with a tip shoulder overlaying the bottle shoulder. The compressible seal ring is provided and disposed between the bottle shoulder and the tip shoulder and a tip-covering cap engagable with the bottle and the cap compressed to the seal.

1 . A plastic container closure comprising: 
 a bottle having an open end with a circumferential bottle shoulder;    a tip insertable into the bottle open end and having a tip shoulder overlaying the bottle shoulder;    a compressible seal ring disposed between the bottle shoulder and said tip shoulder; and    a tip-covering cap engagable with said bottle and compressing the seal.    
   
   
       2 . The closure according to  claim 1  wherein the cap and bottle include engagable threads.  
   
   
       3 . The closure according to  claim 2  wherein the seal ring is disposed on said tip shoulder.  
   
   
       4 . The closure according to  claim 3  wherein said bottle further comprises an internal bottle seal ring engaging said tip.  
   
   
       5 . The closure according to  claim 4  wherein the seal ring has a triangular cross section.  
   
   
       6 . The container closure according to  claim 2  further comprises means for enabling repeated threaded engagement between the cap and bottle to provide efficient compression of the seal to prevent leakage therepast.  
   
   
       7 . The container closure according to  claim 6  wherein the means for enabling repeated threaded engagement between the cap and bottle to provide sufficient compression of the seal comprises a triangular shape of the seal ring.  
   
   
       8 . A container closure comprising: 
 a bottle having an open end with a circumferential bottle shoulder;    a tip insertable into the bottle open end and having a tip shoulder overlaying the bottle shoulder;    a capillary leakage preventing gasket disposed between the bottle shoulder and said tip shoulder; and    a tip-covering cap engagable with said bottle and compressing the gasket.    
   
   
       9 . The container closure according to  claim 8  wherein the cap and bottle include engagable threads.  
   
   
       10 . The container closure according to  claim 9  wherein the gasket is fixed to said tip shoulder.  
   
   
       11 . The container closure according to  claim 10  wherein said bottle further comprises an internal bottle seal ring engaging said tip.  
   
   
       12 . The container closure according to  claim 11  wherein the gasket has a triangular cross section.  
   
   
       13 . The container closure according to  claim 9  further comprises means for enabling repeated threaded engagement between the cap and bottle to provide sufficient compression of the gasket to prevent coaxially leaking therepast.  
   
   
       14 . The container closure according to  claim 13  wherein the means for enabling repeated threaded engagement between the cap and bottle to provide sufficient compression of the gasket comprises a triangular shape of the gasket.  
   
   
       15 . A method for preventing capillary leakage past a seal between a plastic bottle open end and a plastic bottle tip due to plastic molding imperfection, said method comprising: 
 disposing a seal between a circumferential bottle shoulder and an overlay tip to shoulder; and    compressing the seal by attaching a cap to the bottle.