Improvements in roller ball applicators

Abstract

Several improvements on roller ball applicators on glass bottles have been described. A unique mechanical design of the roller ball housing to obtain minimal leak of the bottle ingredients is described. Also described is a hidden tamper evident band.

We claim: 
     
         1 . A two-piece leak-minimizing roller ball housing comprising a ball receptacle part having one dispensing end to house a roller ball and a distal end that fits into a bottle typically containing the liquid to be dispensed, and a ball retainer piece fitted onto the dispensing end of the ball receptacle part with a roller ball enclosed in the cavity formed by the ball receptacle and the ball retainer. 
     
     
         2 . The roller ball housing of  claim 1  wherein the ball receptacle is made from Polyethylene and the ball retainer is made from Polypropylene. 
     
     
         3 . The two-piece roller ball housing of  claim 1  wherein the leak is measured to be less than 0.01 gm with the leak testing protocol. 
     
     
         4 . A roll-on applicator using the two-piece leak minimizing ball housing of  claim 1 . 
     
     
         5 . A roll-on applicator cap assembly with a tamper evident band. 
     
     
         6 . The roll-on applicator cap assembly of  claim 5  wherein the tamper evident band remains hidden when the bottle cap assembly is screwed close on its bottle. 
     
     
         7 . The cap assembly of  claim 6  comprising an inner cap and an outer cap, wherein the inner cap has a tear away tamper evidence band.