Tooth whitener applicator and method

Abstract

An apparatus for practicing the inventive method includes a glass ampule having a tooth whitening solution vacuum sealed within a chamber of the ampule. The ampule is contained within a cylindrical plastic sleeve closed at one end and enclosed at its other open end by the proximal termination of a brush-type applicator. An adhesive such as glue is used to adhere the periphery of the brush to the inner surfaces of the plastic cylinder. The bristles preferably have circular cross-sections so that when they are tightly packed together and adhered to the plastic cylinder, interstices between adjacent bristles are sufficiently large enough to permit flow through of the tooth whitening composition while being sufficiently small enough to prevent shards of glass from the ampule, when broken open, to pass through the brush. A cardboard sleeve surrounds the plastic cylinder to protect the user from the glass ampule when broken. The method of using the inventive apparatus is also disclosed.

1 - 19 . (canceled)  
   
   
       20 . A method of applying a liquid including the steps of: 
 a) providing a single-dose applicator including: 
 i) an ampule containing a liquid composition vacuum packed therein;  
 ii) a flexible sleeve with a closed end and an open end defining an opening, said sleeve defining an internal chamber receiving said ampule, said sleeve having a substantially uniform cross-section throughout a length thereof including at said opening;  
 iii) a brush having bristles closely packed together and defining narrow interstices between adjacent bristles, said bristles having proximal ends inserted within said opening;  
   b) opening said ampule and releasing said liquid composition;    c) conveying said liquid composition through said interstices;    d) using said brush to apply said liquid composition.    
   
   
       21 . The method of  claim 20 , wherein said ampule is made of glass.  
   
   
       22 . The method of  claim 20 , wherein said flexible sleeve is made of plastic.  
   
   
       23 . The method of  claim 22 , further including the step of gluing said proximal ends of said bristles into said open end of said sleeve.  
   
   
       24 . The method of  claim 20 , wherein said bristles have circular cross-sections.  
   
   
       25 . The method of  claim 20 , wherein said conveying step includes the step of squeezing said sleeve.  
   
   
       26 . A single-dose applicator comprising: 
 a) an ampule containing a single dose of a liquid composition vacuum packed therein, a flexible sleeve with a closed end and an open end defining an opening, said sleeve defining an internal chamber receiving said ampule, said sleeve having a substantially uniform cross-section throughout a length thereof including at said opening;    b) a brush having bristles closely packed together and defining narrow interstices between adjacent bristles, said bristles having proximal ends inserted within said opening;    c) said liquid composition being released from said ampule and dispensed by flowing through said opening and through said narrow interstices of said brush;    d) said brush being employed to apply said liquid composition, said liquid composition being a same composition as is initially contained within said ampule.    
   
   
       27 . The applicator of  claim 26 , wherein said ampule is made of glass.  
   
   
       28 . The applicator of  claim 26 , wherein said flexible sleeve is made of plastic.  
   
   
       29 . The applicator of  claim 26 , wherein said bristles have circular cross-sections.  
   
   
       30 . The applicator of  claim 26 , further including a protector made of cardboard and extending over said sleeve.  
   
   
       31 . The method of  claim 22 , wherein said applicator has a protector receiving said sleeve therein.  
   
   
       32 . The method of  claim 22 , wherein said conveying step includes the step of squeezing said sleeve.