Spout fitting for liquid-containing pouch

Abstract

A pouch adapted to contain a fluent material has a fitting having a base fitted hermetically to the pouch and having a surface exposed in the pouch. A tubular spout projects outward from the base and forms with the base a throughgoing passage opening into the pouch and having an inner surface. A liner of a barrier material covers both of the surfaces. A layer of plastic covers inner surfaces of the liner. This layer of plastic can be unitary with the base and spout so that the liner is imbedded in the base and spout, or a separate not unitary piece fitted over the liner to the fitting. Normally the liner is unitarily formed of one piece, and is in fact a generally T-shaped body like the combined spout and base.

1 . In combination with a pouch adapted to contain a fluent material, a fitting comprising: 
 a base fitted hermetically to the pouch and having a surface exposed in the pouch;    a tubular spout projecting outward from the base, the spout and base forming a throughgoing passage opening into the pouch and having an inner surface; and    a liner of a barrier material covering both of the surfaces.    
   
   
       2 . The pouch spout fitting defined in  claim 1 , further comprising 
 a layer of plastic covering inner surfaces of the liner.    
   
   
       3 . The pouch spout fitting defined in  claim 2  wherein the plastic layer is unitary with the base and spout, whereby the liner is imbedded in the base and spout.  
   
   
       4 . The pouch spout fitting defined in  claim 2  wherein the plastic layer is not unitary with the base or spout.  
   
   
       5 . The pouch spout fitting defined in  claim 1  wherein the liner is unitarily formed of one piece.  
   
   
       6 . The pouch spout fitting defined in  claim 1 , further comprising 
 a frangible layer of barrier material covering an outer end of the passage on the spout.    
   
   
       7 . The pouch spout fitting defined in  claim 6  wherein the frangible layer contacts the liner.  
   
   
       8 . The pouch spout fitting defined in  claim 6  wherein the frangible layer is formed with a weakening line.  
   
   
       9 . The pouch spout fitting defined in  claim 6  wherein the frangible layer is a foil.  
   
   
       10 . The pouch spout fitting defined in  claim 9  wherein the foil of the frangible layer is sealed over the outer end of the passage.  
   
   
       11 . The pouch spout fitting defined in  claim 1  wherein the spout is formed with an external screwthread, the fitting further comprising 
 an internally threaded cap fittable over the spout.    
   
   
       12 . The pouch spout fitting defined in  claim 11 , further comprising 
 a frangible layer of barrier material covering an outer end of the passage on the spout, the cap being formed with an inwardly extending projection that can be forced through the frangible layer.    
   
   
       13 . The pouch spout fitting defined in  claim 12  wherein the cap has an end wall formed with the projection.  
   
   
       14 . The pouch spout fitting defined in  claim 11 , further comprising 
 a tamper-indicating ring surrounding the spout; and    a frangible connection between the ring and cap.    
   
   
       15 . The pouch spout fitting defined in  claim 1  wherein the barrier material is metal.  
   
   
       16 . The pouch spout fitting defined in  claim 15  wherein the metal is aluminum.  
   
   
       17 . The pouch spout fitting defined in  claim 1  wherein the barrier material is a plastic.