Pouch for a pressurized bottle

Abstract

The invention relates to a pouch for a pressurized bottle, made up of a tubular wall closed in its upper part by a welded seam into which a valve is incorporated. According to the invention, the tubular wall is obtained by overlapping and welding together the two lateral edges of a strip, and the tubular wall is closed in its lower part by an essentially round bottom wall. Thus, the tubular wall of the pouch will have a practically circular cross section in a large lower part, this cross section tending towards an elliptical shape as it nears the upper end where it becomes completely flat. The pouch will, at least in a major lower part, occupy practically all the space in the bottle, considerably reducing the dead space in that part.

1 . Pouch for a pressurised bottle composed of flexible tubular wall closed in its top part by flattening the tubular wall in order to weld it on itself, an aerosol valve being integrated in the weld, characterised in that the tubular wall is obtained by overlapping and welding the two lateral edges of a strip. 
   
   
       2 . Pouch according to  claim 1 , wherein the top part of the lateral weld is situated at one of the ends of the top weld of the tubular wall. 
   
   
       3 . Pouch according to  claim 1 , wherein the tubular wall is closed in its bottom part by welding its bottom edge flat. 
   
   
       4 . Pouch according to  claim 3 , wherein the bottom weld and top weld are substantially in the same plane. 
   
   
       5 . Pouch according to  claim 1 , wherein the tubular wall is closed at its bottom part by an essentially round bottom wall. 
   
   
       6 . Pouch according to  claim 5 , wherein the bottom wall is produced from a flexible material, preferably from the same material as that used for the tubular wall. 
   
   
       7 . Pouch according to  claim 5 , wherein the bottom wall is essentially flat and perpendicular to the longitudinal axis of the pouch. 
   
   
       8 . Pouch according to  claim 5 , wherein the bottom wall is fixed to the internal face of the tubular wall. 
   
   
       9 . Pouch according to  claim 1 , wherein the bottom wall is fixed to the tubular wall by a folded-over edge. 
   
   
       10 . Pouch according to  claim 1 , wherein the tubular wall consists of a metal/plastic film, preferably aluminium associated with polypropylene, high- or low-density polyethylene, EVOH (ethylene vinyl alcohol) and/or Orgaloy® (a mixture of polyamide and polypropylene). 
   
   
       11 . Pouch according to  claim 2 , wherein the tubular wall is closed in its bottom part by welding its bottom edge flat. 
   
   
       12 . Pouch according to  claim 2 , wherein the tubular wall is closed at its bottom part by an essentially round bottom wall. 
   
   
       13 . Pouch according to  claim 12 , wherein the bottom wall is produced from a flexible material, preferably from the same material as that used for the tubular wall. 
   
   
       14 . Pouch according to  claim 6 , wherein the bottom wall is essentially flat and perpendicular to the longitudinal axis of the pouch. 
   
   
       15 . Pouch according to  claim 12 , wherein the bottom wall is essentially flat and perpendicular to the longitudinal axis of the pouch. 
   
   
       16 . Pouch according to  claim 13 , wherein the bottom wall is essentially flat and perpendicular to the longitudinal axis of the pouch. 
   
   
       17 . Pouch according to  claim 6 , wherein the bottom wall is fixed to the internal face of the tubular wall. 
   
   
       17 . Pouch according to  claim 7 , wherein the bottom wall is fixed to the internal face of the tubular wall. 
   
   
       19 . Pouch according to  claim 17 , wherein the bottom wall is fixed to the tubular wall by a folded-over edge. 
   
   
       20 . Pouch according to claim  18 , wherein the bottom wall is fixed to the tubular wall by a folded-over edge.