Aerosol for viscous products

Abstract

An aerosol dispensing container 1 comprising a container body 20, 30, 40 and a collapsible bag 50 therein. The bag 50 separates a pressurised chamber defined between the container body 20, 30, 40 and the bag 50 from a product chamber defined inside the bag 50. A valve 5 is mounted in a valve cup 70 supported by the body 20, 30, 40 and the valve arrangement allows fluid communication between the valve 5 and the product chamber inside the bag 50. An extrinsic support means 54, 55 is carried by the bag 50 and is adapted to ensure flow of product to the valve 5 by preventing radial collapse of the bag 50, whilst allowing axial collapse of the bag 50 as the product is dispensed.

1 . An aerosol container for dispensing a product, comprising:
 a container body,   a collapsible bag disposed therein in the container body,   a pressurized chamber defined between the container body and the bag,   a product chamber defined inside the bag,   a valve carried in a valve cup, the valve arranged in fluid communication with the product chamber,   the bag including extrinsic support structure adapted to prevent radial collapse of the bag to maintain the flow of product to the valve, whilst while allowing axial collapse of the bag as the product is dispensed.   
   
   
       2 . An aerosol container according to  claim 1 , wherein the support structure means comprises a cage or spring. 
   
   
       3 . An aerosol container according to  claim 2 , wherein the spring is disposed within the bag. 
   
   
       4 . An aerosol container according to  claim 1 , wherein the support structure comprises one or more circumferential or helical ribs carried by the bag. 
   
   
       5 . An aerosol container according to  claim 4 , wherein the ribs are carried on the outside of the bag. 
   
   
       6 . An aerosol container according to  claim 4 , wherein the ribs are located within the wall thickness of the bag. 
   
   
       7 . An aerosol container according to  claim 4 , wherein the ribs are discontinuous. 
   
   
       8 . An aerosol container according to  claim 4 , wherein the ribs and the intervening sidewall of the bag are arranged to define a bellows structure. 
   
   
       9 . An aerosol container according  claim 1  wherein the support structure means is made from a material that is compatible with the product. 
   
   
       10 . An aerosol container according  claim 1 , wherein the support structure is a cage. 
   
   
       11 . An aerosol container according  claim 10 , wherein the cage is disposed within the bag.