Collapsible bag, aerosol container incorporating same and method of assembling aerosol container

An aerosol container comprising a base container defining an annular bead;

• an improved collapsible bag for containing a product to be dispensed from the aerosol container, the improved collapsible bag having an opening at one end and being closed at an opposite end, the closed end of the improved collapsible bag being received within the base container and the open end of the improved collapsible bag having a curl portion which engages the annular bead of the base container to support the improved collapsible bag within the base container;
• an actuator assembly supporting an actuator button, the actuator assembly being crimped to a mounting cup, and the mounting cup, supporting the actuator assembly and the actuator button, being crimped to the bead of the base container, following placement of the mounting cup over the improved collapsible bag and the base container, to form the aerosol container;
• the improved collapsible bag comprising:
• an upper section including the curl portion, a neck portion and an outwardly tapering section, and the outwardly tapering section tapering outwardly in an inflated state of the improved collapsible bag;
• a mid-section contiguous with the outwardly tapering section, the mid-section being generally cylindrical in shape;
• a lower section contiguous with the mid-section and defining the closed end of the improved collapsible bag, and the lower section tapering inwardly in an inflated state of the improved collapsible bag;
• at least the curl portion of the upper section having a sufficient first wall thickness to facilitate a fluid tight seal between said annular bead and a perimeter curl of the mounting cup during assembly of an aerosol valve, the outwardly tapering section, the mid-section and the lower section having a second wall thickness less than the first wall thickness to facilitate insertion of the improved collapsible bag into the aerosol container during assembly, to promote collapse of the improved collapsible bag during dispensing of the product to be dispensed, and to facilitate substantially complete dispensing of the product from the improved collapsible bag;
• and
• a small radius transition between the neck portion and the outwardly tapering section having a sufficiently sized minimum inner diameter so that the small radius transition is spaced from an exterior surface of the actuator assembly when the mounting cup is secured to the curl portion of the improved collapsible bag, the small radius transition has a gradual transition from the first wall thickness to the second wail thickness, the small radius transition provides a reduced diameter area which partially separates the opening from the remainder of the improved collapsible bag, and the small radius transition promotes bending of the outwardly tapering section when the improved collapsible bag is filled with the desired product to be dispensed.