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A flexible closed plastic pouch disposable within a container holding a product for supplying dispensing pressure therein. A plurality of pocket members disposed at spaced positions within said pouch with their openings facing the interior of the pouch. Each pocket member having an extension of a pr

A flexible closed plastic pouch disposable within a container holding a product for supplying dispensing pressure therein. A plurality of pocket members disposed at spaced positions within said pouch with their openings facing the interior of the pouch. Each pocket member having an extension of a predetermined length attached at its end to the interior of first of two facing wall members of the pouch. Each pocket member enclosing a predetermined quantity of first component of a two-component gas generation system and being releasably closed by one of a plurality of closure members, each of said closure members having an extension of a predetermined length attached at its end to the interior of the second of the two facing walls of the pouch. The pouch contains a second component of said two-component gas generation system and a starting component encapsulated within a delay device to initially generate a predetermined quantity of pressurizing gas after a delay of a predetermined period of time. The pressurizing gas inflates and expands the pouch within the container under pressure. Due to the dispensing of the product, the pouch expands further and causes sequential separation of the pocket members from their closure members and serial opening of each pocket member to add predetermined quantities of aliquot of the first component to the second component and further generate additional quantities of pressurizing gas. The internal pressure within the container is maintained substantially within a range of predetermined maximum and minimum pressure levels until dispensing the product from the container is completed.

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In an aerosol type dispenser, internal expulsion means for developing and maintaining gaseous dispensing pressure ranging substantially between predetermined maximum and minimum pressure levels for a product within a container of the dispenser, said expulsion means comprising an enclosed fluid imper

In an aerosol type dispenser, internal expulsion means for developing and maintaining gaseous dispensing pressure ranging substantially between predetermined maximum and minimum pressure levels for a product within a container of the dispenser, said expulsion means comprising an enclosed fluid impermeable, flexible closed pouch disposed within said dispenser and having a pair of facing wall members, a plurality of pocket members disposed within said pouch in spaced relation to one another and affixed to the interior of a first of said pair of facing wall members of said pouch, a predetermined quantity of a first component of a two-component gas generation system disposed within each of said pocket members, closure members associated with the interior of the second of said pair of said facing wall members of said pouch closing each of said pocket members and releasably adhering to their contacting surfaces, thereby forming a plurality of closed pocket members each containing a predetermined quantity of said first component of said two-component gas generation system, a predetermined quantity of a second component of said two-component gas generation system disposed within said pouch and externally of said closed pocket members, said second component of said two-component gas generation system includes an ingredient in a frozen state when deposited in said pouch and which subsequently liquifies after placed in said pouch, starting delay device carrying a predetermined quantity of said first component disposed within said pouch in contact with said predetermined quantity of said second component of said two-component gas generation system for causing the initial generation of gas after a prescribed period of time, said closed pocket members being sequentially separable from their respective closure members to empty their contents into admixture with said second componet and to react and generate more gas as said pouch expands due to dispensing said product, said product being dispensed disposed externally of said pouch within said container, a plurality of identifiable pairs of spots, each comprising two identifiable member spots, and one member spot is located on said first and the other member spot is located on said second of said facing wall members of said pouch, each of said plurality of closed pocket members having a first extension of a predetermined length extending from the edge of its pocket member and is affixed at its end to said first facing wall member of said pouch at one identifiable member spot of an identifiable pair of spots of said plurality of identifiable pairs of spots, and a second extension member of a predetermined length extending from the edge of each closure member closing a respective pocket member of said plurality of closed pocket members is affixed at its end to said second facing wall member of said pouch at the other identifiable member spot of said identifiable pair of spots, whereby as the product is dispensed, the pouch expands and its said first and second facing wall members move away from each other under pressure, thus causing the distance between said ends of said first and second extension members of each of said closed pocket members affixed to said first and second facing wall members of said pouch to exceed the total predetermined lengths of said first and second extension members of said closed pocket members, thereby, causing sequential separation of each of said pocket members from their respective closure members according to a predetermined sequence and serial opening of each of said closed pocket members, which discharge their contents sequentially and generate additional predetermined quantities of pressurizing gas each time the internal pressure within said dispenser drops to a predetermined minimum pressure level, whereby said pouch increases in size to a predetermined capacity each time the internal pressure within said dispenser drops from predetermined maximum to predetermined minimum pressure levels, whereby dispensing said product from said dispenser causes the internal pressure therein to alternate continuously between said predetermined minimum and maximum pressure levels, and whereby the coordination of said range of predetermined maximum and minimum pressure levels with, the lengths of the extension members of each of said pocket and closure members of said plurality of closed pocket members, the quantity of said first component enclosed within each of said pocket members and in the starting delay device, the order of sequence of the opening of each of said closed pocket members, and the quantity of said second component deposited within said pouch is necessary for dispensing said product within the range of predetermined maximum and minimum pressure levels.