Aerosol package of product containing liquified gas

Claim 2

An aerosol package comprising a substantially rigid container having a dispensing valve, a collapsible flexible container inside of said rigid container and internally fluid connected to said valve and containing an extrudable product in which liquified compressed gas is intimately dispersed or dissolved, said product being adapted to be dispensed through said valve, and liquified compressed gas propellant between said containers and applying fluid pressure to said flexible container and which is transmitted therethrough to said product to extrude said product upon operation of said valve, said propellant having a vapor pressure substantially greater than the vapor pressure of said gas in said product while intimately dispersed or dissolved therein, said liquified gas in said product normally tending to form gas bubbles interfering with a uniform extrusion of said product and the vapor pressure of said propellant being great enough to apply enough compression to said product through said flexible container to prevent formation of said bubbles, said package including a flexible tube by which said flexible container is connected to said valve, said tube extending from said valve a substantial distance within said flexible container and said tube having a lengthwise series of openings in its wall, said flexible container collapsing as said product is extruded therefrom and said openings preventing blockage of said tube by said collapsing container.

Claim 3

An aerosol package comprising a substantially rigid container having a dispensing valve, a collapsible flexible container inside of said rigid container and internally fluid connected to said valve and containing an extrudable product in which liquified compressed gas is intimately dispersed or dissolved, said product being adapted to be dispensed through said valve, and liquified compressed gas propellant between said containers and applying fluid pressure to said flexible container and which is transmitted therethrough to said product to extrude said product upon operation of said valve, said propellant having a vapor pressure substantially greater than the vapor pressure of said gas in said product while intimately dispersed or dissolved therein, said liquified gas in said product normally tending to form gas bubbles interfering with a uniform extrusion of said product and the vapor pressure of said propellant being great enough to apply enough compression to said product through said flexible container to prevent formation of said bubbles, said rigid flexible containers forming therebetween a space and said liquified compressed gas having a volume substantially less than the volume of said space, said flexible container being capable of flopping about within said space when said rigid container is shaken and said dispensing valve having an inlet which the flexible container is capable of blocking as the flexible container collapses, the dispensing valve''s said inlet having an extension in which a plurality of holes are formed and which prevents said blocking, said extension leaving said flexible container substantially free from restraint to its said flopping about within said space, said liquified compressed gas forming vapor in said space and thereby applying said fluid pressure to said flexible container.

Claim 4

An aerosol package comprising a substantially rigid container having a dispensing valve, a collapsible flexible container inside of said rigid container and internally fluid connected to said valve and containing an extrudable product in which liquified compressed gas is intimately dispersed or dissolved, said product being adapted to be dispensed through said valve, and liquified compressed gas propellant between said containers and applying fluid pressure to said flexible container and which is transmitted therethrough to said product to extrude said product upon operation of said valve, said propellant having a vapor pressure substantially greater than the vapor pressure of said gas in said product while intimately dispersed or dissolved therein, said liquified gas in said product normally tending to form gas bubbles interfering with a uniform extrusion of said product and the vapor pressure of said propellant being great enough to apply enough compression to said product through said flexible container to prevent formation of said bubbles, said rigid flexible containers forming therebetween a space and said liquified compressed gas having a volume substantially less than the volume of said space, said flexible container being capable of flopping about within said space when said rigid container is shaken and said dispensing valve having an inlet which the flexible container is capable of blocking as the flexible container collapses, the dispensing valve''s said inlet having an extension in which a plurality of holes are formed and which prevents said blocking, said extension leaving said flexible container substantially free from restraint to its said flopping about within said space, said liquified compressed gas forming vapor in said space and thereby applying said fluid pressure to said flexible container.

Claim 5

The package of claim 1 in which the vapor pressure of said gas In said product ranges from about 3 to about 40 pounds per square inch gauge, and the vapor pressure of said propellant is at least about 5 pounds per square inch gauge higher than the vapor pressure of said gas while intimately dispersed or dissolved therein, plus the collapse resistance of said flexible container; when said package has a temperature of approximately 70*F.

Claim 6

The package of claim 1 in which said liquified gas in said product converts to gas or vapor phase when said product is dispensed to the atmosphere, and thereby alters the physical form of said product.

Claim 7

The package of claim 1 in which the vapor pressure of said gas in said product ranges from about 3 to about 40 pounds per square inch gauge, and the vapor pressure of said propellant is at least about 5 pounds per square inch gauge higher than the vapor pressure of said gas in said product while intimately dispersed or dissolved therein, plus the collapse resistance of said flexible container; when said package has a temperature of approximately 70*F.

Claim 8

The package of claim 3 in which said flexible container collapses when under an external pressure of less than 20 pounds per square inch gauge.

Claim 9

The package of claim 5 in which said flexible container collapses under an external pressure of less than approximately 20 pounds per square inch gauge.

Claim 10

The package of claim 2 in which said rigid container is a can having a side wall and a top, the peripheries of the side wall and top being clamped in a mechanical seam, and said flexible container is an open-topped bag having its top peripherally clamped in said mechanical seam.