Claims
- 1. In a ready to fill aerosol type dispenser, closed by an aerosol valve internal expulsion means for and maintaining gaseous dispensing pressure ranging substantially between predetermined maximum and minimum pressure levels for a produce 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 subsequently liquifies, a 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 component 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 memebrs 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 pressuring 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,
- 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 clsoed 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,
- improvement:
- a source of inert gas and gas regulator assembly,
- prior to said initial generation of said pressurizing gas, said aerosol valve is connected to a source of an inert gas, said gas calibrated to pressurize the container at a predetermined pressure level not less than the pressure level to be generated by said initial generation of said pressurizing gas for preventing said expulsion means from inflating at any time before filling the product into said container,
- said container has an entry port,
- said product is injected by force into said container through said entry port of said container, and consequently the internal pressure level not less than the pressure generated by said initial generation of pressurizing gas,
- said product being dispensed when said aerosol valve is opened and the gas content in the head space of the container escapes, thus, said pouch expands under said pressure of said initial generation of said pressurizing gas, which provides the initial force to dispense said product,
- said closed pocket members being separable from their respective closure members to empty their contents into admixture with said second component and to react and generate additional quantities of pressurizing gas as said pouch expands due to dispensing said product, said pouch lines the interior of said container when dispensing said product is complete.
- 2. In the ready to fill aerosol type dispenser defined in claim 1 wherein, said expulsion means having one closed pocket member containing a predeterminedr quantity of said first component, said starting delay device containing a predetermined quantity of said first component and a predetermined quantity of said second component, said dispenser is assembled and sealed prior to filling said flowable prodeuct through said port of entry in the container to surround said expulsion means within said dispenser, said dispenser is pressurized internally by an inert gas at a pressure level not less than the initial pressure to be generated by the chemical reaction of the content of said starting delay device with said second component within said expulsion means.
- 3. In the ready to fill aerosol dispenser defined in claim 2 wherein, said expulsion means contains a starting delay device containing a predetermined quantity of said first component and a predetermined quantity of said second component, said dispenser is assembled and sealed prior to filling said flowable product therein through said port of entry in said container to surround said expulsion means within said dispenser, said dispenser is pressurized by an inert gas at a pressure level not less than the initial pressure to be generated by the chemical reaction of the content of said starting delay device with said second component within said expulsion means.
- 4. The invention of claim 1 wherein, the delay device for the initial generation of gas is initially insertrd in said dispenser during the assembly and removed by pressure disturbance within said dispenser.
- 5. The invention of claim 1 wherein, delay device for the initial generation of gas including one of said two chemical components having an inert coating that after a suitable predetermined period of time dissociates from said one chemical component and permits it to react with the other of the two chemical components.
- 6. The invention of claim 1 wherein, said pressurizing gas generated by a chemical reaction between two chemical components is delayed by sealing one of the chemical components within a thin glass ampule and producing a pressure disturbance sufficient to rupture said thin glass ampule within said container after said container is assembled and sealed, thereby admixing said two chemical omponents which react and generate the initial quantity of pressurizing gas.
- 7. The invention of claim 1 wherein, said delay device for the chemical reaction includes housing a chemical reagent in a small vial having a narrow outlet including a plug of viscous material, which can be removed by introducing pressure disturbance into the container after said container is assembled and sealed, allowing the chemical components to admix and react and generate a predetermined quantity of pressurizing gas.
- 8. The invention of claim 7 wherein, said plug is removed by means of a magnetic force.
- 9. The invention of claim 1 wherein, said delay device for the chemical reaction includes a temporary changing changing of the physical state of one or more of the chemical components which reverts to their original physical state after the dispenser is assembled and sealed.
- 10. The invention of claim 1 wherein, said product to be dispensed is comprised of at least one component selected from the class consisting of bromo-chloro-difluoro-methane, chlor-penta-fluoro-ethane, chloro-trifluro-methane, and dibromo-tetra-fluoro-ethane.
- 11. The invention of claim 1 wherein, the radioactivity at the surface of said dispenser and its component parts and accessories as well as that of the product dispensed therefrom does not exceed 0.1 milliroentgen per hour.
- 12. The invention of claim 1 wherein, a foraminous barrier is located under a valve intake and a perforated tubing located alongside and internally of the container to facilitate the flow of the contents in said container to said valve intake.
- 13. Expulsion means for developing and maintaining gaseous dispensing pressure in a container of a ready to fill dispenser for a dispensable product being dispensed from said container which is closed by an said means comprising a fluid impermeable aerosol valve, expansible flexible closed pouch adapted to be disposed within said container and having a pair of facing wall members, a plurality of pocket members disposed within said pouch in spaced relations to one another and each is affixed to the interior of a first of said facing wall members of said pouch, a predetermined quantity of a first of a two-component gas generation system disposed within each of said pocket members, a closure member for each pocket member associated with the interior of the other member of said pair of facing wall members of said pouch and closing each of said pocket members and releasably adhering to its 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 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 subsequently it liquifies, a starting delay device carrying a predetermined quantity of said first component disposed within said pouch in contact with said second component of said two-component gas generation system for causing the initial generation of pressurizing gas after a predetermined period of time, upon outward expansion of said pouch due to the pressure of said gas generated therein and the evacuation of said dispenser by dispensing said dispensable medium, each of said closed pocket members being adapted to gradually separate from its respective closure member and open sequentially, thereby permitting their contents of aliquots of said first component to contact and react with said second component and generate additional quantities of pressurizing gas within said pouch as said pouch expands due to dispensing said product, said product being 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 predeterimined 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,
- 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,
- improvement:
- a source of inert gas and gas regulator assembly,
- prior to said initial generation of said pressurizing gas, said aerosol valve is connected to a source of an inert gas, said gas calibrated to pressurize the container at a predetermined pressure level not less than the pressure level to be generated by said initial generation of said pressurizing gas for preventing said expulsion means from inflating at any time before filling the product into said container,
- said container has an entry port,
- said product is injected by force into said container through said entry port of said container, and consequently the internal pressure level not less than the pressure generated by said initial generation of pressurizing gas,
- said product being dispensed when said aerosol valve is opened and the gas content in the head space of the container escapes, thus, said pouch expands under said pressure of said initial generation of said pressurizing gas, which provides the initial force to dispense said product,
- said closed pocket members being separable from their respective closure members to empty their contents into admixture with said second component and to react and generate additional quantities of pressurizing gas as said pouch expands due to dispensing said product, said pouch lines the interior of said container when dispensing said product is complete.
- 14. The invention of claim 13 or 12 wherein, the end of each of said extension members of each of said closed pocket members of said plurality of pocket members is affixed by proportionately short heat sealed weld portions to one of two facing walls of said pouch at a predetermined spot, and each of said extension member of each of said closure members respective to said pocket members is affixed by proportionally short heat sealed portion to the other of the two facing walls of said pouch at a predetermined spot, said spots constitute two member identifiable spots of an identifable pair of spots, one of which is located on each of said facing walls of said pouch.
- 15. The invention of claim 1 or 13 wherein, said pouch is comprised of three-layer laminated plastic film, the external layer being Mylar polyester (0.5) to (3) mils thick, the inner layer being low density polyethylene (0.5) to (20) mils thick, and the middle layer being Saran (.TM.) or polyvinylidine chloride deposited by spraying at least one of the inner surfaces of said Mylar and polyethylene layers.
- 16. The invention of claim 15 wherein, said sheet carrying said pocket members is comprised of two-layer plastic lamination having an outer layer of low density polyethylene (0.5) to (20) mils thick, and an inner layer of polypropylene (0.1) to (10) mils thick, said closure members comprised of three-layer plastic sandwich lamination having an inner Mylar polyester layer of (0.3) to (3) mils in thickness, the outer layers of the sandwich being of low density polyethylene of (0.3) to (20) mils thick.
- 17. The invention of claim 16 wherein, each of said pocket members and said starting delay device encapsulating said predetermined quantity of said first component of said two-component gas generation system comprising at least one compound selected from the class consisting of a water soluble mineral acid, carboxylic acid and citric acid, and said second component is comprised of at least one compound selected from the class consisting of barium carbonate, calcium carbonate and sodium bicarbonate in an aqueous medium and said generated pressurizing gas being carbon dioxide gas.
- 18. The invention of claim 17 wherein, each of said plurality of closed pocket members is individually separated and independent from the others.
- 19. The invention of claim 1 or 13 wherein, said delay device comprising at least one device selected from the class consisting of a gelatin capsule, disintegrating pouch and breakable enclosure which break open within said expulsion assembly prior to assembling the dispenser.
- 20. In a ready to fill aerosol type dispenser system, a container defining a dispenser closed by an aerosol valve, said valve having an intake, internal expulsion assembly for developing and maintaining gaseous dispensing pressure ranging substantially between predetermined maximum and minimum pressure levels for a flowable product within said container of the dispenser surrounding said expulsion assembly, a foraminous barrier located within said dispenser under said aerosol valve intake and a perforated tubing located alongside and internally of the dispenser to facilitate the flow of the contents within said dispenser to said valve intake, said expulsion means comprising an enclosed fluid impermeable, flexible closed pouch disposed within said dispenser and having a pair of facing wall members made of low density polyethylene, a plurality of pocket members disposed within said pouch in spaced relations to one another and affixed to the interior of a first and said pair of a 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 said second of said pair of 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, a predetermined quantity of a second chemical component of said two-component gas generation system disposed at the bottom within said pouch and externally of said closed pocket members, said second component includes an ingredient in a frozen state when deposited in said pouch and subsequently liquifies, after said dispenser is assembled and sealed and said flowable product is injected by force into said container of the dispenser through a port of entry in sawid container, the initial generation of said pressurizing gas is activated by means of vacuum by force into said container of the dispenser through a port of entry in sawid container, the initial generation of said pressurizing gas is activated by means of vacuum activation process, said closed pocket members being sequentially separable from their respective closure members to empty their contents into admixture with said second component and to react and generate additional gas as said pouch expands due to dispensing said product when said aerosol valve is switched to an open position, said plurality of pocket members is formed on a plastic sheet comprised of two-layer plastic lamination having an outer layer of low density polyethylene affixed to the interior of said first and said pair of facing wall members of said pouch and an inner layer of polypropylene, said closure members comprised of three-layer plastic sandwich lamination having an inner Mylar polyester layer, the outer layers of said sandwich being of a low density polyetylene formed by heat sealing, so that the low density polyethylene adhers releasably to polypropylene, each of said plurality of pocket members and their particular closure members having an extension heat sealed permanently to the interior of first and second facing walls of said pouch respectively, the length of each said extensions is coordinated with the pressure generated in the dispenser and the quantity of product dispensed.
- 21. In the dispenser defined in claim 20 wherein, said initial generation of said pressurizing gas is activated by means of vacuum activation process is performed by partitioning said expulsion assembly by means of a peelable partition into two subcompartments, one upper subcompartment and one lower subcompartment, one of said subcompartments, the lower subcompartment containing a predetermined quantity of said second chemical component and is suitably inflated with gaseous material prior to partitioning said expulsion assembly, a predetermined quantity of said first component deposited within said upper subcompartment outside said plurality of closed pocket members, whereby gaseous material in the upper subcompartment is purged before said expulsion assembly is closed by a permanent closure formed by heat sealing an open end of the upper subcompartment, after said dispenser is assembled and sealed and said flowable product is filled through a port of entry in said container, a vacuum is pulled through said aerosol valve of said dispenser, and the gaseous content external of said expulsion assembly is reduced, creating parallel pressure around said expulsion assembly, whereby said subcompartment containing said gaseous material expands and ruptures said peelable partition therebetween and allows said two-components to admix and react and thereby generate said initial pressurizing gas which provides the force to dispense said flowable product from said dispenser when said aerosol valve is switched to an open position, said peelable partition is formed by including a step of reducing at least one requirement selecetd from the class consisting of predetermined degree of temperature, the level of pressure and the length of the period of time of the dwell of the hot jaws of the heat sealing machine on the area to be peelably heat sealed, which are required to create permanent heat seal.
- 22. In the aerosol dispenser defined in claim 21 wherein, said peelable partition comprises polypropylene plastic material inserted between the two facing walls of said expulsion assembly in the area where said heat sealed peelable partition is to be located for forming said two subcompartments, said polypropylene plastic material incompatible with said two facing walls of low density polyethylene of said expulsion assembly.
- 23. In the aerosol dispenser described in claim 22 wherein, said dividing of said expulsion assembly into two subcompartments is produced by closing a small pouch by a peelable closure and inserting it within said expulsion assembly, said small pouch containing a predetermined quantity of said first chemical component and is inflated with a predetermined quantity of gaseous material and having two facing walls made of low density polyethylene, said second component is deposited in said expulsion assembly, gaseous material outside said small pouch within said expulsion assembly is purged before said expulsion assembly is closed by a permanent heat seal closure at its open end, after said dispenser is assembled and sealed and said flowable product is filled through a port of entry in said container, a vacuum is pulled through said aerosol valve of said dispenser, and the gaseous content therein externally of said expulsion assembly is reduced, creating partial pressure around said expulsion assembly, whereby said small pouch ruptures and allows the two chemical components to react.
- 24. In the aerosol dispenser defined in claim 23 wherein, said closing of said small pouch by heat sealed peelable closure is formed by means of inserting a polypropylene plastic material between said two facing walls of said small pouch and heat sealing it at open end.
Parent Case Info
This is a continuation-in-part of U.S. patent application Ser. No. 07/494,831, dated Mar. 16, 1990, now U.S. Pat. No. 5,022,564 entitled "A SELF REGULATED PRESSURIZED DISPENSER AND METHOD", WHICH HAS BEEN allowed; which is in turn a continuation-in-part of Ser. No. 07/021,617, now U.S. Pat. No. 4,909,420 filed on Mar. 2, 1987; which in turn is a CIP of Ser. No. 06/671,048 filed Nov. 13, 1984, now U.S. Pat. No. 4,646,946; which in turn is a CIP of Ser. No. 06/413,498 filed Sep. 2, 1982, now abandoned.
US Referenced Citations (15)
Continuation in Parts (4)
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Number |
Date |
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Parent |
494831 |
Mar 1990 |
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21617 |
Mar 1987 |
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Parent |
671048 |
Nov 1984 |
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Parent |
413498 |
Sep 1982 |
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