JPS5857219B2 - How to generate gas pressure in a pressure vessel - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for generating gas pressure in a pressure vessel discharging a flowable product as disclosed, for example, in US Pat. No. 3,178,075.

A common problem with conventional pressure vessels is that the pressure to extrude the product often dissipates too quickly, making it difficult to release the entire contents of the vessel.

This problem often confuses the user of the container and results in wasted product.

The present invention seeks to overcome the above problems by providing sufficient and continuous pressure.

That is, it provides a pressure that adequately and satisfactorily evacuates the contents of the container during pressurization without exceeding predetermined maximum and minimum pressure level limits.

It is an object of the present invention to provide a novel method for generating gas pressure in a pressure vessel that prevents a bag containing propellant from blocking the product flow path within the vessel leading to the outlet of the vessel.

Thus, the present invention provides a new container outlet in which the bag does not expand and obstruct the flow of product through the container outlet.

According to the invention, a plurality of inflatable chambers or compartments are arranged in series and are susceptible to rupture in a container containing a fluid product which is discharged through an outlet in the container controlled by a valve or closure device. Each is separated from the other by a partition.

One compartment has a pressure generating agent which, by addition of a retarder, begins to generate pressure within the compartment after the container has been assembled and filled with the product to be discharged.

The pressure generated causes the compartment to expand and force product out of the outlet of the container when the container valve is open.

Expansion of a compartment causes the associated compartment to rupture, causing an adjacent compartment to communicate with the first compartment.

The chemical reagent in the second compartment reacts or is stimulated to react with the pressure-generating substance in the first compartment to generate further gas and subsequently expand the compartment to release the product under pressure.

This expansion of the compartment then ruptures the second compartment to communicate the third compartment and promotes the chemical reagent in the third compartment to generate further gas and pressure to release the product in the same manner.

The present invention will be described in detail with reference to the drawings below.

The embodiment of FIG. 1 has a camp or top wall 14 and a bottom wall 12.
It consists of a cylindrical container 10 having a diameter.

The cap 14 has a threaded neck 15, the threaded condyle 15 having inwardly projecting flanges 17, 29 and a valve seat 18 with an axial bore 20 in its center.

A cover 21 with a central opening 23 threadably engages the neck 15 .

Mounted within a bore 20 defined by opening 23, flanges 17, 29 and valve seat 18 is flange 17.
The valve 16 is resiliently mounted by a spring 24 cooperating with the valve 19.

The valve 16 has a stem 22 with an opening 19 at its lower end.

The mandrel 22 projects upwardly through the bore 20 of the valve seat 18;
It is fixed to a grip or actuator 28 .

This handle has lateral ducts 30 and a central duct 32.

Side ducts 30 extend from the outside of handle 28 into a central duct 32 and connect to duct 26 which is centered on bore 20 .

Connected to the valve seat 18 of the cap 14 is a perforated dip tube 3 extending to the outlet portion of the container containing the fluid material P to be discharged.
It is 4.

Bore 20 communicates with tube 34 by opening 19 when handle 28 is depressed.

Dip tube 34 may have a variety of sizes and shapes and may be porous.

The force for expelling the contents or product P from the container is generated by a sealed inflatable chamber formed by a pouch or bag-like enclosure 40 contained within the container.

Bag 40 is inflatable either by virtue of its elastic properties or by expanding the bag from the collapsed or deflated condition shown in FIG.

Moreover, the bag 40 is manufactured to an appropriate size and shape so that it is aligned parallel to the inner wall of the container when inflated.

Located along the sides of the container are one or more siphons or guide tubes 38, which can have a variety of sizes and shapes, and can be made porous.

The guide tube 38 prevents the product P from becoming blocked by inflating the bag 40 across the width of the container.

This will be discussed later.

The siphon function is performed by one or more ridges or groups formed on the inner surface of the container wall.

These ridges or groups extend between the bottom and top walls of the container to allow the contents to move freely within the container and to ensure that product P does not reach the container outlet, i.e. valve 16, even if the bag is inflated.
to ensure that it flows.

In the example of FIG. 1, a commercially available 473 m1 (16 oz.)
Assuming the use of an aerosol-type container of the size and 15% of its volume being head space, and considering the solubility of the evolved gas in the contents of bag 40, said bag 4
0 has three partitions S-1, S-2 and S-3 forming chambers A-1, A-2, A-3 and A-4.

In one form of the invention, the bottom chamber A-1 contains (a) W fluid ounces (29,57 m1), designated W in the figure; (b
) a suitable amount of citric acid and (c) a suitable amount of sodium bicarbonate.

By using a delayed process, these materials are prevented from reacting chemically to generate gas until the container is fully assembled and sealed.

Chamber A-2 is anhydrous citric acid C-2? chamber A-3 contains anhydrous citric acid CC-3F, and chamber A-4 contains anhydrous citric acid C-4S'm.

Product P can be, for example, a salad oil released at room temperature (approximately 25° C.).

After the container is fully assembled and sealed, and after a predetermined period of time to slow down the chemical reaction, a chemical reaction occurs in chamber A-1 and the resulting carbon dioxide inflates the bag, causing valve 16 to open. When the container is in the same position, the product P is pushed out of the container and released.

When a predetermined amount of product P is released,
Chamber A-1 has sufficient room to expand to reach its planned expansion, eg, approximately 26% of the container capacity.

Furthermore, more product P is released, and bag 40 continues to be released.
Once the larger space is available for expansion, partition S-1 opens or separates and gas exiting chamber A-1 flows into chamber A-2.

The chemical reagent in chamber A-2 becomes available and reacts with some of the contents originally in chamber A-1, producing more gas than before.

By connecting chambers A-1 and A-2, bag 40 can reach a container capacity of about 46% of its planned inflation.

A sufficient amount of product P is then released.

In FIG. 2, the bag 40 is partially inflated and the compartment S
-1 indicates that chamber A-1 and chamber A-2 are open, that is, separated and communicate with each other.

The partitions S-1, S-2 and S-3 are opened one at a time while the bag gradually inflates while the sealed side of the bag remains intact.

This is because it is constructed to withstand greater pressure than the compartment.

The compartments can be made to open in different ways and at different predetermined pressures depending on the desired purpose.

Various separable adhesives, heat sealable plastics or other means can be used to fabricate compartments for this purpose.

The amount of chemical in the container mentioned above defines the continuous maximum and minimum pressure for the product P (in this particular case -
For example, approximately 4.9 kg/crt't (70PS
ig ) to 2.8 kg/cm (40PS ig
).

But this data changes as the temperature changes.

The solubility of carbon dioxide in water varies with temperature and pressure and the amount of solvent present.

The variation of FIG. 3 shows a container 10 having a valve 16, handle 28, and siphon 38 similar to that shown in FIG.

The inner surface of the upper part 1 of the bag 140 is lined with an inert binder and within this upper part of the bag is a mixture of chemical reagents.

The other part of the bag 140, the lower part O, contains the liquid medium.

These chemical reagents have the ability to react together in the presence of a liquid medium and release gas.

A delay process prevents the chemical reagents from reacting until the container is fully assembled and sealed.

When fully assembled, gas is generated inside the bag creating pressure to facilitate release of product when the valve is in the open position.

The space within the container created by the released product becomes available and is occupied by the inflated bag.

In the process of inflating the bag, the sticky inner surfaces of the bag are pushed apart, allowing a fresh amount of chemical reagent to react and generate more gas than before.

As a result, there will always be sufficient continuous pressure to easily release all product leaving the container in the desired pattern.

This is in fact another type and function of a multi-chamber carrying bag.

The bag is adhesively defined on its interior surface by an inert adhesive, heat sealing means, or other suitable means.

As in the embodiment of FIG. 1, the size and flexibility of the bag in the embodiment of FIG. 2 are as follows.

That is, after the contents of the container have been completely released, the bag completely lines up with the inner wall of the container.

The embodiment shown in FIG. 4 shows a product P within a bag 40, discharging its contents into 16 inlets.

Valve 16 is connected to the open end of bag 40 as follows.

That is, the valve acts as a shut-off, in such a way that product P flows out of the valve when the package is in the rest position.

A dip tube 34 of suitable shape, size, and aperture is connected to the valve seat 18 and extends therefrom toward the opposite end of the bag 400.

In the embodiment of FIG. 4, bore 20 communicates with dip tube 34 by opening 19 when handle 28 is depressed.

When the bag 40 is full, it extends along and in close relation to the interior surface of the container 10 such that the intermediate peripheral portion of the flap sealingly engages the intermediate peripheral surface of the container at B.

Two separation chambers T and L are thus formed between the container side walls and the bag 40 on either side of the bag-to-container peripheral seal B.

Peripheral seal B can be made with a suitable adhesive or other means that can be broken by predetermined pressure.

The chamber L in this example may contain an amount of water, citric acid and sodium bicarbonate;
These are prevented from reacting by a delay process until the package is fully assembled and sealed.

Chamber T may contain an amount of sodium bicarbonate in any suitable form.

These substances in chambers T and L are initially sealed off from each other by seal B.

After the container is assembled and sealed, at the end of a delayed process, the chemicals in chamber L react to generate carbon dioxide gas.

This gas pushes against the walls of the bag 40 to release the product P out of the container in the desired pattern when the valve is opened.

Due to the release of the product, the bag 40 under pressure collapses inwardly and inevitably breaks the seal B.

This brings chambers T and L into communication, and the chemicals therein react and generate more gas in the container than before, which is released to the outside of the bag 40.

Thus, due to the generation of gas originally retained inside the container and the predetermined amount of chemical reagent used, there will always be sufficient pressure against the walls to expel the product out of the container in the desired pattern.

The pressure-sensitive inert adhesive B can also be replaced by equivalent sealing means that are easy to break or separate when subjected to a predetermined pressure.

As a variation (not shown) of the embodiment shown in FIG. 4, the top wall of the bag 40 may be removed and the top end of the bag 40 may be connected directly to the cap 14 or may be connected to a valve assembly as shown in FIG. Instead of being connected to the container body, it can also be connected to the inner upper end of the container body.

Although not shown, any other suitable valve arrangement may be used in conjunction with the embodiment of FIG. 4 as well as other embodiments disclosed herein.

The embodiment of FIG. 5 shows a novel outlet that can be used with any of the embodiments described herein.

A group 138 of suitable size and shape is formed on the interior surface of the container to replace and perform the function of the siphon 38 shown in the embodiment of FIG.

Container 110 is first filled with a product such as mayonnaise in the space above bottom 114 by removing the head space.

Attached to the bottom 114 is a flexible bag 140 of suitable material, size and shape to be placed inside the container.

The outer zone O of the bag 140 is at a suitable pressure (e.g. 3
．． Fill element C-1 under 5 kg/crrt (50 PSig).

The bag 140 extends near its free end as a tube 142 and is suitably secured at its lower open end between the edges of the container body 110 and the container bottom 114.

When the bag 140 extends as a tube 142 near its free end, another suitable attachment method to use is to attach the opening at the bottom of the bag to the inner wall of the container body 110.

Other suitable means of attaching the bag to the container are also possible.

Similar to the embodiment of FIG. 3, the inner surface of the top of bag 140 is lined with an inert binder and the top of the bag contains a mixture of chemical reagents.

The lower part of bag 140 contains a liquid medium.

These chemical reagents can react together and release gas in the presence of a reaction medium.

By using a delay process, the chemical reagents are prevented from reacting until the package is assembled and sealed.

Material C, placed in zone ``■'' within the cavity of the bag, consists of anhydrous citric acid, anhydrous sodium bicarbonate, an inert adhesive, water and compressed gas, with component C-1 placed in zone 'O''.

When material C in zone L is mixed and includes, for example, adhesive and sodium bicarbonate, element C-1 in zone O consists of the remainder of the above-mentioned materials, namely citric acid, water and compressed gas. Ru.

On the other hand, if C is mixed with the adhesive, anhydrous sodium bicarbonate and anhydrous citric acid, element C-1 consists only of water and compressed gas.

For the same reason, when material C in zone L is mixed with an inert adhesive, anhydrous sodium bicarbonate, and anhydrous citric acid and water in outer zone O, element C-1 may simply be a compressed gas; This can be placed in zone O of bag 140 by any suitable means.

By using a delayed process, chemical reactions are inhibited until the package is assembled and sealed.

In the initial state shown in FIG. 5, the bag 140 can be expanded starting from zone O and continuing to zone E, so that fresh chemical reagents emerge and react, producing more gas than before. .

This gas maintains the pressure within the container at the desired maximum and minimum levels.

This gas generation provides a sustained pressure on the product P that releases the product P out of the container when the valve opens.

After all contents have been released from the container, the bag is
They line up perfectly parallel to the inner surface of the container as shown in the embodiment of FIG.

The device shown in FIG. 5 is further useful because while it can be assembled under pressure, element C-1 can be introduced into the bag 140 and then closed by sewing the bottom 114 of the container side wall. It is a point.

If the bag contains some trapped atmosphere in this way, the pressure will serve to temporarily hold the collapsed bag, and the pressure will also be applied to the temporary bottom until the permanent bottom 114 is secured to the container. act as a

Element C-1 may be introduced into bag 140 by other means, such as by forcing C-1 into the bag through a valve or opening (not shown) in the side of the container that can later be mechanically closed. It can be carried out conveniently.

The bag 140 suitably terminates in a tube 142 whose open end is secured between the rim of the container body 110 and the rim of the container outside the base of the valve 16 .

In other variations (not shown), the open end of bag 140 can be secured around a valve inlet or around a mechanically pluggable opening.

Among the delay processes that can be used to delay a predetermined period of time are reactions such as the chemical reaction of sodium bicarbonate and enoic acid with an aqueous medium or any other combination listed below.

(1) Coating the surface of a chemical reagent with an inert material such as gelatin, shellac, or other material that tends to gradually dissolve or break down in a liquid medium.

This process slows down chemical reactions unless the chemical reagents come into contact with each other.

Alternatively, the chemical reagents can be contained within a sealed glass capsule that ruptures with an increase or decrease in pressure inside the container.

When the capsule ruptures, chemical reagents are released and react with their surroundings, producing gas.

Another alternative is to contain the chemical reagents in small glass bottles.

The neck of the bottle is closed with a suitable release valve attached to a dip tube and capped with a viscous material such as petroleum.

Oil will flow out if you raise or lower the internal pressure of the container.

By raising the outlet of the container, the pressure balance between the vial and the container is broken, and the chemical reagents are brought into communication and react with each other to generate gas.

Another alternative is to make chemical reagents extremely brittle.
It is stored in a small bottle capped with the material.

The vial ruptures due to an increase or decrease in the internal pressure of the container.

When this condition occurs, the chemical reagents communicate and react with each other to generate gas.

In yet another alternative, the delay means is a stopper that plugs the vial.

The vial contains a chemical reagent.

After the container is assembled and sealed, the stopper can be removed by magnetic or electromagnetic force.

(2) Adding one or more chemical reagents in a chemically or physically modified form, such as adding water or a liquid medium in a frozen state.

The reaction is accelerated at a suitable temperature by liquefaction of the freezing medium.

(3) Dividing chamber A-1 of FIG. 1 into two separate sections by a partition similar to S-1.

One section, for example the bottom section, can contain the chemical means C1, namely water, citric acid and an amount of gas or atmospheric air.

The upper section of chamber A-1 contains C-1 and a chemical means, such as sodium bicarbonate, in powder, tablet or solution, and the atmospheric content is vented before sealing.

The container is further processed to fully assemble and seal.

It is common practice to leave a head space in a filled container of about 10% to 15% of its capacity.

This space usually contains no product and is simply occupied by atmospheric air or other gases.

When this atmospheric air or gas is vented or evacuated through valve 16, a significant internal pressure drop occurs in the container.

The air contained in the lower section of bag (A-1) expands and pushes up the partition separating the lower section from the upper section of chamber A-1.

Thus, the sodium bicarbonate accumulated in the upper section of chamber A-1 reacts with the citric acid solution accumulated in the lower section of chamber A-1 to generate gas.

The locations of these chemical reagents can be interchanged as appropriate.

Various other alternatives are also possible.

The apparatus is first assembled and sealed, except for the means necessary to initiate the chemical reaction from the package, and then placed in the package, whereby gas is generated and discharges the product out of the container when the valve is opened.

(4) Introducing some unknown factor into the assembled package that can initiate a chemical reaction that ultimately generates gas.

This was previously described in connection with the embodiment of FIG.

The factor that brings the chemical reaction into the container and initiates it is one of the following entities: a chemical reagent, a compressed gas, or simply compression.

In other words, this factor can be physical or chemical or both.

(5) Assembling a partial or complete package under pressure.

Other means of delaying chemical reactions may be devised as appropriate in the practice of this invention.

From the foregoing description, it is clear that an inexpensive and efficient pressure vessel has been devised in which a gas is generated and used as a propellant to effectively discharge the product exiting the vessel.

Furthermore, it is clear that the container does not need to be extremely pressurized, as in conventional containers, to ensure that there is adequate pressure available to evacuate all the product.

In the present invention, the fact that when the product is discharged, more carbon dioxide is released from the reaction of acid and bicarbonate that maintains the pressure within predetermined desired maximum and minimum pressure levels. A continuous gas pressure is generated.

It will be apparent to those skilled in the art that various modifications may be made.

For example, other solids or liquids and other chemicals can be used if desired.

Chemical reagents that react to release gases other than carbon dioxide, or gas mixtures, can also be used in vessels that generate pressure.

The chemical means used are designated C or C and C-1, but may also include other materials such as catalysts, surfactants, antifreeze, etc., which serve some other useful purpose.

The gas is retained inside the container for its useful life.

Additionally, it will be apparent to those skilled in the art that other valves and actuator devices may be used to release product from a container, such as that shown in US Pat. No. 2,671,578.

The bags of the present invention may also be designed to allow for appropriate expansion to facilitate filling or connecting the bags.

A number of chambers are located next to each other or
Alternatively, they may be designed to be located inside each other as shown in FIGS. 18 and 19.

The bag is made of any suitable impermeable or permeable flexible or extensible material.

These materials include plastic-like polyethylene and rubber, metal foils, specially treated fibers, or laminated multilayer film materials.

It is convenient to use multiple bags to serve special purposes.

Appearing in all types of variations of these devices, including bags, are:

i.e. the bag has single or multiple chambers (compartments)
When assembled, fully inflated and undisturbed, the bag occupies almost all the available space in the container, excluding product.

It will be apparent to those skilled in the art that the outer container may be constructed of any suitable flexible or non-flexible material such as glass, plastic, metal, cardboard, insulating material, etc. or combinations of these materials.

Containers may also take on a variety of shapes and sizes.

It will also be clear to those skilled in the art that gas generation, and thus pressure, may be obtained by means other than the chemical reactions described above.

Referring now to FIG. 6, another embodiment of the present invention is shown having a cylindrical container side wall 200 and a bottom wall 202 whose edge 203 is bent into sealing engagement with the lower portion of the side wall. and,
and a top wall 204 connected to side walls 200 in the same manner as before.

An outlet 205 is provided in the top wall to accommodate a suitable valve (not shown).

Within the container is a flexible bag-like enclosure 206 with an open end 207.

Enclosure 206 is secured to the side wall by clips 208 or other suitable devices.

The closed end 209 of the bag is on the side of the clip towards the outlet 205 of the container.

A dip tube 212 attached to the inlet of the siphon 210 or valve is provided on the interior side wall of the container to facilitate flow to and communication between the product and the outlet 205 of the container, the upper ends of which are connected to the inlet of the container. Head towards exit 205.

Both siphon 210 and dip tube 212 are open at opposite ends and have a number of holes along their lengths as shown.

A product is placed in the container, and the product is delivered to the outlet 205 and the bag 2.
It occupies the space between 06 and 06.

A suitable valve (not shown) is attached to outlet 205.

The space between the container bottom 202 and the bag is filled with a suitable propellant through an opening 214 in the bottom wall 202.

Opening 214 is then closed with a suitable lid 216.

The pressurizing agent pushes the product and releases it from the valve when the valve is open.

FIG. 7 shows another embodiment of the present invention similar to FIG.

However, in the present invention, the bag 220 has a narrow opening neck 222.
The neck is attached to the bottom wall 224 of the container rather than to the side walls as in the embodiment of FIG.

The bag 220 is filled via a passageway 226 raised in the bottom wall.

Passageway 226 communicates directly with bag neck 222 and is suitably closed with lid 228 after filling the bag with propellant.

Referring now to FIG. 8, another embodiment of the present invention is shown which incorporates an unrestrained floating bag 230 for containing propellant.

The cylindrical side walls, top wall and bottom wall of the container are similar to those in the description of the embodiment of FIGS. 6 and 7.

However, in this embodiment, the bag 230 is not attached to any part of the container, but rather is free to move in any direction.According to a novel aspect of the invention, the bag 230 is filled with propellant and the lid of the container is sealed. and a valve (
(not shown) opens at normal temperatures and pressures, the propellant exerts sufficient pressure on the product to expel it from the outlet of the container in the desired manner.

9 and 10, another embodiment of the invention is shown,
This includes a cylindrical side wall 240, a top wall 242 and a bottom wall 24 that engage opposite ends of the side wall in a tight-fitting engagement to define an outer container.
It consists of a container with 3.

The propellant is contained in a bag 244 which is secured to the container by clamping the mouth portion between the bottom wall cinching portion 246 and the side wall of the container.

Bag 244 may be filled with propellant in any suitable manner.

For example, one such example, described in connection with the embodiment of FIG. 6, may be filled with a single or multi-component suitable compressed gas.

Additionally, a dip tube or siphon 245 may be used in this embodiment as well as in the other embodiments described above.

According to another novel aspect of the invention, flow control element 250
is provided in the container between the propellant bag 244 and the container outlet 252, the purpose of which is to prevent the propellant bag from occluding the flow of product P at the container outlet due to expansion of the bag.

Flow control element 250 has a generally annular shape defining a central passageway 254 and extends from the outer surface of element 250 to central passageway 25.
A radial flow passageway 256 reaching 4 is provided.

Although not shown, the flow control element 250 may have suitable radial ridges formed at circumferentially spaced locations on its top and bottom surfaces to further improve product flow. .

In the 2.3 embodiment, the flow control element is free floating within the container, while in other embodiments the element is securely attached to the container.

The flow control element 250 improves the flow of the product in the container while not only preventing the bag from blocking the outlet 252, but also preventing the bag from snagging on sharp ridges that may appear on the inner surface of the container. do.

The combination of flow control element 250 and siphon 2450 constitutes a flow control device within the container.

Figures 11, 12, 13 and 14 illustrate various container shapes and constructions that can be used to carry out various aspects of the invention.

The container shown in FIGS. 11 and 12 is formed with top and bottom walls or panels 260, 262, which panels can be concave or convex and are wrapped around the ends of side walls 264, 265.

In the embodiment of FIG. 11, side wall 264 is cylindrical, whereas in the embodiment of FIG. 12, side wall 265 has a concave longitudinal section as shown.

In the embodiment shown in FIG. 13, the top 270 and bottom 2
71 is integral with the side wall 272 of the container and its upper top wall portion 270
forms the outlet 275 of the container.

The bottom of side wall 272 is folded inward to form bottom wall 271 .

In other embodiments (not shown), the bottom 271 may be convex and bulge outward.

In the embodiment of FIG. 14, the container has an overall barrel shape as shown.

The embodiment shown in FIG. 15, as well as other embodiments disclosed herein, has a container and bag-like arrangement similar to the container shown in FIG. 9, for example.

However, in accordance with another aspect of the invention, the dip tube 280 extends from the bottom wall 282 of the container to the top wall 283 and further extends to the outlet 283 of the container.
84.

Referring now to FIG. 16, a novel outlet 300 is shown that may be used in conjunction with any of the previously described embodiments.

This outlet 300 may be formed as a separate fitting or attachment that can be attached to the side wall of the container, or it may be an integral part of the top of the container by forming a ridge extending from the periphery and across the inner surface towards the center of the container top. It may be formed as

The outlet 300 may comprise a rigid body having an outlet passage 301 through which the product flows from the container, and an internal chamber formed by a hollow portion of the rigid body below the outlet.

A plurality of ridges 302 are formed on the inner wall surface of the rigid body, which ridges are directed towards the outlet of the container to provide a path for the product to flow to the outlet of the container.

When the outlet attachment is secured to the container and, for example, a propellant bag attached to the container expands into contact with the inner surface 205 of the outlet, the ridge 300 still provides an open flow path for product to exit through the outlet opening 301. forgive.

Although the special embodiment shown in FIG. 16 uses ridges,
It will be clear that in other variations the passage may be formed by any suitable arrangement that provides the desired open flow path for the outlet or by providing holes in the outlet body.

In the embodiment of FIG. 17, the container sidewall 310 includes one or more longitudinally extending ridges 312. In the embodiment of FIG.

This ridge serves as a channel through which the product can reach the interior surface of the container from any point near the outlet 3140 of the container.

In this manner, the attached propellant bag (not shown) is inserted into the ridge 312 when the outlet valve (not shown) opens and inflates.
will still provide an open flow path even if the bag inflates to other portions of the surface of the sidewall 316 of the container.

Although detailed illustrative embodiments of the invention have been described as specific examples,
It will be apparent that various other modifications will readily occur to those skilled in the art without departing from the scope and spirit of the invention.

It is therefore intended that the claims should not be limited to what is described herein, but rather include all equivalents that would be obvious to one of ordinary skill in the art upon understanding the invention.

[Brief explanation of the drawing]

FIG. 1 is a vertical cross-sectional view of a pressure vessel with an assembled inner bag-like enclosure in which the present invention may be practiced, showing the vessel in its initial operating condition. FIG. 2 is a vertical cross-sectional view similar to the container of FIG. 1, except that the valve is in the open position and the bag-like enclosure is partially inflated to release the product. FIG. 3 is a schematic vertical sectional view of the modified bag structure within the container. FIG. 4 is a vertical cross-sectional view of another modified bag structure within the container. FIG. 5 is a vertical cross-sectional view of another modified bag structure within the container. FIG. 6 is a vertical cross-sectional view of another embodiment of the invention showing the means for attaching the bag-like enclosure containing the propellant to the inner wall portion of the container. FIG. 7 is a vertical cross-sectional view of another embodiment of the invention showing various configurations of the bag-like enclosure containing the propellant for releasing the product and showing other ways of attaching the bag-like enclosure to the container; . FIG. 8 is a vertical cross-sectional view of yet another embodiment of the invention in which a bag containing propellant is freely floating within a container and is filled with an improved propellant. FIG. 9 is a vertical cross-sectional view of another embodiment of the invention, with internal flow control elements to prevent the propellant bag from occluding the flow of product at the outlet of the container. FIG. 10 is a plan view of the internal flow control element that appears in the embodiment of FIG. 9. FIGS. 11-14 are vertical cross-sectional views illustrating various container structures and shapes that may be used in practicing the present invention. Figure 15 is a vertical cross-sectional view of another embodiment of the invention, with the dip tube running along the inner wall of the vessel to the outlet of the vessel, and the bag containing the propellant attached to the bottom of the vessel; . FIG. 16 is a cross-sectional view of an outlet attachment or fitting that may be used with a pressure vessel to prevent a bag of propellant within the vessel from blocking the outlet passageway of the vessel. FIG. 17 is a vertical cross-sectional view of another container that prevents internal ridges along the container from blocking the product flow path to the mouth of the container. FIG. 18 is a vertical cross-sectional view of multiple chambers, one inside the other, with the smallest size chamber being the innermost one. FIG. 19 is a vertical cross-sectional view of multiple chambers, each inside another but with the wall of the bag in common, the smallest chamber being the innermost one. 10.110... Container, 16... Valve,
28...-actuator, 38,210,245
...-siphon, 40,140,206,220
, 230° 244... Enclosure (bag), 25
0... Fluid control element, 256... Radiation passage, P... Product, Sl, S-2, S-3...
...-Partition, A-1, A-2゜A-3, A-4...
...1.2.3.4 Chamber 10...Container, 12...-Bottom wall, 14...Top wall, 1
5...Neck, 16...Valve, 17, 29
...Flange, 18... Valve seat, 19.
...Opening, 20...Bore, 21...
...Cover, 22...Mandrel, 23...
Center opening, 24... Spring, 26, 30, 32.
...Duct, 34...Pipe.

Claims (1)

[Claims] 1. A process in which a gas pressure is continuously generated for the purpose of discharging a flowable product from a container containing a flowable product which is controlled by a cap and released through an outlet of the container, in which a chemical is The pressure within the container is increased to create a reaction and release a portion of the product, and the closure of the second chamber of the container is ruptured to bring the chambers into communication, thereby increasing the pressure between the chemicals in both chambers. The chemical reaction in the second chamber causes more gas to be generated within the container to release the product, and the closing seal of the second chamber is weakly bonded than the seal that defines the bag and the amount of time required to destroy the bag. A method of generating gas pressure in a pressure vessel, characterized in that it ruptures at a pressure lower than the pressure.