JPH0811592B2 - Self-pressurized container - Google Patents

Description

Detailed Description Related Applications Prior US Patent Application No. 07 filed on May 26, 1989
The applicant claims to enjoy the application of / 358,392, the present application is a continuation-in-part application of the application 07 / 358,392.

TECHNICAL FIELD The present invention relates to a self-pressurizing container for containing and distributing a fluid substance.

Prior Art Aerosol containers for containing and dispensing fluids are well known and widely used. Examples of products contained and sold in aerosol containers include whipped cream, cosmetics such as shaving cream, deodorants, hair sprays and paints. To carry out the application, it is necessary to add the propellant under pressure. Therefore, when an aerosol container is used, a fluid product material can be almost completely sprayed from the container, which is convenient in various aspects. However, when the aerosol container is emptied, the firing pressure tends to drop and the fluid product tends to be sprayed inconsistently.

The main problem with aerosol containers is that the propellant used and the given pressure cause environmental pollution. Aerosol containers are classified into either of the following two types. That is, 1)
A standard aerosol container in which product material and propellant mix
2) An aerosol container called a barrier pack in which the product material and the propellant remain separated. By the way, according to the isolation pack container, even if the product material is exhausted from the container, since the propellant is confined in the container, in the case of incineration of this kind of container, if the number of crushing is very large, This is one of the problems because it is very dangerous because a large amount of propellant appears as a group and may cause a state of explosion. As a matter of reality,
Explosions have taken place at the recycling energy facility in Akron, Ohio, due to the large number of crushed isolation pack aerosol containers prior to incineration.

The major propellants are fluorocarbons and fluorofluorocarbons (CFC ₃ ). Recently, the use of these materials has caused an environmental problem, in particular, an adverse effect on the ozone layer in the upper atmosphere, and the attitude to pursue other substitutes has been rapidly found. In fact, some manufacturers of such materials even commit to long-term product outages. Other propellants include hydrocarbons, especially liquefied petroleum gas (LPG) hydrocarbons such as butane and pentane. While this material does not tend to destroy the ozone layer (to the best of our knowledge), it is flammable and dangerous.
Also, no matter what propellant is used, it is certain that there is a danger in filling, transporting, storing and incinerating the aerosol container because it is under high pressure. Due to this danger, costs and insurance premiums for considering safety are directly reflected in filling and handling.

Therefore, as an alternative to the aerosol container, a self-pressurizing container has been proposed. Typical of self-pressurizing containers are Venus, Jahr. U.S. Patent No. 4,38 in the name
7,833 and US Pat. No. 4,423,829 in the name of Katz. These prior examples are similar in their disclosure to each other and both describe devices for containing and distributing fluid under pressure,
No propellant is used, the fluid to be dispensed is contained in a flexible plastic liner, which is placed inside a fabric sleeve or elastic sleeve (inside out). The sleeves flex around the liner at the top except for the narrow neck. The liner is provided with a plurality of folded portions extending in the longitudinal direction (excluding the neck portion). When this liner is filled with a given product material under pressure, the entire structure expands radially. When the liner is folded and unpressurized, it has a star-like shape, and when it is fully inflated it has a nearly circular cross section. Therefore, by expanding radially,
Such an elastic liner will store energy.
This stored energy in the sleeve causes the fluid to be expelled by opening the spray valve. The container structure is then radially contracted to collapse the liner when the container is empty.

By the way, according to this type of self-pressurizing container, even if the container is emptied to a minimum, a considerable amount of product material remains inside the liner. This is because the liner in the above-mentioned Venus and Katz patents is formed into a smooth and substantially cylindrical shape (for example, by blow molding), and then a folded portion or a wrinkle is formed. And since the preferable plastic material to be used has a "memory effect" in a completely folded state, not in a natural state, the liner itself does not try to completely fold it. This point is important in the sense that the release of product material is almost complete.

Further, a disadvantage of the above-mentioned Venus and Katz patents is that a valve structure is provided on the upper part of the container. In this valve structure, only the cylindrical wall of the valve body is connected to the neck portion of the liner, and no other supporting structure is added.

Further, in the liner, the neck portion is thicker than the other portions, and is designed to be applied only to the valve structure.

DISCLOSURE OF THE INVENTION One of the features of the present invention is to provide a reusable and recyclable self-pressurizing container having the following configuration.

That is, a disadvantage of the above-mentioned Venus and Katz patents is that the valve structure is provided on the upper part of the container. In this valve structure, only the cylindrical wall of the valve body is connected to the neck portion of the liner, and no other supporting structure is added.

Further, in the liner, the neck portion is thicker than the other portions, and is designed to be applied only to the valve structure.

DISCLOSURE OF THE INVENTION One of the features of the present invention is to provide a reusable and recyclable self-pressurizing container having the following configuration.

That is, (a) one end is open and the other end is closed, and upper side wall means is provided in the vicinity of the opening end, and the upper side wall means extends from the upper side wall means to the closed end. A radially inflatable flexible plastic liner having regular folding portions forming a plurality of extending folding portions; and (b) an elastic sleeve that surrounds at least a main portion of the liner in a tightly closed state. c) an outer frame consisting of a generally rigid annular dome having a central hole and a ring surrounding the central hole and a side wall; (d) valve means for distributing a fluid substance from the inside of the plastic liner; The tubular dome has a tubular discharge stem for discharging the fluid substance, a substantially rigid cup portion having a bottom portion and an upright side wall and having a hole for inserting the stem, and the upper end of the side wall means is the tubular dome. Nori Crimped against grayed portion, the upper end of the liner constitutes a valve assembly comprising sandwiched between the ring portion and the cup portion.

Another aspect of the present invention is to provide a fluid distribution assembly for a self-pressurizing container that includes a radially inflatable liner and an elastic sleeve that flexes the liner as described above.

Another feature of the present invention is to provide a method for manufacturing the self-pressurizing container, which comprises the following steps.

That is, (a) a moldable material is formed by molding, one end is open and the other end is closed, upper side wall means is provided near the opening end, and the upper side wall means extends to the closed end. And (b) an inner diameter slightly smaller than the outer diameter of the liner, the flexible liner being formed by a plurality of convoluted portions that are regularly extended and are provided at regular intervals;
Inserting the liner into an elastic sleeve configured to have an axial length shorter than that of the liner such that at least a portion of the side wall means of the liner projects from the sleeve; An annular rigid dome having a ring surrounding the central hole is disposed so as to abut the outer surface of the neck portion; (d) a valve assembly including a metal cup having a bottom portion and an upright side wall is prepared, and the side wall is provided. Are abutted against the inner surface of the neck of the liner; (e) the upper end of the side wall is crimped against the ring and the upper end of the liner is clamped between them; (f) the remaining The container is formed by assembling the outer frame components.

Brief Description of the Drawings In the drawings: Figure 1 is a side view of a container according to the present invention with a partial vertical cross-section added.

FIG. 2 is a side view of the liner of the present invention in a normal or collapsed state.

FIG. 2A is a partial side view showing an improved embodiment of the liner of the present invention.

FIG. 3 is a side view of the liner of the present invention in an expanded state.

FIG. 4 is a cross-sectional view of the liner of the present invention taken along the line 4-4 of FIG. 2 in a folded state.

Figure 5 is a cross-sectional view of the liner of the present invention in the expanded state taken along line 5-5 in Figure 3.

FIG. 6 is a side view of the fluid distribution assembly (that is, the liner / sleeve assembly) and a partial vertical cross-sectional view of the sub-assembly constituting the dome.

FIG. 7 is a partial cross-sectional side view showing a state in the latter half of the assembling process with respect to a part of the sub-assembly shown in FIG. 6.

FIG. 8 is a longitudinal sectional view taken along the line 8-8 in FIG.
The details of the connection between the dome, the liner and the valve assembly of the present invention are enlarged and not based on exact dimensions.

BEST MODE FOR CARRYING OUT THE INVENTION The best mode and preferred embodiments of the present invention will be described in detail below.

FIG. 1 shows the entire container according to the present invention. According to FIG. 1, the container 10 constitutes a self-pressurizing container for spraying a fluid substance, and includes a telescopic liner 14 having a bellows body portion.
12; an elastic sleeve 16 that tightly surrounds the main part of the liner; an outer frame composed of an annular dome 18, a cylindrical side wall or cylindrical outer frame 20, and a bottom wall 22; a cup 26, a valve (Fig. (Not shown), an upright tube stem 28 for discharging fluid product from the liner 14, a collar 29 surrounding the bottom of the stem 28 just above the cup 26, a valve 30 (shown in FIG. 8) and optional And a valve assembly 24 consisting of a cap 31 (shown in phantom). The valve 30 may be a conventional spring-pressing type reciprocating valve similar to that used for an aerosol container.

In FIG. 1, the liner 14 and the sleeve 16 are set in the normal position. That is, the case where the liner 14 is empty. When the liner 14 is pressurized and filled with the product material to be sprayed, the sleeve 16 has the shape shown by the broken line.

The above liner 14 will be described in detail with particular reference to FIGS. Referring first to FIG. 2, the liner 14 is made of a slender, substantially cylindrical, radially expandable flexible plastic product, and has one end (ie, upper end) opened and the other end (ie, lower end) closed. An upper side wall means (that is, an upper portion) is provided in the vicinity of the opening end, and an elongated regular convolution portion 34 extending from the upper side wall means to the closed end is provided. The lower portion of the fold 34 tapers inwardly, so that the liner 14 eventually forms a blunt or rounded head 36 at its closed end.

The upper side wall means 32 of the liner 14 has no bellows and a frustoconical flange 38 at its open end.
And a pair of cylindrical portions 40, 42 having a center on the same axis, and a truncated cone-shaped intermediate portion 44 connecting these cylindrical portions 40, 42, the former of the cylindrical portions 40, 42. Cylindrical part
The diameter of 40 is larger than that of the latter, and is closer to the opening end side. In the comparatively small cylindrical portion 42, as shown in FIG.
A bead 46 can also be provided. However, for the purpose of improving the frictional engagement between the liner 14 and the sleeve 16, the bead 46 is not always necessary.
It is not necessary and can be omitted. The cylindrical portion 42
May have a very short axial length or may be omitted altogether. Thereby, the frustoconical portion
The 44 can be brought close to the upper end of the folding section 34.

The fold 34 comprises a plurality of vertically extending bellows or folds 48, as best seen in FIG. These folding parts 48 are formed by alternately forming mountain parts 50 and valley parts 52. The peaks and valleys are wrinkled to form a bellows for permanent processing. The peaks and valleys (except for these ends) form a pair of concentric right circular cylinders. The mountain portion tapers toward the upper side wall means 32 at the upper end of the folding portion 34. On the other hand, the valley may or may not be tapered at the upper end of the folding portion 34. Both peaks and valleys are the tip of the bottom edge
It is tapered toward 36. Therefore, most of the folding portion 34 (except the upper end and the lower end thereof) has a cylindrical shape, and its diameter is constant.

The cylindrical portion of the folding portion 34 occupies most of the entire length of the liner 14. When the liner 14 is in normal condition,
In other words, empty state (that is, no pressure)
At this time, the maximum outer shape of the folding portion 48 can be understood with reference to FIG. In FIG. 3, the liner 14 is inflated,
In other words, the profile of the fold 48 is shown in the pressurized state (ie when the product to be spread is filled).

The depth of the folding portion 48 is constant in the cylindrical middle portion of the folding portion 34. At a constant end of the folding part 34, the folding part 48 approaches the upper side wall means (that is, the upper end side of the folding part) or the tip part (that is, the lower end side of the folding part) 48.
The depth of is decreasing. Therefore, in order to obtain a predetermined circular inner diameter (that is, the diameter of the circle for connecting the valleys), the depth of the folded portion should be larger at the lower end than at the upper end of the folded portion. Is. This is believed to be effective in releasing the spray product from liner 14 almost completely, as will be discussed in more detail below.

In the embodiment, the folding portion 34 has a substantially cylindrical shape, but other shapes may be, for example, an elliptical shape or a spherical shape. In any case, the preferred shape is that it constitutes a folding surface, and in any case the folding part is provided with a plurality of longitudinally extending regular folding parts, which are permanently machined. It is to be a bellows.

The liner 14 is made of a flexible plastic material and may or may not have elastic polymerizing properties. Preferred materials include high density polyethylene (HDPE), other polyamides and acrylonitrile named "Barex" 218 available from British Petroleum. The liner 14 is a self-supporting member and therefore cannot be glued together with any other part or component of the container 10.
Also, the liner is flexible over its entire length.

The liner may be of any suitable thickness, for example 10-20 mils (0.01
It is sufficient if the thickness is 0 to 0.020 inch), and preferably,
A thickness of 0.012 to 0.018 inch is good. Except for the taper near the tip 36, the liner should have a nearly constant thickness over its entire length (if the maximum and minimum thickness error is subtle 0.004 inches). Good.). Even if the liner itself is made of an inelastic material, it can be radially expanded due to the effect of the folded portion 48. When the fluid is contained in the liner while being pressurized, the liner expands and assumes the shape shown in FIGS. 3 and 5. As can be seen from FIG. 5, the expanded liner has a substantially circular circumference and shape. Incidentally, FIG. 4 and FIG.
Note that the figures are not based on the same scale. FIG. 4 is twice the scale of FIG.
Thus, in FIG. 5 the liner 14 of the present invention is shown inflated below its actual dimensions (1.75 inch diameter), while in FIG. It has been doubled. In other words, the outer diameter of the liner in the folded state (measured from the distance between two diametrically opposite peaks 50) is about one half of the diameter in the expanded state.

The liner may be formed by conventional plastic molding techniques, preferably blow molding. Second
As shown in FIGS. 4 and 5, the liner is molded in a folded state. The material of the liner has a memory effect, and when pressure or other stress is not generated, the liner naturally returns to the folded state shown in FIG. This point is important in giving the maximum effect to the liner in the sense that almost all the product in the liner 14 is released.

Cylindrical elastic sleeve 16 provides the energy needed to disperse the product from the liner, within which liner 14 is installed. The sleeve 16 is made of a tube whose both ends are open. When the liner 14 is pressed to fill the product, the sleeve 16 stores energy, and when the product is sprayed from the liner 14, the energy is released. . Therefore, the wall thickness of the sleeve 16 must be sufficient for this purpose. The sleeve 16 is in the form of a tube having a constant diameter throughout its length when stress is not present. The inner diameter of the unstressed sleeve 16 is slightly smaller than the outer diameter of the folded liner (the folded liner
The outer diameter of 14 is a diameter obtained by measuring the distance between two facing peaks on the diameter. ). Liner 14 in this sleeve
When the is inserted, the diameter of the sleeve is expanded slightly larger than the entire length of the diameter shown in FIG. The axial length of the sleeve 16 is shorter than that of the liner 14. Thus, when the liner upper sidewall means 32 projects from one end of the sleeve 16 and no pressure is applied to such liner / sleeve assembly 12, the liner's tapered lower end (tip 36
The vicinity) also projects from the other end of the sleeve 16. Then, when the liner 14 is filled with the product under pressure, the sleeve 16
Expands radially, becomes longer in the axial direction, and has the outer shape shown by the broken line in FIG. When the liner 14 and the sleeve 16 expand in this way, as shown in FIG.
The lower end of the is slightly beyond the tip 36 of the liner 14. Accordingly, the length of sleeve 16 should be at least about 25 percent longer in the pressurized and inflated condition than in the normal or relaxed condition. This time,
The liner 14 should have an aspect ratio (ie, a ratio of length to diameter in the expanded state of the liner) of at least 3. Usually the liner capacity is 12 ounces (liner aspect ratio when under 340 grams),
It will be at least 3. If the container is large, the aspect ratio is 3
It is often done less than.

A preferred elastic material for the sleeve 16 is synthetic rubber, especially Natsyn rubber. Natchin gum consists of cis-1,4-polyisoprene. As a characteristic of this nutchin rubber, it is desired that a high pressure can be maintained per 1 gram of the material.

In addition, nutchin rubber has relatively less "dieswell" than most other rubbers and is significantly lower than the natural rubber die swell. Rubber generally has the property of expanding in size when removed from the mold, and "die swell" is a measure of the degree of expansion of such rubber. Nutchin rubber also has the property of expanding in the longitudinal direction and expanding radially when pressed. Therefore,
The material from which the sleeve 16 is formed must have the property of expanding longitudinally and simultaneously expanding radially when pressed. The required lengthwise extension ratio varies somewhat depending on the aspect ratio of the sleeve 16, as described above. here,
As shown in FIG. 1, when the product is filled and sprayed, some relative movement occurs in the longitudinal direction between the sleeve and the liner, and therefore, the elastomer that forms the liner 16 as will be understood by those skilled in the art. It is desirable to add a lubricant to the composition.

Although the dome 18 has an annular shape in FIG. 7, it may have a bell shape as shown in the drawing. The dome is provided with a central hole, a ring portion 56 is provided around the central hole, and a lip portion is provided around the periphery or outer end of the dome.
58 extends and the lip forms a locking device for fitting the outer frame. The shape of the dome 18 may be substantially the same as the dome of a conventional aerosol container, but in any case, as will be described later, it generally has sufficient strength and elasticity, and as a result, the outer end or lip of the cup portion 26 is formed. It is preferable to be able to easily bend and crimp along the ring portion 56.

FIG. 8 shows the upper assembly 60 of the container 10 according to the invention, in a partially cutaway and partially enlarged scale. As described above, the dome 18 is provided with the central hole, and the ring 56 is extended around the central hole. The cup portion 26 has a disk-shaped bottom portion 62 having a flat circular shape and having a central hole for the spraying stem 28 and the collar 29, and an upright side wall 64 forming a folding surface. A rim 66 is formed on the upper end (or outer end) of the side wall 64. The upper end of the side wall 64 or the rim 66 is crimped to the ring portion 56, and thus, between the crimped portion 66 of the crimped upper side wall 64 and the ring portion 56 of the dome 18, the upper side wall of the liner 14 is provided. The upper part of the means 32 is fastened. This allows the upper end or open end of the liner 14 to be fluidly closed. The cup portion 26, the stem 28, the collar 29 and the valve 30 are integrally formed to form the valve assembly 24.

The overall shape of the upper assembly 60 in the container 10, with the exception of the liner 14 and including the valve assembly, is exactly the same as that of conventional aerosol containers. However, it is different in that the outer end of the outer frame is fitted to an outer frame made of a non-metallic material and the outer frame is fixed. That is, the upper assembly described in this description is quite different from that shown in the above-mentioned US Pat. Nos. 4,837,833 and 4,423,829.

According to the present invention, a container can is assembled as follows.

First, the liner in the normal folded state as shown in FIG. 2 is inserted into the sleeve 16 and, in its normal state, the fluid distribution assembly (that is, the liner / sleeve assembly) as shown in FIG. Form 12
The upper end of sleeve 16 flexes over the upper portion of liner 14, but preferably overlaps cylindrical portion 42 for frictional engagement. Tapered bottom 36 of liner 14 has an adjacent sleeve
Extend longer than 16 ends. The holding ring 46 (when used) has an effect of holding the liner in the sleeve by holding the portion near the upper end of the sleeve 16. However, in the normal case, the sleeve 16 and the upper side wall means of the liner
A frictional engagement with 32 (particularly this cylindrical portion 42) is sufficient and does not require ring 46.

Next, the dome 18 is installed. As the installation method, the end of the liner 14 on the side of the closed end 36 in the above liner / sleeve assembly is first inserted into the central hole of the dome 18. Then, as shown in FIG. 6, the ring portion 56 engages the larger cylindrical portion 40 of the neck portion 32 of the liner 14. The outer diameter of this cylindrical portion 40 is
The diameter is approximately the same as the diameter of the central hole of the dome 18. The liner / sleeve assembly 12 is then pulled to bring the ring 56 into contact with the liner 14 flange.

As a third step, the valve assembly having the side wall 64 (not crimped at this stage) of the cup portion 26 is installed. At this time, the upper end of the side wall 64 of the cup portion or the rim is substantially aligned with the flange 38. Then, the upper portion of the side wall 64 of the cup portion is bent so that the ring portion 56 of the dome 18 is folded.
The upper part of the liner 14 (the flange part) between the cup side wall 64 and the dome ring part 56 while being bent and crimped to
38 and cylindrical portion 40 are included). During the bending and pressure-bonding process, the upper portion of the cup side wall 64 is formed as the lip 66.

And as the final step, the outer frame or side wall 20 and bottom wall 22
(These should be pre-assembled) and the remaining outer frame components are combined. It may be assembled by conventional means. Alternatively, as another method, the side wall 20
The bottom wall 22 may be previously combined with the dome 18. In this case, the entire assembly shown in FIG. 6, namely the liner / sleeve assembly 12 and the upper assembly.
60, the dome 18 and the valve assembly will be inserted into the outer frame assembly which can be prepared in advance.

Then, in order to fill the fluid product in the container 10 according to the present invention, the fluid product is fed under pressure by a pump or the like, supplied into the liner 14 via the stem 20, and the fluid product is continuously pumped, Inflate the liner to the position shown in FIG. This liner 14 and sleeve at the same time
16 also expands radially. At this time, it is normally separated from the lower part of the liner 14 (for example, the upper part of the sleeve 16) and the folding part 34.
The portion just above the tapered lower part of the) begins to expand radially. The sleeve 16 also extends axially longer as the filling of the liner 14 progresses. Here, at the upper part of the sleeve, there is no slippage between the sleeve and the liner, but at other parts of the sleeve, longitudinal extension occurs. On the other hand, regarding the length of the liner 14,
The length remains substantially the same regardless of the folding (Fig. 2) or expansion (Fig. 3) of the. The sleeve 16 stores energy when it expands. When such a liner / sleeve assembly 12 is fully expanded (and during expansion), the fluid product causes stress on the sleeve 16. However, since the liner 14 produces little stress, it can withstand the pressurization of the contained fluid product despite its thinness.

When it is desired to spray the product from the container 10, the valve 30 may be opened by a conventional method such as tilting or pressing the stem 28. On the other hand, if you want to stop the product application, you can release the stem 28 and return it to the upright position. In this case, the valve closes and the outflow of product stops. This operation can be continued until the product runs out. The motive force for spraying the product is given by the energy stored in the sleeve 16. As the product is spread, the liner 14 and the sleeve 16 gradually return to the initial shape (stress-free shape) shown in FIG. 6, and when almost all of the product is sprayed, a sharp initial shape is reached. In addition, in the process of returning such a liner / sleeve assembly to the normal position, the upper end of the sleeve 16 is bent around the upper part of the liner 14 in a fixed position.
The pressure curve of the sleeve 16 at this portion (i.e., the percentage of radial expansion to pressure or the percentage of longitudinal extension to pressure) is almost flat.

It is also possible to apply the product almost completely.
The reason is that the liner 14 returns to the folded position shown in FIGS. 2 and 4 due to the memory effect, and further, the liner sleeve assembly is almost in the normal position (6th position).
This is because the sleeve 16 still has sufficient stored energy as the product is released and emptied.

Therefore, the container of the present invention has various advantages over conventional aerosol containers. That is, first, no propellant is needed. Therefore, the safety issues and environmental pollution associated with aerosol propellants are eliminated. Second, the product is filled and stored under lower pressure than conventional aerosol containers. Therefore, the cost of the safety device and insurance can be reduced, so that the cost of the container of the present invention is lower than that of the aerosol container. Similarly, insurance during transportation can be reduced. Finally, the container of the invention can be incinerated in a safe manner. That is, since it is possible to carry out a catastrophic disposition in the actual atmospheric pressure,
There is no explosion and no toxic fuel. Furthermore, the container of the present invention can be refilled any number of times, can be reused and the components can be recycled. Further, as in the conventional self-pressurizing container such as the above-mentioned Venus patent and Katz patent, the connecting portion between the valve assembly and the liner is fluidly adhered. According to the present invention, there is an advantage that the material of the liner is not limited. Due to the use of standard aerosol valves, the combinations of valves and spray head designs are very diverse.

While the best mode and preferred embodiment of the present invention have been described above, the description in the present specification is not limited to what is shown in the drawings.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Office reference number FI technical display location B65D 83/42 83/58 83/76

Claims (14)

[Claims] 1. A self-pressurizing container, which comprises (a) a liner / sleeve assembly, wherein the liner / sleeve assembly has (1) one end open and the other end closed so that no stress occurs. In the state, it has a sufficient thickness to have a self-supporting ability, has upper side wall means near the open end, and extends a plurality of folding parts extending in the longitudinal direction from the neck part toward the closed end. The opening end is provided with a flange portion that bends outward, and the total length is about 0.01 excluding or including the vicinity of the closing end.
A plastic liner having a substantially constant wall thickness in the range of 0 inch to about 0.020 inch and having flexibility that is elongated and substantially cylindrical and radially expandable; (2) at least both ends are open, The main part of the liner is tightly enclosed and bent, and the normal inner diameter is slightly smaller than the outer diameter of the liner in the folded state without interposing components between the main part and the axial direction. Of a substantially cylindrical shape that is capable of free extension and is configured so that its axial length is at least about 25% longer when under pressure than when under pressure. Consisting of an elastic sleeve: (b) consisting of a side wall and a generally rigid annular dome,
The dome constitutes an outer frame having a central hole and a ring portion surrounding the central hole; (c) a valve for spraying a fluid substance from the inside of the plastic liner, and a standing side wall. A cup portion having rigidity and a longitudinal tubular stem for discharging the fluid, wherein an upper portion of a side wall of the cup portion and the flange portion are bent and crimped to the ring portion of the dome. A self-pressurizing container, which comprises a valve assembly in which the open ends of the liner are sandwiched between them. 2. The container according to claim 1, wherein the cup portion and the dome are made of metal. 3. The container according to claim 1, wherein the liner is non-elastic. 4. The liner is formed in a folded state, the folding part is present at this time, and the liner has a memory function, and when the stress is eliminated, the liner is made to A configuration for returning to a folded state, wherein the folding portion forms a mountain portion and a valley portion, and wrinkles are formed as a permanent bellows in each mountain portion and the valley portion. Item 1 container. 5. The sleeve according to claim 1, wherein a normal axial length of the sleeve is shorter than that of the liner, and an axial length of the sleeve when expanded is longer than that of the liner. container. 6. The folding part is formed with a substantially cylindrical intermediate part which occupies more than half of the total length, and a tapered bottom part which is provided near the closed end and is located below the intermediate part. The upper side wall means and the substantially cylindrical portion are
The container of Claim 1 having a generally constant wall thickness in the range of 0.010 inch to about 0.020 inch. 7. A fluid spraying assembly for a self-pressurizing container, comprising: (a) one end opened and the other end closed, and having a wall thickness sufficient to have a self-supporting ability in a state where no stress is generated. And a regular folding part formed by extending a plurality of folding parts extending in the longitudinal direction from the upper side wall device toward the closed end, while having the upper side wall device near the opening end, A flange portion that bends outward is provided at the opening end, and has a substantially constant wall thickness in the range of about 0.010 inch to about 0.020 inch over the entire length excluding or including the vicinity of the closed end, and is elongated. And (b) a plastic liner having a substantially cylindrical and radially inflatable flexibility; and (b) both ends of which are open and at least a main part of the liner is tightly surrounded and bent, and a component between the liner and Fold without intervening The inner diameter of the liner is slightly smaller than the outer diameter of the liner, and it can freely extend in the axial direction. A fluid distribution assembly for a self-pressurizing container, comprising a substantially cylindrical elastic sleeve configured to be at least about 25% longer when in the open position. 8. The liner is formed in a folded state, the folding portion is present at this time, and the liner has a memory function, whereby when the stress is released, the liner is A container according to claim 7, wherein the container is configured to return to a foldable folded state. 9. The container according to claim 7, wherein the normal inside diameter of the sleeve is slightly smaller than the expanded diameter of the liner. 10. The container of claim 8 wherein said liner is non-elastic. 11. The container of claim 8 wherein said fluid distribution assembly generally comprises said liner and said sleeve. 12. The folding part has a substantially cylindrical intermediate part, and a tapered bottom part provided near the closed end and located below the intermediate part. The upper side wall means. And the substantially cylindrical portion is about 0.0101 inch to about
A container according to claim 7 having a generally constant wall thickness in the range of 0.020 inches. 13. A method of manufacturing a self-pressurizing container, comprising: (a) molding a moldable material having substantially the same wall thickness, one end being open and the other end being closed. A liner having an elongated and substantially cylindrical shape and having a self-supporting ability and flexibility is formed, and by such molding, upper side wall means is provided near the opening end of the liner, and the liner is externally provided at the opening end. It is provided with a flange bent toward one side, and further, a regular folding part is formed, and in this folding part, a plurality of folding parts extending in the longitudinal direction from the upper side wall means toward the closed end are formed. And, by such molding, the liner itself has a generally constant wall thickness in the range of about 0.010 inch to about 0.020 inch over its entire length, except for or near the closed end thereof. The inner diameter is smaller than the outer diameter of the liner in a folded state and the axial length is shorter than that of the liner, the axial length is freely extendable, and the axial length is increased in a pressurized state. The liner is inserted into an elastic sleeve that is at least about 25% longer than in the unpressurized state, during which the liner and sleeve are unpressurized such that the upper side wall means and the closed end of the liner are above the sleeve. (C) installing a generally rigid annular dome having a central hole and a ring portion surrounding the central hole so that the ring portion abuts the outer surface of the upper side wall means; A) a valve assembly comprising a metal cup portion having a bottom and upstanding side wall means is installed such that the cup portion abuts the inner surface of the upper side wall means of the liner; The upper end of the upper side wall means in the cup part is bent and crimped to the ring part, and the upper side wall means of the liner film is sandwiched between them, thereby forming a sealing material, and the cup part and the liner. (F) A method for manufacturing a self-pressurizing container, which comprises forming a seal for preventing fluid outflow between them, and (f) assembling the remaining outer frame components to form the container. 14. The folding part has a substantially cylindrical middle part, and a tapered bottom part provided near the closed end and located below the middle part. The upper side wall means. And the substantially cylindrical portion is about 0.0101 inch to about
14. The container of claim 13 having a generally constant wall thickness in the range of 0.020 inches.