MXPA99010594A - Valve for dispensing a pressurized liquid, container fitted with this valve, and method of packing a container thus equipped - Google Patents

Abstract

A valve is fitted to a reservoir containing a pressurized product. The valve has a valve body made of an elastomeric material and an activation element for, in response to an actuation command, causing the valve to move from a closed position into a position which allows the product to be dispensed. The valve body includes a first mounting device to allow the valve to be mounted in a first position in which the valve body defines, with an edge of an opening in the reservoir, at least one passage communicating with the reservoir, so as to allow the reservoir to be filled with a propellent gas. A second mounting device allows the valve to be mounted in a second position in which the valve body is mounted in a sealed fashion on the edge of the opening in the reservoir. A container fitted with this valve and a method of packing it are also disclosed.

Description

"VALVE FOR THE DISTRIBUTION OF A PRESSURE LIQUID, CONTAINER EQUIPPED WITH THIS VALVE AND PACKAGING PROCEDURE IN AN EQUIPPED LIQUID CONTAINER" DESCRIPTION OF THE INVENTION The present invention relates to a distribution valve of a product, in particular liquid, to a container intended to contain this product and equipped with this valve, as well as a pressure packaging process in said container under the action of a propellant gas. More particularly, the valve according to the invention is designed to simplify its assembly on such a container and to facilitate, from the industrial point of view, the pressure setting. Such a container, commonly referred to as an aerosol dispenser, is primarily intended for the packaging and distribution of a fluid product, such as a cosmetic, dermatological, household, food or shop product, such as, for example, a lacquer or a lacquer. capillary foam, a spray- disinfectant, a lubri_ cante spray, a paint or a cleaning product. The valve that equips this kind of aerosol containers comprises a driving rod arranged axially in a valve body. The actuator rod presents a step for the product to be distributed. The valve comprises sealing means, apt to close said passage. The drive rod can move elastically. by lateral tilting of the rod, in the valve body, between a first position of sealing the passage, in which the rod occupies a position in which the passage of the product under pressure is sealed by the sealing means, and a second opening position. In this second position, the stem is tilted in relation to the geometrical axis - REF .: 31916 of the valve body, this step being in communication with the product under pressure, to allow the distribution of the product. The valve further comprises elastic traction means, which apply the rod to said first position. On the other hand, the opening of the valve can also be caused by axial pressure, which is of interest to fill the container in a packaging chain. Generally, the packaging of an aerosol product is effected in the following way through the open orifice of a container, the product to be dispensed, usually liquid, is introduced, and then the container is closed by crimping a valve holder bowl equipped with a valve. When the product is put under pressure, an appropriate supply of propellant gas is injected through the valve stem, keeping it in an inserted position. A valve of the aforementioned type is described in the patent application EP-A-0850851, in the name of the applicant. In practice, such valve type works satisfactorily. However, the applicant has proven that a distributor equipped with such a valve presents a drawback: that the speed of filling with the propellant in an industrial packaging equipment is less than desirable. The applicant has therefore sought a solution to make quicker and more comfortable the placing under pressure of an aerosol container, in particular on an automatic packaging chain. The present invention aims to solve the drawbacks of the valve described in EP-A-0850851, while proposing a valve of simple construction and easy to fix on all types of containers under pressure. In addition, the cost of the valve provided by the invention should be advantageous. The invention thus relates to a distribution valve, intended to equip a container containing a pressurized product by means of a high-pressure gas, which contains a valve body made of elastomeric material, and an activation means for, in response to a drive, pass the valve from a closed position to a position that allows product distribution by an outlet passage of said valve body, leaving said valve, in the absence of actuation, forced to assume the closed position, said valve body comprising first mounting means to allow the assembly of the valve in a first position, in which the valve body defines with an edge of the container, at least one passage in communication with the container, to allow the container to be filled with propellant gas, and a second mounting means, to allow assembly -of the valve, in a second position, in which mounts the body of váj. Vula in a sealed manner on said edge of the container. According to an interesting aspect of the invention, the first and second mounting means are arranged in such a way that, in the first position, the valve is located at a first axial height with respect to the container, and that said valve is in said position. second position, disposed in a second axial height relative to the container. Thus, by a simple axial displacement of the valve on the container, after filling with the propellant gas, it can pass from the first to the second position. For this purpose, advantageously, the valve body has a suitable profile, after the container is filled with propellant gas, in order to favor the passage of the valve from the first position to the second one. Thus, according to an advantageous embodiment, the first and second mounting means are arranged on the valve body at different axial heights, the first mounting means being disposed between the second mounting means and a lower end. of the valve body, said valve body having between said first and second means, a decreasing section in the direction of the first means. The second mounting means may be formed, for example, by an annular groove, formed on the outer surface of the valve body, capable of cooperating, in a sealed manner, with a corresponding edge of the container, for example with the edge of an orifice. practiced at the top of the container. The containers which can be used for the assembly of this valve can be chosen from commonly used containers, for example aluminum, tin or plastic bids, which have a generally cylindrical shape. For this purpose, the container can have an open end, a free edge from which delimits an orifice, able to cooperate directly with the mounting means of the valve body. As an alternative, the container may be provided with a bowl crimped on the container provided with said hole, in which it adjusts the valve body. For the embodiment of the valve body, it is possible to provide any elastomeric material having a Shore A hardness comprised between 30 and 70, for example natural or synthetic rubbers, particularly thermoplastic or vulcanizable elastomers. Thus, the elasticity of the constituent material of the valve body ensures, on the one hand, the necessary deformation to the mounting thereof on the container, in the first position and its passage to the second position. On the other hand, the elasticity of this material also ensures a sufficient tightness in the second position, to resist the internal pressure of the container. As for the first mounting means, they can also be formed by an annular groove, formed on the outer surface of the valve body and able to cooperate with the corresponding edge of the receiver, said groove being interrupted by at least one passage formed on the outside of the valve body and that will open into the interior of the recirculator, said step being of a depth greater than the depth of dj. cha throat. Advantageously, this passage will be oriented substantially perpendicular to said throat. In this case, advantageously, the first and second mounting means are able to cooperate by snap-fitting with said edge of the receiver. According to another aspect of the invention, the valve can be a valve whose opening is ensured by lateral tilting of a driving rod crossed by said outlet passage, constituting the activation means, which rod will be mounted in an outlet channel, formed in the interior of the body of the valve. valve, leading to an internal chamber. According to a particular aspect of the invention, in this case, the outlet channel has a longitudinal axis, the valve rod being provided inside the outlet channel of a profile able to cooperate with a complementary profile of the outlet channel, to define an articulation sensibly around a determined point, so that whatever the angular position of the rod with respect to the longitudinal axis, said rod remains in annular tight contact with the channel. According to a preferred embodiment, the rod has on the inside of the outlet channel, an annular portion that projects from the rest of the rod, being a cross section thereof spherical and having a geometric center, having the outlet channel a portion forming reinforcement, of a configuration complementary to the shape of the sapient portion, and apt to receive, in a sealed manner, said projecting portion, coinciding. giving the point of articulation of the rod sensibly with the geo-metric center. The activation means, for selectively communicating the internal valve chamber with the outside of the valve, advantageously comprise a sealing ring, integral with the rod, requested by elastic traction means, sealingly supported on an annular seat. formed by said body. According to one embodiment, the outlet passage of the rod opens into the internal valve chamber by means of a passage that passes radially through the stem and is located at the level of the sealing ring. As regards the embodiment of the rod and the sealing ring, it will be advantageous to use a rigid thermoplastic material, such as polypropylene or polyoxymethylene (POM). According to another aspect of the invention, the elastic traction means are constituted by at least one elastomeric seat supported by an internal wall of the valve chamber and integral with it, resting this seat or these seats elastically against a part of the stem. -which supports the sealing ring. A valve comprising this kind of pulling means has been described, for example, in the European patent application EP-A-0850851, cited. Another object of the invention is constituted by a container for the distribution under pressure of a pressurized product by means of a propellant gas, container equipped with a valve as defined above. According to a preferred embodiment of the invention, this valve is mounted on the container by means of a bowl having an abutment, an inner edge of which is intended to be adjusted with said first or second means for mounting the valve. In this case, advantageously, the bowl is crimped onto the container. Still another object of the invention is a method of pressurizing a product into a container having an opening delimited by an edge and in which the previously defined valve is mounted, said method consisting of: a) introducing into the container the product that is to be distributed; b) placing the valve in a filling position, in which said edge of the container will be in adjustment with first mounting means of the body of said valve, these first mounting means being suitable, in said loading position, to delimit with said edge of the container, one or several communication steps with the container; c) through said step or of said steps, introduce propellant gas into the interior of the container; and d) moving the valve with respect to the container to place it in a distribution position, in which said edge of the container is adjusted with the second mounting means of the valve body, these second mounting means being suitable in said position of distribution, to cooperate with said edge of the container, in order to ensure a tight assembly of the valve body on the container. Generally, the product is introduced through the opening of the container used to assemble the valve. When the valve is mounted on the container, advantageously, the passage from the valve from the loading position to the dispensing position is effected by axially displacing the valve relative to the container. This way of proceeding greatly facilitates the automation of the loading of the deposit in a packaging chain. According to a particularly advantageous embodiment, in the loading position of the valve, a plurality of steps, of regular size, are arranged all around the valve body, the filling of the container being carried out with gas covering the valve by means of a gas inlet duct, which will have a suitable edge to enter watertight contact around the valve with a surface of the container. Generally, this surface of the container is part of a valve-holder bowl mounted on the container, which will have an opening, whose edge will be able to cooperate with the first and second valve mounting means. The valve that is described has other advantages, in relation to a conventional valve. In fact, when the valve body is made with an elastomeric material, said valve body is given sufficient elasticity to be able to directly mount the maneuvering rod in the valve body, without it being necessary to assemble several parts. On the other hand, when the traction means are made under the form of contact seats supported by one of the walls that delimit the inner chamber, these seats can be deformed by crushing, when the valve is actuated. In this way, it is possible to avoid resorting to a metal tensile resistor capable of coming into contact with the product that it is trying to distribute, with the possible risk of degrading the product. Other aspects of the invention will appear in the reading of the detailed description of an embodiment of the present invention, which will be described below by way of purely illustrative example and in no way restrictive, represented in the attached drawings, in these drawings: Figure 1 represents an axial sectional view of a valve according to the invention, mounted on a container in loading position; Figure 2 represents a side view on a larger scale of the body of the valve of figure 1; - Figure 3 represents an enlarged view, in axial section. of the activation means of the valve of figure 1; Figure 4 represents an axial sectional view of the valve of figure 1, mounted on a container in the final assembly position. The valve 1 according to the invention, shown in FIGS. 1 and 4, respectively in the loading position and in the watertight mounting position, is intended to equip a dispenser provided with a tank 3. The tank is intended to contain a product liquid, such as a capillary lacquer, putting the tank under pressure by the action of a propellant gas G.

As it is visible, in particular in figure 1, the valve 1 comprised of a body 2 having a central portion 2a in the form of a truncated cone of geometric axis of revolution A, and a maneuvering rod 11, of generally cylindrical shape, provided with an X axis. In the rest position of the valve, axes A and X are confused. The rod 11 is made in two parts 22 and 30 (see figure 3) with a thermoplastic and rigid material. pol ioximeti log (POM). The valve body 2 is made with an elastically deformable material, for example a nitrile rubber elastomer, whose Shore A hardness is advantageously comprised in the range between 30 and 70. The body comprises a larger base 2b and a minor base 2c, joined by the overall frustoconical portion 2a and a cylindrical portion 2d. Inside the valve body 2 there is arranged an inner chamber 4 of circular section, delimited by peripheral walls 4a, -4b, 4c, 4d. The wall 4a has a cylindrical shape and is connected to a frusto-conical portion 4b whose bottom is opened towards the reservoir 3 by an axial channel -of intake 5 of product P. The valve body 2, substantially one-third of its height (des the lower end of the valve body), has an annular groove 16 delimited in part by an annular impeller 15a. The position of the gargle 16 on the valve body is indicated by reference H .. The annular groove 16 is interrupted by several depressed areas 18, regularly distributed and generally in a number of 2 to 4. These zones form open steps, when the valve body is mounted in the opening 7 of the bowl 8, in the H. position, that is, in a position in which the edge of the opening 7 cooperates with the annular groove 16, said in others In this position, the steps 18 open on either side of the bowl 8. In this position, the reservoir can be filled with pro-gas G from the outside, through the steps 18. We must observe; var that the depth of each step 18 is greater than the depth of the throat 16. The annular groove 16 constitutes the first mounting means of the valve. The valve body comprises, between the cylindrical part 2d and the frusto-conical part 2a of the body 2, at a height H2, a few seconds mounting, carried out in the form of an annular groove 14. When the valve is assembled in the hole 7 of the bowl 8 in adjustment with the gargají ta 14, a perfect tightness is established between the bowl and the valve body. The axial intake channel 5, intended for the admission of the product to be distributed, is located in the center of the lower part 2b and opens into the chamber 4. This intake channel 5 is connected to a immersion tube 19 whose free end (not shown) is permanently immersed in the product, by a connection mouth 32 - supported by the second part of the actuating stem 11., on the side opposite the intake channel 5, the wall internal cylinder 4a of the valve body is joined to an annular sealing area 4c located in a plane perpendicular to the geometric axis A. The annular zone 4c is projected upwards by a second frustoconical portion 4d, facilitating the -blowling of the rod valve 11. The upper end of the frustoconical portion 4d opens into a reinforcement 13 of substantially spherical shape.

This reinforcement 13 forms part of an outlet channel 10, arranged in the extension of the intake channel 5, while, on the other hand, the channel? O communicates the internal chamber 4 with the outside. The outlet channel 10 is crossed by the first part 22 of the rod 11, leaving the external wall of the vast valve 11 in perfect sealing contact against the wall of the valve body delimiting the outlet channel 10. The rod 11 presents an annular portion 15 protruding from the rest of the rod, and whose axial cross-sectional section, is spherical in shape, complementary to that of the reinforcement 13, having a geometric center Q. As will be indicated later in the course of the description of the valve operation, the geometrical center Q constitutes a pivot point of the stem during valve actuation. As it is visible in figure 3, the first part 22 of the valve stem 11 comprises a central distribution channel 23 which passes through the vase from the emergent end 11a to a height situated substantially at the level of the annular zone 4c. At this height, the central channel 23 opens into a passage 25 that traverses the rod radially, reaching the upper part of the chamber 4. The first part 22 of the rod further comprises a cylindrical end 24, provided with a peripheral impeller 26. This impeller 26 is apt to cooperate with a complementary annular groove 33 made in the interior of a blind chimney 34, disposed on the upper end of the second part 30 of the valve stem. Thus, the two parts 22 and 30 of the valve stem can be assembled by pressure adjustment. The blind chimney 34 is surrounded by a cylindrical crown 9, of a larger diameter than the chimney 34 and of greater height. The free edge 9a of the crown has a chamfer, thus forming a more or less sharp edge, intended to rest on the annular area 4c of the chamber 4, thus forming a seat. On the opposite side of the crown 9, the second part comprises a cone-shaped portion 30a which is joined to the crown 9 by a cylindrical portion 30b and whose section decreases towards its lower end 30d. The frustoconical surface 30a of the valve rod comprises a plurality of grooves 30c, oriented in a plane passing through the geometric axis X. The lower end 30d of the frustoconical portion 30a is extended by the connection mouth 32 mentioned. In the region of connection between the frustoconical portion 30a and the connecting mouth 32, a passage 36 leading radially to the grooves 30c has been made. The center of the radial passage 36 opens into a suction channel 38, defined inside the mouthpiece 32, in communication with the immersion tube 19. The elastic support of the crown 9 against the seat 4c is ensured by several seats or protuberances 20 of small dimension, distributed regularly over the internal frusto-conical wall 4b of the valve chamber 4 and in resilient support against the frustoconical part 30a of the valve stem 11. Thus, in the valve rest position, the free edge 9a of the crown 9 enters a few tenths of a millimeter in the seat 4c and creates a perfect seal between the valve chamber and the distribution channel. On the other hand, the emerging part of the valve stem has a circular shoulder 29, which serves as a support for a tool, when the assembly of the rod in the valve body is effected. The assembly of valve 1 is simple. After the two rod parts 22 and 30 are assembled, this valve rod is inserted axially into the valve body through the outlet channel 10, in two successive steps, as will be seen below. The introduction of the rod into the valve body is favored, on the one hand, by the cocchico-comical portion 30c of the valve stem 11, and on the other hand, by the elasticity of the elastomeric material constituting the valve body 2. In the of the assembly, the axial travel of the valve rod 11 is limited by the circular shoulder 29 and said rod is correctly positioned in the valve chamber 4. It will be noted that, contrary to what happens with -certain ordinary valves, no ball is necessary neither no spring to ensure the operation of this valve. In order to package an aerosol product, according to the invention, it is introduced into the tank 3, on which it will be previously fixed, for example by crimping, the bowl 8, an appropriate quantity of product P. Within the opening 7 of the bowl 8, the valve is placed in the loading position H .. In this position, the edge 7 of the bowl fits with the throat 16. A delivery duct C of propellant gas is then placed, provided to drive a propellant gas G to the container , on the bowl, in an area 40 that surrounds the valve. The free end 38 of the charging duct C is apt to be located, in a sealed arrangement, over the bowl 8. Advantageously, in order to minimize the losses of propellant gas, the internal diameter of the charging duct C is determined slightly higher than the larger diameter of the valve body. An appropriate quantity of propellant gas G is then introduced into the interior of the container via the passages 18. Always in the presence of the propellant gas G in the charge duct C, the axial displacement of the valve body 2 in the direction of the container is caused. 3. For this purpose, it is possible to provide a mounting element (not shown), which is axially movable inside the loading duct and suitable for use with the vehicle. To be placed on the upper face 2b of the valve body and to push the latter towards the container. Advantageously, this assembly element is tubular, so that the emergent part 11a of the valve stem can be received in its hollow center. After the misalignment of the edge 7 of the bowl 8 of the groove 16, it is possible to slide said edge along the frustoconical part 2a of the valve body, thanks to the elastomeric material constituting the valve body. At the end of the translation thus effected, the edge of the bowl 7 ends up staying within the throat -14. At this time, the valve is fixed on the container stably and tightly, and the flow of propellant gas can be cut off. The advantages of the method of assembling and packaging a pressurized container, according to the invention, are the following: a high rate of pressurization is achieved in a packaging chain, not feasible with an ordinary valve; - the costs of assembling the valve on the container are reduced, since it is possible to dispense with the setting of the valve on the bowl; the costs of assembling the valve are in themselves advantageous in comparison with a conventional valve comprising a ball and a metal spring and requiring a supplementary mounting joint; - the number of constituent parts of the valve is reduced in relation to an ordinary valve. The operation of valve 1 will be explained below, with reference to the figure. In order to carry out the actuation of the valve 1, an inclination of the rod 11 with respect to the axis A is caused. This incision can be made in any radial direction with respect to the axis A, as symbolized in figure 4 with the arrows B. In this case, the axis X of the rod is inclined relative to the axis A of the valve body, the arc being formed between both axes typically of the order of 2 to 155. When this rotation takes place, a part of the crown 9 is separated of seat 4c. At the same time, the seat or seats 20 that are on the frusto-conical wall 4b, on the side opposite to the separation zone of the crown, are crushed by the frusto-conical part 30a of the stem. In the considered example, four seats 20 of elongated shape have been made, of approximate height of 1 mm, of approximate width of 1.5 mm and of lojí gitud approximate of 1,5 mm. Under the thrust of the propellant gas G, the product P is then routed to the chamber 4 via the immersion tube 19, the suction channel 38, the radial passage 36, the grooves 30c. Next, the product P is routed through the area separated from the crown 9 to the passage 25, to reach the distribution channel 23. When the rotation of the rod ceases, the distribution of the product stops, since the crown 9-returns to establish tight contact against the seat 4c. By rotating the valve stem in the outlet channel 10, the spherical portion 15 of the same ensures a perfectly tight annular contact with the valve body, at the level of all or part of the spherical portion of the reinforcement 13. Conventionally, the emerging end of the valve stem 11 fits into a drive member which also ensures the distribution of the product. It is thus possible to mount on the valve stem 11 a pushbutton provided with a dispensing orifice or with a distribution head (not shown), commonly used for this type of dispenser. It is noted that in relation to this date, the best method known by the applicant to carry out the aforementioned invention is that which is clear from the present description of the invention.

Claims (24)

1. REVINDIC ACTIONS Having described the invention as above, the content of the following claims is claimed as property: 1. Valve for equipping a container containing a pressurized product by means of a propellant gas, characterized in that it comprises a body of valve made with elastomeric material, and activation means for, in response to a drive, to pass the valve from a closed position to a position that allows the distribution of the product through an outlet passage of said valve body, said valve being, in the absence of a drive, forced to remain in a closed position, said valve body comprising first mounting means to allow the valve to be mounted in a first position, in which the valve body defines with a container edge at least one step in communication with the container, to allow filling the container -with s propeller, and second mounting means, to allow the valve to be assembled in a second position, in which the valve body is mounted in a sealed manner on said edge of the container.
2. 2. Valve according to claim 1, characterized in that the first and second mounting means are arranged in such a way that, in the first position, the valve is located according to a first axial height with respect to the container, said valve remaining, in said second position, disposed at a second axial height (H2) relative to the container.
3. 3. Valve according to claim 1 or 2, characterized in that the valve body has a suitable profile, after the container has been filled with propellant, to favor the passage of the valve from the first position to the second.
4. 4. Valve according to any of claims 1 to 3, characterized in that the first and second mounting means are arranged on the valve body, at different axial heights, the first mounting means being placed between the second means and a lower end of the valve body, said valve body having between said first and second means, a decreasing section • in the direction of the first means.
5. 5. Valve according to any of claims 1 to 4, characterized in that the second mounting means are formed by an annular groove formed on the outer surface of the valve body, and able to cooperate in a sealed manner with a corresponding edge of the container .
6. 6. Valve according to any of claims 1 to 5, characterized in that the first mounting means are constituted by an annular groove formed on the outer surface of the valve body and able to cooperate with a corresponding edge of the container, said throat interrupted by at least one passage formed on the outside of the valve body, and which empties into the interior of the container, depth greater than the depth of said throat.
7. A valve according to any of claims 1 to 6, characterized in that said first and second mounting means are able to cooperate by snap-fitting with said edge of the container.
8. 8. Valve according to any of claims 1 to 7, characterized in that said elastomeric material is constituted in particular by a thermoplastic elastomer.
9. 9. Valve according to one of the preceding claims, characterized in that said elastomeric material has a Shore A hardness comprised within the range of 30 to 70.
10. 10. Valve according to one of the preceding claims, end face because it functions by lateral tilting of a rod crossed through said exit passage, said rod forming said activation means and being mounted in a channel formed in the valve body.
11. 11. Valve according to the preceding claim, characterized -because the channel has a geometrical axis and the valve rod has a profile inside the channel, capable of cooperating with a complete profile of the channel to define an articulation substantially around a point, so that whatever the angular position of the rod - in relation to the geometric axis, said rod is in stationary annular contact with the channel.
12. 12. Distribution valve according to one of the preceding claims, characterized in that the rod has an annular portion that protrudes from the rest of the rod inside the channel, and is a spherical cross-section thereof, presenting a the geometrical center, the channel having a portion forming a reinforcement of configuration complementary to the shape of the projecting portion, and apt to receive, in a sealed manner, said projecting portion, the point of attachment of the rod coinciding substantially with the geometric center .
13. 13. Valve according to one of the preceding claims, characterized in that the activation means for selectively communicating an internal chamber with the outside of said valve, comprise a sealing ring, urged by elastic traction means, in support in a sealed manner on an annular seat formed by said body.
14. 14. Valve according to the preceding claim, characterized in that the outlet passage opens into the internal valve chamber by means of a passage that traverses the rod radially.
15. 15. Valve according to any of claims 13 or 14, characterized in that the rod and the crown are made of a rigid thermoplastic material.
16. 16. Valve according to one of claims 13 to 15, characterized in that the elastic traction means are constituted by at least one elastomeric seat supported by a wall of the chamber and solidj? the same, with this seat or these seats in elastic support, with a part supporting the crown.
17. 17. Container for the pressure distribution of a pressurized product by means of a propellant gas characterized in that it is equipped with a valve according to any of the preceding claims.
18. 18. Container according to claim 17, characterized in that the valve is mounted on the container by means of an inner bowl-one of which is adapted to be fitted with said first or second means for mounting the valve.
19. 19. Container according to claim 18, characterized in that said bowl is crimped on the container.
20. 20. Procedure for pressurizing a product in a container having an opening delimited by an eand in which a valve has been assembled, said method consisting of: a) introducing the product into the container; b) placing the valve in a loading position, in which the cited edge of the container is in adjustment with first mounting means of a body of said valve, said first mounting means being suitable in said position of load, to delimit said edge of the receiver at least one step in communication with the container; c) through said step or of said steps, introducing propulsive gas into the interior of the container; and d) displacing the valve with respect to the container, placing it in a distribution position, in which said edge of the container adjusts with a second mounting means of said valve body, said third means of assembly being in said position. of distribution, to cooperate with said edge of the container, in order to ensure a watertight assembly of the valve body on said container.
21. 21. Method according to claim 20, characterized in that the product is introduced through said opening.
22. 22. Method according to claim 20 or 21, characterized in that the passage from the loading position to the distribution position is effected by axially displacing the valve with respect to the container.
23. 23. Method according to any of claims 20 to 22, characterized in that said edge of the container is constituted by the inner edge of a bowl mounted on said container.
24. 24. Method according to any of claims 20 to 23, characterized in that in the loading position of the valve, a plurality of steps are arranged in a regular manner all around the valve body, charging the container with gas located on the valve body. the valve a gas inlet duct, a duct having an edge capable of establishing a tight contact all around the valve with a SJJ surface of the container.