WO2018073042A1

WO2018073042A1 - Device for dispensing a pressurised product, method and machine for assembling such a device

Info

Publication number: WO2018073042A1
Application number: PCT/EP2017/075750
Authority: WO
Inventors: Franck Flecheux
Original assignee: Franck Flecheux
Priority date: 2016-10-17
Filing date: 2017-10-10
Publication date: 2018-04-26
Also published as: FR3057645B1; FR3057645A1; EP3526138A1; EP3526138B1

Abstract

The invention relates to a device (1) for dispensing pressurised product (G) extending axially on an axis (X), the device (1) including: a storage housing (2) including a hollow body (20) filled with a pressurised product (G), an upper mounting opening (21) and a neck (3) connecting said hollow body (20) to said upper mounting opening (21), and a dispensing valve (4) including a cup (40) and a dispensing member (41), the cup (40) including a peripheral attachment crown (42) which is tilted towards the inside; the neck (3) including a seat portion (5), tilted towards the inside, which has a length of 0.5 mm to 5 mm in an axial cross-section plane, so as to form a seat; and a blocking portion (6) folded onto the upper surface of the attachment crown (42) so as to block the position thereof.

Description

PRESSURIZED PRODUCT DELIVERY DEVICE, METHOD AND MACHINE

ASSEMBLY OF SUCH A DEVICE

GENERAL TECHNICAL FIELD AND PRIOR ART

The present invention relates to the field of the distribution of pressurized products, in particular an aerosol for the distribution of cosmetic, food, medical, pharmaceutical, technical, etc. products. In general, an aerosol comprises a housing and a dispensing valve mounted on the housing. A seal is usually placed at the interface between the housing and the metering valve to prevent leakage. In order to close the storage box, the valve is sealed to the housing by a closing process known to those skilled in the art under the designation "dudonnage". Said closing process is known from the prior art, in particular in the standard definition document FEA 219, FEA 215 and FEA 226. A dewaxing process is complex and allows the products to interact with the gasket, which presents problems. disadvantages, in particular, for the distribution of pharmaceutical and other products. In order to eliminate the drawbacks of the prior art, with reference to FIG. 1, the applicant has proposed, by the patent application FR 1453384, a pressurized product dispensing device 101 comprising a valve 104 equipped with a valve member. distribution 141 and a cup 140 adapted to be fixed to a hollow body 102. According to this document, the cup 140 is flexible so as to be preloaded to the hollow body 102 of the dispensing device 101. In addition, the cup 140 has a radially inner portion in which is fixed said dispensing member 141 and a radially outer portion whose underside is convex.

During the tests, the Applicant has found that such a dispensing valve provides a quality closure while limiting the material required for closure compared to a conventional closure process by expansion. The invention proposes a new type of dispensing device whose closure has significant sealing qualities while being simple and inexpensive to manufacture. GENERAL PRESENTATION OF THE INVENTION

The invention relates to a pressurized product dispensing device extending axially along an axis X, the device comprising:

a storage case having a hollow body filled with pressurized product, an upper mounting aperture and a neck connecting said hollow body to said upper mounting aperture, and

a dispensing valve comprising a cup, defining an upper face and a lower face, adapted to be fixed to the storage box in order to close it and a dispensing member fixed to a radially inner portion of the cup, the cup comprising a crown device, forming the outer radial end of the cup, which is inclined inward, in a plane in axial section.

The invention is remarkable in that the neck comprises a portion of seat, inclined inwards, which has a length of between 0.5 mm and 5 mm in a plane in axial section, which cooperates by complementarity of shapes with the lower face of the fixing ring so as to form a seat and a locking portion folded down on the upper face of the fixing ring so as to lock its position.

Thereafter, the radially inner and radially outer terms must be defined with respect to the axis of the dispensing device.

More preferably, the length of the seat portion is between 0.5 mm and 2 mm so as to save the material of the housing.

First of all, such a dispensing device is simple to implement since the valve is mounted in a self-centering manner in the storage box in order to be locked in position. The cooperation of a seat portion and a locking portion guarantees an optimal assembly that can be repeated industrially at high speed. The amount of material required to manufacture such a dispensing device is limited compared to the prior art, which reduces the cost of manufacture and assembly. The dimensions of the seat portion provide optimal support for the valve which can be mechanically constrained during assembly without damage, the mechanical forces being optimally distributed by the seat portion.

Furthermore, thanks to the invention, the dispensing valve has a simple design and has no wall having undergone many deformation steps to obtain, for example, a lip or a seal cavity. Its cost is then limited.

In addition, thanks to the invention, it is not necessary to use additional means to block the dispensing valve, which is advantageous. The dispensing valve is advantageously indémontable storage housing. Finally, because of its simple design, the distribution box requires less material compared to the prior art, which is advantageous.

Advantageously, the dimensional accuracy of the valve / housing assembly is improved. Indeed, in the prior art, the de-swaging process resulted in deformation of the valve cup creating variations in the dispensing member, which resulted in accidental emptying of the dispensing device or leaks. Advantageously, such an assembly eliminates this problem since according to the invention, the cup is mounted on the dispensing member in its final position of use. No subsequent mechanical operation affects the vertical position of the dispensing member as could be the case in the prior art.

In addition, such a dispensing device is simple to control since each parameter can be directly measured, which was not the case in the prior art with a rolled edge or a dispensing valve equipped with a lip which are difficult to measure after assembly. Thanks to the invention, the controls can be automated and systematized for each product dispensing device. Such controls improve the quality compared to the static controls that were performed in the prior art. Preferably, the fixing ring is inclined relative to the axis X of the housing towards the inside of the storage box by an angle of between 10 ° and 45 ° in a plane in axial section.

More preferably, the seat portion is inclined with respect to the X axis of the housing towards the inside of the storage case by an angle of between 10 ° and 45 °, preferably between 25 ° and 35 °, in a plane in axial section. Such an angle facilitates the centering of the valve in the housing automatically, the risk of positioning error is eliminated.

Preferably, the locking portion is shorter than the seat portion, preferably from 5 to 80%. Thus, because of its short length, the locking portion is simple to deform while maintaining a seat portion providing optimal support. Finally, a blocking portion of short length makes it possible to limit the weight and therefore the cost of the storage box. More preferably, the locking portion has a length of between 0.2 and 4 mm in a plane in axial section.

In a preferred aspect, the locking portion and the seat portion are parallel. Thus, the fixing ring is sandwiched to limit axial or transverse movement. The valve cup is thus plated on the housing. This is particularly advantageous when the dispensing device comprises a sealing material.

Preferably, the cup is in contact only with the seat portion and the locking portion, which simplifies the assembly.

Preferably, the locking portion forms the upper end of the neck. The upper end of the neck is advantageously simple to deform. According to a preferred aspect, the dispensing device comprises a peripheral sealing material mounted between the fixing ring and the seat portion of the neck. Such a sealing material is compressed when mounting the valve, which increases the sealing in a practical manner. In addition, because of the presence of the seat portion, such a sealing material is easy to position by means of an industrial machine. The invention also relates to a method of assembling a dispensing device as presented above, the locking portion being radially external to the seat portion, the method comprises:

a step of positioning the cup in said neck of the box, the fixing ring bearing on the seat portion, and

a step of moving the locking portion radially inward so as to fold it on the upper face of the fixing ring to block its position

Thanks to the invention, the assembly process is shortened and requires fewer forming steps to achieve the dispensing device. The operations of producing the rolled edge, machining and rolling can advantageously be avoided. In addition, it eliminates the risk of pollution related to these machining operations that are likely to generate chips and particles on the inner wall and the outer wall of the housing. In addition, the storage case can be formed with greatly reduced or eliminated lubrication, which improves the cleanliness of the case. The invention makes it possible, under certain conditions, to manufacture the storage box without internal lacquer industrially, which is a break with the traditional methods that require the application of varnish to allow the forming operation of the rolled edge. Finally, the closure quality makes it possible to store pressurized products at high pressure, preferably up to 30 or 50 bars. Advantageously, the fixing ring is self-centered in the housing due to the inclination of the seat portion. Preferably, the storage case is held by its neck during the positioning step. Thanks to the assembly process, the housing is not supported on a support surface, which limits the risk of crushing the housing. In addition, the same assembly method can be used for different formats of housing, which is advantageous.

Preferably, the method comprises a step of adding a sealing material on the seat portion prior to the positioning of the fixing ring to ensure optimum sealing. Advantageously, the sealing material is autocentered in the housing due to the inclination of the seat portion. In addition, it is compressed in a progressive manner during the axial assembly of the valve.

The invention further relates to a machine for assembling a dispensing device as presented above, the machine comprising

- A holding member adapted to grip the housing by its neck,

a plating member adapted to exert a bearing on the valve along the axis X so as to press against the seat portion of the collar and

a deformation member adapted to deform the upper end of the neck so as to fold it over the valve and block its position

Such an assembly machine makes it possible to assemble a dispensing device in a practical manner, regardless of its format, since it is held by its neck by said machine.

PRESENTATION OF FIGURES

The invention will be better understood on reading the description which follows, given solely by way of example, and with reference to the appended drawings in which:

- Figure 1 is a schematic sectional representation of a dispensing device according to the prior art;

- Figure 2 is a sectional representation of a dispensing device according to the invention;

FIG. 3 is a close-up view of FIG. 2;

- Figure 4 is a schematic representation of the closure of the dispensing device by means of an assembly machine according to the invention;

- Figure 5 is a close sectional representation of the assembly machine of Figure 4;

- Figure 6 is a schematic close sectional representation of the forces exerted on the dispensing device during assembly; and

- Figure 7 shows in section several successive deformations of the locking portion to fold it on the fixing ring. It should be noted that the figures disclose the invention in detail to implement the invention, said figures can be used to better define the invention where appropriate.

DESCRIPTION OF ONE OR MORE EMBODIMENTS AND METHODS OF IMPLEMENTATION

The invention will be presented later for an aerosol for the distribution of a cosmetic product but it goes without saying that the invention applies to the distribution of any product, including a technical product, food, medical or pharmaceutical . Referring to Figures 2 and 3, there is shown a dispensing device 1 of pressurized product G according to the invention. The dispensing device 1 comprises a storage box 2 which is closed by a dispensing valve 4. The dispensing device 1 extends longitudinally along an axis X oriented from bottom to top in FIGS. 1 and 2. With reference to FIG. 2, the storage case 2 comprises a hollow body 20, an upper mounting opening 21 and a neck 3 connecting said hollow body 20 to said mounting opening 21. In this example, the storage box 2 has a shape of revolution around the axis X. Thereafter, the terms "inside" and "outside" are defined radially with respect to the axis X. Also, the hollow body 20 has an inner surface facing the X axis and an outer surface opposite the inner surface.

Preferably, the storage box 2 is made of aluminum or tinplate, but it goes without saying that other metallic or plastic materials could be suitable, for example, copper, zinc, glass or plastic materials of the invention. PE, PP, PET and PEN, pure or mixed. The storage box 2 may comprise a lower surface varnished according to the applications. The diameter of the upper mounting aperture 21 is between 15 mm and 32 mm, preferably between 20 mm and 22 mm. Preferably, the storage case 2 is formed by a stamping and forming process when it is made from metal. For other materials, for example plastic, other methods could be implemented, for example, sealing from the top of the valve by deforming the neck of the housing by heating. Still with reference to FIG. 2, the dispensing valve 4 comprises a closing wall, hereinafter referred to as a cup 40, through which a dispenser member 41 is fixed. The dispensing member 41 extends axially along the axis X while the cup extends transversely to said axis X.

The cup 40 has an upper face and a lower face oriented towards the inside of the hollow body 20. The lower face of the cup 40 is convexly convex to resist the pressure of the pressurized product which is stored in the hollow body 20 The dispensing member 41 of the valve 4 is fixed to a radially inner portion of the cup 40 as illustrated in FIG. 2. The dispensing member 41 is preferably in the form of a mechanical actuator of the type diffuser which is connected to a dip tube (not shown) extending from the underside. The cup 40 is preferably made of metal, thermoplastic plastic or thermoplastic, and has a constant thickness, preferably of the order of 0.2 to 0.6 mm but it is obvious that other materials or other thicknesses may also be suitable. According to the invention, the cup 40 comprises a peripheral fixing ring 42, forming the outer radial end of the cup 40, which is inclined inwards. In other words, the fixing ring 42 forms a conical portion adapted to be placed precisely and effortlessly in the housing 2. As will be presented hereinafter, axial cooperation between two conical surfaces makes it possible to achieve a centering and a clamping radial, which improves T 'sealing.

In this embodiment, the lower face of the radially outer portion of the cup is uniformly convex. As illustrated in FIG. 3 showing the valve in axial section, the fixing ring 42 is inclined with respect to the axis X by an angle α of between 10 ° and 45 °, preferably between 25 ° and 35 °, so to rest on the neck 3 stably as will be presented later. In other words, the fixing ring 42 cooperates by complementarity of shapes with the neck 3.

The neck 3 of the storage box 2 will now be presented in detail. As illustrated in Figure 2, the upper mounting opening 21 is formed at the upper end of the neck 3. The neck 3 is of annular cross section. Similar to the hollow body 20, the neck 3 defines a lower face oriented towards the X axis and an outer face opposite to the lower face. With reference to FIG. 3, the neck 3 comprises a peripheral seat portion 5 adapted to support the valve 4 and a peripheral locking portion 6 in order to block the valve 4. In other words, the neck 3 is crimped onto the valve 4 in order to to immobilize it.

Referring now to Figure 3, the peripheral seat portion 5 is inclined and is adapted to cooperate by complementary shapes with the underside of the fixing ring 42 so as to form a support seat for the latter. The locking peripheral portion 6 is folded over the upper face of the fixing ring 42 so as to block its position. In other words, the neck 3 is deformed, on the one hand, to optimally support the valve 4 during its positioning and, on the other hand, to block its transverse and / or axial displacement.

In this example, the seat portion 5 is inclined with respect to the X axis by an angle of between 10 ° and 45 °, preferably between 25 ° and 35 °, so as to form a seat for the cup 40. The seat portion 5 has a length L1 between 0.2 and 4 mm in order to ensure a compromise between a good quality of support and reduced dimensions. Such a seat portion 5 optimally distributes the forces when the valve 4 is constrained vertically downward, especially during assembly.

As illustrated in Figure 3, the locking portion 6 forms the upper end of the neck 3 and is folded towards the inside of the housing 2 so as to block any displacement of the valve 4. In order to limit the amount of material required for the neck 3 while ensuring quality blocking, the locking portion 6 is shorter than the seat portion 5, preferably from 5 to 80%. Preferably, the length L2 of the locking portion 6 is between 0.2 mm and 4 mm. Preferably, the receiving portion 5 and the locking portion 6 are parallel so as to sandwich the crown of fixing 42 between the receiving portion 5 and the blocking portion 6. Disassembly of the dispensing valve 4 is thus avoided. Advantageously, such a blocking portion 6 makes it possible to withstand very high pressures from 15 bars to more than 50 bars.

Advantageously, deformation of the neck 3 facilitates closure and optimally controls the quality of such a closure. For example, the dimensions can be controlled using a continuous vision system by comparators or calipers.

In this example, with reference to Figures 2 and 3, the dispensing device 1 comprises a sealing material 7 disposed between the fixing ring 42 and the seat portion 5 of the neck 3 so as to form a peripheral seal. Preferably, the sealing material 7 is made of plastic, latex, rubber or the like and is deposited on the seat portion 5 in the liquid state prior to the introduction of the valve 4 as will be presented thereafter during the presentation of the assembly process. It goes without saying that a peripheral seal positioned in the solid state, but flexible, could also be suitable. Preferably, the peripheral sealing material 7 is compressed between the fixing ring 42 and the seat portion 5, which ensures an optimum seal between the valve 40 and the neck 3.

Thanks to the invention, the seal obtained has small dimensions, which limits the risk of interaction between the seal and the product located inside the storage case 2. This is particularly advantageous when the pressurized product G is a medicine. Thanks to the invention, the amount of sealing material is limited in comparison with a dispensing device according to the prior art. As a result, interactions between pharmaceuticals, drugs, propellant and seal are greatly reduced and reliability is improved. A method of assembling the dispensing device 1 by means of an assembly machine 8 will now be presented with reference to FIGS. 4 to 7.

As illustrated in Figure 4, the assembly machine 8 is adapted to assemble the valve 4 on the housing 2 by manipulating the housing 2 by its neck 3. Such manipulation is advantageous because it allows, on the one hand, to limit the mechanical forces applied to the housing 2 as compared to a manipulation by force mounting a valve 4 on a vertical housing 2 whose base is supported on a support . On the other hand, such a manipulation makes it possible to overcome the constraint related to the length of the housing 2. Thus, the same machine 8 can assemble several different formats of dispensing devices 1, which is very advantageous.

With reference to FIG. 5, the assembly machine 8 comprises:

a holding member 81 adapted to grip the housing 2 by its neck 3, - a plating member 82 adapted to exert a bearing on the valve 4 along the axis X so as to press against the seat portion 5 of the neck 3 and a deformation member 83 adapted to deform the upper end of the neck 3 in order to fold it on the valve 4 and block its position. In more detail, with reference to FIG. 6, the holding member 81 is in the form of a collet that cooperates in complementary fashion with the external surface of the neck 3. In this example, the organ retaining portion 81 has a projecting portion which fits into a groove formed under the seat portion 5 of the neck 3. It goes without saying that the structure of the holding member 81 could be different, the important thing being to allow a stable and precise maintenance of the housing 2 by its neck 3 in order to handle it easily.

With reference to FIGS. 5 and 6, the plating member 82 has a lower end of complementary shape to that of the upper surface of the cup 40 of the valve 4. Advantageously, the plating member 82 has a vertical opening 84 at its lower end so as to allow the passage of the dispensing member 41 of the valve 4 in the vertical opening 84 during assembly. Such a vertical opening 84 also allows the housing 2 to be filled with a propellant fluid through the dispenser member 41 as will be presented hereinafter. The plating member 84 makes it possible to bring the attachment ring 42 closer to the seat portion 5. The approach is guided by the cooperation of the conical parts. In addition, the holding member 81 forms a stop limiting any excessive stress applied by the plating member 82 during plating. The assembly machine 8 further comprises a deformation member 83 adapted to incline the upper end of the neck 3 in order to fold it onto the valve 4. The stroke of the deformation member 83 is controlled so as to obtain the deformation desired. Advantageously, the holding member 81 and the plating member 82 form stops which limit the displacement of the deformation member 83. The locking portion 6, which forms the upper end of the neck 3, can be folded in a single deformation step by means of a single assembly machine 8 or folded in several successive stages by means of several different assembly machines. For example, it is shown in Figure 7 several successive positions of the locking portion 6 when it is deformed.

An example of assembly of the dispensing valve 4 in the storage case 2 by means of the assembly machine 8 will now be described. Ordinarily, the storage case 2 and the dispensing valve 4 are made independently before assembly. Prior to assembly, the locking portion 6 of the neck 3 extends radially outwardly relative to the seat portion 5 as shown in Figure 7 (diagram a). The product to be dispensed is introduced into the storage box 2 in the liquid state.

Then, the holding member 81 grasps the storage case 2 by its neck 3 as shown in Figure 4 in order to manipulate it. Preferably, a sealing material 7 is deposited on the seat portion 5 of the neck 3. Then, the valve 4 is placed vertically on the storage case 2 by the plating member 82 so that the crown fastening 42 cooperates by complementarity of shapes with the seat portion 5. During plating, the convex face of the cup 40 is turned towards the hollow body 20 of the storage case 2. Preferably, the cladding member 82 is moved by means of an elastic spring or a jack. The plating force is distributed optimally on the fixing ring 4, the holding member 81 fulfilling a counter-support function. The resistance to driving is improved in particular by the fact that the storage case 2 is held by the neck 3.

Advantageously, because of its conical shape, the fixing ring 42 is accurately centered in the casing 2 while compressing the material sealing 7 in a progressive manner, which guarantees an optimum seal. The positioning step of the valve 4 is precise and is thus easy and reproducible at a high rate. Advantageously, since the plating member 82 has a vertical opening 84 in which the dispensing member 41 extends, no mechanical force is applied to the dispensing member 41, which prevents any damage.

Then, the deformation member 83 is moved so as to fold down the upper end of the neck 3, that is to say the blocking portion 6, on the fixing ring 42 of the valve 4 in order to lock final valve 4 in the storage case both axially and transversely. Preferably, several deforming members 83 of different shapes can then be used successively. The deformation members 83 thus allow a crimping of the fixing ring 42 of the valve 4 which does not generate weak areas.

Finally, the storage box 2 is filled, via the dispensing member 41 of the valve 4, in propellant fluid (step not shown). Preferably, the propellant is conveyed via the vertical opening 84 of the plating member 82, the propellant can be compressed or liquefied. Alternatively, the propellant can be introduced prior to closing the storage box 2 by the dispensing valve 4. The propellant is mixed with the product to be dispensed into the hollow body 20 of the storage box 2 to form the product pressurized G to distribute. In the mounted position, the pressurized product G of the hollow body 20 exerts pressure on the underside of the cup 40, which tends to increase the diameter of the fixing ring 42. In other words, the stress between the cup 40 and the neck cylindrical 3 increases due to the pressurized product G, which ensures a tight seal and quality. The greater the pressure of the product G within the storage case 2, the greater the radially exerted force, which improves the seal. The convexity of the cup 40 makes it possible to improve the resistance to pressure.

Thus, a dispensing device 1 perfectly locked and sealed at a limited manufacturing price. Indeed, the storage box 2 has only a neck 3 whose manufacturing is cheap compared to the prior art since it does not require manufacturing a rolled edge, manufacturing a stamped edge or manufacturing a rolled edge and stamped. Finally, it is possible to produce a storage box without applying varnish.

The dispensing valve 4 has for its part a reduced cost since the cup 40 is simple to manufacture and requires no machining step or complex stamping. Finally, the equipment necessary for assembling the dispensing valve 4 in the storage box 2 is reduced, the assembly is precise and stable, which among other things makes it possible to speed up the production rates and facilitates the control steps. .

In use, when the mechanical member 41 is pressed down towards the hollow body 20 of the storage case 2, the dispensing valve 4 is open and the product to be dispensed can escape from the dispensing device 1. Such a dispensing device 1 is very well suited for products that can be conditioned with propellant fluids (N ² , ΝΌ, C0 ² , ...) up to 15 bar at 50 ° C., in particular following the evolution of aerosol directive 75/324 / EEC. The pressure resistance of such a dispensing device 1 is improved in order to withstand a pressure of 40 bar, in particular during heating of said storage box 2.

Claims

Device for dispensing (1) pressurized product (G) extending axially along an axis (X), the device (1) comprising:

a storage case (2) comprising a hollow body (20) filled with pressurized product (G), an upper mounting opening (21) and a neck (3) connecting said hollow body (20) to said upper mounting opening (21), and

a dispensing valve (4) comprising a cup (40), defining an upper face and a lower face, adapted to be fixed to the storage box (2) in order to close it and a dispensing member (41) fixed to a radially inner portion of the cup (40), the cup (40) having a peripheral attachment ring (42), forming the outer radial end of the cup (40), which is inclined inwards, in a plane axial section, characterized in that the neck (3) comprises:

- a seat portion (5), inclined inwardly, which has a length of between 0.5mm and 5mm in an axial sectional plane, which cooperates by complementary shapes with the underside of the fixing ring (42). ) to form a seat and

- A locking portion (6) folded on the upper face of the fixing ring (42) so as to lock its position.

Dispensing device (1) according to claim 1, wherein the fixing ring (42) is inclined with respect to the axis (X) of the housing (2) towards the inside of the storage box (2) of a angle (a) between 10 ° and 45 ° in a plane in axial section.

Dispensing device (1) according to one of claims 1 and 2, wherein the seat portion (5) is inclined relative to the axis (X) of the housing (2) towards the inside of the storage box ( 2) at an angle of between 10 ° and 45 ° in a plane in axial section.

Dispensing device (1) according to one of claims 1 to 3, wherein the locking portion (6) is shorter than the seat portion (5), preferably from 5 to 80%. Dispensing device (1) according to one of claims 1 to 4, wherein the locking portion has a length of between 0.2mm and 4mm in a plane in axial section.

Dispensing device (1) according to one of claims 1 to 5, wherein the cup (40) is in contact only with the seat portion (5) and the locking portion (6).

Dispensing device (1) according to one of claims 1 to 6, wherein the locking portion (6) forms the upper end of the neck (3).

Dispensing device (1) according to one of claims 1 to 7, comprising a peripheral sealing material (7) mounted between the fixing ring (42) and the seat portion (5) of the neck (3).

A method of assembling a dispensing device (1) according to one of claims 1 to 8, the locking portion (6) being radially external to the seat portion (5), the method comprising:

a step of positioning the cup (40) in said neck (3) of the casing (2), the fixing ring (42) bearing on the seat portion (5), and

- A step of moving the locking portion (6) radially inwardly so as to fold on the upper face of the fixing ring (42) to block its position

Assembly machine (8) of a dispensing device (1) according to one of claims 1 to 8, the machine (8) comprising

a holding member (81) adapted to grip the housing (2) by its neck (3), a plating member (82) adapted to exert a bearing on the valve (4) along the axis (X) so as to press it against the seat portion (5) of the neck (3) and

a deformation member (83) adapted to deform the upper end of the neck (3) in order to fold it onto the valve (4) and block its position.