EP1248735A2

EP1248735A2 - Sealing device for container

Info

Publication number: EP1248735A2
Application number: EP01903961A
Authority: EP
Inventors: Gabriel Bouzaglo
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-01-17
Filing date: 2001-01-16
Publication date: 2002-10-16
Also published as: AU3190801A; WO2001053164A3; US20030071084A1; IL150743A0; US6827241B2; WO2001053164A2

Abstract

The invention concerns a device comprising a membrane valve consisting of a part (15) forming said valve seat, wherein is provided a conduit (25, 26) circulating the product contained in the container (2, 50), and of a membrane (16) made of an elastically deformable material, tightly engaged on said part (15). The invention is characterised in that said part (15) has a general conical part, and a cross-section flaring out in the direction of the orifice (24) allowing the product to flow beyond said valve; said membrane (16) has a generally conical shape corresponding to that of said part (15), and can be tightly fitted thereon, and said membrane (16) and said container (2) comprise support means (5, 10, 11, 28, 30 to 32) to maintain the membrane (16) in its tight-fit position on said part (15).

Description

SEALING DEVICE FOR CONTAINER

The present invention relates to a sealing device for a container, making it possible to preserve the product contained in said container from contact with ambient air or from contamination by a foreign body coming from outside the container.

This container can in particular be a "tube", that is to say an envelope, one longitudinal end of which has a neck and the other longitudinal end of which is closed by pinching and assembling, in particular by welding, the walls of this envelope. The product can be any product for which it is important to ensure protection against contact with air or against soiling, in particular a cosmetic product, a food product or a product for medical use.

The invention also relates to a sealing device for a container and a container structure intended to contain two substances separately and to allow the mixing of these substances at the time of their use.

International application (PCT) No. WO 97/47531 describes a sealing device comprising a cylindrical part intended to be inserted into the neck of a container and two product flow channels contained in this container. Said cylindrical part includes a groove giving it the shape of a "diabolo" and is covered by an elastomer membrane, which closely follows it. This membrane allows, by its elastic deformation resulting from a pressure on the container, the flow of the product between it and said cylindrical part, and is pressed against this cylindrical part in the absence of such pressure, so that it fulfills the function of a valve.

This device is satisfactory in practice but has the drawback, however, of implying perfect complementarity of shape between said cylindrical part and said membrane, failing which sealing is not obtained. This complementary form requires the use of molding techniques relatively complex to implement.

In addition, it is not excluded that there is a space between said cylindrical part and the membrane, in which an amount of product can stagnate. This quantity of product can be more or less contaminated with air, which is not desirable in the case of a cosmetic product, food or medical. The stopper described in this same previous international application is not adaptable to any type of container, which constitutes a certain annoyance in practice.

Document GB-A-214 548 describes a sealing membrane which must be stretched to be placed on a sealing surface with which it is intended to cooperate. This stretching leads to a significant difficulty in manufacturing the container.

Document WO 98/14387 describes a sealing membrane of cylindrical shape placed on a sealing surface of corresponding cylindrical shape and maintained thereon by means of the engagement of an annular projection integral with the membrane in a groove fitted in said sealing surface. In addition to mounting difficulties, the seal obtained does not appear perfect.

Furthermore, an existing container generally comprises a screw cap which, while providing good protection for the product contained in the container, is, on the other hand, relatively difficult to manufacture and handle. Other containers include pivoting lids, which are easier to manufacture and handle than screw caps but which do not provide perfect protection of the product contained in the container against air or dirt.

Furthermore, a container structure for containing two substances separately and allowing the mixing of these substances at the time of their use is known in itself. Existing container structures have certain practical drawbacks, however, linked either to their manufacture or to their use.

The present invention aims to provide a membrane sealing device of the aforementioned type, easy to manufacture, by means of a molding technique relatively inexpensive and inexpensive to implement, allowing obtaining a perfect sealing, and adaptable to any type of container, in particular those comprising caps fixed on their neck.

The invention also aims to effectively eliminate the risk of contamination by ambient air, or of contamination by foreign bodies, of the quantity of product that can stagnate between the product outlet orifice outside the container and the valve that forms the membrane. The invention has the additional objective of providing a structure which gives perfect satisfaction, both from the point of view of the manufacture of the container, in particular as regards the molding of the different parts constituting this container, as from the point of view of the ease of handling of this container by the user.

The device comprises, in a manner known per se, a membrane valve constituted by a part forming the seat of this valve, in which is arranged a flow conduit for the product contained in the container, and by a membrane made of elastically deformable material, tightly engaged on this seat part; this membrane, by its elastic deformation resulting from a pressure exerted on the product contained in the container, allows the flow of this product between it and the seat part and, in the absence of such pressure, is pressed against this seat portion to block the flow of the product and close the container tightly.

According to the invention,

- Said seat portion has a generally conical shape, and has a cross section which increases in the direction of the product flow orifice beyond said valve; said membrane has a generally conical shape corresponding to that of said seat part, this form being such that this membrane can be fitted tightly onto this seat part, and

- Said membrane and said container comprise respective support means, cooperating with each other when the sealing device is mounted on the container to maintain the membrane in its narrow fitting position on said seat portion .

Thus, according to the invention, said seat part and said membrane can be produced independently of one another and then be assembled together by fitting to form the sealing device; said means for supporting the membrane relative to the container then make it possible to ensure the axial immobilization of the membrane relative to the seat part. This seat part and this membrane can therefore be produced by relatively conventional molding techniques and simple to implement, and the sealing device according to the invention is no longer dependent, as in the prior art, on a close engagement in the neck of the container.

The seat part and the membrane are advantageously shaped to allow a slight circumferential stretching of the membrane on the seat part in said narrow fitting position.

This circumferential stretch makes it possible to absorb any respective dimensional variations of the seat part and of the membrane, resulting from the manufacturing tolerances thereof.

Said support means may advantageously extend over the entire circumference of the membrane and be shaped so as to be able to constitute a seal between the part of the container forming the product reservoir and the neck of the container and / or between this neck and a part, such as a cap, which can receive the end of the container.

According to a preferred embodiment of the invention, the seat part is molded with a part, in particular a cap, intended to be mounted, for example by snap-fastening, on the neck of the container. Advantageously, in this case,

the membrane comprises a bead which comes to bear, when the said piece is placed on the container, against a bearing surface arranged in the neck of the container, and / or

- The membrane has a collar projecting radially outward, shaped to be, during the establishment of said part on the container, pinched between the neck and this part.

Advantageously, the seat part has a rib projecting from its wall, radially and towards the outside thereof, this rib being located between the duct through which the product can be introduced between the seat part and the membrane and the conduit through which this product escapes from this seat-forming part and this membrane towards the outlet orifice, the two orifices of these conduits located closest to each other being arranged near this rib.

Said rib thus cooperates with the membrane to form a linear seal which clearly separates the area between these two orifices, and this area is reduced to a minimum. This joint constitutes a effective barrier against the introduction of a foreign body, and there is practically no product capable of stagnating between said orifices and therefore capable of being contaminated by ambient air.

Preferably, the sealing device comprises a pivoting cover shaped to be normally returned to the closed position and to pivot in the open position only under the pressure of the product flow.

This cover completes the sealing of the container, in particular allows perfect protection of the quantity of product located immediately behind the product outlet orifice.

Advantageously, in this case, the cover comprises a tab shaped to come, in the closed position of this cover, to bear against a thickened part of the membrane, and for, when the cover is pivoted to the open position, elastically deform this thickened part, so that the latter tends, by elastic return, to return the cover to the closed position.

This thickened part can in particular belong to the abovementioned support means.

Said tab may comprise a notch engaging with a corresponding rim, to ensure the mounting of the cover, the coming of this lug against said thickened part of the membrane ensuring the maintenance of this notch against this rim.

The cover can also include at least one deformable part molded therewith, which is shaped to deform when the cover is brought into the open position and to tend, by elastic return, to normally bring this cover back into the closed position.

According to another aspect of the invention, the device comprises a cap delimiting a product flow duct and a cover pivotally received on this cap to allow the duct to be closed; the cap has a hole and has a piece of elastic material located inside of it, opposite this hole; the cover includes a tab dimensioned to be engaged in this hole with a possibility of play, this play allowing the mobility of said cover between its open and closed positions; the tab further comprises a rib capable of being snapped behind an edge of the delimiting cover said hole, in order to ensure the mounting of the cover on the cap; the assembly is shaped so that, when said rib is snapped behind said edge, the tab deforms said elastic piece, so that the elastic return of this piece makes it possible to maintain the cover in its closed position and without the flexibility of this part does not prevent the pivoting of this cover in the open position under the pressure of the product contained in the container.

The lid is thus normally kept in the closed position, and only pivots in the open position to allow the product contained in the container to flow. As a result, perfect protection of this product is ensured, and the device remains simple and easy to manufacture, and easy to assemble.

Preferably, the cover comprises, on the side opposite to said tab, at least one deformable part molded therewith, while the cap comprises at least one corresponding wall against which this deformable part comes to slide when the cover is brought into position d 'opening ; said corresponding wall makes it possible to deform said deformable part, so that this deformation tends, by elastic return of the material of the cover, to bring this cover back into the closed position.

Advantageously, the cap comprises a recess for receiving the cover in the closed position, this recess having dimensions which correspond to those of the cover and being shaped so that the outside face of the cover is in line with the outside face of the cap. when the cover is placed in said recess, in the closed position.

The cover thus offers no external socket capable of allowing it to be lifted. Product protection is further increased.

The cover advantageously has, on its outer side and facing said tab, a zone shaped so as not to correspond exactly to the shape of the corresponding zone of the cap with which it comes into engagement when the cover is mounted on the cap. As a result, the cover is slightly elastically deformed when the tab is engaged in said hole in the cap and this deformation contributes to keeping the cover normally in its closed position. According to another aspect of the invention, the container has a structure comprising a first reservoir, which contains a first substance, a second reservoir, which contains a second substance, and means for mixing these substances when they are used. ; said first reservoir has a deformable structure allowing it, in the non-compression position, to contain said first substance, and, in compression position, to expel this substance; said second reservoir comprises a cover ensuring its closure; the container structure comprises a central body to which said first and second tanks are connected, said second tank being pivotally mounted on this central body; the container structure comprises means making it possible, in an angular position of the second reservoir relative to the central body, to act on said cover to place said second reservoir in communication with said first reservoir; the container structure comprises means making it possible to compress said first reservoir in order to expel the substance contained therein so as to pass it, through the central body, into said second reservoir in order to mix said first and second substances .

Putting the tanks in communication with each other therefore involves simply pivoting said second tank relative to said central body and then compressing said first tank in order to cause said first substance to pass into said second tank.

The container structure thus formed is simple and easy to manufacture and assemble, and is simple to handle by the user.

According to a preferred embodiment of the invention, - the container structure comprises means making it possible to wedge said second reservoir relative to the central body in an angular position; - the central body includes a peripheral wall which has a helical groove arranged in its outer face and asperities projecting into this groove or areas of local interruption of this groove;

- The container structure also includes a control part engaged around said first tank; this control part is provided with a clean bottom to press against said first reservoir in order to compress the latter, and portions of net capable of cooperating with said groove to allow axial movement of this part relative to said central body, by screwing ; these portions of the thread and said local roughness or interruptions of the groove are shaped so as to create a "hard point" allowing, below a torque threshold, to pivotally lock said control part relative to said central body, and beyond this torque threshold, to allow said roughness or local interruptions to be crossed by said thread portions, to allow said control part to be screwed onto said central body.

Before using the container, said control part occupies a first axial position relative to said central body, in which said thread portions are in abutment against said local roughness or interruptions, and wedge the control part in pivoting with respect to this central body. The pivoting drive of this control part in one direction while said second tank is maintained causes the central body to pivot relative to the second tank to the angular position of placing the second tank in communication with said first tank and at the pivoting setting position of the second reservoir relative to the central body. This setting allows, if the pivoting drive of the control piece is continued, to achieve the crossing of said roughness or local interruptions by said thread portions, and therefore the screwing of the control piece on the central body, which achieves the compression of the first reservoir and therefore the passage of said first substance in said second reservoir.

On the side opposite to said cover, said second reservoir may have a deformable structure, constituted by a corrugated configuration which allows its expansion in order to allow the introduction into it of the substance contained in said first reservoir. In its expanded form, this second reservoir can form a point of application of the product; a ball of material can be arranged at the end of the point, by being connected to the latter by a zone of frangible material, this ball being able to be separated from said second reservoir when it is gripped manually and turned on itself to tear said zone of material that connects it to this tank. For a good understanding, the invention is again described below with reference to the appended diagrammatic drawing representing, by way of nonlimiting example, a preferred embodiment of the sealing device which it relates.

Figure 1 is a perspective view of a cap which is equipped with it, a membrane it comprises, and a cover closing the opening of the cap; Figure 2 is a sectional view along its axis, as well as said cap and cover, this figure also showing the end of a container on which the cap is intended to be snapped; Figure 3 is a perspective view of the cap from the outside; Figure 4 is a perspective view of the cap from the inside; Figure 5 is a flat view of the cover, from the inner face thereof; Figure 6 is a view similar to Figure 2, after assembly, in the flow position of the product contained in the container; Figure 7 is a view similar to Figure 6, in the closed position of the container; Figure 8 is a longitudinal sectional view of another container fitted with said sealing device, in one position; Figure 9 is a view similar to Figure 8, in another position of this container, and Figure 10 is an enlarged view, in section, of a part that includes this container.

FIGS. 1 to 7 represent a sealing device 1 for a container 2, making it possible to preserve the product contained in this container 2 from contact with ambient air or from contamination by a foreign body coming from outside the container 2. This container can in particular be a "tube", that is to say an envelope 3, one longitudinal end of which has a wall circular transverse 4 and a neck 5, and the other longitudinal end of which (not visible in the figures) is closed by pinching and assembling the walls of this envelope 3.

In the example shown, this container 2 comprises a cap 6, suitable for covering the neck 5 and being snapped onto the latter, by cooperation of respective annular projections 7, 8, as well as a cover 9 for closing this cap 6 .

In addition, the container 2 comprises an internal flange 10 projecting from its wall at the base of the neck 5, surmounted by a conical surface 11. The flange 1 0 has a circular wall 1 2 projecting upwards.

The device 1 comprises a membrane valve constituted by a pad 1 5 forming the seat of this valve and by a membrane 1 6 of elastically deformable material, engaged closely on this pad 1 5. The pad 1 5 is integral with the wall of end 20 of the cap

6. It has an upper curved wall 21, an intermediate transverse wall 22 and a lower curved wall 23. The wall 21 defines, with the wall 20, an orifice 24 for the product contained in the container 2 and, with the web 22 , an upper conduit 25 for the flow of this product; the wall 23 delimits, with the web 22, a lower conduit 26 for the flow of this same product.

The stud 1 5 also has a rib 27 projecting from its wall, radially and towards the outside thereof, at the level of the web 22.

This rib 27 extends over the same angular portion of the stud 1 5 as the conduit 26 and thus separates the upper orifice of this conduit 26 from the lower orifice of the conduit 25.

This stud 1 5 has a generally conical shape and has a cross section which increases in the direction of the orifice 24.

The cap 6 also has a circular wall 28 and a hole 29 located on the side diametrically opposite to the orifice 24. The wall 28 projects from the internal face of the wall 20, and its internal face has a slight inclination relative to the axis of the cap 6.

The membrane 1 6 is molded from an elastically deformable material. It has a generally conical tubular shape, corresponding to the outside shape of the stud 1 5. This shape is such that the membrane 1 6 can be fitted tightly on the pad 1 5, being slightly stretched in the circumferential direction.

The membrane 1 6 comprises a bead 30 at its end of smaller section and a bead 31 extended by a flange 32 at its end of larger section. The bead 30 has a circular groove 34 opening into its axial end face 35, as well as an inclined lateral face 36. The groove 34 has a width less than the width of the wall 12 and is intended to receive this wall 1 2 during the assembly of the cap 6, the membrane 1 6 and the container 2. This reception causes a radial deformation, towards the outside, of the bead 30, ensuring the perfect sealing of the assembly. The faces 35 and 36 respectively bear against the flange 10 and the surface 11, as shown in FIGS. 6 and 7. The flange 32 projects radially outward, and is shaped to be, when put in place of the cap 6 on the container 2, pinched between the neck 5 and the wall 28 of the cap 6.

The cover 9 has a tab 40 comprising a notch 41, walls 42 suitable for engaging in the duct 25 to guide the pivoting of the cover 9, and inclined faces 43 suitable for coming to bear against the internal face of the wall 28 .

As shown more particularly in Figures 6 and 7, this tab 40 is intended to be engaged in the hole 29 and to come to bear against the bead 31, by slightly sinking therein.

This depression keeps the catch 41 in engagement with the corresponding edge of the cap 6 which delimits the hole 29.

The area 44 of the cover 9 located opposite the tab 40 is shaped so as not to correspond exactly to the shape of the area of the wall 20 with which it comes into engagement, so that the cover 9 is slightly elastically deformed when said tab 40 is engaged in the hole 29 and this deformation tends to normally maintain the cover 9 in its closed position and this cover 9 pivots in the open position only under the pressure of the product flow.

The aforementioned depression of the tab 40 in the bead 31 allows the elastic deformation of this bead 31 during the movement of the cover 9 in the open position, which tends, by elastic return, to return the cover to the closed position.

The faces 43 slide against the internal face of the wall 28 during this same movement of the cover 9 in the open position but are shaped to slightly deform the walls 42 and the cover 9 in this same position, thus helping to recall the cover 9 in the closed position.

In practice, the cap 6 - pad 1 5 assembly on the one hand and the membrane 16 on the other hand can be produced independently and then be assembled by fitting to constitute the sealing device 1. The circumferential stretching of the membrane 6, as well as the rib 27, makes it possible to absorb any respective dimensional variations of the pad 1 5 and of the membrane 1 6.

After mounting, the beads 30 and 31, the flange 32, the flange 10, the bearing 11, the neck 5 and the wall 28 constitute support means cooperating with each other to maintain the membrane 16 in its narrow fitting position on the stud 15. These same means make it possible to form two seals for the container 2. These seals are particularly effective, given that the surface 11 and the wall 28 tend to press the beads 30 and 31, respectively, radially and inward.

A pressure exerted on the container 2 causes the product contained in this container to flow in the conduit 26, up to the veil 22 and to the rib 27. The latter cooperates with the membrane 16 to form a linear seal which clearly separates the area located between the upper orifices of the conduit 26 and the lower of the conduit 25. This seal constitutes an effective barrier against the introduction of any foreign body into the container 2. In addition, said zone is reduced to a minimum and there is practically no product likely to stagnate between said orifices. The cover 9 allows perfect protection of the quantity of product located immediately behind the orifice 24.

Figures 8 and 9 show another container 50 equipped with a device 1 identical to that described above. For simplification, the same reference numbers as above are used to designate the means already described. The container 50 has a structure allowing it to contain two substances separately and to allow the mixing of these substances at the time of their use.

This container structure 50 comprises a first tank 51, containing one of these substances, a second tank 52, containing the other of these substances, a central body 53 to which the tanks 51 and 52 are connected, and a control part. 54 can be screwed onto the body 53.

The reservoir 51 has a bellows structure allowing it, in the non-compression position (Figure 8), to contain said substance, and, in the compression position (Figure 9), to expel this substance. It has a neck 5 allowing it to snap onto the body 53, and a conical bearing 11.

The reservoir 52 has a circular recess 55 shaped to allow its connection to the body 53 by snap-fastening, with the possibility of pivoting of the reservoir 52 relative to the body 53.

The reservoir 52 also includes a neck closed by a cover 56. This cover 56, more particularly visible in FIG. 10, includes a pad 60 connected to it by a zone of thinned material 61, this pad 60 being fitted with a tab 62 projecting, after mounting, beyond a curved wall 63 that comprises the body 53, as shown in FIG. 8.

On its side close to the cover 56, the tank 52 has a bellows structure, of dimensions and number of folds identical to the bellows structure of the tank 51. This bellows structure allows the expansion of the reservoir 52 in order to allow the introduction into it of the substance contained in the reservoir 51. On the side opposite to the cover 56, the reservoir 52 forms a point 65 at the end of which is a ball of material 66. This ball 66 is connected to the point 65 by a zone of frangible material, and can be separated of the reservoir 52 when it is entered manually and turned on itself to tear this area of material. This separation allows the opening of the reservoir 52, and the tip 65 forms an applicator.

The body 53 comprises a circular wall 70 in the outer face of which is arranged a helical groove. This groove is interrupted locally, at determined locations, to create a "hard point" as described below.

The body 53 also includes a transverse veil 71, from which protrudes an end piece 72 for the connection of the neck 5. This veil 71 is secured to a stud 1 5 as mentioned above and an end piece 72 for the connection of the neck 5 of the tank 51. The veil 71 also includes a wall 28 as mentioned above for tightening the flange 32 between this wall 28 and the neck 5.

The part 54 has a tubular shape closed by a bottom at one end, and is engaged around the tank 51. On the side opposite said bottom, it comprises portions 75 of net, capable of cooperating with the groove of the wall 70 to allow the axial movement of this piece 54 between the axial positions shown respectively in Figures 8 and 9. In the position shown in FIG. 8, these portions 75 are in abutment against said local interruptions of the groove. These portions of the thread 75 and said local interruptions of the groove are shaped so as to create said "hard point", making it possible, below a torque threshold, to pivotally wedge the part 54 relative to the body 53, and to the beyond this torque threshold, to allow said local interruptions to be crossed by said thread portions 75, in order to allow the piece 54 to be screwed onto the body 53.

In practice, in order to mix the substances contained in the reservoirs 51 and 52, the part 54 is gripped by one hand while the other hand grasps the reservoir 52. This part 54 is pivotally driven in one direction while the reservoir 52 is maintained or is pivotally driven in the opposite direction. Said abutment position of the portions 75 against said interruptions of the groove causes the reservoir 52 to pivot relative to the body 53, until the tab 62 bears against the wall 63 then crosses this wall, which tears the thinned zone 61 and thus opens the reservoir 52. The tab 62 is then retained by the wall 63, which maintains the orifice thus created opposite the flow conduit delimited by this wall 63 and the wall 21, and securely holds the reservoir 52 by relation to the body 53.

This setting and the continuation of the drive exerted on the part 54 then allow said portions 75 to cross said interruptions of the groove of the body 53, which allows this part 54 to be screwed by relative to this body 53. This screwing makes it possible to compress the reservoir 51 and, in so doing, to force the passage of the substance contained in this reservoir 51 through the valve that constitutes the membrane 1 6 and the web 22. The flow of substance from the tank 51 towards the tank 52 causes an expansion of the tank 52 correlatively to the compression of the tank 51.

The ball 66 is then removed for opening the container for the application of the product obtained by the mixture of said substances.

As appears from the above description, the invention provides a sealing device having many advantages compared to homologous devices of the prior art, in particular those of being easy to manufacture, by means of relatively molding techniques. not very complex and inexpensive to implement, allowing a perfect seal to be obtained, and being adaptable to any type of container.

The invention also provides a container structure which is perfectly satisfactory, both from the point of view of the manufacture of the container and from the point of view of the ease of handling of this container by the user. It goes without saying that the invention is not limited to the embodiment described above by way of example, but on the contrary embraces all of the variant embodiments thereof. Thus, the part 54 could be omitted, the pressure on the reservoir 51 can then be exerted directly.

Claims

1 - Sealing device (1) for container (2, 50), comprising a diaphragm valve constituted by a part (15) forming the seat of this valve, in which a flow conduit (25, 26) is arranged of the product contained in the container (2, 50), and by a membrane (16) of elastically deformable material, engaged closely on this part (15) forming a seat; this membrane (16), by its elastic deformation resulting from a pressure exerted on the product contained in the container (2, 50), allows the flow of this product between it and the part (15) forming a seat and, by absence of such pressure, is pressed against this part (15) forming a seat to block the flow of the product and close the container (2, 50) in a sealed manner; device (1) characterized in that: - said seat portion (15) has a generally conical shape, and has a cross section which increases in the direction of the orifice (24) for the flow of product beyond said valve;

said membrane (16) has a generally conical shape corresponding to that of said seat portion (15), this shape being such that this membrane (16) can be fitted tightly onto this seat portion (15), and

- said membrane (16) and said container (2, 50) comprise respective support means (5, 10, 11, 12, 28, 30 to 32, 34), cooperating with each other when the device (1 ) sealing is mounted on the container (2, 50) to maintain the membrane (16) in its narrow fitting position on said part (15) forming a seat.

2 - Device (1) according to claim 1, characterized in that the part (15) forming the seat and the membrane (16) are shaped to allow a slight circumferential stretching of the membrane (16) on the part (15) forming the seat in said narrow fitting position.

3 - Device (1) according to claim 1 or claim 2, characterized in that said support means (5, 10, 11, 12, 28, 30 to 32, 34) extend over the whole of the circumference of the membrane (16) and are shaped to be able to constitute a seal between the part of the container (2, 50) forming the product reservoir and the neck (5) of the container (2, 50) and / or between this neck (5) and a part (6, 53), such as a cap (6), which can receive the end of the container (2, 50).

4 - Device (1) according to one of claims 1 to 3, characterized in that the part (1 5) forming a seat is molded with a part (6, 53), in particular a cap (6), intended to be mounted , for example by snap-fastening, on the neck of the container (2, 50).

5 - Device (1) according to claim 4, characterized in that:

- The membrane (1 6) comprises a bead (30) coming to bear, during the establishment of said piece (6, 53) on the container (2, 50), against a bearing surface (10, 1 1 ) fitted in the neck of the container (2, 50), and / or

- The membrane (1 6) has a flange (32) projecting radially outward, shaped to be, during the establishment of said piece (6, 53) on the container (2, 50), pinched between the neck (5) and this part (6, 53).

6 - Device (1) according to one of claims 1 to 5, characterized in that the part (1 5) forming a seat has a rib (27) projecting from its wall, radially and outwardly thereof , this rib (27) being located between the orifice through which the product can be introduced between the portion (1 5) forming a seat and the membrane (1 6) and the orifice through which this product escapes from this part (1 5) forming a seat and this membrane (1 6), each of these orifices being arranged near this rib (27). 7 - Device (1) according to one of claims 1 to 6, characterized in that it comprises a pivoting cover (9) shaped to be normally returned to the closed position and to pivot in the open position only under pressure of the product flow.

8 - Device (1) according to claim 7, characterized in that the cover (9) comprises a tab (40) shaped to come, in the closed position of this cover (9), bear against a thickened part (31) of the membrane (1 6), and for, when the cover (9) is pivoted to the open position, elastically deform this thickened part (31), so that the latter tends, by elastic return, to bring the cover back (9) in the closed position. 9 - Device (1) according to claim 8, characterized in that said tab (40) comprises a notch (41) engaging with a corresponding flange, for mounting the cover (9), the coming of this tab ( 40) against said thickened part (31) of the membrane (1 6) ensuring the maintenance of this notch (41) against this rim.

10 - Device (1) according to claim 8 or claim 9, characterized in that the cover (9) comprises at least one deformable part (42, 43) molded therewith, which is shaped to deform when the cover (9) is brought into the open position and to tend, by elastic return, to normally return this cover (9) to the closed position.

1 1 - sealing device (1) for container (2), according to claim 1, comprising a cap (6) which delimits a conduit (25, 26) for the flow of the product contained in the container (2), and a cover (9) pivotally received on this cap (6) to allow the closing of the duct (25, 26), characterized in that:

- The cap (6) has a hole (29) and has a piece (31) of elastic material located inside of it, opposite this hole (29); - The cover (9) comprises a tab (40) dimensioned to be engaged in this hole (29) with a possibility of play, this play allowing the mobility of said cover (9) between its open and closed positions; the tab (40) further comprises a rib (41) suitable for being snapped behind an edge of the cover (9) delimiting said hole (29), in order to ensure the mounting of the cover (9) on the cap (6); the assembly is shaped so that, when said rib (41) is snapped behind said edge, the tab (40) deforms said elastic piece (31), so that the elastic return of this piece (31) allows maintain the cover (9) in its closed position and without the flexibility of this part (31) preventing the pivoting of this cover (9) in the open position under the pressure of the product contained in the container.

1 2 - Device according to claim 1 1, characterized in that the cover (9) comprises, on the side opposite to said tab (40), at least one deformable part (42, 43) molded therewith, while the cap (6) comprises at least one corresponding wall (28) against which this deformable part (42, 43) slides when the cover (9) is brought into the open position; said corresponding wall (28) makes it possible to deform said deformable part (42, 43), so that this deformation tends, by elastic return of the material of the cover (9), to bring this cover (9) back into the closed position.

1 3 - Device according to claim 1 1 or claim 1 2, characterized in that the cap (6) comprises a recess for receiving the cover (9) in the closed position, this recess having dimensions which correspond to those of the cover (9) and being shaped so that the outer face of the cover (9) is in line with the outer face of the cap (6) when the cover (9) is placed in said recess, in the closed position.

1 4 - Device according to one of claims 1 1 to 1 3, characterized in that the cover (9) has, on its outer side and facing said tab (40), a zone (44) shaped so as to does not correspond exactly to the shape of the corresponding zone of the cap (6) with which it comes into engagement when the cover (9) is mounted on the cap (6).

1 5 - sealing device (1) for container (2), according to claim 1, comprising a container whose structure is intended to contain two substances separately and to allow the mixing of these substances at the time of their use, this device comprising a first reservoir (51), which contains a first substance, a second reservoir (52), which contains a second substance, and means for mixing these substances at the time of their use; device characterized in that:

- Said first reservoir (51) has a deformable structure allowing it, in the non-compression position, to contain said first substance, and, in the compression position, to expel this substance; - Said second reservoir (52) comprises a cover (56) ensuring its closure;

- the container structure (50) comprises a central body (53) to which said first and second tanks (51, 52) are connected, said second tank (52) being pivotally mounted on this central body (53); - The container structure (50) comprises means allowing, in an angular position of the second reservoir (52) by relative to the central body (53), acting on said cover (56) to put said second tank (52) in communication with said first tank (51);

the container structure (50) comprises means (54) making it possible to compress said first reservoir (51) in order to expel the substance contained therein so as to pass it through the central body (53), in said second tank (52) for mixing said first and second substances.

1 6 - Device according to claim 1 5, characterized - in that the container structure (50) comprises means for wedging said second reservoir (52) relative to the central body (53) in an angular position;

- In that the central body (53) comprises a peripheral wall (70) which has a helical groove arranged in its outer face and asperities projecting in this groove or areas of local interruption of this groove;

- in that the container structure (50) comprises a control part (54) engaged around said first tank (51); this control piece (54) is provided with a bottom suitable for pressing against said first reservoir (51) in order to compress the latter, and with portions of net (75) suitable for cooperating with said groove to allow the axial displacement of this part (54) relative to said central body (53), by screwing; these portions of the net (75) and said local roughness or interruptions of the groove are shaped so as to create a "hard point" allowing, below a torque threshold, to pivotally lock said control part (54) by report to said central body (53), and beyond this torque threshold, to allow the crossing of said roughness or local interruptions by said thread portions (75), to allow the screwing of said control piece (54) on said central body (53). 1 7 - Device according to claim 1 5 or claim 1 6, characterized in that said first tank (51) has a bellows structure.

1 8 - Device according to claim 1 7, characterized in that said second tank (52) has a bellows structure, of dimensions and number of folds identical to the bellows structure of said first tank (51). 1 9 - Device according to claim 1 or claim 2, characterized in that said second reservoir (52) forms a point (65).

20 - Device according to claim 1 9, characterized in that a ball of material (66) is arranged at the end of the tip (65), being connected to the latter by a zone of frangible material, this ball (66) which can be separated from said second reservoir (52) when it is grasped manually and turned on itself to tear said zone of material which connects it to this reservoir (52).