Container sealing cap, associated packaging and / or dispensing device

Abstract

Container closure capsule, associated packaging and / or dispensing device. The closure capsule (20) is intended for a container intended to contain a cosmetic product, the capsule (20) comprising: an outer skirt (24) extending around a central axis (A-A'), defining an external surface (36), and an internal surface (34), a closing wall (22) which at least partially closes the outer skirt (24) along the connecting edge (30), a cylindrical inner skirt (26) extending around the central axis (A-A'), comprising a helical thread (46) projecting radially towards the central axis (A-A') from the internal face (42), and a connecting portion (28), radially joining the inner skirt (26) to the internal surface (34) of the outer skirt (24), the connecting portion (28) having a helical shape. Figure for the summary: Figure 2

Description

Title of the invention: Sealing cap for a container, associated packaging and / or dispensing device

[0001] The present invention relates to a sealing cap for a container intended to contain a cosmetic product comprising; - an outer cladding skirt extending around a central axis, defining an external surface, radially away from the central axis, and an internal surface, radially opposite to the external surface extending between a connecting edge and a free edge, - a closing panel that at least partially closes the outer skirt along the connecting edge, - an inner cylindrical skirt extending around the central axis, having an inner face oriented towards the central axis and an outer face extending opposite the inner surface of the outer cladding skirt, the inner skirt comprising a helical thread projecting radially towards the central axis from the inner face, and - a connecting section, radially joining the inner skirt to the inner surface of the outer skirt,

[0002] The cosmetic product is, for example, a hair product, a hygiene product, a face and / or body care product, a makeup product, or a sun protection product.

[0003] More generally, a cosmetic product is a product as defined in Regulation (EC) No 1223 / 2009 of the European Parliament and of the Council of 30 November 2009 on cosmetic products.

[0004] To seal a container holding a cosmetic product, it is known to equip the container with an external thread onto which an internal thread located inside a cap is engaged. Such a cap typically comprises an inner skirt receiving the internal thread and an outer skirt closed by a sealing wall, which the user rotates to engage or disengage the thread of the cap from that of the container.

[0005] The proposal of eco-responsible, environmentally friendly solutions whose design and development take into account environmental issues is becoming a major concern in order to help meet global challenges.

[0006] It is therefore essential to design more durable products, thereby reducing the amount of materials used.

[0007] In order to reduce the material required to manufacture the capsules, a hollow space can be provided between the two skirts, which are joined at the closure wall. Increasing the volume of this hollow space is useful for making the manufacturing process more economical and environmentally friendly.

[0008] Such capsules are often manufactured by injection molding of plastic material. In this case, the space between the two skirts is created by protrusions present in the mold. The threading of the inner skirt is notably achieved by a threaded core. The capsule must therefore be disengaged from the threaded core after solidification.

[0009] A torque is then applied to the capsule and / or to the core of the mold, which is applied at the level of the thread in the inner skirt. If the gap between the two skirts is large or if the connection between the inner skirt and the capsule is not rigid enough, this torque may be sufficient to irreversibly deform the thread.

[0010] The risk of irreversible deformation of the thread also exists when using the capsule, when a tightening or loosening torque is applied to the capsule by the user.

[0011] To overcome this problem, US6783014 discloses a capsule comprising an inner skirt and an outer skirt, as well as ribs located radially behind the inner skirt, which stiffen it. Thus, the capsule can be disengaged without damaging the threads of the inner skirt.

[0012] However, such a solution is not entirely satisfactory, as the junction zone between the inner skirt, the rib, and the closing wall is massive. Sink marks are likely to form there during the capsule's cooling process, leading to capsule brittleness. Furthermore, this detracts from its aesthetic appearance.

[0013] Furthermore, such a solution is not suitable for conical capsules that taper at the closing wall. Indeed, the protrusions intended to create the space between the two skirts must then have a shape that is too tapered to guarantee their durability.

[0014] In addition, the outer skirt is likely to flex and deform when a torque is applied to the capsule, so it is also desirable to stiffen it.

[0015] Other embodiments of sealing capsules provided with reinforcing ribs are described in JP6884476 and JP4729156.

[0016] An object of the invention is to provide a sealing cap for a container, the manufacture of which by injection is reliable and robust, the cap being economical and more environmentally friendly, while offering reliable operation when screwing or unscrewing and presenting a satisfactory aesthetic appearance.

[0017] For this purpose, the invention relates to a sealing capsule of the aforementioned type, characterized in that the connecting portion extends radially from the external face of the inner skirt and has a helical shape.

[0018] In the sealing capsule according to the invention, the inner skirt and the outer skirt are robustly connected, minimizing the amount of material required for this connection and avoiding the formation of massive areas likely to promote the formation of sink marks during the cooling of the material constituting the capsule following its manufacture by injection.

[0019] Indeed, the helical connecting portion has a shape that ensures the amount of material used to join the two skirts is precisely located along the thread, while providing robust support against radial deformation of the thread. Thus, the amount of material used to form the capsule is minimized, reducing its cost and environmental impact, without compromising its resistance to torsional torque during use and ensuring a satisfactory aesthetic appearance.

[0020] According to one variant, the connecting portion extends opposite the helical thread carried by the inner face of the inner skirt.

[0021] The connecting portion thus positioned specifically stiffens the thread, thereby increasing the torque that can be applied to the sealing cap without risking irreversible deformation or even thread breakage. The increased thread stiffness is achieved by using the connecting portion as a buttress between the outer and inner skirts, which limits the environmental impact and reduces material costs.

[0022] According to one variant, the connecting portion has a height, taken along the central axis, less than or equal to the height, taken along the central axis, of the helical thread.

[0023] Thus, the amount of material required to produce the connecting portion is minimized, which further reduces the cost and environmental impact of the sealing capsule, without compromising its robustness against torque applied during screwing or unscrewing.

[0024] According to one variant, the helical thread comprises several threads.

[0025] The presence of several threads on the helical thread increases the ease for the user to engage the cap on a corresponding thread by creating a plurality of given angular positions for which the thread can be engaged on the neck of the container.

[0026] This feature also makes it possible to increase, for a given number of turns, the stroke of the capsule compared to a single-threaded screw. Thus, the user can completely seal a container by applying a limited rotation of the sealing capsule.

[0027] According to one variant, each thread has an angular extent around the central axis equal to that of the or each other thread, the threads defining a helical thread extending angularly over an angle of at least 200° and in particular greater than or equal to 360° around the axis.

[0028] To seal the container, the user must align the start of a thread on the sealing cap with the start of a thread on the container. The user then rotates the sealing cap relative to the container. When all the threads have the same angular range, the angular distance the user must travel to engage a thread on the sealing cap with the container is reduced. This makes the sealing cap easier to use.

[0029] The angular range of the thread is at least 200° and in particular greater than 360° so that there is continuity of the thread in any angular position. Thus, the sealing cap uses a thread with a sufficient angular range to engage with the thread of the container neck to ensure the container is sealed when the cap is in its mounted position on the container.

[0030] According to one variant, the connecting portion comprises, for each thread, a helical connecting segment extending opposite the thread.

[0031] Each net thus has good rigidity thanks to the reinforcement of each connecting segment, this being obtained with a small amount of material.

[0032] According to one variant, the helical thread comprises at least a first and a second thread segment located in angular overlap in an overlap zone around the central axis, the connecting portion extending, in the overlap zone, opposite the first thread segment without extending opposite the second thread segment.

[0033] The absence of angular overlapping connecting portion in the overlap regions between the threads facilitates the manufacture of the part, in particular when it is molded, by avoiding or limiting the presence of undercut parts requiring complex mold movements.

[0034] According to one variant, the capsule includes at least one radial rib connecting the outer face of the inner skirt to the inner surface of the outer skirt, axially offset from the connecting portion along the central axis.

[0035] The radial rib improves the rigidity of both skirts. In particular, it prevents deformation of the outer skirt when the user applies pressure to it in order to exert a torque for engaging or disengaging the capsule.

[0036] According to one variant, the capsule comprises several radial ribs connecting the outer face of the inner skirt to the inner surface of the outer skirt, axially offset from the connecting portion along the central axis, the radial ribs being distributed angularly around the central axis.

[0037] The plurality of ribs improves the rigidity of the inner and outer skirts. In particular, the angular distribution prevents geometric defects from appearing at certain angular positions and ensures optimal stress distribution.

[0038] According to one variant, the inner skirt has an edge connected to the outer skirt and a free edge, the connecting portion extending between the connected edge and the free edge.

[0039] The presence of a free edge of the inner skirt defines a space between the inner skirt and the outer skirt, this space contributing to the reduction of material used.

[0040] According to one variant, the bound edge has a helical shape, the free edge extending in a plane perpendicular to the central axis.

[0041] The helical shape of the bound edge of the inner skirt ensures a reduction in the amount of material used to make the inner skirt compared to a bound edge which would extend in a plane parallel to the free edge.

[0042] According to one variant, the capsule includes at least one blocking relief of a sealing gasket projecting radially towards the central axis from the inner surface of the outer skirt, axially between the inner skirt and the closing wall.

[0043] The locking relief ensures the positioning of a sealing gasket which closes off the container is hermetically sealed. Thus, the seal prevents leakage of the cosmetic product contained in the container and protects the cosmetic product from contamination by external elements, such as humidity in the air.

[0044] According to one variant, the outer skirt has a non-cylindrical shape, in particular a truncated cone shape at the closing wall.

[0045] Since the outer skirt is a decorative skirt, its shape defines the aesthetics of the closure capsule. A non-cylindrical shape may be preferred, in order to differentiate the product or to adapt to the shape of the container.

[0046] According to one variant, the outer skirt, the inner skirt, the closing wall and the connecting portion are one piece, having been made from the same material.

[0047] The sealing capsule is therefore made from a single piece, thus avoiding the assembly of different elements. The sealing capsule is more economical and faster to manufacture.

[0048] The invention also relates to a device for packaging and / or dispensing cosmetic products comprising;

[0049] - a container defining a storage volume for cosmetic product, the container including a neck fitted with an external helical thread, the cosmetic product storage volume opening through the neck,

[0050] - a capsule as defined above, mounted on the neck by thread engagement helical of the inner skirt with the external thread of the neck.

[0051] The invention will become clearer upon reading the following description, given solely by way of non-limiting example, and made with reference to the accompanying drawings, in which:

[0052] - [Fig. 1] Fig. 1 is a schematic perspective view of a first device packaging of cosmetic products according to the invention;

[0053] - [Fig.2] [Fig.2] is a cross-sectional view along a median axial plane of the capsule of the closure of the device shown in [Fig.1];

[0054] - [Fig.3] [Fig.3] is a perspective view from below of the capsule shown on the [Fig.2];

[0055] - [Fig.4] [Fig.4] is a cross-sectional view, similar to [Fig.2], of a capsule sealing of a second cosmetic product packaging device according to the invention.

[0056] A first cosmetic product packaging device 10 according to the invention is illustrated in [Fig.1].

[0057] The cosmetic product intended to be packaged in the device 10 is, for example, a hair product, a hygiene product, a face and / or body care product, a makeup product, or a sun protection product.

[0058] The device 10 comprises a container 12, containing the cosmetic product and a capsule 20 according to the invention mounted on the container 12 to seal it.

[0059] The container 12 is, for example, a bottle or a jar. It comprises a base 14 and a side wall 16 which extends around a central axis A-A'. It defines a storage volume 18 receiving the cosmetic product.

[0060] The container 12 also defines an access opening to the storage volume 18, opposite the bottom 14 and advantageously located in a plane perpendicular to the central axis A-A', through which the storage volume 18 opens.

[0061] In what follows, the terms "external" and "internal" are generally understood with reference to the geometric center of the storage volume 18. In addition, the terms "radial" and "axial" are understood with reference to the central axis A-A'.

[0062] The container 12 comprises a neck (not visible) provided with an external helical thread (not shown) projecting radially outwards, advantageously being formed from the same material as the neck. The neck internally defines the access opening.

[0063] The capsule 20 is intended to selectively close the access opening by engaging on the external helical thread of the neck of the container 12, in a position mounted on the container 12.

[0064] The capsule 20 has a closing wall 22 extending substantially in a plane perpendicular to the central axis AA' in the mounted position.

[0065] With reference to [Fig. 2], the capsule 20 comprises an outer skirt 24 which projects from the closing wall 22 towards the bottom 14 when the capsule 20 is in its position mounted on the container 12, an inner skirt 26, comprising a helical thread 46, which extends around the central axis A-A' and a connecting portion 28 connecting the inner skirt 26 to the outer skirt 24.

[0066] The capsule 20 further includes at least one radial reinforcing rib 52 connecting the inner skirt 26 to the outer skirt 24 under the connecting portion 28, opposite the closing wall 22.

[0067] The closing wall 22 is intended to axially close the container 12. In its position mounted on the container 12, it extends opposite the bottom 14 of the container 12.

[0068] In the example shown in [Fig. 1], the closing wall 22 comprises, on the side opposite the bottom 14, a flat surface. The closing wall 22 advantageously comprises a fillet 23 at its periphery. The fillet 23 is intended to improve the user comfort of the capsule 20 by preventing the formation of a protruding edge that could be unpleasant for a user.

[0069] In an alternative (not shown), the closing wall 22 includes a decorative element, for example a logo or a distinctive sign, in particular produced by material removal.

[0070] The outer skirt 24 extends around the central axis A-A' between a connecting edge 30 to the closing wall 22 and a free edge 32. Here it extends in projection from the periphery of the closing wall 22 towards the container 12, when the capsule 20 is in its mounted position on the container 12.

[0071] The connecting edge 30 is sealed by the closing wall 22, as seen in [Fig. 2]. Alternatively, the connecting edge 30 of the outer skirt 24 is partially closed by the closing wall 22.

[0072] The outer skirt 24 has an inner surface 34 and an outer surface 36. Its thickness is defined as the radial distance between the inner surface 34 and the outer surface 36.

[0073] Preferably, the thickness of the outer skirt 24 and the thickness of the closing wall 22 are substantially equal. This avoids the formation of defects, such as sink marks, due to a significant variation in thickness during the manufacture of the part and ensures a uniform visual appearance.

[0074] In this example, the outer skirt 24 has a truncated cone shape at the closing wall 22. The diameter of the outer skirt 24 at the free edge 32 is greater than the diameter of the outer skirt 24 at the connecting edge 30.

[0075] With reference to [Fig.2], the outer skirt 24 here includes, on its inner surface 34, an annular relief 38 and spacers 40 for stiffening the relief 38.

[0076] The relief 38 extends radially towards the central axis A-A', being substantially contained in a radial plane with respect to the central axis A-A'. The relief 38 is located between the closing wall 22 and the inner skirt 26. It forms a blocking stop for a substantially flat sealing joint (not shown), adapted to be housed between the closing wall 22 and the relief 38.

[0077] The presence of a sealing ring in the capsule 20 hermetically seals the container 12, in particular when the latter receives a cosmetic product with a low viscosity.

[0078] The spacers 40 extend radially from the inner surface 34 of the outer skirt 24. They extend axially over the entire height between the closing wall 22 and the relief 38. The spacers 40 are distributed uniformly around the central axis A-A', so as to stiffen the relief 38.

[0079] Advantageously, the external surface 36 of the outer skirt 24 is a textured surface, for example a surface which has grooves intended to improve the grip by a user when engaging or disengaging the capsule 20 on the container 12.

[0080] The inner skirt 26 extends inside the outer skirt 24 around the central axis A-A'. It has a substantially cylindrical shape and comprises an inner face 42, provided with the helical thread 46, and an outer face 44 facing the outer skirt 24.

[0081] As illustrated in [Fig.2], the inner skirt 26 has a free edge 27, which extends in a plane perpendicular to the central axis A-A' and a bound edge 29 to the outer skirt 24, having a helical shape with axis the central axis AA' and pitch P. The bound edge 29 is here connected to the inner surface 34 of the outer skirt 24 by means of the connecting portion 28.

[0082] The helical thread 46 projects radially towards the central axis A-A' from the inner face 42 of the inner skirt 26. It is complementary in shape to the external helical thread (not shown) present on the neck of the container 12.

[0083] The helical thread 46 comprises at least one thread 48A, 48B, preferably several disjoint threads 48A, 48B and here, two disjoint threads 48A and 48B. Each thread 48A, 48B, is helical in shape with axis the central axis AA' and pitch P.

[0084] The threads 48A, 48B both have a trapezoidal profile in cross-section in a median axial plane. Alternatively, each thread 48A, 48B of the helical thread 46 has a profile other than a trapezoidal profile, for example a round profile.

[0085] The threads 48A, 48B have the same angular extent and the same height, taken along the central axis A-A'. The sum of the angular extents of each thread 48A, 48B is greater than 360°, as can be seen in [Fig.3].

[0086] This ensures that there is no angular discontinuity in the helical thread 46. There is therefore at least one overlap zone 50 in which two thread segments belonging to the threads 48A and 48B overlap angularly.

[0087] The outer face 44 of the inner skirt 26 is radially connected to the inner surface 34 of the outer skirt 24 by the connecting portion 28 of helical shape with axis the central axis AA' and of pitch P identical to that of the thread 48A, 48B.

[0088] This connecting portion 28 extends between the bound edge 29 and the free edge 27 of the inner skirt 26. The connecting portion 28 extends here from the bound edge 29.

[0089] As shown in [Fig.2], the connecting portion 28 has a helical shape which extends radially from the outer face 44 of the inner skirt 26 opposite the helical thread 46.

[0090] More specifically, the connecting portion 28 extends opposite each of the threads 48A, 48B of the helical thread 46. It therefore comprises, for each thread 48A, 48B, a helical connecting segment 31A, 31B extending respectively opposite the thread 48A, 48B to the opposite of the thread 48A, 48B, with respect to the inner skirt 26.

[0091] This arrangement of the connecting portion 28 ensures radial reinforcement of the helical thread 46 which increases the torque that can be applied to it, while minimizing the amount of material required for its production and avoiding the formation of defects, such as sink marks during the manufacture of the capsule.

[0092] In the overlapping areas 50, the connecting portion 28 extends only opposite one or the other of the segments of the threads 48A and 48B that overlap angularly, in order to avoid the formation of undercut areas. This facilitates the manufacture of the cap 20 by molding, in particular by plastic injection.

[0093] The inner skirt 26 has, in each overlap zone 50, an inner slope 51A connecting one of the threads 48A, 48B to the other thread.

[0094] The connecting portion 28 also has, in each overlap zone 50, an external slope 51B which links together the helical connecting segments 31 A, 31B, which ensures the continuity of the connecting portion 28.

[0095] The height of the connecting portion 28, taken along the central axis A-A', is less than or equal to the height of the helical thread 46, preferably less than or equal to the height of each thread 48A, 48B, taken along the central axis A-A'.

[0096] As illustrated in [Fig.2], the height of each segment 31A, 31B opposite a net 48A, 48B is equal to the height of the net 48A, 48B.

[0097] In this example, the capsule 20 has several radial ribs 52. The radial ribs 52 connect the outer face 44 of the inner skirt 26 to the inner surface 34 of the outer skirt 24 and are located axially away from the connecting portion 28.

[0098] The radial ribs 52 extend axially from the free edge 27 to the bound edge 29 having come from the material of the inner skirt 24 and / or with the outer skirt 26.

[0099] As can be seen in [Fig.3], the radial ribs 52 are distributed angularly around the central axis A-A', in order to ensure a homogeneous distribution of forces between the outer skirt 26 and the inner skirt 24 during the engagement or disengagement of the capsule 20 on the container 12.

[0100] In operation, during the first mounting of the capsule 20 on the neck, or during a subsequent disassembly / reassembly, a user or a robot engages each thread 48A, 48B of the helical thread 46 on the external helical thread of the neck.

[0101] A rotational driving torque of the capsule 20 around the central axis A-A' is then applied, to screw / unscrew the capsule 20 on the neck by cooperation between each thread 48A, 48B of the helical thread 46 and the external helical thread of the neck.

[0102] A segment 31 A, 31B of the connecting portion 50 being located just opposite each thread 48A, 48B, the inner skirt 28 is held firmly in radial position thanks to the reinforcement provided by the connecting portion 28 acting like a buttress between the inner skirt 26 and the outer skirt 24.

[0103] The capsule 20 remains lightweight since the connecting portion 50 only extends opposite each thread 48A, 48B. Empty spaces exist between the inner skirt 26 and the outer skirt 28 away from the connecting portion 50.

[0104] Advantageously, the outer skirt 24, the inner skirt 26, the closing wall 22 and the connecting portion 28 are single-piece units made from a single piece of material. For example, the capsule 20 is made by plastic injection molding. The manufacturing cost of a capsule 20 is therefore minimized since its production does not require an assembly step.

[0105] Figure 4 illustrates a capsule 20 having a helical thread 46 comprising a single thread 48 and a helical connecting portion 28 extending opposite thread 48.

[0106] The angular extent of the mesh 48 is greater than 360° and defines an angular overlap zone 50 of successive segments of the mesh 48. As before, in the overlap zone 50, the inner skirt 26 includes an internal slope 51A connecting the successive segments of the mesh 48. The connecting portion 28 extends opposite only one or the other of the segments of the mesh 48 that angularly overlap. The connecting portion 28 also has, in each overlap zone 50, an external slope 51B that links together the segments of the connecting portion 28 without overlap.

[0107] In one embodiment (not shown), the device 10 is a device for packaging and dispensing a cosmetic product.

[0108] The capsule 20 is then equipped with a dispensing system, for example a pump or a dispensing capsule, to convey a cosmetic product contained in the storage volume 18 of the container to the outside of the device 10. For this purpose, Capsule 20 has an opening, provided in the closing wall 22 to accommodate or delimit the distribution system.

[0109] For example, the dispensing system is a pump which, by pressing a push button, conveys the cosmetic product from the container 10 to an outlet nozzle by means of a cannula attached to the dispensing system, the cannula passing through the opening provided in the capsule 20. The outlet nozzle is located outside the closing wall 22 in order to allow the use of the cosmetic product by a user.

[0110] In all cases, the capsule 20 according to the invention makes it possible to effectively seal a container 12, thanks to its robust structure, while minimizing manufacturing costs and its environmental impact and ensuring satisfactory comfort, aesthetic appearance and ease of use.

Claims

Demands

1. Cap (20) for sealing a container (12) intended to contain a cosmetic product comprising; - an outer skirt (24) extending around a central axis (A-A'), defining an external surface (36), radially distant from the central axis (A-A'), and an internal surface (34), radially opposite the external surface, extending between a connecting edge (30) and a free edge (32), - a closing wall (22) that at least partially closes the outer skirt (24) along the connecting edge (30), - a cylindrical inner skirt (26) extending around the central axis (A-A'), having an internal face (42) oriented towards the central axis (A-A') and an external face (44) extending opposite the internal surface (34) of the outer skirt (24), the inner skirt (26) comprising a helical thread (46) projecting radially towards the central axis (A-A') from the internal face (42),and - a connecting portion (28), radially joining the inner skirt (26) to the internal surface (34) of the outer skirt (24), characterized in that the connecting portion (28) extends radially from the external face (44) of the inner skirt (26) and has a helical shape.

2. Capsule (20) according to claim 1, in which the connecting portion (28) extends opposite the helical thread (46) carried by the inner face (42) of the inner skirt (26).

3. Capsule (20) according to any one of claims 1 or 2, wherein the connecting portion (28) has a height, taken along the central axis (A-A'), less than or equal to the height, taken along the central axis (A-A'), of the helical thread (46).

4. Capsule (20) according to any one of the preceding claims, wherein the helical thread (46) comprises several threads (48).

5. Capsule (20) according to claim 4, wherein each thread (48) has an angular extent about the central axis (A-A') equal to that of the or each other thread (48), the threads (48) defining a helical thread (46) extending angularly over an angle of at least 200° and in particular greater than or equal to 360° about the axis (A-A').

6. Capsule (20) according to claim 4 or 5, wherein the connecting portion (28) comprises for each thread (48), a helical connecting segment (31) extending opposite the thread (48).

7. Capsule (20) according to any one of claims 4 to 6, wherein the helical thread (46) comprises at least a first and a second thread segment situated in angular overlap in an overlap zone (50) around the central axis (A-A'), the connecting portion (28) extending, in the overlap zone (50), opposite the first thread segment without extending opposite the second thread segment.

8. Capsule (20) according to any one of the preceding claims, comprising at least one radial rib (52) connecting the outer face (44) of the inner skirt (26) to the inner surface (34) of the outer skirt (24), axially offset from the connecting portion (28) along the central axis (A-A').

9. Capsule (20) according to claim 8, comprising several radial ribs (52) connecting the outer face (44) of the inner skirt (26) to the inner surface (34) of the outer skirt (24), axially spaced from the connecting portion (28) along the central axis (A-A'), the radial ribs (52) being distributed angularly around the central axis (A-A').

10. Capsule (20) according to any one of the preceding claims, wherein the inner skirt (26) has an edge bound (29) to the outer skirt and a free edge (27), the connecting portion (28) extending between the bound edge (29) and the free edge (27).

11. Capsule (20) according to claim 10, wherein the bound edge (29) has a helical shape, the free edge (27) extending in a plane perpendicular to the central axis (A-A').

12. Capsule (20) according to any one of the preceding claims, comprising at least one locking relief (38) of a sealing gasket projecting radially towards the central axis (A-A') at starting from the inner surface (34) of the outer skirt (24), axially between the inner skirt (26) and the closing wall (22).

13. Capsule (20) according to any one of the preceding claims, wherein the outer skirt (24) has a non-cylindrical shape, in particular a truncated cone shape at the closing wall (22).

14. Capsule (20) according to any one of the preceding claims, wherein the outer skirt (24), the inner skirt (26), the closing wall (22) and the connecting portion (28) are one piece, having been made of the same material.

15. Device (10) for packaging and / or dispensing cosmetic product, comprising: - a container (12) defining a storage volume (18) of cosmetic product, the container (12) comprising a neck having an external helical thread, the storage volume (18) of cosmetic product opening through the neck, - a cap (20) according to any one of the preceding claims, mounted on the neck by engagement of the helical thread (46) of the inner skirt (26) with the external thread of the neck.

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