Device for packaging and applying a cosmetic product comprising a phase in the form of beads

Abstract

A device (10) for packaging and applying a cosmetic product (P) is proposed, comprising an application device (14) and a reservoir (12), the reservoir (12) defining: a first cavity (16), intended to receive a cosmetic product (P) comprising a first phase (L) and a second phase comprising beads (B) immiscible in the first phase (L), the first cavity (16) receiving at least one helix (46; 48), mounted freely in rotation about an axis of rotation (A), and a grid (40), substantially normal to the axis of rotation of the helix (46; 48), the helix (46; 48) and the grid (40) being shaped to shear the beads (B) driven through the grid (40), by the rotation of the helix (46; 48); and a second cavity (18) in fluid communication with the first cavity through the grid (40). Abstract Figure: Figure 2

Description

Title of the invention: Device for packaging and applying a cosmetic product comprising a phase in the form of beads Technical field

[0001] The present disclosure relates to the field of devices for packaging and applying cosmetic products intended to be applied to keratin materials. The present disclosure relates more specifically to a device for packaging and applying a cosmetic product comprising two phases, a first phase of which is in the form of a liquid or gel, and a second phase comprising beads which are immiscible in the first phase. The present disclosure also relates to a method for applying such a cosmetic product by means of such a packaging and application device. Prior art

[0002] A device for packaging and applying a cosmetic product conventionally comprises a reservoir, receiving the cosmetic product to be applied, and an application device. The application device can be received in the reservoir to load an application element of the application device with cosmetic product. The cosmetic product is for example a mascara, a gloss or a nail polish. The cosmetic product is then applied by rubbing the application element on keratin materials, such as the lips, nails, eyelashes, eyebrows or the skin, in particular the eyelids or the eye contour.

[0003] However, there are cosmetic products comprising two phases. The first phase is in particular in the form of a gel or a liquid in which the second phase is dispersed in the form of beads. The beads can in particular be formed because the first and second phases are not miscible, at least at rest. The cosmetic product then takes the form of an emulsion.

[0004] In the case where the cosmetic product comprises two phases which are immiscible at rest or difficult to miscible, it is known to mix the cosmetic product just before use.

[0005] Thus, document US-B-10,039,363 describes a packaging and application device comprising a reservoir, containing the cosmetic product, and an application device. The application device comprises a cap, shaped to be screwed onto the reservoir so as to close the reservoir, an application element, intended to be immersed in the reservoir to be loaded with cosmetic product to be applied, and a rod connecting the cap to the application element. The device also comprises at least one helix, extending over several turns, on the entire height of the tank. The propeller is mounted pivoting around its axis, in the tank. The propeller is fixed to a plate with a square-section opening. The rod has a twisted shape, with a square section complementary to the section of the plate opening. Thus, once the cap is unscrewed, a back and forth movement of the rod through the hole in the plate causes the plate to rotate. The propeller is thus also rotated and allows the cosmetic product contained in the tank to be mixed.

[0006] This device effectively allows the two phases of a two-phase cosmetic product to be mixed. However, this mixing is not very efficient and beads may remain in the cosmetic product taken. The diameter of the beads which remain in the cosmetic product taken may be relatively large. This is detrimental to the quality of the application of the cosmetic product to the keratin material.

[0007] Furthermore, by construction, the application element of this device is of smaller width than the rod, which makes the application of the cosmetic product delicate.

[0008] Finally, cosmetic products are known in which the beads of the second phase are relatively resistant. In particular, the beads may comprise a solid or gel-like envelope to protect the product contained in the beads of the second phase. The device described in US-B-10,039,363 is not suitable for this type of cosmetic product, since simple mixing does not, a priori, allow the beads to be broken in the fluid or gel.

[0009] There is therefore a need for a packaging and application device which does not have at least some of the drawbacks of the prior art.

[0010] Furthermore, document FR-A-2 994 536 describes an example of a device for packaging and dispensing a fluid composition comprising a container containing a heterogeneous mixture comprising suspended particles, a delivery element, arranged in the container, for transforming the heterogeneous mixture into a fluid composition, and a pump for dispensing the fluid composition out of the device. The delivery element comprises a fluid guide conduit, comprising an upstream opening opening into the container, a central passage, and a downstream opening connected to the pump. The delivery element also comprises a filtration member mounted in the guide conduit. The filtration member is configured so that the heterogeneous mixture introduced into the guide conduit through the upstream opening passes through the filtration member.The filtration member comprises at least one filtration wall forming a non-zero angle with a perpendicular to the axis of the guide duct. Summary

[0011] A device for packaging and applying a cosmetic product is provided, comprising an application device with an application element for apply the cosmetic product to keratin materials, and a reservoir, to receive the cosmetic product, the reservoir defining: - a first cavity, intended to receive a cosmetic product comprising a first phase in the form of a liquid or gel, and a second phase comprising beads immiscible in the first phase, the first cavity receiving at least one helix, mounted freely to rotate around an axis of rotation, and a grid, substantially normal to the axis of rotation of the helix, with at least one hole, preferably a plurality of holes, a portion of the helix being, more preferably, in contact with the grid, the helix and the grid being shaped to shear the beads driven through the grid, by the rotation of the helix; and - a second cavity in fluid communication with the first cavity through the grid, the reservoir and the application device being shaped to allow the application element to be loaded with cosmetic product from the second cavity.

[0012] Thus, advantageously, the beads contained in the cosmetic product can be sheared when they pass through the grid, such that the second cavity can contain more homogeneous cosmetic product than the cosmetic product included in the first cavity.

[0013] The cosmetic product packaging and dispensing device may comprise one or more of the following features, taken alone or in combination: - the propeller comprises a heliocoidal portion extending over an angular sector, relative to the axis of rotation of the propeller, of between 90° and 240°; - the propeller comprises a flat portion, normal to the axis of rotation of the propeller, preferably extending over an angular sector, relative to the axis, of between 1° and 60°, the flat portion preferably being in contact with the grid; - the device comprises several coaxial propellers, in particular two propellers; - the grid is annular, with its axis being the axis of rotation of the propeller, the external diameter of the grid preferably being substantially equal to the external diameter of the propeller; - the propeller is in contact with a wall delimiting the first cavity, the first cavity preferably being cylindrical, with a diameter substantially equal to the external diameter of the propeller; - a hollow shaft forms a conduit connecting the second cavity to an opening of the tank, preferably through the first cavity; - the application device further comprises a gripping member and a rod connecting the gripping member to the application element; - the gripping member is capable of being fixed to the tank to close the opening of the tank, the rod extending at least partly into the conduit when the gripping member grip is fixed on the tank; - the gripping member is capable of being screwed onto the tank, the tank having a thread, the thread of the tank preferably extending in a direction opposite to the propeller - the device further comprises a drive device capable of driving the propeller in rotation relative to the grid, around the axis of the tank; - the drive device comprises the gripping member and the rod of the application device, the rod comprising first reliefs and a wall of the conduit comprising second reliefs shaped to be engaged in rotation by the first reliefs in at least one direction of rotation of the rod around the axis of rotation of the propeller, the rotation of the gripping member around the axis of the propeller in said at least one direction causing rotation of the propeller, the first reliefs preferably extending over only a portion of the rod and / or the second reliefs preferably extending over only a portion of the wall of the conduit of the hollow shaft; - a bottom of the first cavity has a ring allowing the rod to pass through; - a spin ring is received in the ring to form an extension of the conduit opening into the second cavity; - the application element projects from the conduit into the second cavity, and from the wringer ring where applicable, when the gripping member is fixed to the reservoir; - the reservoir comprises a socket defining, at least in part, the first cavity, and a base defining the second cavity, the base being fixed to the socket; - the tank further comprises a collar, fixed on one end of the socket, opposite the base, the collar defining the opening of the tank; - the reservoir, in particular the socket and / or the base, where applicable, is / are, at least in part, transparent or translucent, preferably made of glass or transparent plastic material; - the reservoir, in particular the first cavity, contains cosmetic product, the cosmetic product comprising at least two phases, a first phase being in the form of liquid or gel, and a second phase comprising beads immiscible in the first phase, the at least one hole in the grid having a diameter less than the average diameter of the beads of the second phase.

[0014] According to another aspect, there is described a method of applying a cosmetic product by means of the cosmetic product packaging and application device, comprising the steps of: i) shearing balls contained in the first cavity by rotating the propeller; (ii) loading the application element of the application device with cosmetic product taken from the second cavity; and iii) applying the cosmetic product taken in step ii) to keratin materials, using the application element of the application device. Optionally, step i) consists of screwing the application device onto the tank or unscrewing the application device from the tank. Brief description of the drawings

[0015] Other characteristics, details and advantages will appear on reading the detailed description below, and on analyzing the attached drawings, in which:

[0016] [Fig-1] schematically represents from the front an example of a conditioning device operation and application of cosmetic products.

[0017] [Fig.2] schematically represents an exploded perspective view of a subassembly of a reservoir which can be implemented in the cosmetic product packaging and application device of [Fig.l].

[0018] [Fig.3] schematically represents a longitudinal sectional view of the subassembly of [Fig.2].

[0019] [Fig.4A] schematically represents a detail of the tank subassembly of Figures 2 and 3.

[0020] [Fig.4B] schematically represents the detail of [Fig.4A], according to a different orientation.

[0021] [Fig.5] schematically represents a longitudinal sectional view of a tank implementing the subassembly of figures 2, 3 and 4.

[0022] [Fig.6] schematically represents an exploded perspective view of a subassembly of the tank of [Fig.5].

[0023] [Fig.7] schematically represents a longitudinal sectional view of the device for packaging and applying cosmetic product of [Fig.l].

[0024] [Fig.8] schematically represents a perspective view of an application device that can be implemented in the cosmetic product packaging and application device of [Fig.l].

[0025] [Fig.9] schematically represents a top view of a grid which can be implemented in the subassembly of figures 5 and 6.

[0026] [Fig. 10] schematically represents a detail of [Fig.9]. Description of the embodiments

[0027] As illustrated in [Fig.l], a cosmetic product packaging and application device 10 essentially comprises a cosmetic product reservoir 12 and an application device 14.

[0028] The reservoir 12 contains a cosmetic product P comprising two phases. A first phase L is in the form of a liquid or gel, that is to say a more or less liquid less viscous. The second phase comprises B beads immiscible in the first phase L.

[0029] The cosmetic product P contained in the reservoir 12 of the device 10 is for example a cosmetic product intended to be applied to keratin materials. The cosmetic product P is for example a makeup product, such as a gloss or a mascara, a product for nail care and makeup, such as a varnish. The cosmetic product P is for example intended to be applied to the lips, eyelashes, eyebrows, nails and / or the skin, in particular the eyelids and / or the eye contour.

[0030] The cosmetic product P advantageously comprises a continuous medium L in the form of a more or less viscous composition, in particular in the form of a gel, homogeneous, without macroscopic particles in suspension. By "macroscopic particles" is meant in particular a particle whose largest transverse dimension is greater than 200 μm, in particular greater than 500 μm. The fluid composition L of the cosmetic product P is thus advantageously in the form of a first pure liquid fluid, a solution of a fluid in a liquid solvent, or a dispersion such as an emulsion or a suspension of fluid in a liquid, the dispersed elements being invisible to the naked eye. The viscosity of the fluid composition L is for example between 50 mPa.s and 20,000 mPa.s. In particular, this viscosity is between 2,000 mPa.s and 15,000 mPa.s. This viscosity is measured by the following method.

[0031] A Brookfield DV-II type viscometer is used with a spindle of size (No.) 05. Approximately 150 g of composition L are placed in a beaker of 250 mL volume, having a diameter of approximately 7 cm so that the height of the volume occupied by the 150 g of composition L is sufficient to reach a gauge marked on the spindle. Then, the viscometer is started at a speed of 10 RPM and waited for the value displayed on the screen to be stable.

[0032] The cosmetic product P comprises, in addition to the continuous medium L, a plurality of beads B (or particles) suspended in the continuous medium L. The mass fraction of beads B in the cosmetic product P, taken as the total mass of the beads B relative to the sum of the masses of the beads B and the continuous medium L, is greater than 1%, advantageously greater than 10%, in particular 20% or even 50%. The beads B are macroscopic. The beads B are thus visible to the naked eye. The average diameter D of the beads B is, for example, greater than 0.5 mm, preferably greater than 2 mm and / or less than 8 mm, preferably less than 5 mm. The beads B are advantageously deformable, in particular elastically or plastically deformable over a deformation range greater than 5% in compression between two flat surfaces. Alternatively, the beads B are solid, and have very low deformation, in particular less than 1%.

[0033] The deformation of the balls B is characterized by an increase in the Make of the balls B, following the application of a mass on a series of balls B. The observation of the deformation of the balls B is for example carried out using the following assembly. The samples comprising six balls B are placed on a transparent glass plate. A first image is recorded in order to be able to measure the initial area of the balls B. Then a second glass plate is placed on the balls B, and the weight is adjusted so that the mass of the second glass plate plus the ballast corresponds to 100 times the mass of the initial sample (i.e. 600 times the weight of a ball B). A second image is recorded 5 minutes after having ballasted the second glass plate. The recorded images are subsequently processed by computer. The measurement of the areas before and after deformation are obtained, for example in pixels.The value averaged over the number of samples of the ratios (final area - initial area) / initial area, corresponds to the deformation value.

[0034] In a first example, all the beads B are similar or analogous. In this case, all the beads B are of identical composition. Alternatively, however, the cosmetic product P may comprise several types of beads B, in particular of different compositions. The beads B are preferably homogeneous. Thus, preferably, the beads B do not comprise an envelope, in particular a gelled envelope. The beads B may also have identical or different geometries.

[0035] Advantageously, the beads B are mono-dispersed. By "mono-dispersed" is meant that the beads B have a coefficient of variation Cv in size of less than 10%. To calculate the coefficient of variation Cv, the average diameter D of the beads is for example measured. The diameter Di of each bead is measured, then the average diameter D is obtained by calculating the arithmetic mean of these Di values. From these Di values, it is also possible to obtain the standard deviation of the diameters Di of the beads B of the dispersion. To characterize the "mono-dispersity" of the beads B according to this example, it is possible to calculate the coefficient of variation Cv equal to the ratio of the standard deviation to the average diameter D of the beads B. The coefficient of variation Cv of the diameters Di of the beads B of the population according to this example is less than 10%, preferably less than 5%.

[0036] In a particular example, the continuous medium L is formed by a gelled solution, for example by an aqueous gel, in particular alone or in combination, a gel of hyaluronic acid, xanthan, polysaccharides, cellulose, guar gum or even oligogelin. The viscosity of the continuous medium L is here greater than 1,000 mPa.s, in particular between 3,000 mPa.s and 10,000 mPa.s. The continuous medium L thus has the consistency of a gel, sufficiently viscous to allow the suspension of the beads B. However, it is also sufficiently shear-thinning to carry the beads B with it during its distribution.

[0037] According to the example illustrated, the reservoir 12 has an external shape with symmetry of revolution, with the axis being the median axis A of the reservoir 12 (hereinafter the axis A of the reservoir 12).

[0038] As more visible in [Fig.2], the reservoir 12 may comprise a hoop 34, a sleeve 36 and a base 38 extending in this order in the direction of the axis A, between an opening 20 and a bottom 22 of the reservoir 12. The assembly of the device 10 is facilitated when the reservoir 12 is made up of the hoop 34, the sleeve 36 and the base 38.

[0039] The hoop 34 comprises a neck 341, extending from one end defining the opening 20 of the reservoir 12, to a shoulder 343, normal to the axis A of the reservoir 12. The shoulder 343 connects the neck 341 to the upper end of a body 342 of the hoop 34. The neck 341 has a threaded outer wall, intended to cooperate with a complementary tapping of the application device 14.

[0040] The sleeve 36 is generally cylindrical, here of circular section. The external diameter D36 of the sleeve 36 is substantially equal to the external diameter D342 of the body 342 of the ferrule 34. Furthermore, the sleeve 36 comprises, on each of its axial ends, a threaded portion 361, 362, intended to cooperate with a threaded internal wall of the body 342 of the ferrule 34 and a threaded internal wall of the base 38 respectively. This makes it possible to obtain an aesthetic appearance of the reservoir 12 when the ferrule 34 and the base 38 are screwed onto the sleeve 36.

[0041] The base 38 comprises a tip 381. The outside diameter D381 of the tip 381 is substantially equal to the outside diameter D36 of the sleeve 36. The base 38 also comprises a frustoconical portion 382, here of circular section. The outside diameter D382 of the frustoconical portion 382 decreases from its end in the vicinity of the sleeve 36 to the bottom 22 of the reservoir 12. The base 38 further comprises a flat section 383, normal to the axis A of the reservoir 12, closing the reservoir 12.

[0042] The sleeve 36 and the base 38 may be made of the same material. The sleeve 36 and the base 38 may be made of a transparent or translucent material. This allows the user to see the cosmetic product received in the reservoir 12, and to obtain an aesthetic effect from the reservoir 12.

[0043] Alternatively, the socket 36 and the base 38 may be made of different materials. The socket 36 may, for example, be made of a transparent material and the base 38 of an opaque material. Conversely, the base 38 may be made of a transparent material and the socket 36 of an opaque material. A transparent window may be provided on the socket 36 and / or the base 38 allowing the user to see the cosmetic product.

[0044] The hoop 34, the sleeve 36 and the base 38 may in particular be made of one of: a polyolefin, a copolyester, polybutylene terephthalate (PBT), polyamide, glass, a metal or any other material accessible to those skilled in the art.

[0045] As more clearly visible in [Fig.3], the reservoir 12 can define two cavities 16, 18. The cavities 16, 18 extend one after the other, from the opening 20 of the reservoir 12 to the bottom 22 of the reservoir 12. The cavities 16, 18 are coaxial, with their axis being the median axis A of the reservoir 12.

[0046] The first cavity 16 comprises a first portion 161, opening onto a second portion 162. The first portion 161 is defined by the neck 341 of the hoop 34. The second portion 162 is defined by the sleeve 36. The first and second portions 161, 162 are cylindrical, here of circular section. The diameter D161 of the first portion 161 is less than the diameter DI62 of the second portion 162.

[0047] The second cavity 18 is defined by the base 38 of the reservoir 12. The second cavity 18 here takes the form of a truncated cone. Thus, the diameter of the second cavity 18 decreases from a diameter DI8, substantially equal to the diameter DI62 of the second portion 162, to a smaller diameter El8, in the vicinity of the bottom 22 of the reservoir 12.

[0048] As more visible in [Fig.4A], a bottom 35 of the sleeve 36 forms a ring 28. The ring 28 is located between the first and second cavities 16, 18. The bottom 35 of the sleeve 36 also comprises an annular bead 30, on the radially external wall of the ring 28. It should be noted that here, the ring 28 extends axially in the direction of the axis A of the reservoir 12, on either side of the annular bead 30, as is visible in [Fig.4B]. The bottom 35 of the sleeve 36 also comprises arms 24. The arms 24 extend radially from the annular bead 30 to the internal wall 121 of the reservoir 12, formed here by the sleeve 36. Thus, the arms 24 make it possible to hold the ring 28 in position relative to the sleeve 36. Here, the bottom 35 of the sleeve 36 has four arms 24. The arms 24 can be regularly distributed angularly around the axis A of the reservoir 12.

[0049] Furthermore, as visible in [Fig.4B], recesses 32 are here formed on the radially external surface of the ring 28. The recesses 32 here have a section in the shape of a semicircle. The recesses 32 extend parallel to the direction of the axis A of the reservoir 12. Here, four recesses 32 are regularly distributed angularly around the axis A of the reservoir 12. Each recess 32 is thus produced in the extension of an arm 24.

[0050] In the example illustrated, the recesses 32 are formed in the extension of openings 33, extending through the bottom of the sleeve 36, in particular through the annular bead 30. The openings 33 thus form recesses 32, 37 on the ring 28, on either side of the bead 30. This is an example of a way of producing the recesses 32 at the bottom of the sleeve 36. Since the bottom of the sleeve 36 is difficult to reach, the recesses 32 can be produced by piercing the bottom of the sleeve 36, from its visible face in [Fig.4A] or by providing a projecting relief in the mold, if the sleeve 36 is produced by molding. Other ways of producing the recesses 32 are however accessible to those skilled in the art, who can in particular allowing the socket 36 not to have a recess 37 and / or openings 33, on its external face visible in [Fig.4A].

[0051] As illustrated in Figures 5 and 6, the reservoir 12 further comprises a grid 40. The grid 40 is received in the first cavity 16. The grid 40 can in particular rest on the arms 24 and the annular bead 30. The grid 40 then rests on the face of the arms 24 and the annular bead 30 visible in [Fig.4B].

[0052] The grid 40 here comprises a plurality of holes 44. As illustrated, the holes 44 are of circular section. However, the holes 44 may have a different section, for example the holes 44 may be of polygonal section. The holes 44 here are all of the same diameter D44. By “diameter” of a hole 44, is meant here, in the broad sense, the greatest distance measured between two points of the section of the hole 44. The diameter D44 of the holes 44 is less than the average diameter D of the balls B of the cosmetic product P. The diameter D44 of the holes 44, relative to the average diameter D of the balls B, D44 / D, is less than 0.8, or even less than 0.5. For example, the diameter D44 of the holes 44 is greater than or equal to 0.3 mm. The diameter D44 of the holes 44 is less than or equal to 0.5 mm. The diameter D44 of the holes 44 is notably 0.4 mm.

[0053] The holes 44 may or may not be regularly distributed over the surface of the grid 40. For example, the holes 44 are regularly distributed angularly on concentric circles, such that the minimum distance 144 between two neighboring holes 44, belonging to two distinct concentric circles, is equal to the radius of a hole 44.

[0054] The grid 40 is here of generally annular shape. The external diameter D40 of the grid 40 is substantially equal to the diameter DI62 of the second portion 162 of the first cavity 16. Furthermore, the internal diameter E40 of the grid 40 is substantially equal to the external diameter E28 of the ring 28. This allows the grid 40 to rest on the bead 30 surrounding the ring 28 at the bottom 35 of the sleeve 36.

[0055] The grid 40 also comprises internal radial projections 42. Here, the grid 40 comprises four radial projections 42, regularly distributed angularly around the axis A of the reservoir 12. The radial projections 42 are intended to be received in the recesses 32 formed on the ring 28, on the face of the ring 28, visible in [Fig.4B]. The radial projections 42, received in the recesses 32, thus make it possible to limit, or even avoid, rotation of the grid 40 in the reservoir 12.

[0056] The reservoir 12 further comprises two helices 46, 48. By helix is meant here a blade of which at least one portion extends along a main line of helical extension. The two helices 46, 48 are received in the first cavity 16, opposite the grid 40. The two helices 46, 48 are coaxial, with axis A of the reservoir 12.

[0057] Here, each helix 46, 48 comprises a helical portion 50 extending along a main line of helical extension, over an angular sector, around the axis A of the reservoir 12. The amplitude of the angular sector is preferably greater than or equal to 90° and / or less than or equal to 180°.

[0058] Each helix 46, 48 also comprises a planar portion 52. The planar portion 52 extends from one end of the helical portion 50 in the vicinity of the grid 40. The planar portion 52 may be rectangular, extending over a length of between 0.2 mm and 5 mm. The planar portion 52 may alternatively have the shape of a ring portion, i.e. an angular section of a ring. The planar portion 52 then extends, for example, over an angular sector of between 1° and 60°. For example, the planar portion 52 extends over an angular sector of 30°.

[0059] The two helices 46, 48 are here separated by two windows 54, extending essentially orthoradially between the ends of the helices 46, 48. Furthermore, here, two ends of the helices 46, 48 separated by a window 54 are arranged at different levels along the axis A of rotation of the helices 46, 48. However, these ends do not overlap, here, in the direction of the axis A of rotation of the helices 46, 48.

[0060] Here, each helix 46, 48 is in contact with the grid 40 over the entire flat portion 52. The flat portion 52, in contact with the grid 40, can thus make it possible to scrape the surface of the grid 40. The other end of each helix 46, 48 is distant, in the direction of the axis A of the reservoir 12, from the grid 40. The distance separating the end in contact with the grid 40 and the other end of each helix 46, 48 in the direction of the axis A is greater than the average diameter D of the balls B of the cosmetic product P.

[0061] Here, the propellers 46, 48 are oriented in the same direction. In other words, when traveling along the axis A of the tank 12 in one direction, the two propellers 46, 48 rotate in the same direction. In other words again, when traveling along the two propellers 46, 48 in the same direction of rotation around the axis A of the tank, the two propellers move in the same direction in the direction of the axis A.

[0062] More particularly, here, the helices 46, 48 are oriented in a direction opposite to the direction of the thread on the hoop 34. In other words, by traveling along the axis A of the reservoir in one direction, the two helices 46, 48 here turn in a direction opposite to that of the thread on the hoop 34.

[0063] Each helix 46, 48 has an outside diameter D46, D48 substantially equal to the diameter DI62 of the second portion 162 of the first cavity 16. Thus, each helix 46, 48 is in contact with the wall delimiting the second portion 162 of the first cavity 16. This prevents balls from being able to bypass the helixes 46, 48 and remain trapped between the helixes 46, 48 and the wall delimiting the second portion 162 of the first cavity 16.

[0064] The propellers 46, 48 are integral with a shaft 56. Here, the propellers 46, 48 are made of the same material as the shaft 56. The shaft 56 extends here in the direction of the axis A of the reservoir 12, through the first cavity 16.

[0065] The shaft 56 is hollow here. The shaft 56 thus has a through opening 60. The through opening 60 here extends axially through the shaft 56. The shaft thus partially defines a conduit 62. The conduit 62 extends, on either side of the through opening 60, by the first portion 161 of the first cavity 16, on the one hand, and by the space delimited in the center of the ring 28 at the bottom 35 of the sleeve 36, on the other hand.

[0066] The diameter D60 of the through opening 60 is substantially equal to the internal diameter d28 of the ring 28 and to the diameter D161 of the first portion 161 of the first cavity 16.

[0067] Furthermore, an internal wall 561 of the shaft 56 comprises longitudinal ribs 64. As illustrated, the longitudinal ribs 64 are in the vicinity of the opening 20 of the reservoir 12. In the example illustrated, the internal wall 561 comprises six longitudinal ribs 64, regularly distributed angularly around the axis A of the reservoir 12. The longitudinal ribs 64 extend here parallel to the direction of the axis A of the reservoir 12. The longitudinal ribs 64 cooperate with complementary grooves 74 of the application device 14, to secure in rotation around the axis A, the application device 14 and the shaft 56. Of course, other means known to those skilled in the art can be envisaged to secure in rotation the application device 14 and the shaft 56 around the axis HAS.

[0068] Furthermore, a first end of the shaft 56, distant from the propellers 46, 48, here has a crown 58. The crown 58 is coaxial with the through opening 60 of the shaft 56, with axis the axis A of the reservoir 12. In the example illustrated, the crown 58 is connected to the outer wall 562 of the shaft 56 by arms 59. The outer diameter D58 of the crown 58 is substantially equal to the diameter DI62 of the second portion 162 of the first cavity 16. This ensures that the shaft 56 is held in position in the first cavity 16.

[0069] The second end of the shaft 56, in the vicinity of the propellers 46, 48, bears on the annular bead 30 around the ring 28, at the bottom 35 of the sleeve 36. In doing so, the second end of the shaft 56 sandwiches, with the annular bead 30, the radial projections 42 of the grid 40.

[0070] Furthermore, the internal wall of the shaft 56 comprises, in the vicinity of the propellers 46, 48, an annular rib 65. Thus, a wiping ring 66 is sandwiched between the annular rib 65 and the ring 28 at the bottom 35 of the sleeve 36. As illustrated, the wiping ring 66 extends here from the annular rib 65 inside the shaft 56, to the inside of the second cavity 18. The wiping ring 66 thus defines a portion of the conduit 62. The conduit 62 thus places the second cavity 18 in fluid communication with the opening 20 of the reservoir 12. The conduit 62 is preferably devoid of any opening other than its outlets at its axial ends. The conduit 62 is thus isolated, in particular, from the second portion 162 of the first cavity 16, by shaft 56.

[0071] As illustrated, the wiping ring 66 comprises a cylindrical portion 661, here of annular section. The outer diameter D66 of the wiping ring 66 is equal to the inner diameter d28 of the ring 28 of the reservoir 12. One end of the wiping ring 66 comprises a rim 67, radially external to the cylindrical portion 661. The rim 67 is sandwiched between the annular rib 65 inside the shaft 56 and the ring 28 at the bottom 35 of the sleeve 36. The wiping ring 66 finally comprises a frustoconical portion 662, extending from the end of the cylindrical portion 661 opposite the rim 67. The frustoconical portion 662 opens into the second cavity 18.

[0072] The wring ring 66 may in particular be made of plastic, more particularly of elastomer, for example of one of: a polyolefin, a thermoplastic polyurethane (TPU), a thermoplastic elastomer (TPE) or a silicone.

[0073] In the following, the application device 14 is described in more detail. In the example visible in [Fig.8], the application device 14 comprises an application element 76, a gripping member 68 and a rod 72 connecting the application element 76 and the gripping member 68.

[0074] The gripping member 68 here allows, in addition to gripping the application device 14, to plug the opening 20 of the reservoir 12. To do this, the gripping member 68 is adapted to be fixed to the reservoir 12, in particular to the hoop 34. For this purpose, the gripping member 68 here comprises a tapping complementary to the thread on the neck 341 of the hoop 34. Other means of fixing the gripping member 68 to the reservoir 12 are however accessible to those skilled in the art.

[0075] The rod 72 comprises a first cylindrical portion 721 and a second cylindrical portion 722, connected by a frustoconical portion 723. The first cylindrical portion 721 comprises the grooves 74 intended to cooperate with the longitudinal ribs 64 inside the shaft 56. The first cylindrical portion 721 thus has a diameter D721 substantially equal to the diameter D60 of the conduit 62.

[0076] The first cylindrical portion 721 here extends over a length L721 substantially equal to the sum of the heights H161 of the first portion 161 of the first cavity 16 and H64 of the longitudinal ribs 64 of the shaft 56. Thus, the application device 14 and the pair of propellers 46, 48 are secured in rotation, as long as the gripping member 68 is partly screwed onto the reservoir 12.

[0077] Advantageously, the second cylindrical portion 722 has a diameter smaller than the diameter of the first cylindrical portion 721 of the rod 72. This facilitates the removal of the application device 14.

[0078] The application element 76 is fixed to the free end of the second cylindrical portion 722 of the rod 72. When the application device 14 is fixed on the reservoir 12, the application element 76 is received in the second cavity 18, the rod 72 passing through the entire conduit 62 between the opening 20 of the reservoir 12 and the outlet of the wiping ring 66 in the second cavity 18. The application element 76 can thus be loaded with cosmetic product contained in the second cavity 18 when the application device 14 is fixed to the reservoir 12. The application element 76 is then isolated from the first cavity 16 by the conduit 62 of the reservoir 12.

[0079] The application element 76 can have any desired shape, allowing satisfactory application of the cosmetic product P. Generally, the application element 76 is adapted to the cosmetic product P contained in the reservoir 12. For example, the application element 76 can be a brush for mascara, a brush for varnish, a spatula or a foam tip for a cosmetic product intended to be applied to the skin.

[0080] The application element 76 may be integral with the rod 72. The application element 76 may also be fixed to the rod 72 by gluing, screwing, clipping or any other means accessible to those skilled in the art.

[0081] The device 10 can be implemented in the following manner.

[0082] A user grasps the reservoir 12 with a first hand, and the gripping member 68 of the application device 14 with his second hand. The user then pivots the gripping member 68 relative to the reservoir 12, around the axis A of rotation, here in the counterclockwise direction. He thus unscrews the application device 14 from the reservoir 12.

[0083] The rotation of the gripping member 68 also causes the propellers 46, 48 in the reservoir 12 to pivot counterclockwise around the axis A. The rotation of the propellers 46, 48 is due to the cooperation between the ribs 64 of the shaft 56 and the grooves 74 of the rod 72 secured to the gripping member 68.

[0084] When the gripping member 68 is completely unscrewed from the reservoir 12, the user can move the application device 14 away from the reservoir 12. In doing so, the application element 76, loaded with cosmetic product contained in the second cavity 18, is removed from the second cavity 18 through the wiping ring 66. This limits or even avoids an excess of cosmetic product P on the application element 76. The application element 76 then passes through the conduit 62, until it is released from the reservoir 12 through the opening 20. The user can then apply the cosmetic product, for example to their eyelashes.

[0085] Following the application of the cosmetic product, the user can insert the application element 76 into the opening 20 of the reservoir 12 and bring the gripping member 68 closer to the reservoir 12. In doing so, the application element 76 passes at least partly through the conduit 62, approaching the second cavity 18.

[0086] The user then pivots the gripping member 68 relative to the reservoir 12, in the clockwise direction around the axis A. It then screws the application device 14 onto the reservoir 12.

[0087] The rotation of the gripping member 68 also causes the propellers 46, 48 in the reservoir 12 to pivot clockwise around the axis A. The rotation of the propellers 46, 48 is due to the complementarity of shapes between the ribs 64 of the shaft 56 and the grooves 74 of the rod 72, integral with the gripping member 68.

[0088] During the clockwise rotation of the propellers 46, 48, cosmetic product P is pushed towards the grid 40. Cosmetic product P is also sucked through the windows 54 between the propellers 46, 48. Cosmetic product P is found between the propellers 46, 48 and the grid 40. The rotation of the propellers 46, 48 pushes the cosmetic product P trapped between the propellers 46, 48 and the grid 40, towards the grid 40, then against the grid 40. Because the diameter D44 of the holes 44 of the grid 40 is smaller than the average diameter of the balls B, the balls are sheared between the grid 40 and the propellers 46, 48, in contact with the grid 40. The balls B are in particular sheared between the grid 40 and the flat portions 52 of the propellers 46, 48. 48. The cosmetic product that the balls B contain then mixes with the first phase L, passing through the grid 40, so as to form a more or less homogeneous mixture in the second cavity 18.In this second cavity 18, the application element 76 is then loaded with this more or less homogeneous mixture, with a view to a next application of cosmetic product.

[0089] The invention is not limited to the examples described above but is on the contrary susceptible of numerous variants accessible to those skilled in the art.

[0090] For example, the tank 12 may have any desired shape. The tank 12 may be in one or more pieces. The pieces may or may not be removable. The parts may be assembled by screwing, clipping, or any other means accessible to those skilled in the art.

[0091] The reservoir 12 may be cylindrical, but of different, non-circular section. The section may then be chosen according to the desired design. The section may in particular be square, hexagonal, oval or triangular. The cavities 16, 18 may also be cylindrical, but of non-circular section. The section defining the external shape of the reservoir 12 may be different from the section of the cavities 16, 18.

[0092] The grid 40 may have a shape other than the annular shape illustrated. The grid 40 may in particular have any shape making it possible to separate the first cavity 16 from the second cavity 18. For example, the grid 40 may have a square, hexagonal, oval, triangular or triangular shape. The grid 40 may in particular have a non-circular shape, complementary to the section of the first cavity 16 in which it is received. Such a shape thus makes it possible to limit, or even avoid, rotation of the grid 40 in the reservoir 12, without requiring the recesses 32 of the sleeve 36 and the projections 42 of the grid 40. The manufacture of the sleeve 36 and the grid 40 can be facilitated thereby.

[0093] The grid 40 can also take the form of a rasp, a succession of strips or any other form making it possible to shear the balls of the cosmetic product. By "rasper" is meant here a grid 40 having roughnesses in the vicinity of the holes 44, in particular on at least a portion of the edge of the holes 44, preferably on the entire edge of the holes 44. These roughnesses can make it possible to improve the shearing of the balls.

[0094] Furthermore, each helix 46, 48 may be regular, that is to say perfectly helical. In this case, the blade forming each helix is constituted by the helical portion 50. One end of the helix 46, 48 may then be in contact with the grid 40.

[0095] Alternatively, each helix 46, 48 may comprise a plurality of helical portions 50 extending one after the other. Each helical portion 50 may extend along a main helical extension line of different inclination. This improves the entrainment of the cosmetic product by the helices 46, 48.

[0096] A helix 46, 48 may also comprise a portion extending above another helix in the direction of the axis A of the reservoir 12. In other words, two helices may be partially superimposed in the direction of the axis A. A window 54 separating the two helices 46, 48 may then extend essentially in the axial and radial directions. In this case, the cosmetic product is guided between the two helices 46, 48.

[0097] The device 10 may also comprise a single propeller, or more than two propellers, preferably coaxial.

[0098] Furthermore, at least one helix may be provided in the second cavity 18, opposite the grid 40, preferably in contact with the grid 40. The grid 40 may thus be sandwiched between the helix(es) in the first cavity 16 and the helix(es) in the second cavity 18. Thus, it is possible to limit, or even prevent, clogging of the grid 40. Furthermore, the at least one helix provided in the second cavity 18 may improve the mixing of the two phases of the cosmetic product in the second cavity 18. The helix(es) in the second cavity 18 may be integral in rotation with the helix(es) in the first cavity 16. All the helixes, in the first or in the second cavity 16, 18, are for example integral with the same axis A.

[0099] Furthermore, the propeller(s) 46, 48 may not be integral with the shaft 56. The propellers 46, 48 may then be made of a material distinct from the material constituting the shaft 56. The material forming the propellers 46, 48 may in particular be more flexible or less flexible than the shaft 56. The propellers 46, 48 may, for example, be made of a thermoplastic polyurethane (TPU) or a thermoplastic elastomer (TPE). Thus, the material of the propellers 46, 48 may be chosen to improve the entrainment of the cosmetic product and / or the shearing of the beads.

[0100] In this case, the propeller(s) 46, 48 may be attached to the shaft 56. The propeller(s) may then be fixed to the shaft 56 by any means accessible to those skilled in the art. Alternatively, the propeller(s) 46, 48 may be overmolded onto the shaft 56.

[0101] In the example illustrated, the crown 58 at the end of the shaft 56 makes it possible to hold the shaft 56 in position in the first cavity 16. Alternatively, the end of the shaft 56 may have an extension extending in the direction of the axis A in the first portion 161 of the first cavity 16. In this case, the shaft 56 may be held in position in the first cavity 16 by complementary shape of the end of the shaft 56 with the first portion 161 of the first cavity 16. The volume of cosmetic product P received in the first cavity 16 is then improved while ensuring that the shaft 56 is held in position in the first cavity 16. To do this, it is possible in particular to envisage the extension of the shaft 56, received in the first portion 161 of the first cavity 16, cylindrical or annular, having a diameter substantially equal to the diameter D161 of the first portion 161 of the first cavity 16, cylindrical.

[0102] Furthermore, in the example illustrated, the cosmetic product balls are sheared between the helices 46, 48 and the grid 40 when the application device 14 is fixed to the reservoir 12. It is however possible to provide that the balls are sheared when the application device 14 is removed from the reservoir 12. To do this, in particular, it is possible to provide that the helices 46, 48 and the thread on the reservoir 12 allowing the screwing of the application device 14 are oriented in the same direction.

[0103] It is also possible to provide that the balls are sheared when the application device 14 is fixed and when it is removed from the reservoir 12. To do this, it is possible to provide helices 46, 48 oriented in two opposite directions. In other words, by traveling along the axis A of the reservoir 12 in one direction, the two helices 46, 48 rotate in opposite directions. Thus, one helix makes it possible to shear the balls B of the cosmetic product when the application device 14 is fixed on the reservoir 12, the other helix makes it possible to shear the balls B of the cosmetic product when the application device 14 is removed from the reservoir 12.

[0104] It is also possible to provide that the propellers 46, 48 are driven in rotation only when the application device 14 is fixed, in particular screwed onto the reservoir 12, or only when the application device 14 is removed, in particular unscrewed, from the reservoir 12. For this purpose, a mechanism may be provided distributed between the application device 14 and the shaft 56 allowing the application device 14 and the shaft 56 to be secured in a single direction of rotation of the application device 14 around the axis A of rotation of the propellers 46, 48. Thus, first reliefs on the rod 72 and second reliefs on the shaft 56 can form ratchets. In other words, the first reliefs on the rod 72 mesh in rotation with the second reliefs on the shaft 56, in a single direction of rotation of the rod 72. The rod 72 and the shaft 56 then cooperate in the manner of a ratchet wheel.

[0105] It is also possible for the propeller(s) to be driven in rotation relative to the grid 40, independently of the attachment of the application device 14 to the reservoir 12 or the removal of the application device 14 from the reservoir 12. A drive device, separate from the application device 14, may thus be provided, which makes it possible to rotate the propeller(s) 46, 48 without moving the application device 14. By rotation of the propeller(s) 46, 48 relative to the grid 40, it is meant that the propeller(s) and / or the grid 40 are rotated. Preferably, however, the propeller(s) 46, 48 are rotated, the grid 40 being held fixed in the reservoir 12.

[0106] A piston may also be provided in the first cavity 16, to push the cosmetic product towards the grid 40. The piston may have a cross-sectional shape complementary to the cross-section of the first cavity 16. The piston may be driven towards the bottom of the first cavity 16 when the application device 14 is screwed and / or is unscrewed from the reservoir 12. For example, the rotation of the shaft 56 may cause the piston to move towards the bottom of the first cavity 16. To do this, the piston may be screwed onto the shaft 56 and an anti-rotation device for the piston in the first cavity 16 causes it to move in the direction of the axis A, each time the shaft 56 is pivoted, in particular each time the application device 14 is screwed back onto the reservoir 12. Alternatively, the piston may be of non-circular cross-section.

[0107] A non-return system, well known to those skilled in the art, may be provided, which only allows the piston to move in one direction, pushing the cosmetic product towards the grid 40.

Claims

Claims

1. Device (10) for packaging and applying a cosmetic product (P) comprising an application device (14) with an application element (76) for applying the cosmetic product to keratin materials, and a reservoir (12), for receiving the cosmetic product, the reservoir (12) defining: - a first cavity (16), intended to receive a cosmetic product (P) comprising a first phase (L) in the form of a liquid or gel, and a second phase comprising beads (B) immiscible in the first phase (L), the first cavity (16) receiving at least one helix (46; 48), the helix (46; 48) comprising a blade of which at least one portion extends along a main line of helical extension, the helix (46; 48) being mounted to rotate freely around an axis of rotation (A), and a grid (40), substantially normal to the axis of rotation of the helix (46;48), with at least one hole (44), preferably a plurality of holes (44), a portion of the helix (46; 48) being, more preferably, in contact with the grid (40), the helix (46; 48) and the grid (40) being shaped to shear the balls (B) driven through the grid (40), by the rotation of the helix (46; 48); and - a second cavity (18) in fluid communication with the first cavity through the grid (40), the reservoir (12) and the application device (14) being shaped to allow the application element (76) to be loaded with cosmetic product coming from the second cavity (18).;

2. Device for packaging and applying a cosmetic product according to claim 1, in which the helix (46; 48) comprises a heliocoidal portion (50) extending over an angular sector, relative to the axis (A) of rotation of the helix (46; 48), of between 90° and 240°.

3. Device for packaging and applying a cosmetic product according to claim 1 or 2, in which the helix (46; 48) comprises a flat portion (52), normal to the axis (A) of rotation of the helix (46; 48), preferably extending over an angular sector, relative to the axis, of between 1° and 60°, the flat portion (52) preferably being in contact with the grid (40).

4. Device for packaging and applying a cosmetic product according to one of claims 1 to 3, comprising several coaxial propellers (46; 48), in particular two propellers (46; 48).

5. Device for packaging and applying a cosmetic product according to one of claims 1 to 4, in which the grid (40) is annular, with an axis equal to the axis (A) of rotation of the helix (46; 48), the external diameter (D40) of the grid (40) preferably being substantially equal to the external diameter (D46; D48) of the helix (46; 48).

6. Device for packaging and applying a cosmetic product according to any one of the preceding claims, in which the helix (46; 48) is in contact with a wall delimiting the first cavity (16), the first cavity (16) preferably being cylindrical, with a diameter (D162) substantially equal to the external diameter (D46; D48) of the helix (46, 48).

7. A cosmetic product packaging and application device according to any one of the preceding claims, wherein a hollow shaft (56) forms a conduit (62) connecting the second cavity (18) to an opening (20) of the reservoir (12), preferably through the first cavity (16).

8. A cosmetic product packaging and application device according to any one of the preceding claims, wherein the application device (14) further comprises a gripping member (68) and a rod (72) connecting the gripping member (68) to the application element (76).

9. Device for packaging and applying a cosmetic product according to claims 7 and 8, in which the gripping member (68) is capable of being fixed to the reservoir (12) to close the opening (20) of the reservoir (12), the rod (72) extending at least partly into the conduit (62) when the gripping member (68) is fixed to the reservoir (12).

10. Device for packaging and applying a cosmetic product according to claim 9, in which the gripping member (68) is capable of being screwed onto the reservoir (12), the reservoir (12) having a thread, the thread of the reservoir (12) preferably extending in a direction opposite to the helix (46; 48).

11. Device for packaging and applying a cosmetic product according to any one of the preceding claims, further comprising a drive device capable of driving the propeller (46; 48) in rotation relative to the grid (40), around the axis (A) of the reservoir (12).

12. A cosmetic product packaging and application device according to claims 10 and 11, wherein the drive device comprises the gripping member (68) and the rod (72) of the application device (14), the rod (72) comprising first reliefs (74) and a wall (56i) of the conduit (62) comprising second reliefs (64) shaped to be engaged in rotation by the first reliefs (74) in at least one direction of rotation of the rod (72) around the axis (A) of rotation of the propeller (46; 48), the rotation of the gripping member (68) around the axis (A) of the propeller (46; 48) in said at least one direction, causing the rotation of the propeller (46; 48), the first reliefs (74) preferably extending over only a portion of the rod (72) and / or the second reliefs (64) preferably extending over only a portion of the wall (56i) of the conduit (62) of the hollow shaft (56).

13. Device for packaging and applying a cosmetic product according to any one of the preceding claims, claim 8 applying, in which a bottom (35) of the first cavity (16) comprises a ring (28) allowing the passage of the rod (72).

14. A device for packaging and applying a cosmetic product according to claims 7 and 13, in which a wiping ring (66) is received in the ring (28) to form an extension of the conduit (62) opening into the second cavity (18).

15. A cosmetic product packaging and application device according to any one of claims 8 to 14, claim 9 applying, wherein the application element (76) projects from the conduit (62) into the second cavity (18), and from the wiping ring (66) where appropriate, when the gripping member (68) is fixed to the reservoir (12).

16. A cosmetic product packaging and application device according to any preceding claim, wherein the reservoir (12) comprises a sleeve (36) defining, at least in part, the first cavity (16), and a base (38) defining the second cavity (18), the base (38) being attached to the sleeve (36).

17. Device for packaging and applying a cosmetic product according to claim 16, in which the reservoir (12) further comprises a hoop (34), fixed on one end of the sleeve (36), opposite the base (38), the hoop (34) defining the opening (20) of the reservoir (12).

18. Device for packaging and applying a cosmetic product according to any one of the preceding claims, in which the reservoir (12), in particular the sleeve (36) and / or the base (38), where appropriate, is / are, at least in part, transparent or translucent, preferably made of glass or transparent plastic material.

19. Device for packaging and applying a cosmetic product according to any one of the preceding claims, in which the reservoir (12), in particular the first cavity (16) contains cosmetic product (P), the cosmetic product comprising at least two phases, a first phase (L) being in the form of a liquid or gel, and a second phase comprising beads (B) immiscible in the first phase (L), the at least one hole (44) of the grid (40) having a diameter (D40) less than the average diameter of the beads (B) of the second phase.

20. A method of applying a cosmetic product by means of the cosmetic product packaging and application device according to claim 19, comprising the steps of: i) shearing balls (B) contained in the first cavity (16) by rotating the propeller (46; 48); ii) loading the application element (76) of the application device (14) with cosmetic product taken from the second cavity (18); and iii) applying the cosmetic product taken in step ii) to keratin materials, by means of the application element (76) of the application device (14).

21. A method of applying a cosmetic product according to claim 20, claim 12 applying, wherein step i) consists of screwing the application device (14) onto the reservoir (12) or unscrewing the application device (14) from the reservoir (12).

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