ES2533126T3 - Device for confining a cosmetic product in a volume of keratin fibers, kit and associated procedure - Google Patents

Abstract

Confinement kit (10; 150; 190; 210) for a cosmetic product, comprising: - a device (14) for confining the cosmetic product in a volume of keratin fibers (11), of the type comprising two elements ( 28A, 28B) capable of moving relative to each other between an open position in which the volume of keratin fibers (11) and a closed position can be placed to confine the volume of keratin fibers (11) in an intermediate space ( 72) defined between the elements (28A, 28B), one of the mobile elements (28A, 28B) comprising a rigid part (30A, 30B) and a deformable part (32A, 32B) intended to be applied on the volume of keratin fibers (11) to coincide with the shape of the volume of keratin fibers (11), the device (14) being arranged so that when it is in the closed position, the intermediate space (72) is closed in a substantially hermetic manner when the Keratin fiber volume (1 1) is trapped between the two mobile elements (28A, 28B), and - a tensioning assembly (12) for the volume of keratin fibers (11), characterized in that - in the closed position, the tensioning assembly (12 ) partially closes the intermediate space (72), and - the tensioning assembly (12) comprises a tensioning part (16) comprising an external surface (21) on which it is intended to apply the keratin fibers, and - the fibers Keratin (11) are intended to be supported on the tension assembly (12), the tension assembly (12) being able to apply a shape to the volume of keratin fibers (11).

Description

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DESCRIPTION

Device for confining a cosmetic product in a volume of keratin fibers, kit and associated procedure

[0001] The present invention relates to a device according to the preamble of claim 1.

[0002] In particular, for the purpose of this invention, "cosmetic product" means a product as defined in Council Directive 93/35 EEC dated June 14, 1993.

[0003] The cosmetic product is advantageously a composition for permanent deformation of keratin fibers and, particularly, of the hair, such as a permanent hair reduction composition.

[0004] The most common technique for obtaining permanent hair deformation is the application of a composition containing an appropriate reducing agent and then, after rinsing the hair treated in this way, the application of an oxidizing composition to the hair previously tensioned, for example, using curlers, to finally give the required shape to the hair.

[0005] This technique can create wavy hair using a permanent hair waving procedure.

[0006] The new form imposed on the hair by a chemical treatment such as the one described above is durable and, in particular, resists the action of washing with water or shampoo, unlike simple classical techniques of temporary deformation, such as fixatives for The hair.

[0007] Once the curling iron has been put in place in the hair, the devices of the type mentioned above that are applied to the curling iron to cover the hair during application of the permanent product are known, for example, from document FR 1430896, US 2299367 and GB 743128.

[0008] Such devices are not entirely satisfactory. These devices have a wide opening towards the outside, in such a way that part of the cosmetic product can escape, thus reducing the effectiveness of the permanent procedure.

[0009] Therefore, a larger dose of the reducing composition should be applied to the hair to obtain the desired effect, which may be unpleasant for the wearer.

[0010] EP-A-1920674 discloses an application tool comprising two plates connected to each other.

[0011] US-A-2008/087293 discloses a hair treatment application system comprising the combination of at least one absorbent substrate having a specific average pore radius of about 300 micrometers to about 3,000 micrometers, and of one or more hair treatment compositions, each having a viscosity of about 3.00 cPs to about 150,000 cPs.

[0012] EP-A-1275320 discloses an applicator consisting of an instrument with two articulated arms.

[0013] Document DE-A-20016344 discloses a coating device for applying a liquid to the hair that is wound in a curling iron.

[0014] An object of the invention is to obtain a device for applying and extremely effectively confining a cosmetic product in a volume of keratin fibers, such as a lock of hair, in order to increase the effectiveness of cosmetic treatment resulting from product.

[0015] Another object of the invention is to obtain a device for carrying out a particularly effective cosmetic treatment using smaller amounts of product to reduce the cost of the treatment.

[0016] Another object of the invention is to obtain a confinement device manipulated very easily to simplify the use of cosmetic treatment.

[0017] Accordingly, the subject of the invention is a device according to claim 1.

[0018] The device according to the invention may comprise one or more of the characteristics of claims 2 to 10, considered in isolation or in any technically possible combination.

[0019] Another subject of the invention is a method according to claim 11.

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[0020] The treatment method according to the invention may comprise the features of claim 12.

[0021] The invention will be better understood after reading the following description provided by way of example only with reference to the accompanying drawings, in which: Figure 1 is a top view of a first treatment kit according to the invention, being the hair tensioning assembly arranged outside the confinement device; Figure 2 is a side view of the kit in Figure 1, the hair tensioning assembly being placed in the confinement device; - Figure 3 is a sectional view of the kit in Figure 2 along a middle transverse plane; FIG. 4 is a sectional view of a deformable part of the confinement device along a middle transverse plane; Figure 5 is a perspective view of the deformable part shown in Figure 4; Figure 6 is a three-quarter perspective front view of the kit in Figure 2; FIG. 7 is a side view of a second kit according to the invention; Figure 8 is a top view of the kit in Figure 7; Figure 9 is a schematic view of a detail of the fixing means of the confinement device in Figure 7; Figures 10 and 11 are variants of the joint for the confinement devices according to the invention; Figure 12 is a view similar to Figure 3 of a third kit according to the invention; FIG. 13 is a top view of a fourth kit according to the invention; Figure 14 is a side view of the confinement device shown in Figure 13; FIG. 15 is a sectional view along a middle transverse plane of the confinement device in FIG. 13; and Figure 16 is a three quarter perspective front view of a deformable part of the device in Figure 13.

[0022] Figures 1 to 6 show a first cosmetic treatment kit 10 according to the invention.

[0023] This first kit 10 is intended to be used to treat, in particular, a group of keratin fibers 11 of a user, visible in Figures 2 and 3, and in particular, a lock of hair.

[0024] The treatment is carried out by applying a cosmetic product on the strand of hair, and by confining the cosmetic product on the strand, possibly with heating, using kit 10 according to the invention.

[0025] Hair treatment includes care or conditioning of hair, maintenance or permanent fixation or permanent hair, temporary, semi-permanent or permanent hair coloring, straightening or softening.

[0026] According to a particular example, the product is a permanent hair deformation composition.

[0027] For example, the cosmetic product may be a cosmetic reducing composition that is intended to reduce the disulfide bonds of keratin.

[0028] As shown in Figure 1, kit 10 comprises a tension assembly of keratin fibers 12 and a confinement device 14 according to the invention.

[0029] The tensioning assembly 12 comprises a tensioning part 16 and advantageously heating means 18 and a part 20 for the electrical connection of the heating means 18.

[0030] Tensioning part 16 is generally elongated along a longitudinal axis A-A '.

[0031] This part 16 can be, for example, cylindrical and forms a roller or a rod that forms a curling iron.

[0032] In this example, the heating means 18 are fixed to the tensioning part 16. They are advantageously arranged in a cavity formed in this part.

[0033] In a variant (not shown), the heating means are included in the confinement device.

14.

[0034] In the example shown in Figures 1 and 6, the connection part 20 comprises an electrical cable 22 that is intended to be connected to an electric current source, and a connection head 24 that is intended to be connected to the heating means 18 and that can be removed.

[0035] In this example, the head 24 can be removed from the heating means 18 and the tensioning part 16.

[0036] As a variant, the electric cable 22 is permanently connected to the heating means 18.

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[0037] For example, the electrical connection head 24 is connected at a longitudinal end of the tensioning part 16.

[0038] The tensioning part 16 comprises an outer surface 21 that shapes the keratin fibers on which the keratin fibers 11 are to be applied. When the keratin fibers 11 are wound on the tensioning part, part 16 defines a volume of fibers 11.

[0039] As shown in Figure 5, the confinement device 14 comprises two elements 28A, 28B free to move relative to each other to form a clamp, the two elements 28A, 28B being manipulable between an open position in which Keratin fibers can be put in place and a closed position in which the volume of keratin fibers can be confined.

[0040] Each mobile element 28A, 28B comprises a rigid part 30A, 30B that forms a support and a deformable part 32A, 32B formed by a flexible half-shell to contain and confine the volume of keratin fibers.

[0041] In the example shown in Figures 1 to 6, the device 14 also comprises means 36 for articulating the movable elements 28A, 28B with each other.

[0042] Each rigid part 30A, 30B comprises a maneuverable region 38 and a support region 40, the maneuverable region 38 and the support region 40 being located on each side of the articulation means 36.

[0043] The support regions 40 of the respective rigid parts 30A, 30B are located opposite each other and at a distance from each other.

[0044] Each maneuverable region 38, in this example, comprises a lug 42 projecting outwardly transversely from the support region 40.

[0045] In this example, the support region 40 and the maneuverable region 38 are made of a single piece of the same material.

[0046] The support region 40 comprises an open frame 44 that delimits a central opening 46. As shown in Figure 1, the frame 44 is substantially elongated along an axis B-B '.

[0047] The contour of the central opening 46 is designed to contain the tensioning part 16 and surround it around its periphery.

[0048] In the example shown in Figure 1, the frame 44 extends substantially in one plane. Advantageously it has a substantially rectangular shape. It comprises two longitudinal uprights 48A, 48B substantially parallel to the axis B-B 'connected to each other at their ends through cross braces 50A, 50B.

[0049] The maneuverable region 38 projects from an upright 48B in the support region 40. In the example shown in Figure 1, the length of the braces 50A, 50B perpendicular to the line BB 'is less than the length of the uprights 48A, 48B parallel to the axis B-B '.

[0050] A first brace 50A extends substantially in the plane of the frame 44. A second brace 50B also comprises a convex central region 52 that delimits a notch 54 that opens in front of the opposite rigid part 30A, 30B.

[0051] The articulation means 36 comprise articulation tabs 60A, 60B fixed to the first rigid part 30A and the second rigid part 30B, respectively, an articulation shaft 62 connecting the tongues 60 to each other, and an elastic actuating part 64 placing elements 28A, 28B in the closed position.

[0052] The tabs 60A, 60B project each other from each region 38 that maneuvers a rigid part 30A, 30B. They are advantageously made of the same material as the maneuverable regions 38.

[0053] The articulation shaft crosses the tabs 60A, 60B and connects them together. It extends substantially parallel to the axis B-B 'which extends from the support region 40.

[0054] Therefore, the rigid parts 30A, 30B can be moved relative to each other to move the confinement device 14 from the open position in which the support regions 40 are at a distance from each other and the maneuverable regions 38 are close to each other, and the closed position in which the support regions 40 are close to each other and the maneuverable regions 38 are at a distance from each other.

[0055] The elastic drive part 64 may be formed, for example, by a spring capable of operating the rigid parts 30A, 30B to place them in the closed position of the device 14.

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[0056] In this example, the drive part 64 is formed by an additional spring between the maneuverable regions 38.

[0057] As a variant (not shown), the drive part 64 is formed by elastic strips made of the same material as at least one of the maneuverable regions 38.

[0058] The deformable parts 32A, 32B in this example are formed by flexible half shells 70A, 70B that delimit an intermediate confinement space 72 of the volume of keratin fibers 11, when the device 14 is in the closed position.

[0059] In the example shown in Figures 4 and 5, each half-shell 70A, 70B comprises a peripheral joint 74 and a central wall 76 that will be applied to the volume of keratin fibers 11 to match its shape.

[0060] The peripheral joint 74 has a shape complementary to the frame 44 on which it is fixed. It comprises a solid bed 78 defining a fixing surface 80 in the frame 44 and an opposite surface 82 applied on the joint 74 of the opposite half-shell 70B, 70A. The peripheral joint 74 also advantageously comprises a rib 83 that projects upwardly from the surface 80 to be inserted into a corresponding slot (not shown) formed in the frame 44.

[0061] The application surface 82 is substantially flat so that a gasket will be formed when applied to the application surface 82 of the opposite half shell 70B, 70A.

[0062] The peripheral joint 74 comprises two longitudinal regions 84A, 84B applied to the uprights 48A, 48B of the frame 44 and two transverse regions 86A, 86B applied on the corresponding braces 50A, 50B.

[0063] In the closed position, a first transverse region 86A of a sheath half 70A, 70B extends substantially in a plane, so that it can be applied over its entire length in the corresponding region 86A of the half-shell 70A, 70B. A second transverse region 86B comprises a convex central part that fits in the notch 54 defining a recess 90 in which the electrical connection head 24 of the tension assembly 12 will be adjusted in a complementary manner.

[0064] The peripheral joint 74 delimits a central opening 92 that is completely closed by the deformable wall

76

[0065] The deformable wall 76 is formed of a thin extensible film. "Tensile film" means a film that can be elastically and reversibly deformed to increase its total surface, for example by reducing its thickness.

[0066] The film that forms the wall 76 is thinner than the bed 78 that forms the joint 74 and is advantageously half its thickness.

[0067] The film is made of a material that can stretch elastically and reversibly, without any significant plastic deformation.

[0068] Thus, the surface area of the wall 76 can be increased by at least 10%, for example between 10% and 100% without any significant plastic deformation, to match the shape of the volume of the Keratin fibers 11 arranged in the intermediate space 72.

[0069] The extensible wall film 76 is advantageously made of a deformable polymer, such as silicone

or an elastomer of the natural rubber type, an EPDM (ethylene propylene diene copolymer), an NBR (butadiene and acrylonitrile copolymer) or a thermoplastic, in particular a thermoplastic elastomer, such as TPU, SEBS, SBS or a flexible thermoplastic, such like EVA.

[0070] In the example shown in Figure 5, the wall 76 is made of the same material as the peripheral joint 74. The wall 76 extends the joint 74 in the opening 92.

[0071] As shown in Figure 4, when the peripheral wall 76 is in the rest position and when no external tension is applied thereto, it comprises a central region 100 in the form of a cylindrical dome with the longitudinal axis BB 'and advantageously two side channels 102 to facilitate deformation of the central region 100.

[0072] The central region 100 projects outwardly from the opening 92 delimited by the peripheral joint 74. It is convex towards the outside.

[0073] The gutters 102 extend on each side of the central part 100. They are convex inwards, opposite to the convexity of the central part 100.

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[0074] Thus, when at rest, the wall 76 has a substantially omega shaped contour section in a transverse plane with respect to the B-B 'axis.

[0075] When the confinement device 14 moves from its open position to its closed position, the half shells 70A, 70B can move towards each other between a configuration in which they are at a distance from each other and a configuration in the that one applies to the other.

[0076] Thus, in the open position of the device, the application surfaces 82 of the peripheral joints 74

10 are separated, at least partially, from each other, particularly along the two longitudinal regions 84B furthest from the axis of articulation 62.

[0077] The intermediate space 72 is then opened to allow the insertion of the volume of the keratin fibers 11 between the mobile elements 28A, 28B.

[0078] In the closed position of the device 14, the application surfaces 82 of the peripheral joints 74 are applied to each other substantially around their entire perimeter, except in the recess 90, advantageously at more than 75% of their perimeter measured around of the entire periphery of the joints 74.

[0079] In this example, the joints 74 delimit a passage 104 formed by the opposite recesses 92 through which the electrical connection part 20 is inserted, in a manner complementary to the shape of the external section of the head 24 of this part 20.

[0080] Thus, in the closed position, the half shells 70 are placed in a shape to define a substantially sealed intermediate space 25 when the volume of the keratin fibers 11 is in this space.

[0081] For the purposes of this invention, "substantially sealed" means that this space is closed between the half-shells 70A, 70B, either entirely by the opposite joints 74, or partially by the opposite joints 74 and partially by the assembly of tension 20 placed in the corresponding manner in the insertion passage 104

30 defined between the joints 74 in the complementary part.

[0082] "Closed" means that the space that may be present locally between the opposite joints 74 or between a joint 74 and the tensioning assembly 20 is less than 2% and advantageously less than 1% of the thickness of the joint 74.

[0083] It should be noted that the keratin fibers 11 are partially secured between the joints 74 around part of the periphery of the joints 74.

[0084] In this example, the joints 74, in particular, close the intermediate space 72 when applied to each other along the longitudinal regions 84A, 84B of the joints 74 and in at least one transverse region 86A perpendicular to the line BB '.

[0085] In a variant (not shown), the joints 74 are applied to each other around the entire periphery of the intermediate space 72. In this case, they do not define an opening 104 larger than its interstitium.

[0086] In the closed position, the joint is compressed at least 1% of its height in relation to its height in the open position and advantageously not more than 75% of its height in relation to its height in the open position .

[0087] In the closed position, the wall 76 is deformable by an outward movement of the gutters 102, and then by the reversible elastic extension of the wall 76 to increase its surface area, depending on the volume defined by the group of keratin fibers 11 supported on tension assembly 20, or by the

50 group of keratin fibers alone in the absence of tension assembly 20.

[0088] Next, the operation of the first kit 10 according to the invention for the treatment of a group of keratin fibers 11 will be described.

[0089] Initially, the confinement device 14 and tension assembly 12 are supplied separately. The confinement device 14 is in its closed position in which the drive part 64 keeps the deformable half shells 70A, 70B applied to each other with their peripheral joints 74 in contact.

[0090] The group of keratin fibers 11 to be treated is selected and then wrapped around the part of

Tensioning 16. A cosmetic product, advantageously a composition for permanent hair waving as described above, is then applied to keratin fibers 11, for example by spraying or by using an applicator.

[0091] The electrical connection part 20 is then connected to the heating means 18 of the tensioning part 16.

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[0092] The operator then holds the maneuverable regions 38 of the confinement device between his fingers

14. These maneuverable regions 38 are carried towards each other against the resistance of the elastic drive part 64, to pivot the rigid parts 30A, 30B around the axis 62 at a distance from each other.

[0093] The displacement of the rigid parts 30A, 30B causes the combined displacement of the flexible half shells 70A, 70B to move them away from each other and moves the confinement device 14 in its open position in which it is placed in its place the volume of keratin fibers 11.

[0094] The device 14 is then moved towards the tensioning part 16 to insert the part 16 and the keratin fibers 11 in the intermediate space between the half shells 70A, 70B.

[0095] The operator then presses the tensioning part 16 against the extensible wall 76 of the half-shell 70B by insertion through the central opening 46 of the frame 44.

[0096] If desired, the operator places the electrical connection part 20 in a recess 90.

[0097] Next, the operator releases the maneuverable regions 38. Under the effect of the drive part 64, the maneuverable regions 38 pivot with each other and the support regions 40 move towards each other to allow the application of the joint peripheral 74 of a half-shell 70A over the peripheral joint 74 of the opposite half-shell 70B.

[0098] During this displacement, keratin fibers 11 are trapped between opposite joints 74 along longitudinal region 84B. In the same way, the electrical connection part 20 is fixed in a complementary manner in the passage 104 defined by the recesses 90.

[0099] Since the extensible wall 76 is deformable, it is firmly applied to the volume of the keratin fibers 11 defined by the fibers 11 wound on the tensioning part 16, causing the outward deployment of the central region 100 and, possibly, its extension, and outward deployment of the gutters 102.

[0100] Since the peripheral joints 74 are applied to each other around substantially all of their periphery, they hold together the connection head 24 of the electrical connection part 20 and the keratin fibers 11 passing through the joints 74. The intermediate space 72 defined between the half-shells 70A, 70B in the closed position is then closed in a substantially sealed manner around the entire periphery of this space 72.

[0101] The shape of this interior space 72 is therefore substantially complementary to the shape of the volume of keratin fibers 11 and the tensioning part 16, when there is one. This minimizes the volume of gas present around the keratin fibers 11 in space 72 and therefore increases the effectiveness of the treatment.

[0102] The heating means 18 are then connected to increase the temperature of the keratin fibers 11 to between 50 ° C and 250 ° C, and advantageously between 55 ° C and 150 ° C and more particularly between 60 ° C and 90 ° C.

[0103] The duration of this heating is then between one minute and two hours, preferably between one minute and 30 minutes, and even better between 5 minutes and 20 minutes and ideally between 10 minutes and 15 minutes.

[0104] Once the treatment is finished, the operator brings the maneuvering regions 38 towards each other again opposing the resistance of the drive part 64 to open the confinement device 14 and extract the volume of the keratin fibers 11 of space 72.

[0105] Next, an oxidizing composition containing at least one oxidizing agent is applied to fix conformation of the keratin fibers by oxidation, reforming the disulfide bonds.

[0106] Therefore, the confinement device 14 safely and simply delimits a sealed space 72 for the cosmetic product, even when the electrical connection part 20 passes through the device 14.

[0107] Due to the presence of deformable half-shells 70A, 70B particularly comprising an extensible wall 76, the confinement device 14 is capable of adapting to varying volumes of keratin fibers 11 that may result from the amount of selected fibers 11 or of the winding characteristics of these fibers 11 in a tensioning part 16, if any, or the shape of the tensioning part 16.

[0108] This result is obtained through a very simple, fast and reliable manipulation, using the device 14 that can be easily cleaned between two uses.

[0109] In particular, this reduces the cost of cosmetic treatment by reducing the time required for the preparation of this treatment.

[0110] The confinement device 14 of a second kit 150 according to the present invention is shown in Figures 7 to 9.

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[0111] Unlike the device 14 in the first kit of 10, the rigid parts 30 are articulated with each other by means of articulation 36 formed by a film joint 152. Advantageously, the confinement device 14 does not have a maneuverable region 38.

[0112] In addition, the articulation means 36 do not have a device for actuating the confinement part 14 towards its closed position.

[0113] Unlike the first kit 10, the confinement device 14 of the second kit 150 comprises retention means 154 of the device 14 in its closed position.

[0114] In the example shown in FIGS. 7 and 8, the retaining means 154 comprise at least one movable tab 156 comprising an end 158 fixed on a first rigid part 30A and a free end 160 intended to join on a surface opposite of a second rigid part 30B opposite.

[0115] The tongue 160 can pivot around its fixed end 158 in relation to the first rigid part 30A between a configuration in which the second rigid part 30B is released, in which the free end 160 is maintained at a distance of the second rigid part 30B and a configuration that maintains the second rigid part 30B in which the rigid parts 30A, 30B and the half shells 70A, 70B remain inserted between the free end 160 and the end

20 related 158 of the tongue 160 in its closed position.

[0116] In a variant shown in Figure 9, the retention means 154 comprise a click-fit tab 166 fixed to a first rigid part 30A. The opposite rigid part 30B comprises a through hole 168 through which the tongue 166 is inserted and held.

[0117] In a variant shown in Figure 10, the peripheral joint 74 of each half-shell 70A, 70B comprises two parallel edges 180 that delimit a peripheral groove 182 between them. When in the closed position, the edges 180 of each joint 74 are pressed in contact with the edges 180 of the opposite joint 74.

[0118] In the variant shown in Figure 11, each joint 74 comprises a support edge 184 projecting beyond the frame 44. In the closed position, the support frame 184 of the joint 74 of each half-housing 70A is applied on the corresponding support edge 184 of the joint 74 of the opposite half-shell 70B.

[0119] A third kit 190 according to the invention is shown in Figure 12. Unlike the first kit 10, the second kit 190 35 comprises a retention means 154 that holds the device 14 in its closed position. The retaining means 154 comprises a clamping lever 192 installed to move freely between the maneuverable regions 38.

[0120] The user can move lever 192 to separate regions 38 and keep them separate.

[0121] Accordingly, the lever 192 is articulated in a region 38 by means of which a first rigid part 30A is manipulated, opposite to the half shells 70A with respect to the axis of articulation 62.

[0122] The lever 192 comprises a holding region 194 and a driving head 196 projecting from the holding region 194 in a groove 198 formed in the maneuverable region 38 of the second rigid part 30B.

[0123] The clamping part 194 slides on an inclined surface 200 of the maneuverable region 38 of the second rigid part 30B opposite the first rigid part 30A.

[0124] After placing the device 14 in its closed position, the user drives the drive part 196 50 to move the lever 192 towards the articulation axis 62.

[0125] During this displacement, the clamping part 194 slides on the inclined surface 200 to move the maneuverable region 38 of the first rigid part 30A away from the maneuverable region 38 of the second rigid part 30B. This causes the corresponding compression of the joints 74 opposite to the half shells 70A, 70B supported by the

55 support regions 40.

[0126] A fourth kit 210 according to the invention is shown in Figures 13 to 16.

[0127] Unlike the confinement device 14 in the first kit 10, each half-shell 70A, 70B comprises a hollow body 212 formed by a liner. The hollow body 212 defines a deformable peripheral joint 74 and a deformable wall 76 that will be pressed in contact with the volume of the keratin fibers.

[0128] The hollow body 212 has a substantially C-shaped cross section. Thus, it comprises a substantially flat outer separation wall 214 fixed to the support region 40, a peripheral separation wall 65 215 and an internal separation wall concave 216 delimiting the extensible wall 76 and the joint 74.

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[0129] The lining 212 is advantageously made by extrusion of the separation walls 214, 216 and the longitudinal portions of the peripheral separation wall 215 through a matrix of constant section, followed by the closing of the axial ends of the wall peripheral 216 to form a compressible inner volume 220.

[0130] The internal separation wall 216 has a concave central region that forms the deformable wall 76 and a substantially flat peripheral region that forms the joint 74.

[0131] The internal separation wall 216 is kept at a distance from the external separation wall 214 to allow deformation of the joint 74 and the deformable wall 76 towards the external separation wall 214 which will coincide 10 with the shape of the volume of Keratin fibers 11, particularly when it is supported by tensioning part 16.

[0132] As shown in Figure 16, each half-shell 70A, 70B thus forms a hollow region with the B-B 'axis substantially in the form of a half cylinder. In the example shown in Figure 16, the hollow region is opened in a recess 92 at an axial end, to allow insertion of the tensioning part 16 for the keratin fibers 11.

[0133] The fourth kit 210 operates in a manner similar to the first kit 10.

[0134] Thus, once the group of keratin fibers 11 has been formed and, possibly, they have been placed around the tensioning part 14, the maneuverable regions 38 move towards each other to separate the 20 hollow bodies 212 and opening the device 14. The volume of the keratin fibers 11 is then inserted between the hollow bodies 212 and the confinement device 14 has changed to its closed position.

[0135] During this displacement, the internal separation wall 216 is deformed towards the internal separation part 214 to match the volume defined by the keratin fibers 11 and to accommodate them.

[0136] The joint 74 of each hollow body 212 remains applied on the opposite joint 74 of the opposite hollow body 212 to delimit a substantially sealed intermediate space 72 between them, possibly closed in the axial direction by the electrical connection part 20.

[0137] The hollow body 212 is fixed on the support region 40, for example, by gluing or adjusting with hot or cold force, or by insert molding.

[0138] The maneuverable regions 38 and the support regions 40 are advantageously formed in one piece, for example by injection.

35 [0139] The terms "one", "two", etc. they must be understood in the sense of "at least one", "at least two", etc., unless otherwise indicated.

Claims (11)

1. Confinement kit (10; 150; 190; 210) for a cosmetic product, comprising: - a device (14) for confining the cosmetic product in a volume of keratin fibers (11), of the 5 type comprising two elements (28A, 28B) capable of moving relative to each other between an open position in which the volume of keratin fibers (11) and a closed position can be placed to confine the volume of keratin fibers ( 11) in an intermediate space (72) defined between the elements (28A, 28B), one of the mobile elements (28A, 28B) comprising a rigid part (30A, 30B) and a deformable part (32A, 32B) intended to be applied on the volume of keratin fibers (11) to match the shape of the 10 volume of keratin fibers (11), the device (14) being arranged so that when it is in the closed position, the intermediate space (72) is closed in a substantially hermetic manner when the volume of the keratin fibers (11) is trapped between the two mobile elements (28A, 28B), and a tension assembly (12) for the volume of the fibers of keratin (11), 15 characterized in that - in the closed position, the tensioning assembly (12) partially closes the intermediate space (72), and - the tensioning assembly (12) comprises a tensioning part (16) comprising an external surface (21) on which it is intended to apply the keratin fibers, and -the keratin fibers (11) are intended to be supported on the tensioning assembly (12), the tensioning assembly (12) being able to apply a shape to the volume of keratin fibers (11). 2. Confinement kit (10; 150; 190; 210) according to claim 1, characterized in that the tensioning assembly (12) comprises means (18) for modifying the temperature of keratin fibers (11) located in the space intermediate (72). 25 3. Confinement kit (10; 150; 190; 210), according to any of the preceding claims, characterized in that the intermediate space (72) extends longitudinally to the lake of an elongation axis (B-B '), the elements mobiles (28A, 28B) closing transversely and sealing at least one axial end of the intermediate space (72) in its closed position. 30

Four.

Confinement kit (10; 150; 190; 210), according to any of the preceding claims, characterized in that in the closed position, the intermediate space (72) is closed over its entire periphery by the two elements (28A, 28B).

5.

Confinement kit (10; 150; 190; 210), according to any of the preceding claims, characterized in that

Each mobile element (28A, 28B) comprises a peripheral joint (74) that at least partially delimits the intermediate space (72), the peripheral joints (74) of the mobile elements (28A, 28B) being applied together in the closed position . 6. Confinement kit (10; 150; 190; 210) according to claim 5, characterized in that each peripheral joint (74) 40 of a mobile element (28A, 28B) delimits an application surface (82) on the peripheral joint (74) opposite the other element (28A, 28B), the application surface (82) being substantially flat. 7. Confinement kit (10; 150; 190; 210), according to any of the preceding claims, characterized in that the deformable part (32A, 32B) comprises the peripheral joint (74) and a deformable central wall (76) intended for 45 be applied to the volume of keratin fibers (11), the peripheral joint (74) and the central wall (76) being advantageously manufactured in one piece. 8. Confinement kit (10; 190; 210), according to any of the preceding claims, characterized in that each mobile element (28A, 28B) comprises a rigid part (30A, 30B) and a deformable part (32A, 32B) intended for 50 be applied on the volume of keratin fibers (11) to match the shape of the volume of keratin fibers (11), each rigid part (30A, 30B) delimiting a support region (40) for the deformable part (32A , 32B) and a maneuverable region (38) that a user can hold to move the moving elements from their closed position to their open position, the device (14) advantageously forming a clamp. A confinement kit (10; 150; 190; 210), according to any of the preceding claims, characterized in that the deformable part (30A, 30B) comprises an elastically extensible film, advantageously capable of reversibly increasing its area in the minus 10%. 10. Confinement kit (210) according to any of the preceding claims, characterized in that the deformable part 60 (30A, 30B) comprises a hollow body (212) that delimits a compressible inner volume (220). 11. Procedure for the cosmetic treatment of a volume of keratin fibers (11) of the type comprising the following steps: - supply of a confinement kit (10; 150; 190; 210), according to any of claims 1-10 ; 65 - insertion of the volume of keratin fibers (11) between the two mobile elements (28A, 28B) in their open position; 10 -movement of the two mobile elements (28A, 28B) from their open position to their closed position to define a substantially sealed intermediate space (72). 12. Method according to claim 11, characterized in that during the movement from the open position to the closed position, the deformable part (30A, 30B) is applied on the volume of keratin fibers (11) deforming to match the shape of the Keratin fiber volume (11). eleven