Patent Publication Number: US-9415903-B2

Title: Product dispensing head for a container and associated dispensing device

Description:
CROSS REFERENCE TO RELATED APPLICATIONS 
     This application is a National Phase filing under 35 U.S.C. §371 of PCT/EP2012/065811 filed on Aug. 13, 2012; and this application claims priority to Application No. 1157348 filed in France on Aug. 16, 2011; and this application claims the benefit of U.S. Provisional Application No. 61/554,092 filed on Nov. 1, 2011; the entire contents of all are hereby incorporated by reference. 
    
    
     This invention relates to a product dispensing head for a container including:
         an application wall having a central axis, in which the application wall defines at least one product dispensing orifice, off-centered with respect to the central axis,   a removable cap, mobile with respect to the application wall between a position for closing each dispensing orifice and a product dispensing position, the removable cap comprising a bearing element on the application wall, suitable for exerting a pressure on the application wall at a distance from the dispensing orifice when the cap occupies its closing position, in which the dispensing orifice remains clear when the bearing element is applied on the application wall.       

     This dispensing head is intended to be mounted on a container containing a cosmetic product, for storage, then for dispensing and applying the cosmetic product on a keratin surface of a user, such as the skin or the hair. 
     In particular for the meaning of this invention, “cosmetic product”, means a product as defined in Directive 93/35/EEC of Jun. 14, 1993, or in Regulation No. 1223/2009 of the European Parliament and the Council dated Nov. 30, 2009. 
     This cosmetic product is in particular a liquid, gel, creamy or pasty product, such as a product for care, maintenance or coloring of the skin or hair, or a body hygiene product, such as, in particular, a deodorant. 
     To store cosmetic products capable of being poured, it is known to use a tube-shaped container equipped at its end with a product dispensing head. 
     The head has at least one product-dispensing orifice that opens onto an application surface. 
     To extract the product from the container, pressure is exerted on the product so as to push the product out of the container through the dispensing orifice. The product is then collected before being applied on the keratin surface. 
     When the dispensing device is not used, the application surface is generally capped with a closing cap, so as to prevent the product from flowing out of the tube during storage. The cap also prevents degradation or contamination of the product. 
     The cap includes, for example, a peripheral skirt applied around the application surface so as to close the container. 
     To improve the seal of the device, it is known to use caps equipped with an interior skirt applied directly on the application surface around the dispensing orifice. 
     FR 2 534 885 describes an application head of the type mentioned above. The interior skirt of the rigid cap is applied on the rigid application surface defining the dispensing orifice. 
     To ensure a good seal, it is therefore necessary to provide very precise production clearances so as to prevent the product from leaking after the cap has been screwed onto the application head. 
     To overcome this problem, FR 2 736 623 describes a solution in which a deformable membrane covers, at rest, the dispensing orifices. The membrane is deformed by the pressure of the product when it is extracted from the tube. This deformation frees the product dispensing orifices. A closing cap having a central projection is applied on the membrane, without exerting pressure on it. 
     FR 2 779 416, EP 0 096 102, and U.S. Pat. No. 5,678,731 describe other product dispensing heads. FR 2 919 176 describes a product application device including curved application fingers. 
     In all of these documents, the seal of the container when it is not used, in particular when the device is stored upside down, may still be improved. 
     An objective of the invention is therefore to obtain a product application head comprising an application wall and a cap capping the application wall, in which the seal is improved for storage, in particular for upside-down storage. 
     To this end, the invention relates to a dispensing head of the type mentioned above, characterized in that, when the cap occupies its closing position, each dispensing orifice is placed facing an intermediate closed region of a bearing element, located between a first exterior contact region of the bearing element with the application wall and a second interior contact region of the bearing element with the application wall. 
     The dispensing head according to the invention may include one or more of the following features, considered alone or in any combination that is technically possible:
         at least one of the first region and the second region revolves about the central axis;   the first region and the second region are connected to one another by intermediate contact regions of a bearing element on the application wall, in which the first region, each intermediate contact region and the second region define a closed contact line surrounding a dispensing orifice;   the first region and the second region are formed by contact lines, with the radial span of each region being less than 4 mm, advantageously being comprised between 0.2 mm and 2 mm;   the dispensing orifice is formed by an slot, with a maximum radial span less than its length;   the maximum radial distance radially separating the dispensing orifice from the first region and the second region is less or equal to 5 mm, and is advantageously comprised between 0.25 mm and 5 mm;   the maximum radial distance separating the first region from the second region is greater than 0.5 mm, and is advantageously less than 10 mm, and is in particular comprised between 0.5 mm and 10 mm, advantageously between 2 mm and 5 mm;   the application wall has a central area without an orifice delimited externally by the second region and through which the central axis passes;   the application wall has a downstream surface without roughnesses or macroscopic projections;   each bearing element is more rigid than the application wall, with the application wall being locally deformable in the vicinity of the dispensing orifice, one each side of the dispensing orifice;   the application wall is more rigid than the bearing element, with each bearing element being locally deformable in the vicinity of the dispensing orifice on each side of the dispensing orifice;   the application wall is formed by a thermoplastic elastomer, such as an ethylene and α-olefin copolymer;   it comprises a support holding or defining the application wall, in which the cap being capable of being screwed or snapped onto the support;   the application wall defines a plurality of separate dispensing orifices, in which each dispensing orifice is located between a first exterior contact region of a bearing element and a second interior contact region of a bearing element.   the intermediate region, the first exterior contact region and the second interior contact region mutually define a product confinement area into which the dispensing orifice opens.   the first contact region and the second contact region are formed by contact lines, with the radial span of each region being less than 5 times the radial span of the dispensing orifice, said transversal span being non zero.   the maximum radial distance radially separating the dispensing orifice from the first region and the second region is less than 5 times the maximum radial span of the dispensing orifice,   the maximum radial distance separating the first region from the second region is greater than three times the maximum radial span of the dispensing orifice located between the first region and the second region, and is advantageously less than 10 times the maximum radial span of the dispensing orifice.   the application wall defines a contact protrusion around at least a dispensing orifice, the contact protrusion contacting the bearing element when the cap is in its closing position.       

     The invention also relates to a product dispensing head for a container including:
         an application wall having a product-dispensing orifice,   a removable cap comprising an bearing element on the application wall, which bearing element is suitable for exerting a pressure on the application wall at a distance from the dispensing orifice,       

     characterized in that at least one element among the application wall and the bearing element is deformable, or has a hardness lower than the hardness of the other element, so as to close the dispensing orifice during contact of the bearing element on the application wall. 
     The dispensing head according to the invention may include one or more of the following features, considered alone or in any combination that is technically possible:
         the dispensing orifice is formed by a slot passing through the application wall,   the dispensing orifice has a curved shape, in particular in the form of an arc of circle,   the dispensing orifice extends through the application wall according to a general axis inclined with respect to a normal to the application wall, considered at the level of the outlet of the dispensing orifice,   it comprises a projection for activating the deformation, projecting with respect to either the application wall or the bearing wall so as to be inserted between the bearing element and the application wall at a distance from the dispensing orifice,   the application wall is convex or concave,   the application wall has a span greater than 1 cm 2 ,   the application wall is smooth or textured, with the head advantageously comprising a plurality of elements for contact with the keratin surface projecting with respect to a downstream surface of the application wall,   it comprises a perforated reinforcement, in particular resiliently deformable, applied under the application wall,   it comprises a support holding or defining the application wall, with the cap being mobile with respect to the support between a closing position mounted on the support, in which the bearing element exerts a pressure on the application wall so as to close the dispensing orifice, and a product dispensing position, in which the cap is advantageously capable of being screwed or snapped onto the support,   in the closing position, the bearing element exerts a pressure on the application wall at a distance from the dispensing orifice,   in the closing position, the bearing surface exerts a pressure on each side of the dispensing orifice,   the application wall defines a downstream surface, and an exterior peripheral surface, with the bearing element applying a pressure on the downstream surface and/or on the exterior peripheral surface.       

     The invention also relates to a product-dispensing device characterized in that it comprises:
         a container,   a dispensing head as described above, closing the container.       

     The device according to the invention can include one or more of the following features, considered alone or in any combination that is technically possible:
         the container is formed by a flexible tube,   the container contains a dispensing mechanism that advantageously includes a piston.       

    
    
     
       The invention will be easier to understand in view of the following description, provided solely as an example, and with reference to the appended drawings, in which: 
         FIG. 1  is a side view of a first dispensing device equipped with a dispensing head according to the invention, 
         FIG. 2  is a cross-section view according to a vertical mid-plane, of the dispensing head of  FIG. 1 , with the cap having been removed; 
         FIG. 3  is a view equivalent to that of  FIG. 2 , with the cap occupying a closing position; 
         FIG. 4  is a bottom view of the head; 
         FIG. 5  is a top view of the head, with the cap having been removed; 
         FIG. 6  is a cross-section view according to a mid-plane of the cap of the dispensing head; 
         FIG. 7  is a side view of the dispensing head of a second device according to the invention; 
         FIG. 8  is a view equivalent to that of  FIG. 7 , for a third device according to the invention; 
         FIG. 9  is a view equivalent to that of  FIG. 7 , for a third device according to the invention; 
         FIG. 10  is a view of a detail of an alternative of the dispensing head according to the invention; 
         FIG. 11  is a partial cross-section view of an alternative of the dispensing head according to the invention; 
         FIG. 12  is a perspective view, according to a partial cross-section, of the application wall of an alternative of the head according to the invention; 
         FIG. 13  is a view equivalent to that of  FIG. 7  of an alternative of a head according to the invention; 
         FIG. 14  is a side view of a sixth dispensing device, in which the cap occupies its closing position; 
         FIG. 15  is a three-quarter frontal perspective view of the device of  FIG. 14 , with the cap having been removed from the dispensing head; 
         FIG. 16  is a cross-section view according to a vertical mid-plane of the device of  FIG. 14 ; 
         FIG. 17  is a top view of the dispensing head of the device of  FIG. 14 ; 
         FIG. 18  is a bottom view of the closing cap of the device of  FIG. 14 ; 
         FIG. 19  is a bottom view of the head of the device of  FIG. 14 ; 
         FIGS. 20 to 23  are views equivalent to that of  FIG. 17  of alternatives of dispensing heads according to the invention; 
         FIG. 24  is a view of a detail marked XXIV in  FIG. 16 ; 
         FIG. 25  is a view equivalent to that of  FIG. 16  of an alternative of a dispensing head according to the invention; 
         FIG. 26  is a detailed view equivalent to that of  FIG. 25  of an alternative dispensing head according to the invention; 
         FIG. 27  is a detailed view equivalent to  FIG. 26  of an alternative dispensing head according to the invention. 
     
    
    
     Below, the terms “upstream” and “downstream” generally refer to the normal direction of circulation of a fluid, in particular a cosmetic product. 
     A first cosmetic product-dispensing device  10  according to the invention is shown in  FIGS. 1 to 6 . 
     The device  10  is intended to store, dispense and optionally apply a cosmetic product on a keratin surface of a user. The keratin surface is in particular the skin or keratin fibers of a user, such as the hair, advantageously grouped into locks. 
     The cosmetic product contained in the device  10  is, for example, a liquid, creamy, gel or pasty product. This cosmetic product is, for example, a cosmetic product for care, maintenance or coloring of the skin or hair, or a body hygiene product, such as in particular a deodorant. 
     The dispensing device  10  according to the invention comprises a container  12  defining an internal volume  14  for receiving the cosmetic product, and a cosmetic product dispensing head  16 , closing the container  12 . 
     In the example shown in  FIG. 1 , the container  12  comprises a wall  18  that is deformable to the touch. This wall  18  is in particular deformable when it is pinched between a user&#39;s fingers. 
     Advantageously, the wall  18  of the container  12  forms a tube. The wall  18  is closed tightly at its upstream end  20  facing the head  16 , for example by bonding or welding. At its downstream end  22 , the wall  18  is closed selectively by the head  16 . 
     The container  12  extends according to a general longitudinal axis A-A′ between the ends  20 ,  22 . 
     In this example, the head  16  is attached to the downstream end  22  of the container  12 . It is, for example, attached by welding, or by insert molding of the wall  18  of the container  12  on the head  16 . In an alternative, the head  16  and the container  12  are at least partially produced in a single piece. 
     The interior volume  14  is defined inside the container  12 . It contains the cosmetic product. 
     As shown in  FIG. 1 , the head  16  comprises an application wall  30  and a cap  32  intended to cap the application wall  30 . It advantageously comprises a support  34  holding the application wall  30  and, in the example shown in  FIG. 1 , a plurality of elements  36  for contact with the keratin surface, with the contact elements  36  projecting with respect to the application wall  30 . 
     As shown in  FIG. 1 , the support  34  comprises an exterior skirt  38  secured to the wall  18  of the container  12 , and a sleeve  40  for attachment of the cap  32  extending the exterior skirt  38  in the downstream direction. The support  34  also comprises at least one element  42  for holding the cap  32  on the support  34  and, in reference to  FIG. 4 , a perforated reinforcement  44  for supporting the application wall  30 . 
     In this example, the support  34  is produced in a single piece from the same material. It is, for example, produced by injection molding from a thermoplastic material that is more rigid than that forming the application wall  30 , such as polyethylene (PE), polypropylene (PP) or mixtures thereof. 
     The exterior skirt  38  and the sleeve  40  define a central passage  45  for circulation of product that leads through an upstream opening  46  defined by the exterior skirt  38  and through a downstream opening  48  defined by the sleeve  40 . The circulation passage  45  extends the interior volume  14  in the downstream direction. 
     The sleeve  40  includes a peripheral tubular wall  50  and advantageously an annular edge  52  that projects partially toward the axis A-A′ of the tubular wall  50  in the downstream opening  48 . The edge  52  has, in this example, a shape curved in the downstream direction. 
     The support  34  has, in this example, a transverse exterior circular contour section. Alternatively, the exterior contour is elongated, and is, for example, oval or polygonal. 
     In the example shown in the figures, the cap  32  can be screwed onto the support  34 . The holding element  42  is then formed by a thread  54  projecting radially outwardly with respect to the sleeve  40 . 
     Alternatively, the cap  32  is snapped onto the support  34 . The holding element  42 , when it is present, is, for example, formed by means for snap-locking or holding the cap  32  clamping. 
     The reinforcement  44  projects transversally in the passage  45  at the level of the downstream opening  48 . It is resiliently deformable with respect to the sleeve  40  along the axis A-A′. 
     The reinforcement  44  is perforated. Projected in a perpendicular section according to axis A-A′, the span of the openings  68 ,  70  defined by the reinforcement  44  is greater than the span of the reinforcement  44 . 
     In this example, the reinforcement  44  comprises an exterior ring  60 , an interior disk  62 , a plurality of exterior tabs  64  for connection between the sleeve  40  and the reinforcement  44  and a plurality of interior tabs for connection  66  between the exterior ring  60  and the interior disk  62 . 
     The exterior ring  60  has an exterior contour contained in the interior contour defined by the sleeve  40  at the level of the edge  52 . 
     The exterior tabs  64  connect the ring  60  to the edge  52 . They define, between the ring  60  and the edge  52 , a plurality of exterior openings  68  for passage of the product. 
     In this example, the exterior tabs  64  define two C-shaped openings  68  opening toward one another, on each side of a first transverse axis B-B′. 
     The interior disk  62  has an exterior contour contained in the interior contour of the exterior ring  60 . It defines, with the exterior ring  60 , at least one interior opening  70 . 
     In the example shown in  FIG. 4 , the interior tabs  66  define two opposite C-shaped interior openings  70  opening toward one another, on each side of a second transverse axis C-C′ angularly offset with respect to the axis B-B′, and in particular perpendicular to the axis B-B′. 
     The application wall  30  is formed by a substantially flat body  80 . By “substantially flat”, we mean in particular that the thickness of the body  80  is less than 10 times its maximum dimension, in this case its diameter. 
     The thickness of the body  80  is, for example, less than 5 mm. The body  80  is advantageously produced with an elastomer base, such as elastomer, thermoplastic, thermoplastic elastomer, PEBD, PVC, PU, thermoplastic elastomer polyester materials, in particular butene terephthalate and esterified poly-tetramethylene oxide glycol copolymers, Hytrel®, EPDM, PDM, EVA, SIS, SEBS, SBS, latex, silicone, nitrile, butyl, polyurethane, polyether block amide, polyester, ethylene and α-olefin copolymers . . . . The material forming the wall  30  has a hardness lower than that of the material forming the support  34  and that of the material forming the cap  32 . 
     In this example, the body  80  has an exterior contour with a shape substantially complementary to the exterior contour of the sleeve  40 . It is thus capable of covering the sleeve  40  so as to close the downstream opening  48 . 
     In this example, the body  80  has a convex dome shape, with the convexity in the downstream direction. It bears at its periphery on the sleeve  40  and is attached to it. To this end, it is applied on the annular edge  52 . 
     In addition, the body  80  rests on the perforated reinforcement  44  by being attached to it. 
     As shown in  FIGS. 2 to 5 , the body  80  of the wall  30  defines at least one product dispensing orifice  82 A,  82 B, passing through the body  80  so as to open facing the downstream opening  48 , advantageously facing the passage openings  68 ,  70  formed in the reinforcement  44 . 
     In the example shown in the Figures, the body  80  of the application wall  30  defines a plurality of dispensing orifices  82 A,  82 B. 
     In particular, in the example shown in  FIG. 5 , the body  80  defines two exterior dispensing orifices  82 A, in particular C-shaped, and two interior dispensing orifices  82 B, in particular C-shaped. 
     The interior orifices  82 B are angularly offset with respect to the exterior orifices  82 A and are located between the exterior orifices  82 A. 
     The exterior orifices  82 A advantageously extend facing the exterior openings  68 , on each side of the axis B-B′. The interior orifices  82 B advantageously extend facing the interior openings  70 , on each side of the axis C-C′ angularly offset with respect to the axis B-B′. 
     In this example, the dispensing orifices  82 A,  82 B are formed by curved slots  84  provided through the body  80  between a downstream surface  86  of the body  80  and an upstream surface  88  of the body  80 . 
     In this example, the slots  84  extend, in a mid-plane section, according to a general axis D-D′ inclined with respect to a normal N to the downstream surface  86 , considered at the level of the outlet of the slot  84 . 
     Each orifice  82 A,  82 B thus defines, in the body  80 , a downstream lip  90  for closing the orifice  82 A,  82 B and a bearing edge  92  for the downstream lip  90 . 
     According to the invention, and as will be seen below, the application wall  30  is deformable at the periphery of the orifice  82 A,  82 B so as to enable the selective closing of each dispensing orifice  82 A,  82 B. 
     In the example shown in  FIG. 2 , each downstream lip  90  is thus mobile by bending between a position of opening of the orifice  82 A,  82 B, shown in  FIG. 2 , in which the orifice  82 A,  82 B is cleared, and a position of closing of the orifice  82 A,  82 B, shown in  FIG. 3 . 
     In the closing position, the application wall  30  has been resiliently deformed so as to close each orifice  82 A,  82 B. In particular, in this example, the lip  90  has been applied against the edge  92  so as to close the slot  84 . 
     In this example, the application wall  30  also comprises a pressure equalizing orifice  94  passing through the application wall  30 . This orifice  94  is, for example, arranged at the center of the application wall  30 . 
     In the example shown in the figures, the head  16  comprises a plurality of contact elements  36  distributed over the downstream surface  86 . 
     Each contact element  36  thus projects downstream from the downstream surface  86 . In this example, the contact elements  36  are in a single piece with the application wall  30 . They extend in particular substantially parallel to one another according to the axis A-A′. Alternatively (not shown), they extend at an incline with respect to the axis A-A′. 
     The contact elements  36  thus form separation/combing members defining spaces for the passage of keratin fibers. 
     As shown in  FIGS. 1 and 6 , the cap  32  comprises a downstream closing wall  100 , and a side wall  102  projecting from the closing wall  100  so as to define an upstream volume  104  for receiving the wall  30 . 
     The cap  32  also comprises at least one bearing element  106 A,  106 B,  106 C on the application wall  30  and, advantageously, a projection  108  for closing the pressure equalizing orifice  94 , when such an orifice is present. 
     The cap  32  also comprises a complementary holding element  110  intended to cooperate with the holding element  54 . 
     The side wall  102  is tubular. It projects from the periphery of the downstream wall  100 . The downstream wall  100  defines a downstream surface  112  suitable for being placed on a planar support so as to hold the device  10  upside down. 
     The downstream surface  112  is, for example, planar. 
     In an alternative (not shown), the cap  32  comprises a plurality of additional elements for contact with a keratin surface of a user. These elements project downstream from the downstream surface  112 . 
     In this example, the cap  32  has a plurality of bearing elements  106 A,  106 B,  106 C spaced apart from one another so as to bear on different regions of the application wall  30 . 
     Thus, in reference to  FIG. 6 , the cap  32  comprises an exterior bearing element  106 A, intended to be applied on a peripheral exterior region of the downstream surface  86 , outside of the dispensing orifices  82 A,  82 B, an intermediate bearing element  106 B, intended to be applied on the downstream surface  86 , so as to cause the closing of the exterior orifices  82 A and an interior bearing element  106 C, intended to bear on the upper surface  86  so as to cause the closing of the interior orifices  82 B. 
     In this example, the bearing elements  106 A,  106 B,  106 C are all formed by concentric cylindrical skirts having axis A-A′. 
     When the application wall  30  has a curved shape, the exterior bearing element  106 A has a height, parallel to the axis A-A′, between the upper wall  100  and a free edge  107 , greater than the height of the intermediate bearing element  106 B, with this height being itself greater than that of the interior bearing element  106 C. 
     The bearing elements  106 A,  106 B,  106 C mutually define intermediate insertion spaces intended to receive contact elements  36 . 
     The closing projection  108  projects into the volume  104  from the upper wall  100 . It has an end pin  114  intended to be introduced into the pressure equalizing orifice  94  so as to close it. 
     In the example in which the cap  32  is intended to be screwed onto the support  34 , the complementary holding element  110  is formed by a thread complementary to the thread present on the support  34 . 
     In this example, the cap  32  is made in a single piece of a more rigid material, for example with a higher hardness, than the material forming the application wall  30 . 
     In general, the bearing elements  106 A,  106 B,  106 C have a rigidity greater than that of the application wall  30 , in particular in the vicinity of the orifices  82 A,  82 B. 
     The cap  32  is mobile between a position for closing the head  16 , shown in  FIG. 3 , and a product dispensing position, shown in  FIG. 1 . 
     In the dispensing position, the cap  32  is arranged at a distance from the support  34  and the application wall  30 . 
     In this position, and as will be seen below, the dispensing orifices  82  are cleared or are capable of being cleared, so as to enable the cosmetic product to pass from the interior volume  14  through the passage  45  to the downstream surface  86  of the application wall  30 . 
     In the closing position shown in  FIG. 3 , the cap  32  is engaged on the support  34  around it. 
     The holding elements  54  are engaged with the complementary holding elements  110 . 
     In this position, the exterior bearing element  106 A is applied on the upper surface  86  of the wall  30 , in the vicinity of the periphery of this surface. It thus produces a peripheral seal. 
     The intermediate bearing element  106 B is applied on a region of the downstream surface  86  located in the vicinity of each exterior orifice  82 A so as to deform this region and close the exterior orifice  82 A. 
     In particular, in the example shown in  FIG. 3 , the intermediate element  106 B is applied on the downstream lip  90  defining the exterior orifice  82 A and deforms this lip  90  so as to place it in contact with the upstream bearing edge  92 . This deformation produces the substantially complete closing of each exterior orifice  82 A. 
     Similarly, the bearing element  106 C is applied on a region of the downstream surface  86  located in the vicinity of each interior orifice  82 B so as to deform this region and close the interior orifice  82 B. 
     In particular, in the example shown in  FIG. 2 , the interior element  106 C is applied on the downstream lip  90  defining the interior orifice  82 B and deforms this lip  90  so as to place it in contact with the upstream bearing edge  92 . This deformation causes the substantially complete closing of each interior orifice  82 B. 
     The closing of each dispensing orifice  82 A,  82 B is performed by a simple contact between the upper surface  86  and the free edge  107  of the bearing element  106 B,  106 C, without the bearing element  106 B,  106 C being inserted into the orifice  82 A,  82 B. 
     As shown in  FIG. 3 , the device  10  can then be stored upside down, with the cap  32  being located below the container  12 . The orifices  82 A,  82 B are kept closed by the cooperation between each rigid bearing element  106 B,  106 C and the deformable region of the application wall  30  on which the bearing element  106 B,  106 C is applied. 
     In addition, when the air equalizing orifice is present, the closing projection  108  is applied around the orifice and the pin  114  tightly closes the orifice  94  by being inserted in it. 
     The application wall  30  and the contact elements  36  are advantageously made of a single piece by molding. 
     The orifices  82 A,  82 B are then produced, either during molding of the application wall  30  or after this molding, by providing openings by laser or mechanical cutting of the wall  30 . 
     The use of a flexible material to produce the application wall  30  ensures that the molding of the orifices  82 A,  82 B can be performed simply, in particular at the level of the undercut parts located in the slots  84  between the lip  90  and the edge  92 . 
     The device  10  according to the invention works as follows. 
     Initially, when the device  10  is stored, the cap  32  occupies its closing position engaged on the support  34 , as shown in  FIG. 3 . The application wall  30  is received in the upstream volume  104 . The holding elements  54 ,  110  cooperate with one another to hold the cap  32  in position with respect to the support  34  and with respect to the application wall  30 . 
     In this position, and as seen above, the bearing elements  106 B,  106 C bear on the application wall  30  in the vicinity of the dispensing orifices  82 A,  82 B so as to close them. 
     When the user wishes to apply the cosmetic product, he or she releases the cap  32  so as to move it away from the head  16 . The user then extracts the cosmetic product present in the interior volume  14  by pushing the product into the interior volume  14 . This pushing can be produced by deformation of the wall  18  of the container  12  so as to place the contents of the container  12  under pressure. 
     The cosmetic product present in the container  12  then passes through the passage  45  and bears on the lips  90  so as to clear the dispensing orifices  82 . The product then flows through the orifices  82 A,  82 B to the downstream surface  86  of the application wall  30 . 
     The cosmetic product then impregnates the spaces between the contact elements  36 , when they are present. 
     The user brings the downstream surface  86  of the application wall  30  into contact with a keratin surface, for example in contact with a lock of fibers. The cosmetic product is then applied on the keratin surface. 
     When the user has completed the product application, he or she replaces the cap  32  in its closing position, which closes the orifices  82 A,  82 B, as seen above. 
     The head  16  according to the invention is therefore particularly effective for dispensing the cosmetic product from the container  12 , while maintaining a sealed confinement of the product in the container  12 , when the device  10  is not used. 
     It is thus possible to mount and firmly hold the cap  32  on the support  34  of the wall  30  without the risk of leakage of the product, in particular when the device  10  is stored upside down. This holding can be ensured by screwing. The exterior bearing element  106 A also ensures an adequate seal, by adding an external skirt. 
     In an alternative (not shown), the head  14  has an exterior transverse non-circular section, for example elliptical or polygonal. In this case, the cap  32  is snapped onto the support  34  by a simple translation movement along the axis A-A′, without rotation around this axis A-A′. 
     In another alternative (not shown), the device  10  comprises a dispensing mechanism, such as a piston capable of being moved in the interior volume  14  so as to push the cosmetic product toward the head  16 . 
     In an alternative, the dispensing orifices  82 A,  82 B are rectilinear, and not curved. 
     In an alternative, shown with dotted lines in  FIG. 2 , the head  16  comprises a projection  118  for activating the deformation of the wall  30 , intended to be inserted between the wall  30  and a bearing element  106 B,  106 C when the cap  32  occupies its closing position. 
     The activation projection  118  projects, for example, toward the cap  32  from the application wall  30 . Advantageously, the activation projection  118  extends from a lip  70 . It is formed in particular by a protuberance. 
     Alternatively, the projection  118  projects toward the application wall  30  from a bearing element  106 B,  106 C. 
     In another alternative, the downstream surface  86  of the application wall is textured. It has, for example, a plurality of recesses and protuberances, as seen on a golf ball. 
       FIGS. 7 to 10  show alternatives of the dispensing head  16  for dispensing devices according to the invention. 
     A second device  120  according to the invention is shown in  FIG. 7 . 
     The head  16  of the device  120  is free of contact elements  36 . The downstream surface  86  is then smooth. 
     In this device  120 , the orifices  82 A,  82 B are advantageously produced by laser cutting. 
     A third device  130  according to the invention is shown in  FIG. 8 . 
     In this device, the contact elements  36  are massage elements. They have a short length, in particular a length less than the height of the support  34 , along the axis A-A′. The massage elements comprise a flat area  132  at their free ends. 
     In an alternative (shown with dotted lines) of the device of  FIG. 8 , the massage elements comprise, at their free ends, a substantially spherical ball. Each contact element  36  has substantially a mushroom shape. 
     A fourth device  140  according to the invention is shown in  FIG. 9 . 
     Unlike the first device  10 , the head  16  comprises contact elements  36  formed by scraping blades  142 . The blades  142  are arranged externally with respect to the orifices  82 A,  82 B, on each side of the axis B-B′, in the vicinity of the periphery of the application wall  30 . 
     The blades  142  have, in a section along a plane perpendicular to the axis A-A′, a C-shaped contour. They are advantageously made in one piece with the application wall  30 . 
       FIG. 10  shows the head  14  of a fifth device  150  according to the invention. Unlike the devices shown above, the application wall  30  is more rigid than each bearing element  106 B,  106 C. Each bearing element  106 B,  106 C is locally deformable in the vicinity of the orifice  82 A,  82 B on each side of it. 
     The bearing element  106 B,  106 C thus has two deformable and separate contact regions  152 A,  152 B. The regions  152 A,  152 B are intended to be applied on the downstream surface  86 , on each side of the orifice  82 A,  82 B. 
     The bearing element  106 B,  106 C advantageously has, between the regions  152 A,  152 B, a hollow intermediate region  154  intended to be placed facing and outside the orifice  82 A,  82 B when the cap  32  occupies its closing position. 
     In the first device  10  according to the invention, the bearing elements  106 B,  106 A are applied directly on the downstream surface  86  at a distance from the dispensing orifice  82 A,  82 B. 
     In the alternative shown in  FIG. 11 , the application wall  30  defines a peripheral surface  200  located on its edge, in its thickness, between the downstream surface  86  and the upstream surface  88 . At least one bearing element  106 D laterally bears on the peripheral surface  200  of the wall  30  so as to close each orifice  82 A,  82 B. 
     In the alternative shown in  FIG. 12 , the wall  30  has an elongated shape according to a middle axis X-X′. In this case, the cap is snapped onto the support  34 , as described above. The slots defining the dispensing orifices  82 A,  82 B are, for example, present on the wall  30  on each side of the longitudinal axis X-X′. 
     Advantageously, the wall  30  has a curved shape so that the downstream surface  86  is convex and the upstream surface  88  is concave. 
     In this case, a bearing element (not shown) formed by an elongated skirt according to the axis X-X′ or by a straight rib extending substantially along the axis X-X′ is used to close each dispensing orifice  82 A,  82 B during contact of the bearing element on the application wall. 
     In an alternative (not shown), the upper wall  100  of the cap  32  directly forms the application element applied on the wall  30 . 
     In the alternative shown in  FIG. 13 , the contact elements  36  are formed by elongate blade-type pins  210 . The elongate pins have axes of extension substantially parallel to a common Y-Y′ axis. Thus, the head  14  shown in  FIG. 13  can be used in a first direction, parallel to the axis Y-Y′ of extension of the pins  210  for the formation and may be used according to an axis Z-Z′ perpendicular to the axis of extension of the pins  210 , for plaiting hair. 
     The terms “one”, “two”, and so on should be understood as meaning “at least one”, “at least two”, unless otherwise indicated. 
     A sixth cosmetic product dispensing device  310  according to the invention is shown in  FIGS. 14 to 19 and 24 . 
     A device  310  is intended to store, dispense and optionally apply a cosmetic product on a keratin surface of a user. The keratin surface is in particular the skin or the keratin fibers of a user, such as the hair, advantageously grouped into locks. 
     The cosmetic product contained in the device  310  is, for example, a liquid, creamy, gel, or pasty cosmetic product. This cosmetic product is advantageously a body hygiene product, such as, in particular, a deodorant. Alternatively, the product is a cosmetic product for care, maintenance or coloring of the skin or the hair. Alternatively, the cosmetic product contained in the device  310  is a sun protection product, or a makeup product. 
     The dispensing device  310  according to the invention comprises a container  12  defining an interior volume  14  for receiving the cosmetic product, and a cosmetic product dispensing head  16 , closing the container  12  (seen in  FIG. 15 ). 
     In the example shown in  FIGS. 14 and 15 , the container  12  comprises a wall  18  that advantageously forms a tube. The wall  18  is closed tightly at its upstream end  20  facing the head  16 . At its downstream end  22 , the wall  18  is closed by the head  16 . 
     The base of the wall  18  is advantageously closed by pinching and by welding of the wall  18 . 
     In an alternative, the container  12  comprises a wall  18  deformable to the touch. This wall  18  is in particular deformable when it is pinched between the fingers of a user. 
     The container  12  extends according to a general longitudinal axis A-A′ between the ends  20 ,  22 . 
     Alternatively, the head  16  is attached to the downstream end  22  of the container  12 . 
     Advantageously, the head  14  is attached to the neck of the container  12  and is attached to the neck by snap-locking. To this end, the head  14  is snapped on the neck of the container  12  and is held on the neck with stops. 
     Alternatively, the head  16  is attached by welding, or by insert molding of the wall  18  of the container  12  on the head  14 . In another alternative, the head  14  and the container  12  are at least partially made in a single piece. 
     In this example, the container  12  contains a dispensing mechanism (not shown) suitable for pushing the cosmetic product contained in the interior volume  14  toward the head  16  out of the container. This dispensing mechanism advantageously comprises a piston (not shown), and a piston maneuvering mechanism (not shown) accessible from outside. 
     The interior volume  14  is defined inside the container  12 . It contains the cosmetic product. 
     As shown in  FIGS. 15, 16 and 24 , the head  14  comprises an application wall  30  and a cap  32  intended to cap the application wall  30 . It advantageously comprises a support  34  holding the application wall  30 . 
     As shown in  FIG. 16 , the support  34  comprises an interior skirt  38 , attached on the wall  18  of the container  12 , and an exterior sleeve  40  for attachment of the cap  32  arranged around the skirt  38 . The support  34  also comprises at least one element  42  for holding the cap  32  on the support  34  and, in reference to  FIG. 19 , a perforated reinforcement  44  for holding the application wall  30 . 
     In this example, the support  34  is made in a single piece of the same material. It is, for example, produced by insert molding using a thermoplastic material that is more rigid than that forming the application wall  30 , such as polyethylene (PE), polypropylene (PP) or mixtures thereof. 
     Alternatively, the support  34  directly forms the application wall  30 . 
     The skirt  38  defines a central passage  45  for circulation of the product that leads through an upstream opening  46  through a downstream opening  48 . The circulation passage  45  extends the interior volume  14  downstream. 
     The sleeve  40  includes a peripheral tubular wall  50  and a downstream bridge  312  connecting it to the skirt  38 . The skirt  38  advantageously defines an annular edge  52  that projects partially toward the axis A-A′, with the edge  52  being extended upstream by a sealing skirt  313  inserted into the neck of the container  12  so as to hold the product. 
     The support  34  has, in this example, a cross-section with a circular exterior contour. Alternatively, the exterior contour is elongated, for example oval or polygonal. 
     In the example shown in the figures, the cap  32  can be screwed onto the support  34 . The holding element  42  is then formed by a thread  54  projecting radially outwardly with respect to the sleeve  40 . 
     Alternatively, the cap  32  is snapped onto the support  34 . The holding element  42 , when it is present, is, for example, formed by means for snap-locking or holding the cap  32  by clamping. 
     The reinforcement  44  projects transversally in the passage  45  at the level of the downstream opening  48 . It is rigid or semi-rigid. 
     The reinforcement  44  is perforated. In the example shown in  FIG. 19 , the reinforcement  44  comprises an interior disk  62  and a plurality of exterior tabs  64  for connection between the edge  52  of the skirt  38  and the reinforcement  44 . 
     The exterior tabs  64  connect the edge  52  of the skirt  38  to the disk  62 . They define, between the skirt  38  and the disk  62 , a plurality of exterior product passage openings  68 . 
     In this example, the exterior tabs  64  define a plurality of C-shaped openings  68  opening toward one another facing the axis A-A′. 
     In this example, the number of openings  68  is equal to 3. More generally, this number is between 1 and 10. 
     The interior disk  62  has an exterior contour contained in the interior contour of the skirt  38 . 
     The application wall  30  is formed by a polymer material body  80 . The thickness of the body  80  is, for example, less than 5 mm. The body  80  is advantageously based on an elastomer, such as elastomer, thermoplastic, thermoplastic elastomer, PEBD, PVC, PU, thermoplastic elastomer polyester materials, in particular butene terephthalate and esterified poly-tetramethylene oxide glycol copolymers, Hytrel®, EPDM, PDM, EVA, SIS, SEBS, SBS, latex, silicone, nitrile, butyl, polyurethane, polyether block amide, polyester, ethylene and α-olefin copolymers. In this embodiment, the material forming the wall  30  has a hardness lower than that of the material forming the support  34  and that of the material forming the cap  32 . 
     The support  34  and the wall  30  are advantageously formed by bi-injection of material. In an alternative, the support  34  and the wall  30  are formed by injection of the same material. 
     In this example, the body  80  has an exterior contour with a shape substantially complementary to the exterior contour of the support  34 . It is thus capable of covering the support  34  in order to close the downstream opening  48 . 
     In this example, the body  80  has a convex dome shape, with a convexity directed downward. It bears at its periphery on the support and is attached on it. To this end, it is applied on the annular edge  52 , and on the bridge  312 . 
     In addition, the body  80  rests on the perforated reinforcement  44  by being attached to it. 
     As shown in  FIGS. 17 and 19 , the body  80  of the wall  30  defines at least one product dispensing orifice  82 A, passing through the body  80  so as to open facing the downstream opening  48 , advantageously facing the through-openings  68  provided in the reinforcement  44 . 
     In the example shown in the figures, the body  80  of the application wall  30  defines a plurality of dispensing orifices  82 A, in particular C-shaped. 
     The orifices  82 A advantageously extend facing the openings  68 . 
     In this example, the dispensing orifices  82 A are formed by curved slots  84  provided through the body  80  between a downstream surface  86  of the body  80  and an upstream surface  88  of the body  80 . 
     In this example, the slots  84  extend, in a mid-plane section, according to a general axis D-D′ corresponding to a normal N to the downstream surface  86 , considered at the level of the outlet of the slot  84 . Alternatively, the slots extend according to an axis D-D′ inclined with respect to a normal N to the downstream surface  86 . 
     As shown in  FIG. 17 , the dispensing orifices  82 A are off-centered with respect to the central axis A-A′ of the wall  30 . The central axis A-A′ is defined as the axis passing through the center of the downstream surface  86  of the wall  30 , normal to this surface. In this example, the central axis A-A′ coincides with the general axis A-A′ of the container  12 . 
     The distance d0 radially separating the axis A-A′ of each orifice  82 A is greater than the radial er maximum span of each orifice  82 A. Thus, as shown in  FIG. 17 , the wall  30  has a solid central area  320 , free of an orifice  82 A, in particular at the level of the axis A-A′. 
     In an alternative, the application wall  30  also defines a pressure equalizing orifice (not shown) passing through the application wall  30 . This orifice is, for example, arranged at the center of the application wall  30  in the central area  320 . 
     The slots  84  have a length much greater at their radial span er. Thus, the length of each slot  84  is at least greater than twice the maximum radial span er of the slot  84 . Advantageously, the radial span of each slot  84  is non zero, and the slots  84  are opened. 
     The orifices  82 A are separate, i.e. they are separated from one another by solid regions of the application wall  30 . In this example, the minimum distance do separating two adjacent orifices  82 A is greater than the maximum radial span er of each orifice  82 A. 
     In the example of  FIG. 17 , the orifices  82 A are distributed angularly around the axis A-A′, according to a circumference around this axis. 
     The angular span of each orifice  82 A around the axis A-A′ is less than 360°/N in which N is the number of orifices  82 A over a circumference. The angular span of each orifice  82 A is in particular less than (360°-10N)/N. 
     More generally, the maximum radial span er of each orifice  82 A, with respect to the axis A-A′, is less than 5 mm, and in particular less than 1 mm. This radial span is advantageously greater than 0.4 mm. Thus, the edges of each orifice  82 A are constantly located at a distance from one another. 
     Each dispensing orifice  82 A is placed facing an opening  68 . 
     Each orifice  82 A, however, has an area below the area of the opening  68  facing which it is placed. Thus, as shown in  FIG. 19 , the wall  30  defines, around each orifice  82 A, and facing the opening  68 , a peripheral edge  322 . 
     Alternatively, each orifice  82 A has a span substantially equal to the opening  68  facing which it is located. In yet another alternative (see e.g.  FIG. 27 ), the orifice  82 A is off-centered with respect to the opening  68 . It is for example located along an edge of the opening  68 . In this case, the peripheral edge  322  has a substantial width and is capable of directing the product dispensing through the orifice  82 A so as to improve its distribution over the downstream surface  86 . 
     In the example shown in  FIGS. 14 to 19 , each dispensing orifice  82 A is constantly clear, even when the cap  32  occupies a closing position mounted on the support  34 . Thus, at any time, the dispensing orifice  82 A is clear over the entire width of the body  80 , and no element is attached in the thickness of the dispensing orifice  82 A or penetrates the thickness of the dispensing orifice  82 A. 
     As will be seen below, each dispensing orifice  82 A can be closed in the downstream direction by the cap  32  when the cap  32  occupies its closing position. 
     In the example shown in  FIGS. 14 to 19 , the downstream surface  86  of the wall is smooth. To this end, it lacks roughnesses or macroscopic projections. 
     By “roughness or macroscopic projection”, we mean a roughness or a projection with a thickness, measured perpendicularly to a normal to the wall  30 , that is greater than the thickness of the wall  30 . 
     Thus, the wall  30  is capable of sliding over the skin of a user. It is in particular free of roughnesses or macroscopic projections at the periphery of the openings  82 A, allowing for a pleasant application of the product over a body surface of the user. 
     As shown in  FIG. 16 , the cap  32  comprises a downstream closing wall  100 , and a side wall  102  projecting from the closing wall  100  so as to define an upstream volume  104  for receiving the wall  30 . 
     The cap  32  also comprises at least one bearing element  106 B on the application wall  30 . 
     The cap  32  also includes a complementary holding element  110 , intended to cooperate with the holding element  54  on the support  34 . 
     The side wall  102  is tubular. It projects from the periphery of the downstream wall  100 . The downstream wall  100  defines a downstream edge  325  suitable for being placed on a planar support so as to hold the device  10  upside down. The downstream edge  325  is, for example, planar. 
     The downstream wall  100  in this case has a dish shape projecting inwardly. It comprises, in this example, a peripheral skirt  326  and a central dome  328 . 
     In this example, and as shown in  FIGS. 18 and 24 , the cap  32  has a bearing element  106 B which revolves about the axis A-A′ of the cap  32 . This bearing element  106 B is, for example, annular. It projects inwardly from the downstream wall  100 . According to the invention, the bearing element  106 B has a first exterior region of contact  152 A with the application wall  30  and a second interior region  152 B of contact with the application wall  30 . 
     In this example, each contact region  152 A,  152 B has a closed contour so as to ensure a peripheral seal. 
     The regions  152 A,  152 B are separate. The interior region  152 B is contained inside the surface defined by the exterior region  152 A. The regions  152 A,  152 B are advantageously concentric, having axis A-A′. 
     The regions of contact  152 A,  152 B mutually define an annular intermediate hollow region  154  intended to be placed facing the orifices  82 A. 
     Each contact region  152 A,  152 B hence protrudes from the hollow region  154 . 
     In reference to  FIG. 17 , the minimum radial distance dr separating the first region  152 A from the second region  152 B is greater than the maximum radial span er of the orifices  82 A and in particular greater than 3 times the radial span er. 
     However, the maximum radial distance dr separating the first region  152 A from the second region  152 B is less than 10 times, advantageously 5 times the maximum radial span er of the orifices  82 A. 
     The maximum radial distance dr is for example greater than 0.5 mm and in particular comprised between 0.5 mm and 10 mm, advantageously between 2 mm and 5 mm. 
     In this example, the cap  32  is made in a single piece of a more rigid material, for example with a higher hardness, than the material forming the application wall  30 . 
     In general, in this embodiment, the bearing element  106 B has a rigidity greater than or equal to that of the application wall  30 , in particular in the vicinity of the orifices  82 A. 
     Alternatively, the application wall  30  has a rigidity greater than or equal to that of the bearing element  106 B, in particular in the vicinity of the orifices  82 A. 
     The cap  32  is mobile with respect to the support  34  and to the wall  30  between a head closing position and a dispensing position. 
     In the closing position, the cap  32  is engaged on the support  34  around it. The holding elements  54  are engaged with the complementary holding elements  110 . 
     In this position, the contact regions  152 A,  152 B are applied on the application wall  30  and advantageously deform it so as to provide a seal over the entire periphery around the axis A-A′, radially inside and outside the orifices  82 A. 
     An effective closing of the orifices  82 A in the downstream direction is therefore performed in a simple and inexpensive manner. No bearing element  106 B is inserted in the orifices  82 A, thereby limiting the risk of pollution and ensuring an ease of use, and a more effective seal. 
     The device  310  can then be stored upside down, with the cap  32  being located below the container  12 . The orifices  82 A are kept closed by the cooperation between each bearing element  106 B and the deformable application wall  30  on which the bearing element  106 B is applied. 
     As shown in  FIG. 24 , when the cap  32  occupies its position for closing the head  16 , the regions  152 A,  152 B are in contact with the downstream surface  86  and define, facing the downstream surface  86 , a closed cosmetic product confinement volume  330 . 
     The closed volume  330  is tightly circumferentially closed by the contact regions  152 A,  152 B and in the downstream direction by the hollow region  154 . 
     In this position, and in reference to  FIG. 17 , the minimum radial distance d1 separating each orifice  82 A of the first region  152 A or of the second region  152 B is preferably greater than the maximum radial span er of the orifice  82 A. In addition, this maximum radial distance is advantageously less than 5 times the maximum radial span er of the dispensing orifice  82 A. 
     Distance d1 is usually less than or equal to 5 mm and is advantageously comprised between 0.25 mm and 5 mm. 
     Similarly, the maximum distance separating the downstream surface  86  from the bearing element  106 B along an axis D-D′ normal to the surface  86 , measured at the level of the orifice  82 A, which corresponds to the depth of the hollow region  154 , is less than 5 mm. 
     Thus, the free volume defined facing the closed area  330  is minimal. This volume is, for example, less than 1 ml, and is advantageously less than 0.2 ml. 
     In the dispensing position, the cap  32  is arranged at a distance from the support  34  and the application wall  30 . 
     In this position, and as will be seen below, the dispensing orifices  82 A are cleared so as to enable the cosmetic product to pass from the interior volume  14  through the passage  45  to the downstream surface  86  of the application wall. 
     In the example in which the cap  32  is intended to be screwed onto the support  34 , the complementary holding element  110  is formed by a thread complementary to the thread present on the support  34 . 
     The application wall  30  is advantageously made in a single piece by molding. 
     The orifices  82 A,  82 B are then produced, either during molding of the application wall  30 , or after this molding, by providing openings by laser or mechanical cutting of the wall  30 . 
     The use of a flexible material to produce the application wall  30  ensures that the molding of the orifices  82 A,  82 B can be produced simply. 
     The device  310  according to the invention works as follows. 
     Initially, when the device  310  is stored, the cap  32  occupies its closing position engaged on the support  34 , as shown in  FIG. 14 . The application wall  30  is received in the upstream volume  104 . The holding elements  54 ,  110  cooperate with one another to hold the cap  32  in position with respect to the support  34  and with respect to the application wall  30 . 
     In this position, and as seen above, the bearing element  106 B bears on the application wall  30  in the vicinity of the dispensing orifice  82 A so as to close them. 
     To this end, each region  152 A,  152 B forms a contact line that produces a sealed contact on the wall  30 . The width of each contact region  152 A,  152 B is then less than 5 times the maximum radial span er of each opening  82 A. 
     The width of each contact region  152 A,  152 B is, for example, between 0.25 mm and 4 mm. 
     Each contact region  152 A,  152 B is also arranged at a distance from the openings  68  provided through the support  34 , facing a solid region of the support  34 . 
     The cosmetic product present in the interior volume  14  is then incapable of flowing out of the device  310 , since it is confined in the closed area  330  defined between the contact regions  152 A,  152 B and by the hollow region  154 . 
     When the user wishes to apply the cosmetic product, he or she releases the cap  32  so as to move it away from the head  16 . The user then extracts the cosmetic product present in the interior volume  14  by pushing the product into the interior volume  14 . 
     The cosmetic product present in the container  12  then passes into the passage  45 . It then flows through the orifices  82 A to the downstream surface  86  of the application wall  30 . Advantageously, the cosmetic product raises the edge  322  around the orifice  82 A. 
     The cosmetic product then impregnates the downstream surface  86 . 
     The user brings the downstream surface  86  of the application wall  30  in contact with a body surface, for example in contact with the skin. The cosmetic product is then applied on the body surface. 
     When the user has completed the product application, he or she returns the cap  32  to its closing position, closing the orifices  82 A, as seen above. 
     The head  16  according to the invention is therefore particularly effective for dispensing the cosmetic product from the container  12 , while keeping a sealed confinement of the product in the container  12 , when the device  10  is not used. 
     It is thus possible to mount and firmly hold the cap  32  on the support  34  of the wall  30  without any risk of leakage of the product, in particular when the device  10  is stored upside down. This holding can be ensured by screwing. 
     In an alternative (not shown), the head  14  has an exterior transverse non-circular section, for example elliptical or polygonal. In this case, the cap  32  is snapped onto the support  34  by a simple translation movement along the axis A-A′, without rotation around this axis A-A′. 
     In another alternative, the downstream surface  86  of the application wall is textured. It has, for example, a plurality of recesses and protuberances, as seen on a golf ball. 
     In one alternative, shown for example in  FIG. 20 , the dispensing orifices  82 A,  82 B are rectilinear and not curved. 
     The orifices  82 A,  82 B have lengths that can be different from one another. For example, a first group of orifices  82 A has a length lower than that of a second group of orifices  82 B. 
     In another alternative shown in  FIG. 21 , the application wall  30  defines a first group of orifices  82 A located radially outside a second group of orifices  82 B. 
     The orifices  82 A are, for example, distributed over an exterior circumference of the application wall  30 , while the orifices  82 B of the second group are distributed over an interior circumference of the application wall  30 . 
     In this example, the cap  32  comprises at least one first exterior bearing element  106 B and at least one second interior bearing element  106 C. The exterior bearing element  106 B is intended to tightly close the orifices  82 A of the first group and the interior bearing element  106 C is intended to tightly close the orifices  82 B of the second group. Each bearing element  106 B,  106 C thus defines a first exterior contact region  152 A and a second interior contact region  152 B mutually defining a closed confinement area  330 . Thus, the confinement area  330  defined by the interior bearing element  106 B is placed facing each orifice  82 A of the first group. The confinement area  330  defined by the interior bearing element  106 C is placed facing each orifice  82 B of the second group. 
     The bearing elements  106 B,  106 C mutually define, on the downstream surface  86 , a solid intermediate region  332  without orifices  82 A,  82 B. 
     Another alternative of the application head  16  is shown in  FIG. 22 . In this alternative, the dispensing orifices  82 A are formed by holes with a circular or oblong section, and not by slots. 
     The maximum transversal dimension of each orifice  82 A is less than twice the minimum transversal dimension of the orifice  82 A. 
     Yet another alternative of the head  16  according to the invention is shown in  FIG. 23 . In this alternative, each closed confinement area  330  contains a single orifice  82 A. To this end, the cap  32  comprises a bearing element  106 B to  106 G associated with each orifice  82 A. Each bearing element  106 B to  106 G defines an exterior contact region  152 A, an interior contact region  152 B and intermediate contact regions  152 C with the application wall  30 . Each intermediate contact region  152 C connects an interior contact region  152 A and an exterior contact region  152 B. The contact regions  152 A to  152 C thus define, around each orifice  82 A, a closed contact line. 
     Thus, each contact region  152 A,  152 B extends over a portion of the circumference around the axis A-A′, and not over the entire circumference. 
     The operation of the dispensing heads  16  described in  FIGS. 21 to 23  is equivalent to the operation of the head  16  described in  FIGS. 14 to 19 . 
     An alternative of the head  16  according to the invention is shown in  FIG. 25 . In this alternative, the application wall  30  is formed directly on the support  34  in a single piece with the support  34 . 
     In addition, the head  16  comprises a member  400  for reducing the dead volume inside the central product circulation passage  45 . In this example, the member  400  is formed by a dome  402  projecting upward from the wall  30  in the central passage  45 . The dome  402  is, in this case, attached to the wall  30  by means of an interior skirt  404  engaged in the dome  402 . Alternatively, the member  400  is in a single piece with the wall  30  and/or with the support  34 . 
     The dome  402  has a curved shape at its upstream end. It defines a circumferential space  406  for the passage of cosmetic product. 
     The presence of the member  400  limits the amount of product present in the head  16 , in a location that cannot be compressed radially by the user. Thus, the volume of product contained in the container  12  that is not directly usable by a user is minimized. 
     In the embodiment of  FIG. 26 , the application wall  30  of the head  16  has at least one additional contact protrusion  500 A,  500 B located advantageously along the lateral edge of each orifice  82 A. 
     In this example, each protrusion  500 A,  500 B protrudes externally from the downstream surface  86 . It is formed by an annular bead. 
     In the closing position of the cap  32 , each protrusion  500 A,  500 B contacts a bearing element  1068 . 
     At least one contact protrusion  500 A,  500 B has a closed countour  50  so as to ensure a peripheral seal. 
     In this example, the application wall  30  defines an exterior contact protrusion  500 A and an interior contact protrusion  500 B located respectively along opposite radial edges of the orifice  82 A. 
     The contact protrusions  500 A,  500 B hence contact the bearing element  102 B in the closed volume  330  defined between the regions of contact  152 A,  152 B. 
     When the cap  32  occupies its closing position, the bearing element  106 B applies pressure on the application wall  30  in the contact regions  152 A,  152 B, since these regions  152 A,  152 B are located in register with the reinforcement  44 . 
     The bearing element  106 B applies a lower pressure on the contact protrusions  500 A,  500 B, and slightly bends the edges  322  of the application wall  30  located around the opening  68 . 
     In a variation (not shown), the contact protrusions  500 A,  500 B form directly the first exterior contact region and the second interior contact region. No protrusion is provided on the bearing element  106 B. 
     In the example of  FIG. 27 , the intermediate region  154  located between the first exterior contact region  152 A and the second interior contact region  152 B is also at least partially in contact with the downstream surface  86  of the application wall  30 . The pressure applied by the first contact region  152 A and by the second contact region  152 B on the wall  30  is nevertheless higher than the pressure applied on the wall  30  by the intermediate region  154 . 
     In another variation, the downstream surface  86  of the application wall is covered with a removable cover before its first use to close the dispensing orifices  82 A. 
     Generally, in all of the embodiments, the total span of the orifices  82 A is less than 20%, or even less than 10% of the total span of the downstream surface  86  of the application wall  30 .