Patent Publication Number: US-10786066-B2

Title: Packaging and dispensing device for dual content

Description:
CROSS REFERENCE TO RELATED APPLICATIONS 
     This application is the National Phase of Application No. PCT/CN2016/072042 filed Jan. 25, 2016 under 35 U.S.C. § 119, the entire contents of which is hereby incorporated by reference. 
     The present invention relates to a packaging and dispensing device for fluid products, preferably cosmetic products. More specifically, the present invention relates to a packaging and dispensing device comprising: a container for storing a first fluid composition, said container comprising an opening; a pipette removably inserted in the container through the opening, said pipette extending along an axis and having a first dispensing end and a second opposite end; a plug removably assembled to the dispensing end of the pipette, said assembled pipette and plug defining an inner compartment for temporarily storing a second fluid composition isolated from the first fluid composition; and a pressure supply device comprising: a support assembled to the second end of the pipette, a compressible chamber in fluid communication with the second end of the pipette; and a first pressure member able to move relative to the support, between a first and a second configurations, so as to lessen a volume of the compressible chamber, thereby increasing a pressure in the inner compartment. 
     The term “cosmetic product” is understood to mean a product as defined in Council Directive 1223/2009/EEC of 30 Nov. 2009. 
     Due to chemical reactions occurring in cosmetic compositions, it may be useful to provide a cosmetic product in the form of at least two distinct compositions which are mixed within a short time before use. Therefore, it is possible to manufacture and store the compositions separately, without degradation of the active components. 
     In such cases, it is advantageous to provide a packaging and dispensing device allowing an easy mixing of the at least two distinct compositions before application. 
     A packaging and dispensing device for dual content, as described above, is known from document WO2015/034165. This document describes a cosmetic container having dual contents and comprising a container body in which a first product is stored and a pipette assembly forming a storage space in which a second product is stored. 
     The pipette assembly is temporarily closed by a plug that is removed when the user draws the pipette out of the container for the first time. 
     After removal of the plug, the product can be released into the container where it mixes with the first product as with a regular pipette by increasing the pressure in the pipette through a piston or a compressible bellow. 
     After releasing and mixing of the second product, the pipette assembly can be used normally to withdraw and dispense a quantity of the mixed composition from the container. 
     However, the packaging and dispensing device of document WO2015/034165 involves many different parts; moreover, the pressure for pushing the second product out of the pipette is relatively low and moderate and consequently the mixing of the two products is not optimum and it may results in a less homogeneous final product. 
     An object of the present invention is to provide a packaging and dispensing device for dual content, with a simplified manufacturing and using process. In particular, an object of the present invention is to allow a more efficient mixing of the two products. 
     To this end, the invention relates to a packaging and dispensing device as described above, wherein the pressure supply device comprises locking elements for maintaining the first pressure member in the second configuration with an increased pressure in the inner compartment. 
     According to advantageous embodiments, the packaging and dispensing device comprises one or more of the following feature(s), taken in isolation or according to any technically possible combination:
         the locking elements in the second configuration are able to oppose a force exerted along the axis of the pipette;   the locking elements allow the support and first pressure member to snap-fit into the second configuration;   the locking elements comprise a male pin and a female L-shaped slot forming a bayonet-type assembly;   the pressure supply device also comprises a second pressure member able to move relative to the first pressure member and/or relative to the support, to reversibly modify a volume of the compressible chamber so as to allow pipetting of a quantity of product from the container and subsequent dispensing of said quantity of product;   the compressible chamber is defined by a membrane in the shape of a compressible bellows;   the packaging and dispensing device comprises closing elements, such as complementary threads, for reversibly assembling the pipette and the opening of the container, and the plug is coupled to the container so as to prevent said plug to be ejected from the dispensing end of the pipette by an overpressure in the inner compartment, when the pipette and opening are assembled; preferably, the plug is fixed to the container or slidably coupled to a lateral wall of the container;   the packaging and dispensing device comprises a stopper movable between a first airtight position and a second position, closer to the dispensing end of the pipette, wherein the stopper in the first airtight position isolates the inner compartment from the compressible chamber, and wherein the stopper in the second position allows fluid communication between the inner compartment and the compressible chamber ( 93 ), said stopper being configured to move from the first airtight position to the second position upon displacement of the first pressure member from its first towards its second configuration; preferably, the stopper comprises a displacement rod;   the container contains a first fluid composition and the inner compartment contains a second fluid composition, at least one of the first and second fluid compositions being preferably a liquid composition.       

     The invention also relates to a pressure supply device for the manufacturing of a packaging and dispensing device as described above, said pressure supply device comprising: a support able to be assembled to a pipette; a compressible chamber able to be in fluid communication with a pipette assembled to the support; and a pressure member able to move relative to the support, between a first and a second configurations, so as to lessen a volume of the compressible chamber; the pressure supply device comprising locking elements for maintaining the pressure member in the second configuration with a higher pressure in the compressible chamber than outside said compressible chamber. 
     The invention also relates to a method for using a packaging and dispensing device as described above, said method comprising: moving the first pressure member of the pressure supply device relative to the support, from the first to the second configurations, thereby increasing a pressure in the inner compartment; and removing the plug from the first axial end of the pipette, said increased pressure thereby allowing the second fluid composition to exit the pipette and to get mixed with the first fluid composition. 
    
    
     
       The invention will be better understood upon reading of the following description, taken solely as an example and made in reference to the following drawings, in which: 
         FIG. 1  is a cross-section view of a packaging and dispensing device according to a first embodiment of the invention in a configuration. 
         FIG. 2  is a cross-section view of a packaging and dispensing device according to a second embodiment of the invention; 
         FIG. 3  is a cross-section view of a filling assembly for the manufacturing of the packaging and dispensing device of  FIG. 1 ; 
         FIG. 4  is a cross-section view of a pressure supply device for the manufacturing of a packaging and dispensing device according to a first embodiment of the invention; 
         FIG. 5  is an upper view of an element of the filling assembly of  FIG. 3 ; 
         FIG. 6  is an upper view of an element of the packaging and dispensing device of  FIG. 2 ; and 
         FIG. 7  is a schematic, detail cross-section view of a packaging and dispensing device according to a third embodiment of the invention. 
         FIG. 8  is a cross-section view of a packaging and dispensing device of  FIG. 1 , in another configuration; and 
         FIG. 9  is a detail cross-section view of a packaging and dispensing device of  FIG. 1 , a third configuration. 
     
    
    
       FIG. 1  shows a cosmetic packaging and dispensing device  10  according to a first embodiment of the invention.  FIGS. 3 and 4  respectively show a filling assembly  12  and a pressure supply device  13 , for the manufacturing of the packaging and dispensing device  10 . A manufacturing process will be described below. 
       FIG. 2  shows a cosmetic packaging and dispensing device  210  according to a second embodiment of the invention.  FIG. 7  is a detail, schematic representation of a cosmetic packaging and dispensing device  310  according to a third embodiment of the invention. In the following description, the common elements of the devices  10 ,  210  and  310  are designed by the same reference numbers. 
     The cosmetic packaging and dispensing devices  210  and  310  are manufactured from filling assemblies (not shown) similar to the assembly  12 , and from the pressure supply device  13  or a similar pressure supply device  213 , according to the manufacturing process described below. 
     The cosmetic packaging and dispensing device  10 ,  210 ,  310  and the filling assembly  12  comprise a container  14 ,  214 ,  314 . The cosmetic packaging and dispensing device  10 ,  210 ,  310  also comprise a closure member  16 ,  216  able to be reversibly assembled to the container  14 ,  214 ,  314 . An assembled conformation of the container  14 ,  214 ,  314  and closure member  16 ,  216  is shown on  FIGS. 1, 2 and 7 . Only a lower part of the container  314  and closure member  16  are shown on  FIG. 7 . 
     The filling assembly  12  and the pressure supply device  13  of  FIGS. 3 and 4  comprise elements for the manufacturing of the closure member  16 ; said elements will be described below. 
     The cosmetic packaging and dispensing device  10 ,  210 ,  310  and the filling assembly  12  also comprise a plugging device  18 ,  218 ,  318  assembled to the container  14 ,  214 ,  314 . The plugging device  18 ,  218 ,  318  will be described below. 
       FIG. 8  shows the embodiment of  FIG. 1  in a first configuration, with a first volume of the compressible chamber.  FIG. 1  shows the compressible chamber in a second configuration, with a second, lesser volume. Therefore,  FIGS. 1 and 8  show a single embodiment in which a first pressure member (is) able to move relative to the support, between a first and a second configurations, so as to lessen a volume of the compressible chamber, thereby increasing a pressure in the inner compartment. 
       FIG. 9  shows the embodiment of  FIG. 1  in a third configuration, wherein the first and second fluid compositions are mixed into a cosmetic product  300 . Therefore,  FIGS. 1 and 9  show a single embodiment with an inner compartment for temporarily storing a second fluid composition isolated from the first fluid composition. 
     The container  14 ,  214  will be described below. Unless specified otherwise, the description also applies to the container  314  of  FIG. 7 . 
     The container  14 ,  214  mainly extends along a first longitudinal axis  20 , considered vertical. In the following description, the terms “upper”, “lower”, “upwards”, “ ” downwards”, will be understood with respect to said vertical axis  20 , considering that the dispensing devices  10  and  210  are in the assembled conformation displayed on  FIGS. 1 and 2 . 
     A first axial end of the container  14 ,  214  is formed by an upper opening  22 . Adjacent to the first axial end, the container  14 ,  214  comprises a neck  24  axially extending from a shoulder  26  to an upper edge  28 , said upper edge defining the upper opening  22 . 
     Preferably, the neck  24  has a mainly cylindrical shape. More preferably, an external surface of the neck  24  comprises an assembling element  30 , such as threads, for assembling the neck  24  with the closure member  16 . 
     The container  14 ,  214  also comprises a lateral wall  32  extending downwards from the shoulder  26 . A second axial end of the container  14 ,  214  is formed by a bottom  34 ,  234 . 
     In the embodiments of  FIGS. 1, 2 and 3 , the bottom  34 ,  234  is fixed to the lateral wall  32 . 
     More precisely, in the embodiment of  FIGS. 1 and 3 , the bottom  34  of the container  14  is snap-fitted to the lateral wall  32 . In the embodiment of  FIG. 2 , the bottom  234  of the container  214  is made one-piece with the lateral wall  32 . This allows for making the container  214  out of glass for example. 
     In the embodiment of  FIG. 7 , the container  314  comprises a bottom  334  movably coupled with the lateral wall  32 . Said bottom  334  will be described below. 
     The container  14 ,  214  defines a storing volume  36 . Said storing volume  36  is filled with a first fluid composition  38 , shown on  FIG. 1 . 
     The term “fluid composition” is preferably understood as “liquid composition” but may also include some solid compositions such as powders. 
     The closure member  16 ,  216  comprises the pressure supply device  13 ,  213  and a pipette member  50 . In the devices  10 ,  210  of  FIGS. 1 and 2 , the pressure supply device  13 ,  213  and the pipette member  50  are connected to each other. The filling assembly  12  of  FIG. 3  comprises a pipette member  50  unconnected to the pressure supply device  13 . 
     The filling assembly  12  of  FIG. 3  is formed by the pipette member  50  assembled to the container  14  and to the plugging device  18 .  FIG. 5  is an upper view of the pipette member  50 . 
     In the embodiments of  FIGS. 1, 2, 3 and 5 , the pipette member  50  comprises a pipette  54  and a holding element  56 . The pipette  54  is tubular and extends along a second axis  60 . On  FIGS. 1, 2 and 3 , the pipette  54  is received inside the container  14 ,  214  and the first  20  and second  60  axes are coincident. 
     An upper end  62  of the pipette  54  is designed to be connected to the pressure supply device  13 ,  213 . Preferably, the upper end  62  comprises a bulb edge to allow a snap-fit assembly with said pressure supply device  13 ,  213 , as described below. 
     A lower end of the pipette  54  comprises an axial opening  66 . Said lower end forms a dispensing end of pipette  54 . Preferably, a section of the pipette constricts around the axial opening  66 , in order to limit a liquid flow under gravity. 
     In the embodiments of  FIGS. 1, 2, 3 and 5 , the holding element  56  is a flange fixed to the pipette  54  near the upper end  62 . The flange  56  is mainly washer-shaped and extends in a plane perpendicular to the second axis  60 . 
     The flange  56  is configured to be in contact with the upper edge  28  of the neck  24  when the pipette  54  is received inside the container  14 ,  214 . Preferably, the flange  56  is able to rest on the upper edge  28 . More preferably, the upper edge  28  comprises a groove  68  forming a seat able to fit around the flange  56 , so that radial movements of said flange are prevented when in contact with said seat. 
     The flange  56  comprises at least a first off-centered through hole  70 . As shown on  FIGS. 3 and 5 , the off-centered through hole  70  is configured to be radially situated between the pipette  54  and the upper edge  28  of the neck  24  when the pipette  54  is received inside the container  14 ,  214 . As described below, a diameter of the first off-centered through hole  70  is preferably sufficient to allow the insertion of an injection needle or nozzle. 
     Preferably, the flange  56  also comprises a second off-centered through hole  72 , also configured to be radially situated between the pipette  54  and the upper edge  28  of the neck  24  when the pipette  54  is received inside the container  14 ,  214 . Preferably, the second off-centered through hole  72  is of a diameter significantly smaller than the first off-centered through hole  70 . 
     The second through hole  72  acts as a venting hole for letting out the air present in the container when filing through the aperture—in this embodiment, the first through hole  70 . 
     In the embodiment of  FIGS. 3 and 5 , the first  70  and second  72  through-holes are distant from a peripheral edge  73  of the flange  56 . In an alternative embodiment, the first  70  and/or second  72  through-hole(s) can be made as cut open on the peripheral edge  73 , forming one or more notches in the flange  56 . 
     According to a first embodiment, the pipette  54  and the flange  56  are made one-piece, for example of a thermoplastic material. 
     According to a second embodiment, the pipette  54  and the flange  56  are made of different materials and the flange is inserted around the pipette. For example, the pipette  54  is made of glass and the flange  56  is made of an elastomeric material. 
     According to another embodiment (not shown), the holding element  56  has a different shape; for example, the holding element comprises a plurality of linear elements or spokes radially extending from the pipette  54 , said linear elements being spaced from each other. 
     According to another embodiment (not shown), the holding element  56  is fixed to an inside of the neck  24  or lateral wall  32  of the container  14 ,  214 ; said holding element is able to be removably assembled to the pipette  54 . For example, the holding element comprises a central opening for inserting the pipette  54  when assembling said pipette with said container, so as to maintain the first  20  and second  60  axes coincident. 
       FIG. 4  shows the pressure supply device  13  in an unconnected configuration. The pressure supply device  13  substantially has a cylindrical external shape, extending along a third axis  80 . 
     On  FIGS. 1 and 2 , the pipette member  50  and the pressure supply device  13 ,  213  are connected to each other to form the closure member  16 ,  216 ; the second  60  and third  80  axes are coincident. In the following description, the third axis  80  is considered vertical. 
     In the embodiments of  FIGS. 1, 2 and 4 , the pressure supply device  13 ,  213  is able to apply a variable pressure in the pipette  54 . The pressure supply device  13 ,  213  may be in a first configuration, shown on  FIGS. 2 and 4 , or in a second configuration, shown on  FIG. 1 . 
     The pressure supply device  13 ,  213  comprises: a cap  82 , a push-button  84 , a spring membrane  85  and a connecting element  86 . 
     The cap  82  has a substantially tubular shape extending along the third axis  80 . The cap  82  comprises a first  90  and a second  92  inner rings, radially protruding from a cylindrical inner wall of the cap  82 . The first  90  and second  92  inner rings both comprise a chamfer oriented downwards. 
     According to an embodiment, the first  90  and/or second  92  inner rings are continuous; according to another embodiment, the first  90  and/or second  92  inner rings are discontinuous, that is to say formed by curved segments separated by spaces. 
     The push-button  84  obstructs an upper end of the cap  82 . Said push-button  84  is translatable relative to said cap  82  along the third axis  80 . 
     The spring membrane  85  is received in the cap  82 , in contact with the push-button  84 . The spring membrane  85  defines a compressible chamber  93  of a variable volume. In the embodiments of  FIGS. 1, 2 and 4 , the spring membrane  85  has the shape of a bellows, with a single opening  95 . 
     The spring membrane  85  is able to be compressed along the first axis  80 . In the second configuration of the pressure supply device  13 , shown on  FIG. 1 , the spring membrane  85  is more compressed than in the first configuration, shown on  FIGS. 2 and 4 . However, even in the first configuration, the spring membrane  85  is in a semi-compressed state and tends to push the push-button  84  upwards. 
     The amplitude of movement of the push-button  84  relative to the cap  82  is able to reversibly modify the volume of the compressible chamber  93 , to a lesser degree than the difference between the first and second configurations. 
     The connecting element  86  has a substantially tubular lateral wall extending along the third axis  80 . The connecting element  86  comprise an inner transversal wall  94  separating said connecting element  86  into a lower  96  and an upper  98  compartments. Said lower  96  and upper  98  compartments communicate through a central hole  100  in the inner transversal wall  94 . 
     The lower compartment  96  is able to be assembled to the neck  24  of the container  14 ,  214 . More specifically, the lower compartment  96  comprises internal threads  102  able to cooperate with the threads  30  of the neck  24 . 
     On the side of the lower compartment  96 , the inner transversal wall  94  preferably comprises a sealing device  104 , such as a gasket or sealing joint, to ensure a tight connection between the container  14 ,  214  and closure member  16 . 
     On the side of the lower compartment  96 , the inner transversal wall  94  is designed to be assembled to the pipette member  50 . More specifically, the upper end  62  of the pipette  54  is able to be snap-fitted to the inner transversal wall  94 , around the central hole  100 . 
     On the side of the upper compartment  98 , the inner transversal wall  94  is assembled to the opening  95  of the spring membrane  85 . In the unconnected configuration of  FIG. 4 , the compressible chamber  93  communicates with the lower compartment  96  through the central hole  100 . In the devices  10 ,  210  of  FIGS. 1 and 2 , the compressible chamber  93  is connected to the pipette  54  and is able to modify a pressure inside said pipette. 
     An upper end of the upper compartment  98  comprises an outer ring  106 , radially protruding from the lateral wall of the connecting element  86 . Said outer ring  106  comprises a chamfer oriented upwards. Said outer ring  106  may be continuous or discontinuous, as defined above. 
     The connecting element  86  is slidably inserted into a lower end of the cap  82 . In the first configuration of  FIGS. 2 and 4 , the spring force of the spring membrane  85  maintains the outer ring  106  of the connecting element  86  in contact with the first inner ring  90  of the cap  82 . In the second configuration of  FIG. 1 , the spring force maintains the outer ring  106  in contact with the second inner ring  92  of the cap  82 . In both cases, the chamfer-less sides of the inner and outer rings are in contact with each other. In the embodiments of  FIGS. 1, 2 and 4 , as described below, the cap  82  is able to translate relative to the connecting element  86  along the first axis  80 , from the first to the second configuration. The snap-fitting of the outer ring  106  with the second inner ring  92  irreversibly places the pressure supply device  13 ,  213  into the second configuration. 
     According to another embodiment (not shown), in place of the outer ring  106  and second inner ring  92 , the cap  82  and connecting element  86  comprise locking elements able to reversibly maintain the pressure supply device in the second configuration. For example, these locking elements comprise a male pin and a female L-shaped slot forming a bayonet-type assembly. 
     The pressure supply device  213  of  FIG. 2  only differs from the pressure supply device  13  of  FIGS. 1 and 4  in that it also comprises a stopping member  107 . Said stopping member  107  is received in the connecting element  86  and the spring membrane  85 . The stopping member  107  comprises a stopper  108  and a rod  109 . 
     When the pressure supply device  213  is in the first configuration of  FIG. 2 , the stopper  108  is tightly inserted in the central hole  100  of the connecting element  86 . The stopper  108  has a smaller diameter than the pipette  54 . 
     The rod  109  extends upwards from the stopper  108  in the compressible chamber  93 . The rod  109  has a smaller radial dimension than the stopper  108 . 
     When the pressure supply device  213  is in the first configuration, the stopper  108  isolates the spring membrane  85  and compressible chamber  93  from the contents of the pipette  54 . When the cap  82  moves towards the second configuration, the rod  109  is pushed downwards by an upper end of the spring membrane  85 . Therefore, the stopper  108  is released in the pipette  54 , allowing fluid communication between said pipette and the compressible chamber  93 . 
     The plugging device  18 ,  218 ,  318  comprises a plug  110  received in the container  14 ,  214 ,  314 , near the bottom  34 ,  234 ,  334 . The plug is preferably made of a deformable material. The plug  110  is preferably situated on the first axis  20 . 
     In the assembled conformation of  FIGS. 1, 2, 3 and 7 , the plug  110  is inserted in the axial opening  66  of the pipette  54  so as to obstruct said axial opening  66 . Therefore, in the assembled conformation of  FIGS. 1, 2, 3 and 7 , the pipette  54  and plug  110  define an inner compartment  112 , isolated from the storing volume  36  of the container  14 ,  214 ,  314 . Said inner compartment  112  is filled with a second fluid composition  114 , shown on  FIG. 1 . 
     Preferably, the second fluid composition  114  is a liquid composition but may also be a powdery solid. According to a preferred embodiment, at least one of the first  38  and second  114  fluid compositions is a liquid composition. 
     The plug  110  is coupled to the container  14 ,  214 ,  314 . As explained below, said coupling is able to prevent the plug to be ejected from the axial opening  66  of the pipette by an overpressure in the inner compartment  112 , when the container and closing element  16  are assembled. 
     According to the embodiments of  FIGS. 1, 2 and 3 , the plug  110  is fixed to the container  14 ,  214 . According to the embodiment of  FIG. 7 , the plug  110  is movable relative to the container  314 . 
     In the embodiment of  FIGS. 1 and 3 , the plug  110  protrudes upwards from the bottom  34  of the container  14 , said plug and bottom being preferably one-piece. The plugging device  18  also comprises a continuous or discontinuous ring  115 , protruding upwards from the bottom  334  around the plug  110 . As shown on  FIGS. 1 and 3 , when the axial opening  66  of the pipette  54  is assembled to the plug  110 , the lower end of said pipette is inserted in the ring  115 , strengthening the assembly. 
       FIG. 6  is an upper view of the plugging device  218  according to the embodiment of  FIG. 2 . 
     The plugging device  218  comprises a coupling member  120 , attached to the plug  110  and preferably made one-piece with said plug. The coupling member  120  comprises an upper ring  122 , attached to the neck  24  of the container  214 . The upper ring  122  comprises a groove  68  forming a seat able to fit around the flange  56  of the pipette member  50 , to prevent radial movements of said flange. 
     The coupling member  120  also comprises a U-shaped band  124  extending downwards from the upper ring  122 . The plug  110  protrudes upwards from a lowest bend of the U-shaped band  124 . 
     The U-shape band  124  comprises lateral surfaces that can be used for decorating purpose, for example for having a logo or drawing represented on at least one of said lateral surfaces. The lateral surfaces can be of the same width or of different widths. The drawing or logo can be viewed through a transparent container  214  and through a transparent formula as the first fluid composition  38 . The container and formula may have an impact on the optical path and consequently have an optical effect (or lens effect) on how the drawing can look. 
     Preferably, in the embodiment of  FIG. 2 , the plug  110  is not in contact with the bottom  234  of the container  214 . Therefore, said bottom  234  needs not be as precisely shaped as a bottom designed to be attached to the plug, such as in the embodiment of  FIGS. 1 and 3 . 
     In the embodiment of  FIG. 7 , the plugging device  318  comprises a piston  130  able to slide inside the lateral wall  32  of the container  314 . The piston  130  is attached to the plug  110  and extends radially around said plug  110 . Preferably, the piston  130  is made one-piece with the plug  110 . 
     The piston  130  is coupled to the bottom  334  of the container  314 . More specifically, the piston  130  is helically coupled to the bottom  334 , by means of threads  132 , whereas the bottom  334  is rotatable relative to the lateral wall  32 . Therefore a rotation of the bottom  334  relative to the lateral wall  32  is converted into a translation of the piston  130  relative to said lateral wall. 
     According to an embodiment, the plugging device  18 ,  218 ,  318  comprises flow deflectors able to modulate the shape of a flow of second fluid composition  114  into the first fluid composition  38  when the plug  110  is removed from the axial end of the pipette. For example, in the embodiment of  FIGS. 1 and 3 , the ring  115  extends higher than the plug  110  and comprises vertical slots  140  able to separate a flow of second fluid composition  114 , for aesthetic purpose. 
     A method for the manufacturing of the filling assembly  12  of  FIG. 3  will now be described. The bottom  34  and plugging device  18  of  FIGS. 1 and 3  are made one-piece, then snap-fitted to the lateral wall  32  to form the container  14 . In a similar manner, the container  214  and plugging device  218  of  FIG. 2  are assembled. In a similar manner, the container  314  and plugging device  318  of  FIG. 7  are made separately and assembled. 
     Besides, the pipette  54  and holding element  56  of the pipette member  50  are made one-piece, or are made separately and assembled. 
     Then, the pipette  54  is introduced into the container  14 ,  214 ,  314  and the plug  110  is inserted into the axial opening  66 , thereby forming the isolated inner compartment  112 . The flange  56  is put into contact with the upper edge  28  of the neck  24 . Preferably, the flange  56  is received into the groove  68  and radially blocked. 
     The filling assembly  12  is then in the configuration shown on  FIG. 3 . The upper opening  22  of the container  14 ,  214 ,  314  is partially obstructed by the flange  56 ; the storing volume  36  communicates with the outside of the container  14 ,  214 ,  314  through the first  70 , and preferably second  72 , off-centered through holes of said flange  56 . 
     A method for the manufacturing of the pressure supply device  13 ,  213  will now be described. The cap  82 , push-button  84 , spring membrane  85  and connecting element  86  are made separately. The cap  82  is assembled with the push-button  84  and the spring membrane  85  is snap-fitted to the inner transversal wall  94  of the connecting element  86 . In the case of the pressure supply device  213 , the stopping member  107  is inserted into the spring membrane  85  and central hole  100 . 
     Then, the lower end of the cap  82  is inserted around the spring membrane  85  and connecting element  86 , by translation along the third axis  80 . The push-button  84  comes into contact with, and partially compresses the spring membrane  85 . The outer ring  106  of the connecting element  86  comes into contact with the first inner ring  90  of the cap  82 , on the chamfered sides. As the translation movement is continued, said outer ring  106  and first inner ring  90  snap-fit with each other; the pressure supply device  13 ,  213  is thereby assembled. 
     A method for the manufacturing of the devices  10  and  210 , starting from the filling assembly  12  or a similar assembly, will now be described. The following method may be used for the manufacturing of device  310 . 
     The inner compartment  112  is filled with the second fluid composition  114 , through the open upper end  62  of the pipette  54 . Then, the storing volume  36  of the container  14 ,  214  is filled with the first fluid composition  38 , through the first off-centered through hole  70 . 
     Preferably, the filling of the storing volume  36  is carried out by an injection needle or nozzle inserted into the first off-centered through hole  70 . Preferably, the second off-centered through hole  72  serves as an air-release valve during the filling of the storing volume  36 , allowing a quick, and preferably automated, process. 
     After the filling of the inner compartment  112  and storing volume  36 , the lower compartment  96  of the pressure supply device  13 ,  213  is screwed onto the neck  24  of the container  14 ,  214 . During the screwing process, the upper end  62  of the pipette  54  snap-fits with the inner transversal wall  94  of the connecting element  86 . Said upper end  62  is therefore closed by the spring membrane  85 . In the same manner, the first  70  and second  72  off-centered holes are closed by contact with the inner transversal wall  94  or with the sealing joint  104 . 
     In the cases where the flange  56  is made of a suitable material, such as an elastomer, the screwing of the lower compartment  96  onto the neck  24  compresses said flange with a tightness effect. In such embodiments, the sealing joint  104  may be suppressed if the shape of the inner transversal wall  94  allows the closing of the first  70  and second  72  off-centered holes. 
     The pipette member  50  and the pressure supply device  13 ,  213  are thereby assembled, forming the closure member  16 ,  216 . In the same manner, said closure member  16 ,  216  is assembled with the container  14 ,  214 , forming the device  10 ,  210  in an assembled conformation. The pressure supply device  13 ,  213  is in the first configuration of  FIG. 2 . 
     Preferably, the device  10 ,  210  is marketed in said assembled conformation/first configuration, the first  38  and second  114  fluid compositions being isolated from each other. In the case of the device  210 , the stopper  108  of the pressure supply device  213  also prevents the second fluid composition  114  from being spilled inside the compressible chamber  93  during transport and storage. 
     The number of different parts in the device  10 ,  210  is much lower than the number of parts in the devices of the state of the art. In the same manner, the manufacturing method described above is easy to carry out, even as an automated process. 
     A method for the use of the devices  10  and  210  will now be described. Starting from the assembled conformation/first configuration described above, a user pushes the cap  82  and push-button  84  downwards, relative to the connecting element  86  and to the rest of the device  10 ,  210 . In the case of the pressure supply device  213 , the rod  109  of the stopping member  107  is pushed downwards and the stopper  108  is released in the pipette  54 , allowing fluid communication between said pipette and the spring membrane  85 . The cap  82  translates until the second inner ring  92  snap-fits with the outer ring  106  of the connecting element  86 , in a similar manner as described above for the first inner ring  90 . 
     The pressure supply device  13 ,  213  is then maintained in the second configuration of  FIG. 1 , with a compressed spring membrane  85 . The volume of the compressible chamber  93  is reduced, thereby increasing the pressure in the inner compartment  112 , in comparison with the first configuration. 
     The device allows the application of a significant pressure in the inner compartment  112 , while maintaining the pressure supply device  13 ,  213  in the second configuration and the plug  110  in the axial opening  66  of the pipette  54 . 
     The user then unscrews the closing member  16 ,  216  from the container  14 ,  214 . The axial opening  66  of the pipette  54  is separated from the plug  110 . The pressure pushes the second fluid composition  114  out of the pipette  54  into the storing volume  36 , allowing an efficient mixing with the first fluid composition  38 . 
     Optionally, the shape of the flow of second fluid composition  114  is modulated by the flow deflectors  140  of the plugging device  18 ,  218 . In function of the respective viscosities of the first  38  and second  114  fluid compositions, different visual effects may be obtained during the mixing. 
     A ready-to-use cosmetic product is thereby obtained. Then, the user can activate the push-button  84  to suck up application doses of the cosmetic product into the pipette  54 , by means of the volume variation of the spring membrane  85 . 
     According to the embodiment of  FIG. 7 , the plug  110  may be pulled out of the axial opening  66  without separating the container  314  and closing member  16 . For example, the user rotates the bottom  334  relative to the lateral wall  32  of the container  314 , thereby moving the piston  130  downwards, that is to say opposite to the neck  24 . As a consequence, the plug  110  is extracted from the pipette  54 . In the meantime, the pressure decreases in the storing volume  36 . Due to the difference of pressure between the pipette  54  and the storing volume  36 , the second fluid composition  114  exits the pipette  54  and efficiently mixes with the first fluid composition  38 .