FR2871346A1 - Conditioning assembly for e.g. mascara, has packaging device including applicator and container containing cosmetic product, and outer enclosure, where enclosure and container are subjected to radiation emitted by micro-wave oven - Google Patents

Abstract

The assembly has a packaging device including an applicator and a container (41) containing a cosmetic product, and an outer enclosure (40) containing the container of the packaging device. The outer enclosure and the container are subjected to a radiation emitted by a micro-wave oven. The melting temperature of walls of the outer enclosure is greater than the melting temperature of the container. An independent claim is also included for a process for application of cosmetic product.

Description

The present invention relates to the methods of makeup and application

  a care product and kits used in the implementation of such methods.

  It has been proposed to apply cosmetics after raising their temperature. Thus, US Pat. No. 5,775,344 describes a device for packaging and applying mascara comprising a heating resistor integrated in the container.

  The invention, according to a first of its aspects among others, relates to a process for the application of a cosmetic product, including care product, excluding depilatory waxes, this product being contained in a container of a packaging device, the method comprising the following steps: placing the container in an external enclosure, closing the external enclosure, placing the external enclosure in a microwave oven in order to raise the temperature of the product by subjecting it to microwave radiation inside the oven, - open the external enclosure, - apply the product by means of an applicator.

  The invention also relates to a kit comprising a packaging device and an external enclosure, the packaging device comprising an applicator and a container containing a cosmetic product, and the external enclosure being able to contain at least the container of the device of conditioning, at least the outer enclosure and said container being capable of being subjected to radiation emitted by a microwave oven.

  Microwave ovens are conventional ovens, which can also be used for heating food, having an enclosure within which an object to be heated can be exposed to electromagnetic energy.

  The product can thus be quickly and uniformly brought to a desired temperature without having to incorporate into the conditioning device a heating resistor. Indeed, the product preferably contains water or any other substance absorbing the radiation emitted by the microwave ovens, and heating up under the action of microwaves.

  Due to the heating of the product and the air respectively contained inside the container, an increase in the internal pressure of the conditioning device may occur. If this increase in pressure leads to a bursting of the walls of the container or to a product overflow at a vent formed between the container and a closure member of this container, then thanks to the ingenious process of the invention, the spillage of the product out of its conditioning device is limited inside the outer enclosure, and the oven is not soiled.

  The rise in temperature of the product contributes to the progressive warming of the walls of the container which are in contact with it. In fact, the outer enclosure prevents the user from directly manipulating the walls of the container heated by the product. This external enclosure allows indirect handling of the conditioning device, which may be possibly too hot, deteriorated or dirty as explained above.

  In addition, the user can seize the external enclosure in his hands, possibly with a protective glove and out of the oven without danger of burning himself. Indeed, the walls of the outer enclosure are not in direct contact with the product and therefore heat slowly or not at all. The oven is then cleared and available for all other needs, and its cleanliness has not been altered by the heating operation of the cosmetic product conditioning device.

  Preferably, the melting temperature of the walls of the outer enclosure is greater than the melting temperature of the container. Thus, even if the container melts under the effect of heating in a microwave oven, the outer enclosure allows to retain the melted mixture so as not to dirty the oven.

  Advantageously, the outer enclosure has a burst resistance by internal overpressure greater than that of the container of the packaging device. Thus, even if the container explodes, the outer enclosure keeps closed the interior space in which is disposed said container. Thus even if the packaging device would burst under the effect of heating in a microwave oven, the exploded device remains in the interior space defined by the outer enclosure, and does not come dirty the oven.

  The heating of the product may aim for example to promote its spreading, or its holding on an area to be coated, for example eyelashes, hair, skin or mucous membranes, or improve the setting of the hair. In particular the heating of the product can improve its dermatological properties, and or improve its effects lengthening, curling, shine, matting, softness, and or anti-wrinkles. This heating may be of interest in the context of aromatherapy, to promote the effects of aromas and essential oils applied. The application of a hot cosmetic product can also simulate a sauna or steam effect on the skin as part of a topical application. It can promote the penetration of an asset of this product into the skin, mucous membranes or keratinous fibers and have a local action on the blood circulation for example.

  For example, the product can provide at least two types of effects depending on the temperature at which it is used. Advantageously, the product has properties that allow an application on the one hand hot and on the other hand cold, especially at room temperature. One can choose between an application of the cold product for a first type of care and or make-up and application of the hot product, after heating with microwaves, for a second type of care and or make-up. This can enable the user to best adapt the properties of a product to the type of application or makeup, or desired care. For example, an application of the hot product makes it possible to spread it on a thinner layer to obtain a less covering makeup, and an application of this same product at room temperature allows a mattifying makeup.

  The rheological properties of the product may be modified by temperature, including viscosity, surface tension, structural composition, and thixotropy, as appropriate. The heating can then facilitate the taking of the product. Especially in the case where the product contains elongated particles such as fibers, the microwave heating of such a product then improves the application and or makeup obtained.

  For example, in the case of extemporaneous preparations comprising at least two components, for example two liquids or a powder and a liquid, for example extemporaneous hair preparations, the heating may accelerate the mixing of the components and / or the dissolution of a component In another.

  The heating may also allow to re-liquefy the product having dried on the walls of the container, and to pour it into the bottom of this container to facilitate its emptying.

  By means of this microwave heating, it is possible to obtain a bacterial purification, or even a pasteurization, of the product contained in the container. This pasteurization can be performed several times during the life of the product. This heating makes it possible to envisage product formulations containing fewer preservatives.

  The product can be heated in the microwave oven so that its temperature is between 30 ° C. and 80 ° C., for example.

  The duration during which the product is exposed to microwave radiation may be for example between 1 and 60 seconds, better between 2 and 50 seconds, even between 3 and 25 seconds, and being for example close to 7 seconds. The heating of the product can be divided into several heating stages interspersed with breaks. These breaks possibly allow the user to ensure control of the temperature reached by the product.

  A preferred heating time is in particular established according to the power of the oven, the nature of the container, the starting temperature and the temperature to be reached, the amount and nature of the product. For this purpose, the kit may include a sign informing the user about the possibility of heating it in a microwave oven. The method can be implemented one or more times, depending on whether the kit is single use or not.

  The external enclosure may in particular include a mark indicating the user the position in which it should be preferentially placed in the microwave oven. Preferably, the outer enclosure has at least one wall arranged to allow to lay it stably on a flat surface.

  The kit may for example be arranged such that the height of product in the container is lower in a heating position than in a normal use position of this container. The heating position may for example be a prone position of the conditioning device in its outer enclosure to account for the horizontal distribution of a microwave field in the oven cavity.

  Alternatively, the heating position may be an elevated position, for example obtained by means of a booster presented by the outer enclosure, so that the conditioning device is subjected to maximum radiation being placed in a more central area the volume of the oven. This booster is able to place the conditioning device higher relative to a plane on which the external speaker is placed, than if it had been directly placed on this plane.

  In the case of containers provided with an applicator nozzle, in particular made of foam, or a wiper, these containers are preferably arranged in such a way that their application nozzle and / or their wiper are respectively heated by contact with the product heated to the core under the effect of the radiation of microwaves. The container is placed closed, "upside down" inside the outer enclosure and inside the microwave oven.

  The container may comprise a wall arranged to allow it to be stably laid in a lying down position, for example a wall having a prismatic cross section providing at least one flat surface, rather than a circular cross section.

  For example, the applicator is previously detached from the container, and the container alone containing the product is placed in the outer enclosure to be subjected to microwave radiation. In this case, the applicator may be placed in a holder while the container is subjected to microwave radiation. For example, this support is intended to be fixed on the packaging device in a storage position, outside the heating period of the container. On the other hand, the applicator may also, where this is possible, be placed inside the outer enclosure, preferably mounted on the container, to be placed in the microwave oven in order to subject to such radiation for example to increase the temperature of the applicator surface, and in particular at its application surface. For example, its application surface is heated by direct contact with the product.

  This applicator is preferably integral with a closure member for closing the container. The applicator may be made by molding in one piece with the closure member, or may be attached and retained by overmolding or gluing.

  Since the kit is arranged to allow the product to be heated in a microwave oven, it is advantageously free of metal, for example a metal part or metallized or electrically conductive coating, preferably being made only with materials compatible with a use. in a microwave oven.

  Advantageously, the conditioning device and / or the external enclosure are permeable to microwaves, and thus allow a conservation of the heat of the product during use as thermal insulation, and or offer a less gripping surface hot than the temperature of the product contained in the container. After heating in the microwave oven, the outside temperature of the container is lower than the temperature of the product, the temperature of the outer enclosure being itself lower than the temperature of the container. Indeed, this external enclosure is preferably made of a material with a high thermal resistance when it is subjected to electromagnetic radiation, and preferably having a thermal resistance greater than that of the container, itself greater than the thermal resistance of the product. .

  Preferably the kit comprises an indicator arranged to deliver information relating to the temperature, and at best relative to the temperature of the product. Preferably, the conditioning device is taken out of its external enclosure, as a function of a reading of this temperature-sensitive indicator, preferably the indicator being visible through the external enclosure, or from a part or an opening of this external enclosure.

  The indicator used may in particular allow to warn the user when the temperature of the product is greater than at least one predefined value. This indicator may be integral with the container containing the product. In cases where the packaging device comprises a closure member of the container, the indicator may be integral with this closure member. The indicator can then be secured to the applicator of the device, this indicator can thus be directly in contact with the product, while the device is placed in the microwave oven. In the case where the device comprises a container bottom reported, the indicator may be integral with the bottom or be retained by him on the container. The bottom is for example slammed or welded to the container. As a variant, the indicator may also be presented by the external enclosure, preferably at the level of an outer surface of this external enclosure.

  The temperature sensitive indicator can be arranged in various ways on the kit. The indicator may be removable or permanently attached. In the case where the indicator is removable, it is for example in the form of an elastomeric ring comprising thermochromic pigments, can be slid and retained on an outer periphery of the outer enclosure and or the packaging device. The indicator may for example comprise at least one flexible support that can be fixed, for example by gluing or welding. The indicator may for example be in the form of a tablet or an adhesive label to be glued to a wall of the device or of the external enclosure, for example a wall of the container or a closure member of the container. , or a wall of the outer enclosure.

  The indicator can also be achieved by printing, or screen printing, on the kit of an ink comprising a thermochromic pigment. The indicator can also be formed by incorporating a thermochromic pigment into the material of at least part of the kit, for example the material of at least a part of the external enclosure, at least a part of the container, at least part of a closure member of the container, at least part of an attached bottom, if any, or at least part of the applicator, for an applicator element or rod connecting the applicator element to a gripping member, which may be formed by the closure member.

  The part of the kit comprising such thermochromic pigments can for example be obtained by bi-injection. In this case, a window can be made in said part of the kit and include said pigments.

  The indicator may comprise any material changing in appearance with temperature and for example cholesteric liquid crystals, possibly encapsulated, and preferably a material compatible with the passage of the device in a microwave oven. By way of example of materials changing in appearance with temperature, reference may be made, for example, to application EP 1 191 317 A1 or to patent US Pat. No. 5,786,578.

  The temperature-sensitive indicator can for example change its appearance, especially color, with the temperature, from one color to another when a predetermined temperature of turn is crossed. The indicator can still have a transparency that depends on the temperature, and become transparent or opaque from a certain temperature. Preferably, the indicator changes its appearance reversibly with temperature, that is to say, it resumes its initial appearance when it returns to its initial temperature. The indicator can still have a saturation of its color which is a function of the temperature.

  The indicator is chosen as a function of its turning temperature, and as a function of the thickness of the wall on which it is applied to take account, where appropriate of the thermal resistance of this wall, of its transmission coefficient of the heat, its thermal inertia, and its heat absorption coefficient. In this case, a changing indicator of state is chosen at a temperature below the temperature at which it is desired to heat the product, to take account of this difference in temperature that may exist between the product and the indicator when the latter is not directly in contact with the product but is separated therefrom by the wall of the container, and the wall of the outer enclosure where appropriate.

  Three types of indications may be required. First, the user may want to know if she can manually take the external speaker out of the oven after exposure to electromagnetic radiation, and then want to know if it can come out without risk for it, the container of this external speaker. Secondly, the user may want to know if the temperature reached by the product is not dangerous, that is to say that it is less than a first temperature Tm ,,, or TI, for example of the order of 50 C. Thirdly, the user may also want to know if the temperature of the product has been raised by the heating process, and that it is much higher than a second temperature T h, or T 2, for example of the order of 30. C to ensure a "hot" application of this product. When the temperature is between Tchaud and Tmax, it is in the right conditions for use of the product "hot".

  In a first embodiment, provision is made to have two separate indicators on the kit, each of these indicators having a different turning temperature. For example, a first indicator is placed on the outer enclosure while a second indicator is placed on the packaging device. For example, a first indicator has a turning temperature that makes it possible to know when the temperature TI has been exceeded, and a second indicator has a turning temperature that makes it possible to know when the temperature T2 has been exceeded. The turning temperatures are, for example, chosen to be less than a few C to T1 and T2 because of the thermal resistance of the walls between the indicator and the product.

  In a second embodiment, provision is made to arrange the temperature indicator on a wall of the container or outer enclosure having at least two different thicknesses. Thus by playing on the thermal resistance of this wall, related to its thickness, one can see the same indicator having moved in a first zone, and remained unchanged in a second zone. When only the thin zone has its indicator that has changed color, and that same indicator on the zone of greater thickness has remained unchanged, then the user can enter the external enclosure and possibly the container out of the external enclosure. Preferably the areas of greater thickness are gripping areas because they are actually less hot. In this case, for the indicator to be reliable, it is necessary to precisely control the thickness of the wall at which the indicator is fixed.

  To obtain such a container or such an external enclosure with a variable wall thickness, horizontal, vertical or helical streaks protruding from an outer periphery of the container or the outer enclosure, for example, are provided. In a variant, the container and / or the outer enclosure have, in a cross-section, a circular inner periphery, while their outer periphery may have any type of shape except that of a similarly circular shape whose center is superimposed on that of the periphery. inside. For example the outer periphery, according to this same cross section, may have an eccentric circular shape, ovoid, triangle, rectangle, or any type of polygon.

  At least one of the outer enclosure and or the conditioning device may comprise at least one safety valve to prevent the accumulation of excessive pressure inside the outer enclosure and respectively the device. it is inadvertently exposed to microwave radiation for too long a period.

  At least one of the conditioning device and or the external enclosure may also include an anti-projection member to reduce the risk of product projection at the opening of the device or the external enclosure under the effect overpressure created by heating the product, for example because of the expansion of the air. Such a member may be operable or not by the user prior to opening. Thus, in one embodiment, the anti-projection member comprises a portion on which the user can press to balance the pressures between the inside of the container and the outside, prior to opening the container.

  Alternatively, the anti-projection member automatically performs its function at the opening of the conditioning device during the extraction of the applicator. This anti-projection member may in particular be used in addition to the spinning of the application element. In another variant, it is the applicator itself that can reduce the risk of product projection at the opening, for example by forming a screen vis-à-vis possible product projections.

  The device may also include a flow reducing member serving for example to reduce the risk of loss of product in case of accidental spillage of the container, especially if the fluidity of the product is greatly increased with temperature.

  For example, an inner wall of the outer enclosure comprises means adapted to cooperate with the outer periphery of the conditioning device to maintain it in radial position and or fixed axial in the interior volume defined by the outer enclosure.

  Advantageously, the inner periphery of the outer enclosure comprises means for maintaining longitudinal walls of the conditioning device 30 at a distance from the inner walls of the outer enclosure.

  Preferably, the outer enclosure comprises two parts capable of being assembled to enclose the conditioning device in an interior volume defined by these two parts. Then, these two parts can be assembled in closed position in a non-sealed, non-hermetic manner, and or to provide a vent. This vent can be made on one of the parts, at a distance of a junction between these two parts.

  Preferably, the internal volume of the outer enclosure is at least equal to twice the total volume of the conditioning device.

  For example, a cross section of the outer enclosure has a homothetic inner circumference and greater than a cross section of the packaging device.

  Advantageously, the outer enclosure is at least partly transparent.

  The subject of the invention is also, independently or in combination with the foregoing, a method for promoting the sale of a kit comprising an external enclosure and a packaging device containing a cosmetic product, including a care product, with the exception of depilatory waxes, in which mention is made of the possibility of enclosing the container of the device in the outer enclosure and then placing the assembly in a microwave oven to raise the temperature of the product in order, for example, to modify properties of it, especially its rheology. This product is for example a care product or make-up such as a foundation or a mascara.

  The invention also relates, independently or in combination with the foregoing, to a method for promoting the sale of a packaging and application device containing a cosmetic product, in which mention is made of the possibility of obtaining two different makeup effects depending on whether the product is used hot or cold.

  Promotion of the product can be done by any communication channel. It may in particular be made by a seller, directly at the point of sale, by radio or television, particularly in the context of commercials. It may also be done through the print media or any other document, in particular for advertising purposes. It can also be done by a computer network or mobile phone.

  It may be made again on the packaging device or on a package or an explanatory note associated with it.

  The invention further relates, in another of its aspects, independently or in combination with the foregoing, a kit such that the container and or the outer enclosure comprise a wall made at least partly of a first material, and in that a thermal insulator at least partially surrounds the outer surface of said container (s). In this case, the thermal insulation is made in a second material of thermal conductivity lower than that of the first material.

  The invention also relates, independently or in combination with the foregoing, to a device comprising: a container, a cosmetic product, including a care product, contained in the container, an applicator provided with an applicator element - A wiper member arranged to dewater the applicator element at its outlet from the container, the applicator and the wiper member being arranged to let air escape at the opening of the device in case overpressure in the container.

  The invention also relates to the use of such a device in a process comprising the following steps: - raising the temperature of the product by placing the device in an external enclosure inside a microwave oven of preferably, - apply the product.

  The invention also relates to the use of a device comprising: - a container, - a cosmetic product contained in the container, - an applicator comprising at least one part made of a material having a heat capacity allowing it to store heat, in a process comprising the following steps: - raising the temperature of the product by placing the device in an outer enclosure, and together in a microwave oven, and then - applying the product.

  The desired heat capacity can be obtained by using, for example, a ceramic or a plastic material comprising a high percentage, for example greater than or equal to 60% by weight of a filler, for example a mineral filler, in particular a metallic filler, or a ceramic or a porous structure capable of deep loading with the product, the latter then storing the heat.

  The invention will be better understood on reading the following detailed description, non-limiting examples of implementation thereof, as well as on examining the appended drawing, in which: FIG. 1 is a block diagram illustrating steps of an exemplary method according to the invention; - Figures 2 to 10 and 33 to 38 illustrate various possibilities of realization, among others, of the temperature-sensitive indicator. FIGS. 11 to 15 represent different possibilities of carrying out thermal insulation on the container, FIG. 16 is an embodiment of an anti-projection device making it possible to let out an overpressure, FIG. from below the anti-projection member according to arrow XVII of FIG. 16, - FIGS. 18 and 19 show other examples of means 30 allowing an overpressure to escape, FIG. An example of a rotary applicator is shown in FIG. 21. FIG. 21 is a partial elevation of an example of a device comprising a foam applicator integral with the container, FIG. 22 is a schematic and partial longitudinal section of an example of a device comprising an applicator element integral with a closure member of the container, - Figure 23 represents an overmoulded pile in isolation, - Figure 24 shows an example of an applicator made of a material having a high heat capacity, - Figure 25 represents a cross-sectional view of another particular embodiment of an outer enclosure containing a container according to the invention, - Figure 26 illustrates an embodiment of a container having a shape providing a stable lying position; - Figures 27 and 28 show partially and schematically containers equipped with active safety means in case of too high pressure in the container; - Figure 29 shows a longitudinal sectional view of a device according to the invention such that the container has a wall of longitudinally variable thickness; - Figures 30a, 30b and 30c show side views of alternative embodiments of packaging device containers according to the invention; - Figures 31a to 31f and 32 show cross-sectional views of embodiments of containers of packaging devices according to the invention; FIG. 39 represents a side view of an alternative embodiment of a packaging device according to the invention; FIGS. 40a, 40b and 40c represent elements of a kit according to the invention at three successive stages of a method according to the invention; FIG. 41 represents a schematic view of a microwave oven inside which an external enclosure is disposed inside which a container of a packaging device according to the invention is disposed; - Figure 42 shows a first embodiment of an outer enclosure adapted to receive a container of a packaging device according to the invention; - Figure 43: shows a second embodiment of an outer enclosure adapted to receive a container of a packaging device according to the invention; FIG. 44 shows a third embodiment of an external enclosure adapted to receive a container of a packaging device according to the invention; - Figure 45: shows an alternative embodiment of an outer enclosure according to Figure 44 adapted to receive a container of a packaging device according to the invention; - Figure 46: shows a cross-sectional view of a particular embodiment of an outer enclosure containing a container of a packaging device according to the invention; - Figure 47: shows another alternative embodiment of an outer enclosure according to Figure 44 adapted to receive a container of a packaging device according to the invention.

  The block diagram of FIG. 1 illustrates various steps of a method for raising the temperature of a cosmetic product according to a first aspect of the invention.

  This method comprises a first step 10 of enclosing a container of a packaging device containing a cosmetic product in an external enclosure. The supply of the cosmetic product can be made by any sales channel, for example by selling in a shop or by correspondence, or by means of a beauty institute or a hairdressing salon, for example. The outer enclosure may be provided independently or in conjunction with the conditioning device.

  The process then comprises a step of heating the product in a microwave oven. The outer enclosure and the conditioning device are adapted to be placed in the microwave oven and preferably do not include any metallic or electrically conductive elements, which may deteriorate upon exposure to microwave radiation or to deteriorate the oven used.

  The emission power of the microwave radiation and the duration of exposure of the product to this radiation are chosen as a function of the temperature of the product to be achieved and the capacity of the conditioning device. Preferably, the power of the microwave oven is chosen such that the duration during which the product is exposed to microwave radiation is relatively short, for example less than 20 seconds, in particular of the order of a few seconds.

  Then, the external enclosure is removed from the microwave oven and the opening step of this external enclosure is made to access the heated product contained in the container. Finally the product is taken by means of an applicator of the packaging device in a step 30 for the purpose of applying this product. The applicator may be removably mounted on the container containing the product, and in particular detached from this container when it is placed in the microwave oven.

  The applicator is not visible in FIGS. 2 to 5 showing alternative packaging device 1. According to these examples, the packaging devices such as 1 comprise a container 41 closed by a closing member 42. The applicator can optionally be secured to this closure member 42, or integral with the container 41.

  FIGS. 16, 40b, 41, 42, 44, 45 and 47 represent the conditioning device 1 inside an external enclosure 400. This external enclosure 400 comprises at least two parts 401 and 402 capable of being assembled to allow a at least temporary enclosure of the conditioning device 1, especially during the heating step 20.

  The outer enclosure 400 may be obtained by molding, by injection, by machining. It can be made of plastic, preferably transparent or translucent. For example it is made from at least one of the following materials: polyethylene (PE), polypropylene (PP), polystyrene (PS), polyethylene terephthalate (PET), polycarbonate, polyvinyl chloride (PVC), polystyrene acrylonitrile ( SAN), acrylobutadiene styrene (ABS), amorphous or non-amorphous polyamide, silicone, plexiglass, macrolon, or plolyphenylene oxide sold under the name noryl by GE Plastics.

  This external enclosure 400 contains few polarized molecules able to heat up when subjected to microwave radiation. It comprises for example carbon fillers, glass beads, glass fibers, silicon carbonate, talc, a ceramic, wood fibers, barium sulfate, boron nitride. It can be covered on its outer walls with a flexible material or paint.

  The external enclosure 400 also offers good thermal resistance. It is also preferably resistant to shocks.

  Figure 44, the outer enclosure 400 has a first portion 401 and a second portion 402. The two parts 401 and 402 are assembled and define an interior volume 403 within which is disposed a conditioning device 1 according to the invention. The assembly forms the kit 404. The two parts 401 and 402 can be assembled by screwing, snapping, mounted in force on one another or by a bayonet type closure means. Preferably, this assembly is not leakproof so as to form a vent 418 to avoid overpressure in the inner volume 403, especially during heating. Alternatively, this vent 418 may consist of an orifice formed in at least one of the parts 401 and 402, as shown in particular in Figures 16, 22, 40b, and 41.

  Preferably, the assembly of these two parts 401 and 402 can be done in a high area 404 relative to a foot 405 providing a preferential bearing surface on which the user can place the external enclosure 400 so that it rests stably on a flat surface. This foot 405 can be monolithic with the first part 401, as is the case Figure 45, or reported on this first part, as is the case Figure 44. This foot 405 can for example be reported by breakdown or screwing . The foot 405 can also be over-injected on the first part 401. The foot 405 is preferably made of an elastomeric material, able to create a suction effect on the flat surface on which it is placed so as to improve its stability.

  Furthermore, the packaging device 1 has a substantially elongate envelope surface along a longitudinal axis. In this case, the external enclosure 400 is generally provided so that its internal volume 403 defines a volume also extending along a preferred axis of elongation 406. In this case, the conditioning device 1 is disposed in this interior volume 403 so that its longitudinal axis is superimposed with the axis 406. Preferably, the parts 401 and 402 are assembled in a translation movement along the axis 406.

  In fact, the conditioning device 1 having a substantially smaller diameter base, for example two to ten times less than a height, along the longitudinal axis, of the conditioning device 1, the latter is disposed in the outer enclosure 400 so that only a base 407 of the device 1 comes into contact with an inner wall 408 of the enclosure 400. The contact surface between the outer walls of the conditioning device and the inner wall 408 of the outer enclosure 400 is minimal.

  Indeed, the internal volume 403 is greater than the volume defined by the envelope surface of the packaging device 1. Thus, the longitudinal side walls 409 of the packaging device 1 do not come into contact with the inner wall 408. Preferably, the interior volume 403 is at least twice or even triple the volume defined by the envelope surface of the packaging device 1. Alternatively, it may nevertheless be less than this defined volume.

  Preferably, the inner wall 408 has means 410 for holding in place the conditioning device 1 with fixed radial position. Indeed, a flange 411 is provided at a bottom 412 formed by the inner wall 408. The insertion of the conditioning device 1 in the inner volume 403 leads to force the base 407 of the device 1 so that it is surrounded by this flange 411. Complementarily, an end 413 of the inner wall 408, opposite the bottom 412, may also have such radial holding means such as a flange 414. This flange 414 is then provided to enclose radially an end 415 of the conditioning device 1 opposite the base 407. The end 413 is for example presented by the second portion 402.

  For example, the flange 411 is provided to cooperate with the container 41, while the flange 414 is provided to cooperate with the closure member 42. Conversely, while the outer enclosure is provided to rest with its foot 405 on a flat surface and in particular the tray of a microwave oven, it can be provided that the flange 411 cooperates with the closure member 42 so that the product contained in the container 41 is brought close to an orifice of distribution, especially in cases where this dispensing orifice is in direct fluid communication with the applicator of the device.

  As a further variant, and or in addition to the flanges 411 and 414, the radial holding of the conditioning device 1 in the interior volume 403 can be obtained by grooves or grooves 416 shown in the cross-sectional view of FIG. grooves 416 may be defined on a section or the entire height of the inner wall 408. These grooves are then preferably evenly distributed around the conditioning device 1.

  In addition, the cooperation between the parts 401 and 402 can prevent any longitudinal mobility of the device 1 in the internal volume 403, especially in cases where a distance between the bottom 412 and the opposite end 413 is equal to slightly lower than a height of the conditioning device along its main axis of elongation.

  As shown in FIGS. 41, 42, 44 and 45, the outer enclosure 400 is provided to be disposed in such a way that its longitudinal axis 406 is orthogonally aligned with a surface on which it rests with its foot 405.

  Alternatively, as shown in Figs. 26, 43 and 47, the outer enclosure 400 may be placed in the furnace such that its axis of extension 406 is parallel to the surface on which it rests. Generally, the conditioning device 1 being of cylindrical shape, then the outer enclosure 400 also has a substantially cylindrical shape. But in the latter case, it comprises at least one outer wall 417 planar, see Figure 48, so as to rest stably. Moreover, the external base 400 can advantageously be made with a shape that allows it to be positioned flat without it rolling in the microwave oven, in order to take advantage of the distribution of the microwave field in the oven. . By way of example, there is shown in Figure 26 a base of square cross section, which can be lying on one of its sides. It can be seen in this figure that the base may comprise, for example, a mark 120 informing the user on the most suitable way to arrange it in the microwave oven. The base may also include a sign 121 indicating the possibility of placing the device in a microwave oven.

  The conditioning device 1 being disposed in this external enclosure 400, and the product being contained in the packaging device, in fact the product is not in direct contact with the inner walls 408 of the outer enclosure 400.

  In the cases where only the container 41 is disposed in the outer enclosure, then the product dispensing orifice of this container is disengaged and product can be projected inside the outer enclosure 400, when the heating step. Thanks to the external enclosure, this product will not dirty the oven.

  In the cases where the container 41 is closed by its closure member 42 inside the outer enclosure 400, an overpressure can be generated in the conditioning device 1 under the effect of heating, and the latter may crack , even explode. The product is then sprayed or dumped in the external enclosure 400. Thanks to the latter, this product is not likely to dirty the oven.

  In these two cases, the little product deposited in contact with the inner wall 408 will not lead to a significant warming of the walls of the enclosure 400, insofar as these walls have a high thermal resistance. The user will not burn by seizing the external enclosure 400, after heating, even if the conditioning device 1 has deteriorated. In addition, by transparency or at the opening of the external enclosure 400, the user may decide to discard the assembly to avoid using such a deteriorated device.

  The explosion resistance of the enclosure 400 is greater than that of the packaging device 1, because the internal volume 403 is significantly greater than the interior volume of the container 41, and because a vent such as 418 is provided. Even if the packaging device 1 explodes, the external enclosure will not explode, and the oven will not be dirty.

  The product may for example be a lipstick, a mascara, a foundation or a care product, this list not being limiting.

  The product can have, at ambient temperature, that is to say at 20 C, properties, in particular rheological, which allow an application at this temperature, in particular be liquid at ambient temperature, as well as other properties which also allow a application when the temperature is higher, for example greater than 30 C.

  At the end of the heating period in the microwave oven, the temperature of the product inside the conditioning device may exceed 50 C or 70 C. Advantageously, the conditioning device is equipped with a sensitive indicator. at the temperature, in particular of an indicator whose appearance, for example the color, changes with the temperature. This indicator can be for example in the form of a label or tablet 40 bonded to the side wall 409 of the container 41, as shown in Figure 2 or glued to a member 42 for closing the container, as shown in Figure 3 The closure member 42 may optionally constitute the gripping member of an applicator whose applicator element is present inside the container when the latter is closed.

  It is also possible to produce the temperature indicator by mixing with the material intended for example to form the upper part 45 of the container a thermochromic pigment. The temperature indicator is produced, in the example of FIG. 5, in the form of a strip 47 made for example by bi-injection or coextrusion with the wall of the container body, for example in a color-changing material. with the temperature. This band can serve as a window if it is made of a transparent material at at least some temperatures.

  It is also possible to deposit, by screen printing, for example on the side wall 409 of the container 41, a strip 46 as illustrated in FIG. 6 or any other pattern of an ink comprising a thermochromic pigment.

  In the examples of Figures 2 to 6, the indicator is visible from the outside. It is not beyond the scope of the invention when the indicator is not visible from the outside when the container is closed but becomes it either at the time of application or when the user performs a particular action, by extracting of the container the indicator for example.

  Alternatively, as shown in FIG. 44, a temperature indicator 440, made according to one of the embodiments described above and below, is disposed on the external enclosure 400 to inform the user, in particular after step 20 heating, without having to take it out of the oven. Preferably, this indicator is disposed on an outer side wall 445 of the enclosure 400.

  FIGS. 7 and 8 show a device 1 having a container 41 containing the product P and an applicator comprising an applicator element 160 fixed to the end of a rod 161 comprising a housing 162 in which can penetrate a temperature indicator 170. The latter comprises a rod 171 whose end 172 changes for example color with temperature. Openings 163 may, if appropriate, be made in the rod 161 to allow the product P to come into contact with the temperature indicator 170. In the example in question, the rod 171 is connected at its upper end to a threaded portion 174 which can be screwed onto the gripping member 165 of the applicator.

  If necessary, as illustrated in FIGS. 9 and 10, the temperature indicator can be fixed on the device so as to also serve as a safety valve in the event of too high a pressure in the container. The rod 171 of the temperature indicator may for example carry an O-ring 176 which in the absence of overpressure ensures a tight seal. A recess 177 is formed in the rod 171 and in case of overpressure the O-ring 176 locally deforms back into this recess 177, allowing the pressurized air to escape.

  An orifice 178 can be made, if necessary, in the upper part 178 of the temperature indicator to facilitate the exit of the air.

  Alternatively, shown in Figure 33, the indicator may be in the form of a ring 500 slid and retained on a substantially cylindrical outer periphery 409 of a container such as 41. As a further variant, shown in Figure 34 , the indicator may be in the form of a ring 501 U encircling at least in part the outer periphery 409 of the conditioning device 1 according to the invention. Free ends of this ring 501 in U can bear against a plane on which the device 1 is elongated. Thus the U-shaped indicator is also used to immobilize the device, in this case of substantially cylindrical shape, in a supine position relative to a plane.

  According to another embodiment, FIG. 35, the indicator may be in the form of a staple 502 having a first portion 503 to be clipped on the outer periphery of the device, and a second portion 504 for bearing against a plane parallel to which the device is intended to be extended. Thus this clip indicator serves to immobilize the device, in this case of substantially cylindrical shape, in a supine position relative to a plane, and also serves to raise it relative to this plane.

  A packaging device 1 may comprise a container such as 41 having a bottom 505 attached and an applicator mounted in the closure member such as 42 to close said container. Figure 36, the bottom 505 reported is mounted on the container 41 in a sealed manner, by breakdown, but also to retain at least one indicator 506, here two temperature indicators 506 and 507 respectively toric retained between said bottom 505 and said container 41.

  Alternatively, a container such as 41, shown in FIG. 37, has a screwed-down bottom 505, such that this bottom is made of a material comprising thermochromic pigments that can serve as an indicator.

  In another variant, Figure 38, a container such as 41 has a bottom 505 attached and an applicator mounted in the closure member 42 adapted to close this container. The bottom 505 attached is mounted on the container 41 in a sealed manner, by screwing, this bottom being preferably biinjected so as to have at least a portion 508 having a temperature indicator visible from the outer surface of the bottom.

  The temperature indicator may be produced by any known means, in particular using any known thermochromic pigment or any other material that changes color with temperature and is preferably compatible with the introduction of the packaging device in a heat oven. microwave to heat the product.

  According to another aspect of the invention, the packaging device 1 may comprise a thermal insulator 50, as illustrated in Figure 11, which may cover for example a portion of the side wall 409 of the container 41 containing the product. This insulator 50 may for example be in the form of a sleeve of a thermally less conductive material than that used to make the side wall 409 of the container 41, this sleeve being fixed in an annular groove formed on the container. Such an insulator 50 allows a more comfortable grip of the container 41 when it is removed from the outer enclosure 400, after heating in a microwave oven, and the temperature of the product is around 70 C for example.

  The insulation 50 can be made for example in a polyurethane foam or polyethylene. The insulation may also be made differently and for example in the form of a flocking coating 60 covering at least a portion of the side wall 409 of the container 41, as shown in FIG. 12. It is also possible to produce the insulation under the shape of a case 70, as shown in Figure 13, the case 70 having for example a general shape of thermowell for inserting the container 41. It is thus possible to realize the insulation in the form of bands 80 or other elements reported, for example by gluing, on the side wall 409 of the container 41, as illustrated in FIG. 14. The container 41 can also be made, for example, with fins 85, as illustrated in FIG.

  The outer enclosure 400 comprises for example an insulator 450 at its outer side wall 445, in particular in a gripping area of this enclosure. The insulation 450 is for example made according to one of the examples described above.

  The conditioning device can be arranged, according to another aspect of the invention, to allow air at excess pressure inside the container following the heating of the product to escape at the opening thereof, while limiting the risks of projection or product leakage.

  When the device is also used for the application of the product and comprises, as illustrated in FIG. 16, an applicator comprising an applicator element 90 and a wiper member 91 for dewatering the applicator element when it leaves the container. Advantageously, the wiper member 91 is advantageously designed so as to allow an overpressure present inside the container after the heating of the product P to escape gradually as soon as the container is opened. In FIG. 16, the device 1 is presented in a closed position and inside an enclosure such as 400.

  The wiper member 91 may for example be in the form of a block of foam provided with a passage for the applicator element 90, the passage comprising at least one slot and for example two slots 92 in the 17. These slots 92 allow the pressurized air to escape as soon as the closure member 42 is unscrewed sufficiently from the neck 48 of the container, while limiting the risk of product projection.

  In FIG. 16, it can be seen that the applicator element may be in the form of a flocked applicator, this applicator comprising, for example, a body formed of a tuft of bristles, for example in the form of a brush, or a flexible part, in particular silicone or elastomer, adapted to retain the product by capillarity. As a variant, the applicator may be porous and / or elastically deformable, the applicator element possibly comprising at least one of the elements chosen from the following list: a foam, a sinter, a felt, an elastomer or a plastic material, covered on its surface with a flocking coating. The applicator may still have no flocking. The applicator can thus be made for example by molding plastic material with a particular shape, especially a form for combing and or brushing eyelashes or eyebrows.

  In Figure 18, there is shown an applicator element 94 constituted by a comb, the latter being attached to one end of a rod 95 connected to a gripping member which also constitutes a closure member 42 of the container.

  The wringing and anti-splashing member is in the example in the form of an elastomer piece fixed in the neck 48 of the container and provided at its lower end with a squeezing lip 49 defining an opening , circular for example.

  The rod 95 may have a groove 97 allowing the pressurized air to escape during the opening of the container. This groove 97 may be annular or extend over only a fraction of the circumference of the stem.

  It is also possible to realize the wiper member with a plurality of radial slots 99, as illustrated in FIG. 19, these slots defining between them sectors 100 that can deform under the pressure of the air inside the container. to let it escape. Other means can also be used to reduce the risk of splashing product in the event of overpressure in the container.

  In Figure 20, there is shown partially a device in which the applicator has a rotary application element such as a ball 180 for example. This ball 180 makes it possible to apply the product while reducing the risk of product projection when the closing cap, not shown, is removed.

  The rotary application element can be replaced, for example, by a non-rotating application element, permanently fixed on the container, such as a foam 181 as illustrated in FIG. 21. It is also possible to provide for example between a space 87 of the container containing the product and an opening 88 through which the product is taken a perforated wall 86, as shown in Figure 22. Where appropriate, this wall 86 may serve as a seat for an application element 89. L the applicator element 89 is then secured to the closure member 42.

  In general, when microwave radiation is used to raise the temperature of the product P, the conditioning device is devoid of metal element and the applicator is made without metal. In the case where it is desired to use a brush, it can thus be made with bristles 103 superimposed on a support 104, as illustrated in FIG. 23, the bristles and the support being for example made of materials different thermoplastics.

  According to another aspect of the invention, it is possible to realize the applicator element so that it has a sufficiently high thermal resistance so that the product present on the applicator element does not cool down too much. quickly. It is thus possible to produce the applicator element, which is for example a comb as shown in FIG. 24, in a plastic material comprising a significant proportion of a mineral filler or the like which confers on it a high thermal capacity.

  For example, the application element can be produced by molding a thermoplastic or thermosetting material comprising a filler of a compound such as bronze or an aluminum oxide. In particular, it is possible to produce the application element by molding a mixture comprising 60% by weight of aluminum oxide and the remainder of polyamide or of polypropylene, which is another example. non-limiting, make the application element by molding a mixture comprising 40% by weight of polypropylene and 60% of a ceramic.

  It is also possible to increase the thermal resistance of the applicator element by using, in order to achieve it, a material capable of being deeply charged with the product to be applied, for example a porous material such as a foam or a sintered material. .

  To allow the product and the air to escape in case of accidental presence too long in the microwave oven in operation, a safety valve may be provided on the container. By way of example, there is shown partially in Figure 27 in axial section a container whose bottom 149 is provided with a shutter 150 forming a safety valve. This shutter is constituted for example by an elastomeric stopper fixed in a hole 151 of the bottom wall 149, capable of being ejected in case of too strong pressure in the container. The safety valve could be made, alternatively, by a thinning 154 of the bottom wall, as shown in Figure 28. In case of overpressure, the wall can break at the level of thinning.

  Furthermore, alternative embodiments of containers such as 41 are shown schematically in Figures 30a, 30b and 30c and are provided with striations on their outer periphery. These striations are respectively longitudinal, transverse or helical. Thus the thickness of the wall defining these containers is variable and allows to provide less warm gripping surfaces where the thickness of the wall is maximum.

  The wall thickness of containers such as 41 may be variable at their respective outer periphery as shown in the cross-sectional views of the embodiments shown in Figs. 31a to 31f. In another variant, as shown in FIG. 32, in a cross-sectional view of a container such as 41, the latter may also comprise longitudinal grooves of variable width projecting from its outer periphery, these grooves extending radially relatively to a substantially circular inner periphery of the container.

  FIG. 39 represents a view of a conditioning device 1 according to the invention comprising a porthole 509 making it possible to see through the product contained in the container 41. In a variant that is not shown, the external enclosure 400 may also include a window such as 509 to allow the user to check the condition of the packaging device that it contains.

  FIGS. 40a, 40b and 40c represent three successive steps of the method according to the invention in which a container M intended to be heated in the microwave oven 300 is previously disengaged from another support S which during the heating time of the container receives the applicator A, this applicator A can be randomly mounted on the container M or the support S. The container M is disposed in an external enclosure such as 400 inside the microwave oven 300. Only after heating the In the microwave oven, Figure 40b, the applicator A is released from the support S to take a dose of heated product in the container M. Out of use, as shown in FIG. 40a, the container M can be made integral with the support S in which the applicator A is stored. Due to the fact that it is disposed inside the external enclosure 400, the device conditioning 1 is raised relative to the plane on which the outer enclosure rests with respect to a position where it would be directly placed on this surface.

  A microwave oven 300 is diagrammatically shown in FIG. 41. Inside this oven 300 is disposed an external enclosure 400 inside which a conditioning device 1 is also arranged. For example, the oven 300 is equipped with a turntable 302 on which is placed the external enclosure 400. Preferably, the outer enclosure 400 is disposed in the center of the tray 302. In the embodiment shown, the device 1 is elevated relative to the plate 302, insofar as the external enclosure 400 comprises a booster 303. The booster 303 makes it possible to place the container 41 of this device 1 higher relative to the plane formed by the plate 302. Thus, the container 304 can be placed in a central zone of the oven 300, in which the microwave radiation is greater.

  According to a particular embodiment of a booster, shown in FIG. 42, the inner wall 408 of the outer enclosure 400 has at least one lug 306. For example, it comprises several nipples such as 306. This lug 306 cooperates with a thread 307 provided here at the outer periphery 409 of the container 41. For example, a closure means 42 of the device 1 allows easy handling of this device. The consumer can easily place the device 1 in a high position relative to the bottom 412 of the external enclosure 400 when it is disposed in the oven. Alternatively, the pin such as 306 may be presented on the outer periphery of the container 41 while the inner wall 408 of the outer enclosure provides a complementary thread such as 307.

  According to another particular embodiment of the invention, FIG. 43, the foot 405 is pivotable relative to an axis orthogonal to a principal elongation axis X of the enclosure 400. This foot 405 then makes it possible to present the device 1 in an elongate and elevated position relative to a plane on which the foot 405 rests. The X axis is then parallel to this plane. The pivoting foot 405 can also maintain the X axis orthogonal to the plane on which it rests, while allowing it to be raised relative to this plane. Indeed, the pivot 460 provided on the outer enclosure can cooperate with different complementary notches 461 of the foot 405. These notches 461 are for example defined continuously, and the pivot 460 can be moved in force from one notch to the next, for vary its height relative to the plane.

  Of course, the invention is not limited to the examples that have just been given. In particular, various features of the various embodiments can be combined with each other.

  Throughout the description, including the claims, the phrase having one must be understood to be synonymous with at least one, unless the opposite is specified.

Claims (31)

  An assembly (404) comprising a packaging device (1) and an external enclosure (400), the packaging device comprising an applicator and a container (41) containing a cosmetic product, and the external enclosure being able to contain least the container of the conditioning device, at least the outer enclosure and said container being capable of being subjected to radiation emitted by a microwave oven (300).   2. The assembly of claim 1 characterized in that the melting temperature of the walls of the outer enclosure is greater than the melting temperature of the container.   3. Assembly according to one of the preceding claims characterized in that the outer enclosure has a burst strength by internal overpressure greater than that of the container of the packaging device.   4. Assembly according to one of the preceding claims, characterized in that it comprises an indicator (40; 45; 46; 47; 170; 440) responsive to temperature.   5. An assembly according to the preceding claim, characterized in that the indicator changes color with the temperature, especially around a turning temperature.   6. Assembly according to any one of claims 4 to 5, characterized in that the indicator changes appearance reversibly with temperature.   7. An assembly according to any one of claims 4 to 6, characterized in that the indicator changes state at a temperature below that at which it is desired to heat the product.   8. An assembly according to any one of claims 4 to 7, characterized in that the container and or the outer enclosure have a variable thickness, and in that the indicator covers at least two zones of different thickness.   9. Assembly according to any one of the preceding claims, characterized in that it comprises two indicators, each indicator having a different turning temperature.   10. Assembly according to any one of the preceding claims, characterized in that the packaging device comprises a member (42; 165) closing the container.   11. Assembly according to any one of the preceding claims, characterized in that the container and the outer enclosure are permeable to microwaves.   12. An assembly according to any one of the preceding claims, characterized in that the outer enclosure has a mark (120) indicating the user the position in which it should be preferentially placed in the microwave oven.   13. An assembly according to any one of the preceding claims, characterized in that the outer enclosure comprises a wall (417) arranged to allow to lay it stably on a flat surface.   14. Assembly according to any one of the preceding claims, characterized in that it comprises a sign (121) informing the user on the possibility of placing it in a microwave oven.   15. An assembly according to any one of the preceding claims, characterized in that at least one of the conditioning device and or the outer enclosure comprises an anti-projection member to reduce the risk of product projection to the opening of the device or the outer enclosure respectively under the effect of an overpressure created by the heating of the product, in particular because of the expansion of the air.   16. An assembly according to any one of the preceding claims, characterized in that the packaging device comprises a flow-reducing member serving in particular to reduce the risk of loss of product in case of accidental spillage of the container.   17. Assembly according to any one of the preceding claims, characterized in that it is devoid of metal.   18. Assembly according to any one of the preceding claims, characterized in that the container and / or the outer enclosure comprise a wall made at least partly of a first material, and in that a thermal insulator (50; 60; 70; 80; 85; 450) at least partially surrounds the outer surface of the container and / or the outer enclosure.   19. An assembly according to the preceding claim, characterized in that the thermal insulator is made of a second material having a thermal conductivity lower than that of the first material.   20. An assembly according to any one of the preceding claims, characterized in that the conditioning device comprises a safety valve (150; 154; 176; 177) arranged to open in case of overpressure in the container.   21. An assembly according to any one of the preceding claims, characterized in that the outer enclosure comprises a booster (303) adapted to place the conditioning device higher relative to a plane on which it is placed.   22. An assembly according to any one of the preceding claims, characterized in that an inner wall (408) of the outer enclosure comprises means (411; 414; 416) adapted to cooperate with the outer periphery of the device. conditioning to maintain it in radial position and or fixed axial in the interior volume defined by the outer enclosure.   23. An assembly according to any preceding claim characterized in that the outer enclosure comprises two parts (401, 402) s able to be assembled to enclose the conditioning device in an interior volume (403) defined by these two parts.   24. An assembly according to the preceding claim characterized in that the two parts are assembled in the closed position in an unsealed manner and or to provide a vent (418).   io 25. An assembly according to any preceding claim characterized in that the internal volume of the outer enclosure is at least equal to twice the total volume of the packaging device.   26. An assembly according to any preceding claim characterized in that a cross section of the outer enclosure has a homothetic inner periphery and greater than a cross section of the packaging device.   27. An assembly according to any preceding claim characterized in that the outer enclosure is at least partially transparent.   28. A process for applying a cosmetic product (P), including care, excluding depilatory waxes, which product is contained in a container of a packaging device, the process comprising the following steps Place the container in an external enclosure, - Close the external enclosure, - Place the external enclosure in a microwave oven to raise the temperature of the product by subjecting it to microwave radiation. inside the oven, open the external enclosure, apply the product using an applicator.   29. The method of claim 28, characterized in that the packaging device comprises an applicator, the applicator being previously detached from the container, the container alone being disposed in the outer enclosure when the product is submitted to microwave radiation. .   30. The method of claim 28, characterized in that the applicator is disposed in the outer chamber to raise its temperature at an application surface.   31. Method according to one of claims 28 to 30, characterized in that the container is taken out of its outer enclosure, according to a reading of an indicator (40; 45; 46; 47; 170; 440), the indicator being preferably visible through the outer enclosure, or from a portion or an opening of the outer enclosure.