EP0642839B1 - Process and device for storing and dispensing a fluid product held in a container pressurized with a propellant gas - Google Patents

Process and device for storing and dispensing a fluid product held in a container pressurized with a propellant gas Download PDF

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Publication number
EP0642839B1
EP0642839B1 EP94401909A EP94401909A EP0642839B1 EP 0642839 B1 EP0642839 B1 EP 0642839B1 EP 94401909 A EP94401909 A EP 94401909A EP 94401909 A EP94401909 A EP 94401909A EP 0642839 B1 EP0642839 B1 EP 0642839B1
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EP
European Patent Office
Prior art keywords
propellant gas
dispensing
compartment
valve
product
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP94401909A
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German (de)
French (fr)
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EP0642839A1 (en
Inventor
Vincent De Laforcade
Pierre Lasserre
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LOreal SA
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LOreal SA
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D83/00—Containers or packages with special means for dispensing contents
    • B65D83/14—Containers or packages with special means for dispensing contents for delivery of liquid or semi-liquid contents by internal gaseous pressure, i.e. aerosol containers comprising propellant for a product delivered by a propellant
    • B65D83/60—Contents and propellant separated
    • B65D83/62—Contents and propellant separated by membrane, bag, or the like
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B9/00—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour
    • B05B9/03—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material
    • B05B9/04—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material with pressurised or compressible container; with pump
    • B05B9/08—Apparatus to be carried on or by a person, e.g. of knapsack type
    • B05B9/0805—Apparatus to be carried on or by a person, e.g. of knapsack type comprising a pressurised or compressible container for liquid or other fluent material
    • B05B9/0838—Apparatus to be carried on or by a person, e.g. of knapsack type comprising a pressurised or compressible container for liquid or other fluent material supply being effected by follower in container, e.g. membrane or floating piston, or by deformation of container
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D83/00—Containers or packages with special means for dispensing contents
    • B65D83/14—Containers or packages with special means for dispensing contents for delivery of liquid or semi-liquid contents by internal gaseous pressure, i.e. aerosol containers comprising propellant for a product delivered by a propellant
    • B65D83/60—Contents and propellant separated
    • B65D83/64—Contents and propellant separated by piston

Definitions

  • the present invention relates to a method of dispensing and packaging a fluid product contained in a pressurized container using a propellant gas, more particularly advantageous when the propellant gas is not compatible with the fluid product to be dispensed, and a device for implementing said method.
  • fluid product is understood to mean a product in the form of a liquid or in the form of a more or less viscous paste or cream.
  • a container comprising two compartments separated by a movable partition, a first compartment, containing the fluid product and being in communication with a product distribution valve, and a second compartment containing the compressed gas.
  • the movable partition moves and / or deforms.
  • the movable partition may consist of a deformable membrane; it is preferably constituted by a piston. This type of device is designed to isolate the fluid to be dispensed from the propellant and thus delay the degradation of the fluid by the propellant.
  • a method according to the preamble of claim 1 and a device according to the preamble of claim 4 are known from DE-A-3 934 237.
  • This document proposes to distribute using a propellant gas a product contained in a container comprising two compartments separated by a movable partition, one of the compartments containing the product and communicating with a product distribution valve and the other compartment comprising a valve for introducing the propellant gas and a device for depressurizing the propellant gas.
  • the product is distributed and when the product is exhausted, before filling the compartment containing the product, the gas compartment is depressurized so as to avoid any unwanted distribution of product.
  • the movable wall is not always absolutely sealed, either because the joints between the movable wall and the container are not sealed, or because the movable wall has a certain permeability to the propellant gas.
  • the tightness is lower when the fluid is less viscous and the pressure of the compressed gas in the second compartment is higher. Consequently, during storage, the compressed gas may gradually leak into the first compartment containing the fluid product and the latter may be degraded after a certain storage time. This problem arises, for example, in the case where the compressed gas is air and the fluid product is a hair dye.
  • the present invention it has been found that it is possible to avoid the degradation of a fluid product, even a slightly viscous one, by an incompatible propellant gas, in a container separated into two compartments by a movable partition, although the joint between the wall of the container and the movable partition is not strictly sealed and / or that the movable partition has a certain permeability, by maintaining in the second compartment the propellant gas at atmospheric pressure during storage and by not increasing the pressure in said second compartment only to allow said distribution, the container being pressurized only for a very short time close to the distribution time.
  • the present invention therefore relates to a method of packaging and dispensing a fluid product contained in a pressurized container using a propellant gas, the container comprising two compartments separated by a movable partition, a first compartment containing the fluid product and being in communication with a product distribution valve and the second compartment containing the propellant gas and provided with a device for introducing the propellant gas under pressure and with a device for depressurizing the propellant gas characterized in that '', before each distribution, the propellant gas is brought into the second compartment at a pressure P1 allowing the distribution of the fluid product by action on the distribution valve, which is dispensed, while lowering the pressure in the second compartment up to '' at atmospheric pressure thanks to a propellant gas leak made between the second compartment and the atmosphere during dispensing of the product, and after the dispensing stage of the product, the rate of leakage of the propellant gas being chosen so that a sufficient dispensing time is available and the pressure in the compartment is not reduced at a pressure allowing product distribution only just before
  • the propellant is preferably a compressed gas, air.
  • the gas is preferably introduced.
  • propellant, in particular compressed air using a compressor or other source of compressed gas via a valve arranged in the wall of the compartment containing the propellant gas.
  • the compressor used can, for example, be that described in FR-A 2 656 047.
  • a leak is created between the second compartment and the atmosphere.
  • the pressure is brought to the value P1 greater than atmospheric pressure and allowing the distribution by actuation of the distribution valve and the leakage rate of the propellant gas is chosen in such a way that we can have sufficient distribution time. It is considered, in practice, that a dispensing time of 1 to 10 minutes is suitable in the case of dispensing cosmetic products.
  • the present invention also relates to a device allowing the implementation of the method according to the invention; a device for packaging and dispensing a fluid product comprising a container pressurized with a propellant gas, the container comprising two compartments separated by a movable partition, the first compartment containing the fluid product to be distributed and communicating with a distribution valve carried by the container and the second compartment containing the propellant gas, the wall of the second compartment carrying a valve for supplying compressed propellant gas and a device for depressurizing the propellant gas, characterized in that said depressurization device consists of a leak opening having no closing means and allowing the propellant gas to leak into the atmosphere.
  • the leakage opening can be independent of the propellant gas supply valve and it is then advantageously constituted by a micro-opening pierced in the wall of the second compartment.
  • the leak opening is part of the compressed propellant gas supply valve.
  • the valve for supplying compressed propellant gas is a valve with a valve that does not does not close tightly on its seat in the closed position when the propellant gas supply is complete.
  • the leakage opening is then formed by the space existing between the valve and its seat.
  • the valve is constituted by a valve of elastic material resting on a seat and a fine groove is formed in the seat and / or the valve so as to create a leakage opening between the valve and its seat in closed position. This latter embodiment is advantageous since there is no leakage of compressed propellant gas during the pressurization phase.
  • the device according to the invention is designated as a whole by the reference 1.
  • the device 1 consists of a container 2 divided into two compartments 3 and 4 by a movable partition formed by a piston 5.
  • the first compartment 3 contains the product P to be dispensed and the second compartment 4 contains the propellant gas G.
  • On the container 2, is set a dispensing valve 6 which communicates with the compartment 3 and which carries a rod 7 which can be pushed in using '' a push button (not shown) for actuating the valve 6 and dispensing the product P.
  • the bottom 8 of the container 2 forms a conical bowl with concavity facing outwards and it is provided , in its center, of a valve 9 forming a plug which will be described below in more detail.
  • the piston 5 comprises a transverse element 10 carrying a cylindrical skirt 11 facing the second compartment 4.
  • the transverse element 10 has peripherally a conical portion 12 whose convexity is turned towards the compartment 3 and which is connected in its center has a depression 13 facing the compartment 3.
  • this depression 13 is formed by successively cylindrical, frustoconical and cylindrical side walls and a bottom perpendicular to the axis of the container 2; thus, the depression 13 has a shape complementary to that of the valve 6.
  • the cylindrical skirt 11 of the piston 5 is provided with two sealing lips: a first lip 14 disposed in the vicinity of the transverse element 10 and facing the compartment 3, and a second lip 15 located at the open end of the skirt 11 and facing towards the bottom 8 of the container 2.
  • An O-ring seal 16 is disposed, in a groove 17 of the skirt 11, between the lips 14 and 15.
  • the valve 9 is made up of two parts which fit into each other: a membrane 18 made of elastic material forming a valve and a body 19 made of rigid plastic material forming the seat of the valve.
  • the elastic membrane 18 comprises a frustoconical side wall 20 whose end of larger diameter carries a groove 27 making it possible to fix said elastic membrane 18, by snapping, on the bottom 8 of the container 2. At the end of smaller diameter its side wall 20, the elastic membrane 18 is extended along a transverse part 21 comprising an axial opening 22.
  • the rigid body 19 has a shape complementary to the elastic membrane 18 and therefore comprises a frustoconical side wall 25 extended according to a transverse piece 26.
  • a conduit 23 is formed which is parallel to the axis of the valve 9 and which opens in the vicinity of the junction between the frusto-conical wall 25 and the transverse part 26.
  • the end of the larger diameter of the frusto-conical wall 25 extends along a cylindrical wall 30 provided with an annular flange 28 which defines, with the frustoconical wall 25, a groove 31 receiving the large diameter end of the frustoconical wall 20 of the elastic membrane 18: thus, when the rigid body 19 is fixed to the bottom 8 of the container 2, the elastic membrane 18 is joined sealing; an annular flange 29 formed in the lower part of the body 19 allows the adaptation of the valve 9 to a gas compressor (not shown).
  • a groove 24 is formed which, when the rigid body 19 and the membrane 18 are assembled, communicates the opening 22 and the conduit 23.
  • the device 1 operates in the manner described below.
  • the user wishes to distribute the product P contained in the compartment 3 of the container 2, he places the container 2 on a gas compressor (not shown), in particular air, so that the valve 9 is in communication with the compressor distribution nozzle.
  • the compressed gas G passes through the conduit 23, deforms the elastic membrane 18 by detaching it from the body 19 and enters the compartment 4 through the opening 22.
  • the groove 24, if it allows a certain amount of gas to pass propellant G would not by itself allow the supply of gas G to compartment 4 in a short time: the pressure in compartment 4, which was equal to atmospheric pressure, increases.
  • the pressurization is continued until the pressure reaches a predetermined value P1 sufficient to allow the product to be dispensed when the dispensing valve 6 is actuated.
  • the user stops the supply of compressed gas G and separates the compressor container 2.
  • the user actuates the valve 6 and distributes the product P contained in the compartment 3.
  • the piston 5 moves longitudinally in translation towards the valve 6 despite the slight leakage of propellant gas G through the valve 9. Due to the displacement of the piston and the slight leakage of propellant gas G, the pressure in compartment 4 decreases.
  • the dimensions of the groove 24 are chosen so that the rate of leakage of the propellant gas G is such that the distribution can last from 1 to 10 minutes.
  • the device 1 is only pressurized for a few minutes at the time of use.
  • the propellant G is compressed air
  • the device 1 is not sensitive to heat and presents no danger of explosion.
  • it is ecological, the gas released into the atmosphere being air.
  • FIG. 3 represents a second embodiment of a device according to the invention designated as a whole by the reference 101.
  • This device 101 comprises a container 102 separated into two compartments: a compartment 103 containing the product P to be dispensed and a compartment 104 containing the compressed gas G. These two compartments are separated by a movable partition 105 which is constituted by a deformable pocket.
  • the bottom of the container 102 is provided with a valve 109 identical to that illustrated in FIG. 2.
  • a distribution valve 106 On the side opposite the bottom of the container carrying the valve 109 is set a distribution valve 106 which communicates with the compartment 103 containing the product to be dispensed P.
  • the deformable pocket 105 is fixed, for example, by a weld 130 on the body of the valve 106.
  • a pressure P is established in compartment 104, allowing distribution, only at the time of distribution, the pressure in compartment 104 then returning to atmospheric pressure. Consequently, even if the walls of the pocket 105 are slightly permeable to gas, the gas will hardly have a tendency to pass through the wall of the pocket and the risks of degradation of the product P contained in the pocket are low.

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  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Description

La présente invention concerne un procédé de distribution et de conditionnement d'un produit fluide contenu dans un récipient pressurisé à l'aide d'un gaz propulseur, plus particulièrement avantageux lorsque le gaz propulseur n'est pas compatible avec le produit fluide à distribuer, ainsi qu'un dispositif pour la mise en oeuvre dudit procédé.The present invention relates to a method of dispensing and packaging a fluid product contained in a pressurized container using a propellant gas, more particularly advantageous when the propellant gas is not compatible with the fluid product to be dispensed, and a device for implementing said method.

Selon la présente invention, on entend par produit fluide, un produit sous forme de liquide ou sous forme de pâte ou de crème plus ou moins visqueuse.According to the present invention, the term “fluid product” is understood to mean a product in the form of a liquid or in the form of a more or less viscous paste or cream.

Il est connu d'utiliser, pour le conditionnement et la distribution d'un produit fluide contenu dans un récipient pressurisé par un gaz non compatible avec le produit fluide, un récipient comportant deux compartiments séparés par une cloison mobile, un premier compartiment, contenant le produit fluide et étant en communication avec une valve de distribution du produit, et un second compartiment contenant le gaz comprimé. Lors de la distribution, la cloison mobile se déplace et/ou se déforme. La cloison mobile peut être constituée par une membrane déformable ; elle est, de préférence, constituée par un piston. Ce type de dispositif est prévu pour isoler le produit fluide à distribuer du gaz propulseur et ainsi retarder la dégradation du produit fluide par le gaz propulseur.It is known to use, for the packaging and the distribution of a fluid product contained in a container pressurized by a gas not compatible with the fluid product, a container comprising two compartments separated by a movable partition, a first compartment, containing the fluid product and being in communication with a product distribution valve, and a second compartment containing the compressed gas. During distribution, the movable partition moves and / or deforms. The movable partition may consist of a deformable membrane; it is preferably constituted by a piston. This type of device is designed to isolate the fluid to be dispensed from the propellant and thus delay the degradation of the fluid by the propellant.

Un procédé selon le préambule de la revendication 1 et un dispositif selon le préambule de la revendication 4 sont connus par DE-A-3 934 237. Ce document propose de distribuer à l'aide d'un gaz propulseur un produit contenu dans un récipient comportant deux compartiments séparés par une cloison mobile, l'un des compartiments contenant le produit et communiquant avec une vanne de distribution du produit et l'autre compartiment comprenant une vanne d'introduction du gaz propulseur et un dispositif de dépressurisation du gaz propulseur. Selon le brevet DE-A-3 934 237, on distribue le produit et lorsque le produit est épuisé, avant de remplir le compartiment contenant le produit on dépressurise le compartiment à gaz de façon à éviter toute distribution non désirée de produit.A method according to the preamble of claim 1 and a device according to the preamble of claim 4 are known from DE-A-3 934 237. This document proposes to distribute using a propellant gas a product contained in a container comprising two compartments separated by a movable partition, one of the compartments containing the product and communicating with a product distribution valve and the other compartment comprising a valve for introducing the propellant gas and a device for depressurizing the propellant gas. According to patent DE-A-3 934 237, the product is distributed and when the product is exhausted, before filling the compartment containing the product, the gas compartment is depressurized so as to avoid any unwanted distribution of product.

Dans les dispositifs de ce type, la paroi mobile, plus particulièrement lorsqu'elle est constituée par un piston, n'est pas toujours absolument étanche soit que les joints entre la paroi mobile et le récipient ne soient pas étanches, soit que la paroi mobile présente une certaine perméabilité au gaz propulseur. L'étanchéité est d'autant plus faible que le produit fluide est moins visqueux et que la pression du gaz comprimé dans le second compartiment est plus élevée. Par conséquent, au cours du stockage, le gaz comprimé peut fuir progressivement dans le premier compartiment contenant le produit fluide et celui-ci peut être dégradé après un certain temps de stockage. Ce problème se pose, par exemple, dans le cas où le gaz comprimé est de l'air et où le produit fluide est une teinture capillaire.In devices of this type, the movable wall, more particularly when it is constituted by a piston, is not always absolutely sealed, either because the joints between the movable wall and the container are not sealed, or because the movable wall has a certain permeability to the propellant gas. The tightness is lower when the fluid is less viscous and the pressure of the compressed gas in the second compartment is higher. Consequently, during storage, the compressed gas may gradually leak into the first compartment containing the fluid product and the latter may be degraded after a certain storage time. This problem arises, for example, in the case where the compressed gas is air and the fluid product is a hair dye.

Selon la présente invention, on a trouvé que l'on peut éviter la dégradation d'un produit fluide, même faiblement visqueux, par un gaz propulseur non compatible, dans un récipient séparé en deux compartiments par une cloison mobile, bien que le joint entre la paroi du récipient et la cloison mobile ne soit pas rigoureusement étanche et/ou que la cloison mobile ait une certaine perméabilité, en maintenant dans le second compartiment le gaz propulseur à pression atmosphérique pendant le stockage et en n'augmentant la pression dans ledit second compartiment que pour permettre ladite distribution, le récipient n'étant pressurisé que pendant un temps très court voisin du temps de distribution.According to the present invention, it has been found that it is possible to avoid the degradation of a fluid product, even a slightly viscous one, by an incompatible propellant gas, in a container separated into two compartments by a movable partition, although the joint between the wall of the container and the movable partition is not strictly sealed and / or that the movable partition has a certain permeability, by maintaining in the second compartment the propellant gas at atmospheric pressure during storage and by not increasing the pressure in said second compartment only to allow said distribution, the container being pressurized only for a very short time close to the distribution time.

La présente invention a donc pour objet un procédé de conditionnement et de distribution d'un produit fluide contenu dans un récipient pressurisé à l'aide d'un gaz propulseur, le récipient comportant deux compartiments séparés par une cloison mobile, un premier compartiment contenant le produit fluide et étant en communication avec une valve de distribution du produit et le second compartiment contenant le gaz propulseur et muni d'un dispostif d'introduction du gaz propulseur sous pression et d'un dispositif de dépressurisation du gaz propulseur caractérisé par le fait qu'on amène, avant chaque distribution, dans le second compartiment le gaz propulseur à une pression P1 permettant la distribution du produit fluide par action sur la valve de distribution, qu'on effectue la distribution, tout en abaissant la pression dans le second compartiment jusqu'à la pression atmosphérique grâce à une fuite de gaz propulseur ménagée entre le second compartiment et l'atmosphère pendant a distribution du produit, et après le stade de distribution du produit, le débit de fuite du gaz propulseur étant choisi de façon telle que l'on puisse disposer d'un temps de distribution suffisant et la pression dans le compartiment n'étant ramenée à une pression permettant la distribution du produit que juste avant la distribution suivante.The present invention therefore relates to a method of packaging and dispensing a fluid product contained in a pressurized container using a propellant gas, the container comprising two compartments separated by a movable partition, a first compartment containing the fluid product and being in communication with a product distribution valve and the second compartment containing the propellant gas and provided with a device for introducing the propellant gas under pressure and with a device for depressurizing the propellant gas characterized in that '', before each distribution, the propellant gas is brought into the second compartment at a pressure P1 allowing the distribution of the fluid product by action on the distribution valve, which is dispensed, while lowering the pressure in the second compartment up to '' at atmospheric pressure thanks to a propellant gas leak made between the second compartment and the atmosphere during dispensing of the product, and after the dispensing stage of the product, the rate of leakage of the propellant gas being chosen so that a sufficient dispensing time is available and the pressure in the compartment is not reduced at a pressure allowing product distribution only just before the next distribution.

Le gaz propulseur est un gaz comprimé, de préférence, de l'air. Pour amener le compartiment contenant le gaz propulseur à une pression permettant la distribution, on introduit de préférence, le gaz propulseur, en particulier l'air comprimé, à l'aide d'un compresseur ou d'une autre source de gaz comprimé par l'intermédiaire d'une vanne disposée dans la paroi du compartiment contenant le gaz propulseur. Le compresseur utilisé peut, par exemple, être celui décrit dans FR-A 2 656 047.The propellant is preferably a compressed gas, air. To bring the compartment containing the propellant gas to a pressure allowing the distribution, the gas is preferably introduced. propellant, in particular compressed air, using a compressor or other source of compressed gas via a valve arranged in the wall of the compartment containing the propellant gas. The compressor used can, for example, be that described in FR-A 2 656 047.

Pour ramener à la pression atmosphérique la pression du second compartiment après une distribution, on ménage une fuite entre le second compartiment et l'atmosphère. Lors de l'opération de mise sous pression du compartiment gazeux, on amène la pression à la valeur P1 supérieure à la pression atmosphérique et permettant la distribution par actionnement de la valve de distribution et on choisit le débit de fuite du gaz propulseur de façon telle que l'on puisse disposer d'un temps de distribution suffisant. On considère, en pratique, qu'un temps de distribution de 1 à 10 minutes est convenable dans le cas de la distribution de produits cosmétiques.To reduce the pressure of the second compartment to atmospheric pressure after dispensing, a leak is created between the second compartment and the atmosphere. During the pressurization operation of the gas compartment, the pressure is brought to the value P1 greater than atmospheric pressure and allowing the distribution by actuation of the distribution valve and the leakage rate of the propellant gas is chosen in such a way that we can have sufficient distribution time. It is considered, in practice, that a dispensing time of 1 to 10 minutes is suitable in the case of dispensing cosmetic products.

La présente invention a également pour objet un dispositif permettant la mise en oeuvre du procédé selon l' invention ; un dispositif pour le conditionnement et la distribution d'un produit fluide comportant un récipient pressurisé à l'aide d'un gaz propulseur, le récipient comportant deux compartiments séparés par une cloison mobile, le premier compartiment contenant le produit fluide à distribuer et communiquant avec une valve de distribution portée par le récipient et le second compartiment contenant le gaz propulseur, la paroi du second compartiment portant une vanne d'alimentation en gaz propulseur comprimé et un dispositif de dépressurisation du gaz propulseur, caractérisé par le fait que ledit dispositif de dépressurisation consiste en une ouverture de fuite ne comportant pas de moyen de fermeture et permettant la fuite dans l'atmosphère du gaz propulseur.The present invention also relates to a device allowing the implementation of the method according to the invention; a device for packaging and dispensing a fluid product comprising a container pressurized with a propellant gas, the container comprising two compartments separated by a movable partition, the first compartment containing the fluid product to be distributed and communicating with a distribution valve carried by the container and the second compartment containing the propellant gas, the wall of the second compartment carrying a valve for supplying compressed propellant gas and a device for depressurizing the propellant gas, characterized in that said depressurization device consists of a leak opening having no closing means and allowing the propellant gas to leak into the atmosphere.

L'ouverture de fuite peut être indépendante de la vanne d'alimentation en gaz propulseur et elle est alors, avantageusement, constituée par une micro-ouverture percée dans la paroi du second compartiment. De préférence, l'ouverture de fuite fait partie de la vanne d'alimentation en gaz propulseur comprimé. Par exemple, selon ce dernier mode de réalisation, la vanne d'alimentation en gaz propulseur comprimé est une vanne à clapet dont le clapet ne se referme pas de façon étanche sur son siège en position de fermeture lorsque l'alimentation en gaz propulseur est terminée. L'ouverture de fuite est alors constituée par l'espace existant entre le clapet et son siège. Selon un mode de réalisation préféré, la vanne est constituée par un clapet en matière élastique reposant sur un siège et une fine rainure est ménagée dans le siège et/ou le clapet de façon à créer une ouverture de fuite entre le clapet et son siège en position de fermeture. Ce dernier mode de réalisation est avantageux car il n'y a pas de fuite de gaz propulseur comprimé pendant la phase de mise sous pression.The leakage opening can be independent of the propellant gas supply valve and it is then advantageously constituted by a micro-opening pierced in the wall of the second compartment. Preferably, the leak opening is part of the compressed propellant gas supply valve. For example, according to this latter embodiment, the valve for supplying compressed propellant gas is a valve with a valve that does not does not close tightly on its seat in the closed position when the propellant gas supply is complete. The leakage opening is then formed by the space existing between the valve and its seat. According to a preferred embodiment, the valve is constituted by a valve of elastic material resting on a seat and a fine groove is formed in the seat and / or the valve so as to create a leakage opening between the valve and its seat in closed position. This latter embodiment is advantageous since there is no leakage of compressed propellant gas during the pressurization phase.

Pour mieux faire comprendre l'invention, on va en décrire, ci-après, à titre purement illustratif et non limitatif, deux modes de réalisation représentés sur le dessin annexé.To better understand the invention, we will describe below, purely by way of illustration and not limitation, two embodiments shown in the accompanying drawing.

Sur ce dessin :

  • la figure 1 est une vue partiellement en coupe d'un premier mode de réalisation d'un dispositif selon l'invention, et
  • la figure 2 est une vue en détail de la vanne d'alimentation en gaz du dispositif de la figure 1,
  • la figure 3 est une vue partiellement en coupe d'un second mode de réalisation d'un dispositif selon l'invention.
On this drawing :
  • FIG. 1 is a partially sectioned view of a first embodiment of a device according to the invention, and
  • FIG. 2 is a detailed view of the gas supply valve of the device in FIG. 1,
  • Figure 3 is a partially sectional view of a second embodiment of a device according to the invention.

Sur la figure 1, le dispositif selon l'invention est désigné dans son ensemble par la référence 1. Le dispositif 1 est constitué par un récipient 2 divisé en deux compartiments 3 et 4 par une cloison mobile constituée par un piston 5. Le premier compartiment 3 contient le produit P à distribuer et le second compartiment 4 contient le gaz propulseur G. Sur le récipient 2, est sertie une valve 6 de distribution qui communique avec le compartiment 3 et qui porte une tige 7 pouvant être enfoncée à l'aide d'un bouton-poussoir (non représenté) pour actionner la valve 6 et distribuer le produit P. Selon le mode de réalisation représenté, le fond 8 du récipient 2 forme une cuvette de forme conique à concavité tournée vers l'extérieur et il est muni, en son centre, d'une vanne 9 formant bouchon qui sera décrite ci-après plus en détail.In Figure 1, the device according to the invention is designated as a whole by the reference 1. The device 1 consists of a container 2 divided into two compartments 3 and 4 by a movable partition formed by a piston 5. The first compartment 3 contains the product P to be dispensed and the second compartment 4 contains the propellant gas G. On the container 2, is set a dispensing valve 6 which communicates with the compartment 3 and which carries a rod 7 which can be pushed in using '' a push button (not shown) for actuating the valve 6 and dispensing the product P. According to the embodiment shown, the bottom 8 of the container 2 forms a conical bowl with concavity facing outwards and it is provided , in its center, of a valve 9 forming a plug which will be described below in more detail.

Le piston 5 comporte un élément transversal 10 portant une jupe cylindrique 11 tournée vers le second compartiment 4. L'élément transversal 10 présente périphériquement une portion conique 12 dont la convexité est tournée vers le compartiment 3 et qui se raccorde en son centre à une dépression 13 tournée vers le compartiment 3. Selon l'exemple représenté, cette dépression 13 est formée de parois latérales successivement cylindrique, tronconique et cylindrique et d'un fond perpendiculaire à l'axe du récipient 2 ; ainsi, la dépression 13 a une forme complémentaire de celle de la valve 6.The piston 5 comprises a transverse element 10 carrying a cylindrical skirt 11 facing the second compartment 4. The transverse element 10 has peripherally a conical portion 12 whose convexity is turned towards the compartment 3 and which is connected in its center has a depression 13 facing the compartment 3. According to the example shown, this depression 13 is formed by successively cylindrical, frustoconical and cylindrical side walls and a bottom perpendicular to the axis of the container 2; thus, the depression 13 has a shape complementary to that of the valve 6.

La jupe cylindrique 11 du piston 5 est munie de deux lèvres d'étanchéité : une première lèvre 14 disposée au voisinage de l'élément transversal 10 et tournée vers le compartiment 3, et une seconde lèvre 15 située à l'extrémité ouverte de la jupe 11 et tournée vers le fond 8 du récipient 2. Un joint torique d'étanchéité 16 est disposé, dans une rainure 17 de la jupe 11, entre les lèvres 14 et 15.The cylindrical skirt 11 of the piston 5 is provided with two sealing lips: a first lip 14 disposed in the vicinity of the transverse element 10 and facing the compartment 3, and a second lip 15 located at the open end of the skirt 11 and facing towards the bottom 8 of the container 2. An O-ring seal 16 is disposed, in a groove 17 of the skirt 11, between the lips 14 and 15.

La vanne 9 est constituée de deux pièces s'emboîtant l'une dans l'autre : une membrane 18 en matériau élastique formant clapet et un corps 19 en matériau plastique rigide formant le siège du clapet. La membrane élastique 18 comporte une paroi latérale tronconique 20 dont l'extrémité de plus grand diamètre porte une rainure 27 permettant de fixer ladite membrane élastique 18, par claquage, sur le fond 8 du récipient 2. A l'extémité de plus faible diamètre de sa paroi latérale 20, la membrane élastique 18 se prolonge selon une pièce transversale 21 comportant une ouverture axiale 22.The valve 9 is made up of two parts which fit into each other: a membrane 18 made of elastic material forming a valve and a body 19 made of rigid plastic material forming the seat of the valve. The elastic membrane 18 comprises a frustoconical side wall 20 whose end of larger diameter carries a groove 27 making it possible to fix said elastic membrane 18, by snapping, on the bottom 8 of the container 2. At the end of smaller diameter its side wall 20, the elastic membrane 18 is extended along a transverse part 21 comprising an axial opening 22.

Le corps rigide 19 a une forme complémentaire de la membrane élastique 18 et comporte donc une paroi latérale tronconique 25 prolongée selon une pièce transversale 26. Dans la paroi tronconique 25, est ménagé un conduit 23 qui est parallèle à l'axe de la vanne 9 et qui s'ouvre au voisinage de la jonction entre la paroi tronconique 25 et la pièce transversale 26. L'extrémité de plus grand diamètre de la paroi tronconique 25 se prolonge selon une paroi cylindrique 30 munie d'une collerette annulaire 28 qui définit, avec la paroi tronconique 25, une gorge 31 recevant l'extrémité de grand diamètre de la paroi tronconique 20 de la membrane élastique 18 : ainsi, lorsque le corps rigide 19 est fixé sur le fond 8 du récipient 2, la membrane élastique 18 fait joint d'étanchéité ; une collerette annulaire 29 ménagée à la partie inférieure du corps 19 permet l'adaptation de la vanne 9 à un compresseur de gaz (non représenté). A la surface extérieure du corps 19, est ménagée une rainure 24 qui, lorsque le corps rigide 19 et la membrane 18 sont assemblés, met en communication l'ouverture 22 et le conduit 23.The rigid body 19 has a shape complementary to the elastic membrane 18 and therefore comprises a frustoconical side wall 25 extended according to a transverse piece 26. In the frustoconical wall 25, a conduit 23 is formed which is parallel to the axis of the valve 9 and which opens in the vicinity of the junction between the frusto-conical wall 25 and the transverse part 26. The end of the larger diameter of the frusto-conical wall 25 extends along a cylindrical wall 30 provided with an annular flange 28 which defines, with the frustoconical wall 25, a groove 31 receiving the large diameter end of the frustoconical wall 20 of the elastic membrane 18: thus, when the rigid body 19 is fixed to the bottom 8 of the container 2, the elastic membrane 18 is joined sealing; an annular flange 29 formed in the lower part of the body 19 allows the adaptation of the valve 9 to a gas compressor (not shown). On the outer surface of the body 19, a groove 24 is formed which, when the rigid body 19 and the membrane 18 are assembled, communicates the opening 22 and the conduit 23.

Le dispositif 1 fonctionne de la façon décrite ci-après. Lorsque l'utilisateur désire distribuer le produit P contenu dans le compartiment 3 du récipient 2, il dispose le récipient 2 sur un compresseur de gaz (non représenté), en particulier d'air, de façon que la vanne 9 soit en communication avec la buse de distribution du compresseur. Le gaz G comprimé passe par le conduit 23, déforme la membrane élastique 18 en la décollant du corps 19 et pénètre dans le compartiment 4 par l'ouverture 22. Il faut noter que la rainure 24, si elle laisse passer une certaine quantité de gaz propulseur G, ne permettrait pas à elle seule l'alimentation en gaz G du compartiment 4 en un temps court : la pression dans le compartiment 4, qui était égale à la pression atmosphérique, augmente. On poursuit la mise sous pression jusqu'à ce que la pression atteigne une valeur P1 prédéterminée suffisante pour permettre la distribution du produit lorsqu'on actionne la valve de distribution 6. L'utilisateur arrête alors l'alimentation en gaz comprimé G et sépare le récipient 2 du compresseur.The device 1 operates in the manner described below. When the user wishes to distribute the product P contained in the compartment 3 of the container 2, he places the container 2 on a gas compressor (not shown), in particular air, so that the valve 9 is in communication with the compressor distribution nozzle. The compressed gas G passes through the conduit 23, deforms the elastic membrane 18 by detaching it from the body 19 and enters the compartment 4 through the opening 22. It should be noted that the groove 24, if it allows a certain amount of gas to pass propellant G, would not by itself allow the supply of gas G to compartment 4 in a short time: the pressure in compartment 4, which was equal to atmospheric pressure, increases. The pressurization is continued until the pressure reaches a predetermined value P1 sufficient to allow the product to be dispensed when the dispensing valve 6 is actuated. The user then stops the supply of compressed gas G and separates the compressor container 2.

La membrane élastique 18, sous l'action de cette pression P1, reprend sa position de repos sur le corps rigide 19 : la rainure 24 met en communication l'ouverture 22 et le conduit 23 et permet une faible fuite de gaz propulseur G du compartiment 4 dans l'atmosphère à travers le conduit 23. Peu après avoir enlevé le récipient 2 du compresseur, l'utilisateur actionne la valve 6 et distribue le produit P contenu dans le compartiment 3. Le piston 5 se déplace longitudinalement en translation vers la valve 6 malgré la légère fuite de gaz propulseur G par la vanne 9. Du fait du déplacement du piston et de la légère fuite de gaz propulseur G, la pression dans le compartiment 4 diminue. On choisit les dimensions de la rainure 24 pour que le débit de fuite du gaz propulseur G soit tel que la distribution puisse durer de 1 à 10 minutes. Lorsque la distribution a cessé ou a été arrêtée, l'utilisateur ayant cessé d'actionner la valve 6, la pression à l'intérieur du compartiment 4 continue à décroître progressivement, jusqu'à ce qu'elle atteigne la pression atmosphérique grâce à la rainure 24 de la vanne 9. L'utilisateur ne rétablira une pression P1 dans le compartiment 4, que lorsqu'il désirera effectuer une nouvelle distribution de produit.The elastic membrane 18, under the action of this pressure P1, returns to its rest position on the rigid body 19: the groove 24 connects the opening 22 and the conduit 23 and allows a low leakage of propellant G from the compartment 4 in the atmosphere through the conduit 23. Shortly after removing the container 2 from the compressor, the user actuates the valve 6 and distributes the product P contained in the compartment 3. The piston 5 moves longitudinally in translation towards the valve 6 despite the slight leakage of propellant gas G through the valve 9. Due to the displacement of the piston and the slight leakage of propellant gas G, the pressure in compartment 4 decreases. The dimensions of the groove 24 are chosen so that the rate of leakage of the propellant gas G is such that the distribution can last from 1 to 10 minutes. When the dispensing has stopped or has been stopped, the user having stopped actuating the valve 6, the pressure inside the compartment 4 continues to decrease progressively, until it reaches atmospheric pressure thanks to the groove 24 of valve 9. The user will not restore a pressure P1 in compartment 4, only when it wishes to carry out a new distribution of product.

Dans ces conditions, le dispositif 1 n'est pressurisé que quelques minutes au moment de l'emploi. De plus, lorsque le gaz propulseur G est de l'air comprimé, le dispositif 1 n'est pas sensible à la chaleur et ne présente pas de danger d'explosion. En outre, il est écologique, le gaz rejeté dans l'atmosphère étant de l'air.Under these conditions, the device 1 is only pressurized for a few minutes at the time of use. In addition, when the propellant G is compressed air, the device 1 is not sensitive to heat and presents no danger of explosion. In addition, it is ecological, the gas released into the atmosphere being air.

La figure 3 représente un second mode de réalisation d'un dispositif selon l'invention désigné dans son ensemble par la référence 101. Ce dispositif 101 comporte un récipient 102 séparé en deux compartiments : un compartiment 103 contenant le produit P à distribuer et un compartiment 104 contenant le gaz comprimé G. Ces deux compartiments sont séparés par une cloison mobile 105 qui est constituée par une poche déformable. Le fond du récipient 102 est muni d'une vanne 109 identique à celle illustrée sur la figure 2. Du côté opposé au fond du récipient portant la vanne 109 est sertie une valve 106 de distribution qui communique avec le compartiment 103 contenant le produit à distribuer P. La poche déformable 105 est fixée, par exemple, par une soudure 130 sur le corps de la valve 106.FIG. 3 represents a second embodiment of a device according to the invention designated as a whole by the reference 101. This device 101 comprises a container 102 separated into two compartments: a compartment 103 containing the product P to be dispensed and a compartment 104 containing the compressed gas G. These two compartments are separated by a movable partition 105 which is constituted by a deformable pocket. The bottom of the container 102 is provided with a valve 109 identical to that illustrated in FIG. 2. On the side opposite the bottom of the container carrying the valve 109 is set a distribution valve 106 which communicates with the compartment 103 containing the product to be dispensed P. The deformable pocket 105 is fixed, for example, by a weld 130 on the body of the valve 106.

Dans ce dispositif, on n'établit dans le compartiment 104 une pression P, permettant la distribution, qu'au moment de la distribution, la pression dans le compartiment 104 revenant ensuite à la pression atmosphérique. Par conséquent, même si les parois de la poche 105 sont légèrement perméables au gaz, le gaz n'aura pratiquement pas tendance à traverser la paroi de la poche et les risques de dégradation du produit P contenu dans la poche sont faibles.In this device, a pressure P is established in compartment 104, allowing distribution, only at the time of distribution, the pressure in compartment 104 then returning to atmospheric pressure. Consequently, even if the walls of the pocket 105 are slightly permeable to gas, the gas will hardly have a tendency to pass through the wall of the pocket and the risks of degradation of the product P contained in the pocket are low.

Claims (11)

  1. Method for packaging and dispensing a fluid product (P) contained in a receptacle (2, 102) which is pressurized with the aid of a propellant gas (G), the receptacle (2, 102) including two compartments (3, 103; 4, 104) which are separated by a moving partition (5, 105), a first compartment (3, 103) containing the fluid product (P) and being in communication with a valve (6, 106) for dispensing the product (P) and the second compartment (4, 104) containing the propellant gas (G) and equipped with a device for letting the pressurized propellant gas in, and with a device for depressurizing the propellant gas, characterized in that in the second compartment (4, 104), before each dispensing act, the propellant gas (G) is brought to a pressure P1 allowing the fluid product (P) to be dispensed by action on the dispensing valve (6), that dispensing is carried out, lowering the pressure in the second compartment (4, 104) to atmospheric pressure by virtue of a leakage of propellant gas (G) between the second compartment (4, 104) and the atmosphere during the dispensing of the product, and after the step of dispensing the product, the leakage flow rate of the propellant gas (G) being chosen such that sufficient dispensing time is available, the pressure in the compartment (4, 104) not being brought back up to a pressure allowing dispensing of the product (P) until just before the next dispensing act.
  2. Method according to Claim 1, characterized in that the propellant gas (G) is compressed air.
  3. Method according to one of Claims 1 and 2, characterized in that the dispensing time is from 1 to 10 minutes.
  4. Device for packaging and dispensing a fluid product (P) including a receptacle (2, 102) which is pressurized with the aid of a propellant gas (G), the receptacle (2, 102) including two compartments (3, 103 and 4, 104) which are separated by a moving partition (5, 105), the first compartment (3, 103) containing the fluid product (P) to be dispensed and communicating with a dispensing valve (6, 106) carried by the receptacle (2, 102) and the second compartment (4, 104) containing the propellant gas (G), the wall of the second compartment (4, 104) carrying a valve (9, 109) for feeding with compressed propellant gas (G) and a device for depressurizing the propellant gas, characterized in that the said depressurization device consists in a leakage orifice (22, 23, 24) which does not have any closure means and allows the propellant gas (G) to leak into the atmosphere.
  5. Device according to Claim 4, characterized in that the moving partition (5) is a piston.
  6. Device according to Claim 4, characterized in that the moving partition (105) is a deformable pouch.
  7. Device according to Claim 4, characterized in that the leakage orifice is a micro-orifice pierced in the wall of the compartment (4, 104).
  8. Device according to Claim 4, characterized in that the leakage orifice (22, 23, 24) forms part of the valve (9, 109) for feeding with compressed propellant gas (G).
  9. Device according to Claim 8, characterized in that the valve (9, 109) for feeding with compressed propellant gas (G) is a valve with a shut-off element, in which the shut-off element does not rest on its seat in a leaktight fashion in the closed position.
  10. Device according to Claim 9, characterized in that the valve (9, 109) for feeding with compressed propellant gas (G) includes an elastic shut-off element interacting with a seat and a groove is formed in the shut-off element and/or the seat so as to create the leakage orifice between the shut-off element and its seat in the closed position.
  11. Device according to Claim 10, characterized in that the shut-off element is made up of an elastic membrane (18) interacting with a rigid body (19), the elastic membrane (18) being provided with an orifice (22) and the rigid body (19) being provided with a duct (23), a groove (24) being formed in the rigid body (19) so as to place the orifice (22) and the duct (23) in communication even when the valve is in the closed position.
EP94401909A 1993-09-10 1994-08-29 Process and device for storing and dispensing a fluid product held in a container pressurized with a propellant gas Expired - Lifetime EP0642839B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9310774A FR2709738B1 (en) 1993-09-10 1993-09-10 Method and device for dispensing and packaging a fluid product contained in a pressurized container using a propellant gas.
FR9310774 1993-09-10

Publications (2)

Publication Number Publication Date
EP0642839A1 EP0642839A1 (en) 1995-03-15
EP0642839B1 true EP0642839B1 (en) 1996-09-25

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EP94401909A Expired - Lifetime EP0642839B1 (en) 1993-09-10 1994-08-29 Process and device for storing and dispensing a fluid product held in a container pressurized with a propellant gas

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US (1) US5522526A (en)
EP (1) EP0642839B1 (en)
DE (1) DE69400608T2 (en)
ES (1) ES2092385T3 (en)
FR (1) FR2709738B1 (en)

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FR2709738B1 (en) 1995-11-10
FR2709738A1 (en) 1995-03-17
EP0642839A1 (en) 1995-03-15
US5522526A (en) 1996-06-04
DE69400608T2 (en) 1997-02-06
ES2092385T3 (en) 1996-11-16
DE69400608D1 (en) 1996-10-31

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