FR2783513A1 - Generation of propulsive gas for atomizing liquid, comprises propulsive gas generation method to negate the need to store the liquid in a pressurized state - Google Patents

Abstract

The propulsive gas is created by the system shortly before using the spray by means of a reactive mixture. The system is composed of a support (01) having a housing (07) for storing the liquid product to be distributed. The support has another housing (103) containing a reactive solid (04). A cavity (102) in the support receives a sealed pouch (05) containing a reactive liquid. A cover (02) has a deformable part (101) allowing perforation of the pocket to increase the volume of the chamber.

Description

": 2783513

  The present invention relates to a device for

  distribution of liquid, viscous or powdery products.

  Traditionally, a dispenser is composed of a container and a closure system allowing the distribution of the product. This distribution can be achieved by different means: pumping, deformation of the container, inversion of the container or storage under

pressure and valve distribution.

  All of these distribution systems require, by their mechanical constructions, a space requirement which does not allow them to be easily installed in a reduced space requirement. In the case of systems distributed by pumping the liquid, viscous or powdery product, the pump is composed of a number of parts which is often very large, between 5 and 12 parts. The pumping system imperatively requires at least a double valve and a metering chamber. This type of distribution system is frequently used in the packaging of liquid products, such as perfumes, oils, viscous products, such as creams and other powdery products such as certain active ingredients used in pharmacies. In the case of inversion systems, no

  pressure does not allow the vaporization of a liquid product.

  In the case of systems dispensing the liquid, viscous or powdery product by deformation of the container, the dosage is very imprecise and requires a container

  large enough for easy use.

  Storing the product under pressure requires complex technical means for packaging the product. The propellant is constantly under pressure during the storage time of the product thus representing

  a certain danger (toxic gas leaks or explosion).

  On the other hand, it is well known that the mixture of certain reagents, for example sodium bicarbonate and acid, causes the creation of a gas. The nature of the gas

  being dependent on the basic reagents used.

  The present invention aims to remedy the drawbacks of the prior art by defining a device based on the distribution of a liquid, viscous or powdery product under pressure of a propellant created during the actuation of the system and during

the use of the system.

  The product distributed can therefore be packaged and stored at atmospheric pressure, or under vacuum, airless system. To do this, the present invention provides a system for dispensing a liquid, viscous or powdery product contained in a housing provided for this purpose. Said distribution system comprises a support and a cover, thus forming a compact and coherent unit. Thus, the support fulfills a dual function of storing the product to be distributed and of storing the components which will allow the

formation of a propellant.

  The present invention also defines a device composed of a liquid and one or more solid reagents, for example in the form of a powder tablet or any other solid composition, and of a bag containing a second liquid reagent. These two reagents stored separately are perfectly inert. It is the mixture of these two reagents which causes the creation of a propellant gas. The pressure of the gas contained in a chamber provided for this purpose increases as the reaction takes place. This propellant gas will push the product to be dispensed in order to extract it from the storage housing. The product can be stored in a hollow cavity, the spraying being carried out by a nozzle, or by a dispensing nozzle, a system frequently used for spraying and dispensing perfumes, creams or active principle, or any other liquid, viscous products.

  or powder stored in an atomizer or aerosol.

  3- The liquid product can also be filled with fibers in a hollow cavity. The spray will then

  produced by the gas / liquid mixture.

  The invention will now be described more fully with reference to the accompanying drawings giving, by way of nonlimiting example, two possible embodiments of the present invention. Figure 1 shows a vertical cross-sectional view through a distribution system according to a

  first possible embodiment.

  Figure 2 shows a top view of this

first possible realization.

  Figure 3 shows a vertical cross-sectional view through a distribution system according to a

  second possible embodiment.

  Figure 4 shows a cross-sectional view

  vertical of a possible variant of the deformation zone.

  FIG. 5 represents a vertical cross-sectional view of the propellant gas formation zone,

deformed by pressure.

  The two embodiments illustrated in the figures

  1 and 3 differ on the exterior geometry of the systems.

  The system of FIGS. 1 and 2 is of prismatic shape then

  that the system described in Figure 3 is cylindrical in shape.

  The dispensing device of FIG. 1 as a whole comprises three essential constituent elements, namely a spraying member (03), here a nozzle (03),

  a reaction chamber (103) and a rigid support (01).

  The type and principle of spraying, here a nozzle (03), or a storage fiber (07) is not critical to the invention, and will therefore not be described in detail. The support (01) consists of a housing (07) for storing the product to be dispensed. This housing can be of any shape, of cylindrical shape in this example. The support (01) is composed of another housing (103) reserved for the storage of a solid reactive product (04), for example in the form of a crown, any other form that can be envisaged. A last cavity (102) is arranged in the support (01) to receive a sealed pocket of liquid reactive product (05). A cover (02) covering the assembly in a leaktight manner is fixed to the support (01) by welding, screwing or any other fixing principle. Part of the cover (02) is deformable, the deformation is made possible by the nature of the material used, for example, made of plastic, but any other flexible material can be used. Deformation is also made possible by varying the thickness of material in the deformation zone (101) and

  by the adapted geometry of the cover (02).

  The deformable part (101) of the cover (02) thus allows the bursting or the perforation of the pocket (05) containing the liquid reactive product. The perforation of the pocket (05) can be made easier by a perforator (104) (FIG. 4) produced on the support (01), or by a perforator (105) on the cover (02) or on both

parts (01) and (02).

  The deformable part (101) of the cover (02) can advantageously be produced symmetrically on the support (01) (FIG. 4) thus improving the ease of perforation. Ribs (106) make it possible to locate the deformable zones (101), and allow the solid reagent (04) to be maintained. Openings (107) are arranged between the ribs (106) to allow a passage for the liquid reagent (05) so that it can come into contact easily with the

solid reagent (04).

  The mixture of these two reagents (05) and (04), by way of example sodium bicarbonate and acid, produces carbon dioxide whose pressure increases during the reaction. This example of creation of propellant gas is not limiting and any other mixture of reagent causing the creation of a gas can be envisaged. The increase in gas pressure is generated by the fact that the reaction is produced in a cavity whose outlet, deliberately - very small (0.1 to 1 mm O), is blocked by a wall

thin (08) gas tight.

  Advantageously, the deformable part (101) deforms under the effect of the pressure of the gas, thereby increasing the volume of gas produced (FIG. 5). This deformation will also serve as a pressure regulator during dispensing

of the product.

  A thin wall (08), tight to the product gas, allows the pressure build-up in the chambers (102-103). The thin wall (08) tears when the internal pressure exceeds its mechanical resistance, thus allowing the gas to pass into the storage chamber (07) to push the product to be dispensed. A wall (06) impermeable to liquids ensures separation between the reactive liquid and the product to be dispensed. This wall (06) can be made in

  fiber, micro-porous product or any other suitable material.

  The system according to the invention is particularly intended to be used for spraying liquid products such as perfumes, viscous such as cosmetic creams or the distribution of powdery products such as certain active ingredients used in pharmacy, for samples or testers, the system being for single use. -6-

Claims (6)

  1) Distribution system for distributing a liquid, viscous or powdery product characterized in that the propellant gas is produced when the   system and while using the system.   2) System according to claim n 1 wherein the propellant gas produced after mixing of reagents, allows thanks to the rise in internal pressure, the distribution of   liquid, viscous or powdery product.   3) System according to claim n 1 characterized in that the deformable wall of the cover (02) allows the perforation or the bursting of the pocket (05) containing one or several liquid reagents.   4) System according to claim n 1 according to which the internal pressure is obtained by the reaction of solid and liquid reagents. Reaction from mixing these reagents.   ) System according to claim 4 according to which the internal pressure is regulated by a deformable part (101) deforming under the action of the pressure of the gas, increasing   thus the volume of propellant created.   6) System according to claim No. 1 in which a wall (06) is impermeable to liquids and permeable to gases, ensures the separation between the reagents (04) and (05) and the products to be distributed.   7) System according to claim No. 5 wherein a thin-walled sheet (08) will allow the pressure build-up in the chamber before tearing, allowing thus the distribution of the product.