Patent Application
20060081661
The present invention relates a dispensing device for a product, and in particular to a device for spraying liquids in the form of a cloud of fine droplets, of the aerosol or spray type, etc.
According to a preferred form, the invention provides a device which is particularly advantageous for sprayable cosmetic products containing a certain quantity of resin designed to solidify on contact with the air. Non-limiting applications include, by way of example, hairstyling products such as hair lacquers and hair sprays. The invention can be used in other fields, for example, applications in the pharmaceutical field or for products such as paints, adhesives, etc.
In the field of cosmetics in particular (hair lacquers for example), many spray type products contain soluble polymers which, by evaporation of the solvent contained therein, are capable of solidifying.
Typically, such products are placed under pressure, either mechanically by means of a pump, or by means of a propellant gas, and the release of product is controlled by a dispensing head in the form of a pushbutton. It has been found that, after each spraying action obtained by pressing the pushbutton, an “inrush of air” tends to occur when the pressure exerted on the push button is relaxed. This air enters the delivery channel via the spray orifice, causing the resin in the residual product present in different parts of the dispensing head to solidify. The problem rapidly becomes critical in constricted spaces, particularly inside the delivery channel, and more particularly in proximity to the spray orifice. Thus, after a long period between uses, the resin will solidify at these points thereby blocking the dispensing head.
A solution to this problem involves immersing the pushbutton in a quantity of hot water, thereby causing the resins deposited inside the dispensing head to liquefy and facilitating the removal of these deposits. Although effective on certain deposits, this solution is obviously not very satisfactory.
EP-A-670 275 describes a device for dispensing the contents of a pressurised container, including a closure cap for the product dispensing aperture mounted slidably in a bore designed to communicate with the inside of the container. After each use, the closure cap seals off the dispensing aperture, thereby preventing any backflow of air into the delivery channels of the dispensing head.
In U.S. Pat. No. 3,254,677, the pushbutton is fitted with a kind of sliding yoke which, in the rest position, closes off the discharge aperture, and which is automatically released when the pushbutton is actuated.
In patent FR 1 573 165, a closure tab, integral with a resilient diaphragm, is pushed backward under the pressure of the product, thereby exposing the dispensing aperture. When product dispensing ceases, the closure seals off the dispensing aperture. Another retraction-type closure system is also described in U.S. Pat. No. 5,085,353.
All of these mechanisms have the drawback of being relatively complicated, and of substantially increasing the production cost of the dispensers. Moreover, some of these devices are fragile and can be unreliable in operation.
Spray devices that are simpler to make have been described in DE 2655777, U.S. Pat. No. 3,904,088 and U.S. Pat. No. 3,510,029. These spray devices include a dispensing head mounted on a valve stem and a cap fitted with a closure flap designed to conceal the spray orifice in the stowed position and to expose it in the use position.
In DE 26 55777 and U.S. Pat. No. 3,904,088, the flap only moves in front of the aperture in order to close it off and remains at a slight distance from the aperture. In U.S. Pat. No. 3,510,029, the internal face of the flap engages in a leaktight manner with an opening into which the spray orifice emerges. In the configuration described, the product is dispensed via a simple orifice as no fitted nozzle is provided in the opening. The orifice is additionally located in proximity to the axis of the valve stem, and the orifice relatively distant from the envelope surface of the container. In addition, the dispensing head is a component separate from the pushbutton so that an assembly stage is required to put the two components together.
One of the objects of the present invention is to provide a dispensing device which avoids or reduces one or more of the drawbacks mentioned in reference to devices of the prior art.
Another object of the present invention is to provide a dispensing device which prevents the product from drying inside conduits of the device between uses.
It is a further object of the invention to provide a dispensing device that has a relatively simple structure.
Other objects of the present invention will become evident from the detailed description which follows.
According a preferred example of the invention, a dispensing device is provided which can be mounted on a container fitted with a dispensing element through which product held in the container can emerge when the element is actuated. The device includes an element for mounting the device on the container. A dispensing head includes a dispensing orifice and a conduit to channel the product emerging from the dispensing element to the dispensing orifice. In addition, an actuating surface is provided, which is movable relative to the mounting piece, to actuate the dispensing element. For example, the actuating surface and the conduit can be formed by molding in a single piece. A closure member is configured to cover the dispensing orifice in a stowed position, and movement of the closure element to the stowed position is achieved from a force exerted by the closure element on the head, axially to the conduit, in the direction toward the dispensing element. Further, a stop is designed to limit the movement of the dispensing head in this direction as the closure element moves to the stowed position.
As the closure element bears against the head, it thus can be positioned as close as possible to the dispensing orifice thereby minimizing the presence of air in proximity to the orifice which is liable to cause the product to dry in the conduit of the dispensing head.
In addition, the presence of the stop serves to limit the retraction movement of the head when the closure element moves to the stowed position. This prevents the dispensing element on which the head is mounted from being actuated by the movement of the head.
The stop can be arranged in a manner such that a portion of the head is designed to bear against the stop when the closure element moves to the stowed position. The stop can thus be placed relatively close to the end of the head against which the closure element bears, thereby effectively preventing the retraction movement of the head.
The stop can be placed in proximity to the end of the head delineating the dispensing orifice. For example, the stop can be placed between the dispensing orifice and the portion of the head located on the axis of the dispensing element, and preferably closer to the dispensing orifice than to the portion of the head located on the axis of the dispensing element.
Preferably, by way of example, the stop can be arranged in a manner such that it is immobile during the movement of the actuating surface.
By way of example, the stop can include a notch configured to straddle the dispensing conduit. Alternatively, also by way of example, the stop can include two vertical walls integral with the mounting piece, with each vertical wall being situated on either side of the conduit.
The closure element can be, for example, a flap pivoted, such as by a film hinge, on the mounting piece about an axis, such as an axis substantially perpendicular to the principal axis of the conduit. The closure element can thus be made by molding in a single piece.
The closure element can be configured so that, in the stowed position, it limits the movement of the actuating surface, thereby preventing actuation of the dispensing element. The flap can include a wall, for example, intended to be placed against the dispensing orifice, with the wall being provided with a projecting element designed to fit, at least particularly, under the end of the conduit of the dispensing head. For example, the end of the head can be cylindrical and the projecting element can be a cylindrical skirt designed to surround the end of the conduit of the dispensing head. In addition, the closure element can be configured to close off the dispensing orifice in a leaktight manner so as to minimize drying of the product inside the head conduit. The outer surface of the conduit end may, for example, include an annular groove suitable for receiving an annular bead provided on the inner surface of the cylindrical skirt.
According to a disclosed example, the mounting piece can include a frontal opening facing the dispensing orifice, and this frontal opening can be sufficiently large so that the dispensing orifice remains facing the opening when the actuating surface is operated.
The closure element can include a mounting bracket for attachment to the mounting piece, and the bracket can include two vertical ribs designed to run in two slides provided on the mounting piece, for example. The slides can be located on each side of the frontal opening.
By way of example, the mounting piece, the actuating surface and the head can be obtained by molding as a single piece. The stop can also be obtained by molding in one piece with the mounting piece, the actuating surface and the head. Further by way of example, the closure element can also be obtained by molding in one piece with the mounting piece, the actuating surface and the head. The dispensing device can thus be produced at low cost.
The dispensing orifice can be delineated by a fitted nozzle, for example, such as a swirl nozzle. The nozzle can be fitted at one end of the conduit of circular transverse cross-section.
The invention also provides a packaging and dispensing device including a container holding the product to be dispensed, with the container equipped with a dispensing device such as that just described. The container can be pressurized and surmounted by a valve stem. The product held in the container can be a cosmetic product, for example, a hair product such as a lacquer.
As should be apparent, the invention can provide a number of advantageous features and benefits. It is to be understood that, in practicing the invention, an embodiment can be constructed to include one or more features or benefits of embodiments disclosed herein but not others. Accordingly, it is to be understood that the preferred embodiments discussed herein are provided as examples and are not to be construed as limiting, particularly since embodiments can be formed to practice the invention that do not include each of the features of the disclosed examples.
Apart from the arrangements described above, the invention can include a number of other features which will be explained below, in relation to non-limiting embodiments, described with reference to the attached figures in which:
The container may contain a product to be sprayed, for example a cosmetic product, and a propellant gas, which may or may not be stored in liquefied form in the container and which may or may not be dispensed with the product.
In the illustrated example, the dispensing device 10 includes a mounting piece 30, an actuating surface 40 and a dispensing head 50.
The mounting piece 30 includes a mounting skirt 31 which has a bead 32 (
The mounting skirt 31 is connected at the upper part to the actuating surface 40 by a film hinge 35, enabling the actuating surface to pivot relative to the mounting piece about an axis W (
The actuating surface 40 is connected, inside the device, to the dispensing head 50 which delineates a channel 51 designed to convey the product from the valve stem 22 to a dispensing orifice 81.
In this example, the head 50 includes a cylindrical rotating skirt 52 extending substantially in the axis X of the valve stem. The cylindrical skirt 52 is connected at its upper part to the actuating surface. At its lower end, the cylindrical skirt 52 defines a shouldered recess 53 into which the upper part of the valve stem can engage in a substantially leaktight manner, as can be seen in
The delivery channel 51 extends into a second portion, oriented transversely to the first, which is delineated by a conduit 55. In the illustrated example, the conduit 55 is elongated and extends in a direction along an axis Y, perpendicular to the axis X of the valve stem, and extends from the cylindrical skirt 52 to an end 56 emerging via a dispensing orifice 81. By way of example, the end 56 of the conduit 55 includes a nozzle mount 57 to which the conduit 55 is connected and to which a conventional swirl nozzle 80 can be attached, as can be seen in the Figures, with the nozzle delineating the dispensing orifice 81. The nozzle mount 57 incorporates a pin, also referred to as a “centerpost”, for this purpose. The presence of the nozzle enables the product to be atomised in the form of a good quality spray.
As can be seen in particular in
The conduit 55 extends on axis Y over a length greater than the length of the skirt 52 measured on axis X in this example. In particular, the length of the conduit 55 allows the dispensing orifice to be placed some distance from the valve stem thereby preventing the product emerging via the orifice from soiling the user's fingers when the actuating surface 40 is pressed. It is possible, for example, to use a conduit 55 of a length such that the orifice 81 extends substantially beyond the wall of the container.
In the example illustrated, the dispensing head 50 is made by plastic molding in one piece with the actuating surface 40 and the mounting piece 30.
A closure element 60 is provided to cover the dispensing orifice 81 in the stowed position as illustrated in
The flap 60 is configured so as to immobilize the actuating surface 40 when it is closed. To this end, it includes a projecting member 62 on the surface of its wall designed to line up with the dispensing orifice 81. The projecting member 62 is designed to fit under the end 56 of the conduit 55 of the dispensing head to prevent it from pivoting forward. In particular, the projecting member 62 is a cylindrical skirt designed to surround the end 56 of the conduit 55 of the dispensing head. While the head 50 is prevented from moving, the actuating surface 40 which is integral with the head 50 is therefore unable to move.
The flap 60 is additionally configured to seal off the dispensing orifice 81. To this end, the cylindrical skirt 62 of the flap includes an annular bead 63 intended, when the flap 60 is in the closed position, to fit into an annular groove 58 provided at the end 56 of the conduit. The dispensing orifice 81 is thus perfectly isolated from the outside.
As can be seen in
When closed, the flap 60 bears against the dispensing head 50 on the principal axis Y of the conduit 55 of the dispensing head in the direction of the valve stem, and a stop 70 is provided to limit the movement of the dispensing head 50.
In the example illustrated in
According to a variant illustrated in
Preferably, the stop 70 is located in proximity to the end surface of the conduit 55 against which the flap 60 bears so as to maximize resistance to the bearing force of the flap on the conduit, thereby minimizing the movement of the conduit. It is possible in fact to use a stop of lower resistance than if it were positioned to the rear of the conduit to obtain the same resistance.
The stop 70 can preferably extend to a height, measured parallel to the axis X of the valve stem, sufficient for the bearing surfaces 56a and 56b at the end portion 56 of the conduit 55 to remain against the stop even when the actuating surface is operated.
As the stop 70 is attached to the mounting piece 30, it remains immobile when the actuating surface is operated.
To use the device, the user opens the flap 60 as shown in
After spraying the product, the user releases the actuating surface so that the conduit 55 reverts to its initial position. The user can then close off the dispensing orifice 81 by pivoting the flap 60 about the axis Z so as to place it against the orifice 81, then pressing on the flap in the direction of axis Y in order to snap the skirt 62 onto the end 56 of the conduit 55. During this movement, the conduit 55 is pushed or forced in a direction slightly backwards, on axis Y. However, the backward movement of the head is limited by the stop 70 against which the rear of the end 56 of the conduit is abutted.
In the foregoing detailed description reference is made to preferred embodiments of the invention. It is evident that variants thereto can be proposed without departing from the invention as claimed herebelow. It is therefore to be understood that, within the scope of the appended claims, the invention may be practiced otherwise than as specifically described herein.
| Number | Date | Country | Kind |
|---|---|---|---|
| 0452357 | Oct 2004 | FR | national |
This document claims priority to French Application No. 04 52357, filed Oct. 18, 2004, and U.S. Provisional Application No. 60/622,604, filed Oct. 28, 2004, the entire contents of which are hereby incorporated by reference.
| Number | Date | Country | |
|---|---|---|---|
| 60622604 | Oct 2004 | US |
