Background of the Invention
The present invention relates to an applicator tube for liquid or semi-liquid cosmetic products, in particular for mascara.
Known mascara tubes commonly comprise a small bottle containing the mascara which can be closed by a cap to which there is rigidly secured a rod having at its other end a spiral brush which permits application of the mascara to the eyelashes.
When the tube is closed, the rod and the brush extend into the mascara, and when the user removes one brush from the tube the brush passes through a constriction which serves to wipe it so as to eliminate the surplus mascara, the constriction being generally formed as a narrowing of the mouth of the bottle portion.
Such tubes, however, have a number of drawbacks. On the one hand, the user does not use all the product with which the brush is impregnated but generally only a third thereof, which raises the problem that the entire contents of the bottle may be contaminated by bacteria brought back in by the brush upon its reintroduction, making it necessary to add a large amount of preservatives to the product.
Furthermore, it is not possible to use the entire amount of the product contained within the bottle, in view of the length of the rod and the diameter of the brush, resulting in a loss for the consumer.
Still further, as the bottle is used, the amount of air contained in the bottle increases and the product dries out.
Finally, the mascara always accumulates on the rod, which results in progressive clogging of the cap and the danger of the end of the brush becoming stuck.
Summary of the Invention
According to one of its principal features, the present invention is directed at overcoming these various drawbacks by proposing an applicator tube which comprises, within a tubular outer body, a measured-quantity distributing device on a removable container which is independent of the outer body.
Like the existing applicator tubes, the tube in accordance with the invention has means for applying the cosmetic product which are fitted to the end of a rod and may include a spiral brush for the application of mascara, or a small sponge for the application of a product of the liquid lip rouge type, a so-called "lip gloss".
When the tube is closed, the brush or sponge is positioned in a recess which communicates with the mouth of the measured-quantity distributing device.
The product is used by exerting pressure on the tube, for instance on one of its ends, which has the effect of releasing an amount of mascara which emerges from the container and spreads out in the recess, impregnating the brush. The user then takes out the brush which passes over a wiper.
The drawbacks of the existing devices are thus done away with; on the one hand, the reintroduction the brush cannot contaminate the mascara contained in the bottle part and, furthermore, all the product can be used. In addition, the product is not in contact with the air and therefore does not dry out. And finally, the rod need no longer be lengthy in order to reach the product in the bottom of the bottle, which makes it possible to use rather short rods, permitting greater precision in the application of the product.
The dosing device used may advantageously be that described in French Patent Application No. 91/03079, which corresponds to U.S. Ser. No. 07/816,767, filed by the applicants, which device, in addition to its efficiency, reliability and low cost, can be made in small size and therefore can be included in an external body the size of a pencil.
Several other embodiments of the present invention are possible, for example a tube having a telescoping rod which can be extracted by pressure exerted at the end of the tube. Pressing on the tube first of all creates the measured quantity and impregnates the brush with mascara, and then in a second stage causes the brush to be extracted from the tube.
Other features and advantages of the present invention will become apparent from the following description of preferred embodiments of the invention which refers to the accompanying drawings.
Brief Description of the Drawings
FIG. 1 is a view in longitudinal section of a first embodiment of an applicator tube in accordance with the invention.
FIG. 1a is a sectional view taken along the line 1a--1a in FIG. 1.
FIG. 2 is a longitudinal sectional view of a second embodiment of a tube in accordance with the invention, with a telescoping rod, shown in its closed position.
FIG. 2a is a longitudinal sectional view of the tube of FIG. 2, showing the tube extracted telescopically.
Detailed Description of Embodiments of the Invention
Referring to FIG. 1, it can be seen that an applicator tube in accordance with a first embodiment of the invention has a tubular outer body 1, one end of which is open and permits the introduction of a removable container 2, while the other end has a narrowing 10 of frustoconical tubular shape constituting a wiper.
On the outer body 1 there is fitted a cap 3 which is firmly attached to a rod 30, the end of which is provided with a brush 31, which may be a spiral brush, a sponge, or the like, as mentioned above.
The brush 31 is arranged within the outer body 1 below the wiper 10 in a longitudinally moveable part 4 which comprises a middle portion 40 which surrounds the brush 31.
The lower end of the part 4 has a tubular portion 41 which defines a cylindrical space 42 and which, together with a deformable part 5 made of elastomer, constitutes a dosing device such as that described in French Patent Application No. 91/03079, which corresponds to U.S. Ser. No. 07/816,767.
Thus, the piece 5, which has a generally cylindrical shape, includes two concentric tubular parts 50 and 51 connected by an annular side 52, the upper opening of the inner tubular part 51 being covered by a wall 53 pierced with orifices 54. The end of the tubular part 41 of the piece 4 is inserted between the two tubular parts 50 and 51 and bears against the annular side 52.
Referring to FIG. 1a, it can be seen that the middle portion 40 of the part 4 has longitudinal slits 44, making it possible for the inside of the portion 40, and therefore the brush 31, to communicate with the outer space 43 outside the tubular portion 41.
The applicator tube is used, after removal of the outer cap 11 covering the cap 3, by exerting pressure on the cap 3, which has the effect, upon the first use, of expelling the air present in the cylindrical space 42 and deforming the elastomer part 5. When the elastomer part 5 resumes its initial shape upon relaxation of the pressure, a vacuum is created which draws in the mascara contained in the container 2 and fills the cylindrical space 42.
When the cap 3 is pressed again, the mascara contained in the cylindrical space 42 spreads into the space 43, by passing through the slits 45 formed in the tubular part 41, and deforms the external tubular part 50. Then the mascara passes from the space 43, into the interior of the part 4, by passing through the slits 44, where it impregnates the brush 31, which can then be extracted, the wiper 10 eliminating the surplus mascara.
Referring now to FIGS. 2 and 2a, which show a second embodiment of the invention, it can be seen that the tubular portion 41 which forms part of the dosing device in association with the deformable elastomer part 5, is rigidly attached to the rod 30, but at the end opposite that having the brush 31. When pressure is applied to the container 2, the latter, in a first stage, pushes the rod 30 and causes the brush 31 to exit from the tube, and then, in a second stage, when the tubular portion 41 engages the sleeve part 4', the product contained in the cylindrical space 42 fills the inside of the portion 40' of the part 4'. Thus upon the reintroduction of the brush 31, the brush will be impregnated with a new dose of mascara and will be ready for use.
The extended brush 31 may be returned into the tube portion 40', after application of the mascara, either by pushing the brush 31 with the cap 11, or by pulling the container 2 out. As in the first embodiment, the mascara passes from the cylindrical space 42 to the space 43 through slots 45 provided in the tubular portion 41. After deforming the annular portion 50 of the deformable elastomer part 5, the mascara spreads in the space 43 from which it passes through slots 44 of the sleeve part 4' into the portion 40' to impregnate the brush 31.
Although the present invention has been described in relation to particular embodiments thereof, many other variations and modifications and other uses will become apparent to those skilled in the art. It is preferred, therefore, that the present invention be limited not by the specific disclosure herein, but only by the appended claims.