Proportioning device for double dispenser

A proportioning device for a double dispenser has a double receptacle and a dispensing head (1), the device having, facing outlet openings (6) for the products, openings (5) of different or equal diameters. The proportioning device has a capsule (2) screwed on the dispensing head (1), having a constriction (3) holding a disk (4) having at least one pair of openings (5) of different or equal diameters which are diametrically opposed. The capsule (2) and disk (4) are covered by a ring (8) driving the disk (4) in rotation the disk (4) by teeth on the external periphery of the disk meshing with teeth on the internal surface of the ring. Use for the distribution of liquid or pasty cosmetic products.

BACKGROUND OF THE INVENTION 
1. Field of the Invention 
The present invention relates to a proportioning device for a double 
dispenser, in particular for the dispensing of cosmetic products. 
2. Description of the Related Art 
In the field of cosmetics in particular, there is an increasingly frequent 
use of receptacles enclosing two active principal ingredients. Most of the 
time, when these products cannot be stored in the form of a mixture, 
double dispensers have been separately provided to enclose the two 
products. Their contact and/or mixture takes place, in this case, only at 
the time of simultaneous distribution of the two products. 
This double dispensing of liquid or pasty products can be carried out in 
various ways. Thus, it can be considered that the two products can be 
distributed in parallel streams when it is not sought to mix them 
together, or on the contrary in mixed streams or again the two products 
can be dispensed in two different proportions, which is to say with 
different flow rates. 
In this case, it is therefore necessary to be able to vary the flow rate of 
one of the products relative to the other. 
DE-A-2.444.227 discloses a double dispenser with concentric compartments, 
provided with a distributor cap beneath which are disposed a first cover 
provided with a series of openings of different diameters for the first 
compartment and a second cover provided with openings of different 
diameters for the second compartment. The positioning of the open openings 
of the compartments takes place by rotation of the covers connected to 
each other. However, this type of dispenser is not satisfactory because it 
relies on a construction comprising concentric compartments and two 
covers, which implies a complicated and costly production. 
It is accordingly desirable to provide a dispensing device permitting 
varying the distribution flow rates of the products enclosed in a double 
dispenser with adjacent compartments. 
For this purpose, the invention equips a dispensing head of a double 
dispenser with a proportioning device comprising, facing outlet openings 
of the two products, openings of different or equal diameters, 
characterized in that said device comprises a capsule fixed, for example 
by screwing, on the dispensing head, this capsule having a constriction 
adapted to receive an open disk comprising at least one pair of said 
diametrically opposed openings of different or the same diameters, said 
capsule and said disk being covered by a ring turning about the capsule 
which drives the disk in rotation. 
Preferably, the disk is open, which facilitates its molding and its 
assembly. 
The disk preferably comprises at least one pair of openings on the surface 
of the disk and of different diameters, the disk being then positioned 
such that one of the openings will face the outlet opening of the second 
product, thereby adjusting the flow rate of the two products in a 
differentiated manner. 
Preferably, the ring drives the disk in rotation by means of teeth on its 
outer periphery, which teeth match the teeth on the ring. 
The ring preferably has in its lower portion an indexing system to allow 
the adjustment, by simple rotation of the ring, of the caliber of the 
outlet openings of the two products enclosed in the double dispenser. 
During emplacement of the different elements, the ring is carefully 
positioned on the capsule and the disk as a function of the type of 
indexing selected. 
There is thus obtained a double dispenser in which the outlet flow rates of 
the two products can preferably be selected to be different from each 
other according to their proportion and according to the intended use. 
The device of the invention is simple and easy to produce and moreover 
permits, by the presence of several pairs of openings on the disk, several 
choices as to flow rates to be used.

DESCRIPTION OF THE PREFERRED EMBODIMENT 
A capsule 2 is fixed on a double dispensing head 1 of a receptacle (not 
shown) by screwing. The capsule 2 is made such that its securement on the 
dispensing head 1 will be sealed. Any other suitable securement mode could 
be used. Said capsule 2 also has a constriction 3 which receives a disk 4. 
Said disk 4 has, on its surface, diametrically opposed pairs of openings 5 
of different diameters which, during emplacement of the disk 4, come to 
face the outlet openings 6 in the dispensing head 1 for the products 
contained in the receptacle. 
In the example described, the dispensing head 1 has a screw-threading 7 on 
which can be screwed the capsule 2 which has a corresponding tapping. 
Then, on the two members, meaning the dispensing head 1 and the capsule 2, 
there is fitted a locking ring 8 which has teeth on its internal surface 
which correspond to the teeth 9 of the disk 4, so as to form an indexing 
system. 
The disk 4 has several pairs of diametrically opposed through openings 5 of 
different diameters. Each pair of openings 5 allows the production of 
different flow rates between the two products contained in the receptacle, 
or allows equal flow rates, if the openings 5 have the same diameter. 
A simple rotation of the ring 8 allows a modification of the flow rate of 
the products, the ring 8 driving the rotation of the disk 4. As a result, 
the rotation of the ring 8 permits changing of the openings 5 of the disk 
4 facing the outlet openings for the products. 
Preferably, the disk is made open, which is to say it opens in two parts 
about a bend line 11 so as to be adapted for the constriction 3 of the 
capsule 2. The ultimate emplacement of the gripping and locking ring 8 
maintains it closed. The disk 4 also comprises a flat surface 10 (shown in 
phantom line) corresponding to a closed position of the dispensing head. 
The proportioning device according to the invention is preferably adapted 
for double dispensing heads of receptacles for cosmetic products but can 
be also used in all fields which use the double dispensing of liquid or 
pasty products as for example the field of glues.