Double dispenser for fluid products

A double dispenser for fluid products, comprising, in a single casing (1), two chambers (2) filled with different fluids and each closed by a pump (3) provided with a valve, the two valves being actuated by a single pusher (5). The pusher (5) has a chamber into which open the outlets of the two valves. This chamber is divided by a wall (7) so as to form two separate chambers (6', 6") into which open respectively the outputs of the two valves. The wall (7) has two outlet openings (8', 8") respectively connected to the separate chambers (6', 6"). These outlet openings (8', 8") open into cavities (10', 10") of a dispensing nose (11) of elastically deformable material. The dispensing nose (11) has an outlet slot (12) sealingly closed by two lips (13) arranged to spread under the pressure of the mixed fluid arriving respectively in the cavities (10', 10") during depression of the pusher (5). The dispensing nose (11) comprises an intermediate partition (14) separating the cavities (10', 10"). This intermediate partition (14) is made of a single piece with the dispensing nose (11).

The invention relates to a double dispenser for fluid products of the type 
comprising, in a single casing, two chambers filled with different fluids 
and each closed by a pump provided with a valve, the two valves being 
actuated by a common pusher, said pusher being provided with a chamber 
into which open the outlets of the two valves and which comprises an 
outlet opening for the mixture of the fluids. 
These dispensers are generally used for creamy, liquid or pasty cosmetics 
and have the advantage that the mixture of the fluid products takes place 
before expulsion, such that the mixed product has the appearance of a 
single product at the outlet. 
Most of these dispensers however have the drawback that the mixing chamber 
is open to ambient air and that the mixture which remains after one 
expulsion and until a following expulsion is subject to oxidation, which 
is undesirable even for pure products but, in the case of a mixture of two 
pure products, can give rise to chemical reactions between the components. 
There is known from FR-A-2,650,562, a double dispenser comprising an outlet 
opening for the products, sealed from air other than during dispensing, 
but in which the two products are expelled by means of two parallel 
channels up to the outlet, and, as a result, without mixing said products. 
There is also known, from EP-A-0.598.637 of the applicant, a 
mixer-dispenser with variable dosage permitting the dispensing of a 
mixture of products in different proportions. This dispenser has an outlet 
valve sealed from the air at the point where mixing of the products takes 
place. However, although the sealing is effected within the mixing chamber 
thereby avoiding oxidation of the products, a degradation of the products 
can result from the instability of the mixture obtained which can arise 
and can cause as a result pollution during further dispensing. 
The present invention has for its object to overcome these drawbacks of 
known pumps. 
To this end, the dispenser according to the invention comprises in a single 
casing, two chambers filled with different fluids and each closed by a 
pump provided with a valve, the two valves being actuated by a single 
pusher, said pusher being provided with a chamber into which open the 
outlets of the two valves, said chamber being divided by a wall so as to 
form two separate chambers into which open respectively the outlets of the 
two valves, said wall comprising two outlet openings connected 
respectively to said separate chambers, said outlet openings opening 
respectively into cavities of a dispensing member of an elastically 
deformable material, said dispensing member comprising an outlet slot 
closed in a sealed manner by lips arranged to spread under the pressure of 
the fluid arriving respectively in the cavities during depression of the 
pusher, characterized in that the dispensing member comprises an 
intermediate partition separating the cavities. 
With a dispenser according to the invention, the mixture of the two fluids 
no longer takes place before expulsion but at the very moment of this 
expulsion, during passage through the outlet slot, such that the fluids 
remaining in the different channels after dispensing of mixed product are 
shielded from the air. 
The intermediate partition is preferably formed from a single piece with 
the dispensing nose. 
The wall is formed of one piece with the pusher and in particular it can be 
adjusted and welded to this latter. 
It also extends in a preferred manner from the chamber that it divides into 
two separate chambers, to the cavity of the dispensing member, such that 
the mixture of the two fluids takes place only at the moment of expulsion 
of the fluids. Thus, in the case of two fluids which are not sufficiently 
stable when mixed with each other, the double dispenser according to the 
invention permits keeping the two fluids separate thereby avoiding any 
risk of any loss of effectiveness of the fluids.

The double dispenser comprises a casing 1 containing two reservoirs 2 which 
are totally independent from each other and can enclose different fluids; 
each reservoir 2 is provided with a pump 3 provided with a valve for 
simultaneous actuation with the other valve by a single pusher 5. 
A dispensing member or nose 11 is mounted on said single pusher 5 and has 
an outlet slot forming two dispensing lips 13 which are provided to be 
able to separate elastically from each other under the pressure of the 
mixed fluid to be dispensed. 
Preferably, the dispensing member is of an elastically deformable material 
and to this end is constituted by an injection-molded thermoplastic 
material having suitable elastic properties to ensure the elastic 
deformation of the lips 13 of the outlet slot of the nose 11. 
The lips 13 ensure that the product remaining within the nose 11 is 
sheltered from the air and hence from any oxidation. 
According to the invention, the outlets of the valves of the pumps 3 open 
into a chamber 6 of the single pusher 5 having a wall 7 dividing said 
chamber 6 into two chambers 6' and 6" receiving the respective fluids. 
Thus, when pressure is exerted on the single pusher 5, the two different 
fluids are brought in a separate manner to the chambers 6' and 6". 
The wall 7 of the chamber 6 is preferably so formed as to have two outlet 
orifices 8' and 8" corresponding respectively to the chambers 6' and 6" 
and conducting the fluids separately into the cavities 10' and 10" 
respectively of the dispensing nose whence the two fluids are expelled in 
the form of a mixed fluid by the same and single outlet slot 12. The 
cavities 10' and 10" are separated by an intermediate partition 14 which 
is of one piece with the dispensing nose.