Dispensing – Plural sources – compartment – containers and/or spaced jacket – With discharge assistant for each source
Reexamination Certificate
2000-12-18
2001-10-23
Derakshani, Philippe (Department: 3754)
Dispensing
Plural sources, compartment, containers and/or spaced jacket
With discharge assistant for each source
C222S145500, C239S306000
Reexamination Certificate
active
06305578
ABSTRACT:
The invention relates to a compressed gas container apparatus.
From German Patent Disclosure DE 37 29 491 Al which defines this generic type, a compressed gas container apparatus is known, having at least two compressed gas containers, disposed side by side, each for one foamable liquid product which contains a liquidfied propellant gas, wherein both compressed gas containers are each provided with a valve. Both valves are actuatable in common by a top fitting, and each valve is provided through the top fitting with a connecting conduit. The connecting conduits discharge into a mixing chamber, and an expansion conduit adjoins the mixing chamber and on its end has a foam dispensing opening.
This apparatus has the disadvantage that the dispensed foam comprising the two products is not optimally (homogeneously) mixed. This is because the products even as they emerge from the product dispensing valves foam up and are discharged in unmixed foam form into the mixing conduit through the connecting conduits. In the mixing chamber as well, the two foam components flow more or less side by side, and a passive mixing device is therefore adjoined to the mixing chamber in order to achieve further, but still inadequate, mixing of the two foam components.
The object of the invention is to create a compressed gas container apparatus of this same generic type, with which by simple provisions, substantially improved homogeneity of the two products in the dispensed foam is achieved.
This object is attained in accordance with the body of claim
1
. Further advantageous features of the invention are recited in the dependent claims.
Because the connecting conduits and the mixing chamber have such small cross-sectional areas that when a product is dispensed, the products flowing through the connecting conduits and the mixing chamber remain in a liquid phase, optimal mixing (homogeneity) of the two liquid products in the mixing chamber is achieved, and as a result, after the expansion of the mixed liquid, an optimally mixed foam results. Accordingly it is not the foam that is mixed but instead, mixing is done extremely effectively in the still-liquid phase of the products, before foaming occurs.
A further improvement in the mixing of the two liquid products is attained in that connecting conduits discharging into the mixing chamber are oriented at an angle of approximately 180° from one another.
It is advantageous if the connecting conduits have a diameter of approximately 0.6 mm and the mixing chamber has a diameter of from 0.4 to 1.2 mm—preferably approximately 0.6 mm—and as a result the products then still remain in a liquid phase and as a result are optimally mixed. This is important and advantageous in terms of the fact that products that have already foamed up can be made to mix only poorly. Optimal mixing of both products in foam form is especially important for example in foam products for hair treatment, especially a foam dye composed of one peroxide component and one colorant component, since the quality of the dye product depends on the quality of the mixed products.
By means of an impact part disposed oriented toward the mixing chamber disposed in the beginning region of the expansion conduit, an additional mixing of the mixed products is achieved.
Depending on the embodiment of the impact parts (as a disk, concave, and/or with a relatively raw surface), the mixing process of the liquids can be still further optimized.
A dam chamber or an annular chamber, each of which interrupts a connecting conduit, has the function of a retention filter for solid product components (solid particles) that have formed, for instance from crystallization.
Because the mixing chamber with mixing chamber orifices is provided as an insert part into the top fitting, there is the advantage of a simple tool for producing the top fitting and the advantage of an adaptation of the cross section of the mixing chamber orifices and the mixing chamber, so that a targeted adaptation to various product viscosities and various propellant gas pressures can selectively be made.
In a further embodiment of the insert part, it is advantageously provided that the dam chamber (annular chamber) is formed by the insert part, and as a result, in addition, the required dam chamber volume can be predetermined.
REFERENCES:
patent: 3236457 (1966-02-01), Kennedy et al.
patent: 3303970 (1967-02-01), Breslau et al.
patent: 3451593 (1969-06-01), Dillarstone
patent: 3825159 (1974-07-01), Laauwe
patent: 5169029 (1992-12-01), Behar
patent: 5270014 (1993-12-01), Bauer
patent: 5330724 (1994-07-01), Bauman
patent: 5874024 (1999-02-01), Knaus
patent: 37 29 491 A (1988-03-01), None
patent: 1 302 577 A (1973-01-01), None
patent: 92 14595 A (1992-09-01), None
Burghaus Johannes
Eberhardt Heiko
Hildebrandt Bodo
Kohn Udo
Mayer Joerg
Bui Thach H
Derakshani Philippe
Striker Michael J.
Wella Aktiengesellshaft
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