Method for mixing and dispensing oxygen degradable hair dye concentrates
AssigneeBritsol-Myers Squibb Company
InventorsThomas F. Wiegner, Jack Massoni
Life of this patent
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Abstract
A system for mixing and dispensing oxygen sensitive hair dye consists of concentrates in a sealed air-tight system using preferably 3--8 dye concentrates in collapsible bags having an oxygen barrier. The dye concentrates, along with oxygen activating liquids, are sufficient to produce an infinite number of hair dye formulations, thereby avoiding buying and stocking many bottles of specific color dyes. For formulating the dye mixtures, exact charges, i.e., volumes measured to within 1 ml, are raised from the bags and discharged. Each bag is removably connected, in an air-tight seal, to a separate precision lift pump whose piston lift excursion may be selectively set to determine the volume of the dye charge.
Claims5
A method for the mixing and dispensing of hair dye formulations, without the use of an inert gas, including:
- (a) positioning proximate each other a plurality of collapsible containers substantially impervious to oxygen and collapsible by atmospheric pressure, each collapsible container containing a different oxygen degradable hair dye concentrate;
- (b) positioning, next to the collapsible containers, at least one separate container containing an alkalyzer liquid to be added to a charge of hair dye concentrate from one or more of the collapsible containers to produce a hair dye formulation;
- (c) connecting a precision pump to each of the containers, each pump functioning to draw liquid from its connected container;
- and
- (d) pumping 65-85% of hair dye concentration from at least one collapsible bag and 35-15% of the alkalyzer liquid from the container containing said alkalyzer liquid into a receptor container and mixing the hair dye concentrate and alkalyzer liquid in the receptor container to form the hair dye formulation.
Dependencies are inferred from the claim text.