Dispensing – Plural sources – compartment – containers and/or spaced jacket – With discharge assistant for each source
Patent
1989-12-22
1992-01-21
Shaver, Kevin P.
Dispensing
Plural sources, compartment, containers and/or spaced jacket
With discharge assistant for each source
2224021, B65D 8300
Patent
active
050821466
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a container that is for mixing and ejection of two components contained therewithin said container being for one-time use, and featuring a membrane arranged on the inside dividing the container into two chambers in which the components separately reside.
Certain products such as, for example, hair dyes or adhesives comprise two components that have to be stored separately and mixed only just before use. In general the mixing of the two components, contained in two individual packages, is performed by transferring the component in one package to the component in the other package, the package holding the second component of course having sufficient volume to accommodate both components and possibly additional free space to make the mixing process easier.
A container of the foregoing kind is known which is not under positive pressure and in which the individual components are separated from each other by an aluminum foil. The mixing of the components takes place by penetration of the foil that acts as a membrane, this by means of a shaped part that is coupled to the flexible bottom and can be actuated by pressure of the finger, thus causing the component in one chamber to enter the other chamber resulting in a mixing of the two components. The ejection of the mixture is performed likewise by pressure of the finger on the flexible bottom.
Such containers have the disadvantage that, in order to fit the membrane to the container it is necessary to have a projecting flange on the outside of the container; the flange produces a bad visual impression and, furthermore, uneconomically increases the volume of the packaging which normally encloses the container for mixing.
The object of the present invention is to eliminate this disadvantage and, usefully, to replace the moveable mechanical means for penetrating the present membrane.
This object is achieved by way of a container according to the invention. The container for one-time use for mixing and ejecting two components contained therewithin features a membrane that is situated inside the container and divides the container into two chambers in which the components separately reside, characterized in that, the container is a pressurized package with outlet valve, and the membrane in the interior of the container is sealed tightly to the inside of the container and designed such that by the introduction of pressure difference in the chambers a force is created that opens the membrane.
Advantageous further versions of the container according to the invention provide that the membrane is pot-shaped and is bonded adhesively with a ring-shaped seal to the inner wall of the container. Also in a further version, the pressure difference opens the membrane by peeling and/or inverting the part of the membrane in contact with the inner wall of the container, and the components of one chamber can gain access to the components of the other chamber. Also in a further version, the difference in pressure at a weakened zone opens the membrane at a predetermined place of rupture, and the components of one chamber can gain access to the components of the other chamber. In a further version, the difference in pressure pushes the bottom of the membrane against a stop, whereupon the membrane opens and the component of one chamber can gain access to the components of the other chamber. The membrane is made, in a conventional manner, of metal, of plastic, plastic-plastic composite or metal-plastic composite. In a further embodiment, there is a narrowing of the container in the region where the membrane is attached.
The container according to the invention is explained in greater detail by way of examples with the aid of the drawings in which
FIG. 1 shows schematically a container with pot-shaped membrane and,
FIG. 2 shows schematically a container with weakened zone as predetermined place of fracture.
As shown in FIG. 1 the container 10 according to the invention contains a pot-shaped membrane 20 that features an adhesive seam 21 on the side facing the inner wal
REFERENCES:
patent: 3630415 (1971-12-01), Morane et al.
patent: 3648899 (1972-03-01), Lukesch et al.
patent: 3727797 (1973-04-01), Cronan
patent: 4399158 (1983-08-01), Bardsley et al.
patent: 4518103 (1985-05-01), Lim et al.
patent: 4870805 (1989-10-01), Morane
Shaver Kevin P.
Swiss Aluminium Ltd.
Wunsch Shari
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