Multiple component metering and relative proportioning device wi

Details Multiple component metering and relative proportioning device wi Multiple component metering and relative proportioning device wi

1995-04-19

1997-07-15

Derakshani, Philippe

Dispensing

Collapsible wall-type container

Plural container and/or compartment

222 95, 222105, 222136, 222389, B65D 3522

Patent

active

056475101

DESCRIPTION:

BRIEF SUMMARY
FIELD OF THE INVENTION

The present invention is related to a multiple component metering and relative proportioning device, comprising a collapsible cartridge, wherein at least one collapsible receptacle containing one component is located within or adjacent a second collapsible receptacle containing another component.
The now well established field of the use of two and more reactive chemical components which must be separately metered and proportioned at predetermined relative ratios and then mixed together has required the development of corresponding devices. Such chemical systems, including epoxide, polyisocyanates, silicone and polyester resins at the one hand and their hardeners or catalysts, on the other hand, are widely used as adhesives, sealants, coatings, molding materials, insulating foams, etc.


BACKGROUND OF THE INVENTION

Several forms of two component devices exist, comprising more than one receptacle, the most common of which is the side-by-side device. Such cartridges cause a disposal problem as they are rigid and bulky, and there is a substantial waste of plastics material.
There is a still increasing need for packaging, dispensing and applying such systems in an environmentally most friendly manner, as well as for the most reliable, efficient and cost effective way. Attempts have been made to use foil laminates as packaging media for single or two-component liquids. These packages will collapse inside a cylinder during dispensing and are compressed to a minimum size.
One example of it is disclosed in the WO-91/07333 which shows also two-component coaxially arranged bag cartridges with separate outlets united in one outlet. However no means for dispensing the content of the bags are disclosed. The EP-A-0 541 972 discloses a container with two side-by-side arranged sausage-type foil bags each having an outlet ending in one common outlet. The contents are pressed out by two pistons, each piston acting upon a ring.
However, until now, such cartridges have failed to gain much importance because their operation is unreliable, not user friendly, and the cartridge contents contaminate the device when replacing as well as making it messy for the operator.
Based on this prior art, it is an object of this invention to provide a multiple component, in particular a two-component metering and proportioning device which substantially reduces the problem regarding the disposal of the used cartridges and which allows a reliable, efficient and cost effective operation without contamination of user, and re-usable cartridge and dispensing equipment.


SUMMARY OF THE INVENTION

This objective and still others which will become apparent from the following description is attained by a device as described above wherein the receptacles are package assemblies which are collapsible and located in a housing, each package assembly having an individual outlet at one end, all individual outlets being joined in a common outlet piece, said package assemblies being sealed at their other end where a piston is disposed in said housing for progressively collapsing the package assemblies during its stroke, the contents of the package assemblies being discharged through their outlet end in their predetermined relative proportions.
Preferred embodiments of the device according to the invention as well as their advantages will become apparent from the following description and the drawings.


BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 shows a longitudinal sectional view of a first embodiment of a device according to the invention,
FIG. 2 shows an alternative detail of the device of FIG. 1,
FIG. 3 shows a detail of the invention,
FIG. 4 shows a detail of an alternative of the device of FIG. 3,
FIG. 5 shows a longitudinal sectional view of a second embodiment of a device according to the invention, with rear attachment so as to form a pneumatic dispenser,
FIG. 6 shows the device of FIG. 5 disposed within the front part of a dispenser,
FIG. 7 shows a longitudinal sectional view of a third embodiment of a device according to the

REFERENCES:
patent: 2671579 (1954-03-01), Knoblock
patent: 4340154 (1982-07-01), Van Manen
patent: 4690306 (1987-09-01), Staheli
patent: 4760937 (1988-08-01), Evezich
patent: 4801046 (1989-01-01), Miczka
patent: 5332122 (1994-07-01), Herold et al.
patent: 5386928 (1995-02-01), Blette

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