Dispensing – With discharge assistant – With bypass or return to supply
Patent
1989-09-14
1991-05-14
Huppert, Michael S.
Dispensing
With discharge assistant
With bypass or return to supply
222377, 222380, 222504, 222510, 137862, 137872, B65D 8854
Patent
active
050148834
DESCRIPTION:
BRIEF SUMMARY
This invention relates to a paint toning machine comprising a plurality of color paste containers, a pump for each paste container for pumping color paste for the dispensing and circulation thereof, and a dispensing valve attached to each pump for dispensing a desired amount of color paste.
A paint toning machine of the above type is known e.g. from Australian Patent Specification 162 212. Therein the dispensing valves are positioned on the circumference of a semicircle so that the desired dispensing valve can be turned above a paint pot containing paint to be toned for dispensing. Thus the dispensing valve is positioned relatively far from the dispensing pump positioned in the vicinity of the color paste container, wherefore it has to be provided with rather long hose connections for a color paste dispensing conduit and a return conduit. The color paste normally circulates in the dispensing and return conduits so that it is mixed and stays homogeneous, and the dispensing is carried out by controlling the dispensing valve, whereby the color paste can be passed from the dispensing conduit to the dispensing nozzle. A problem with this kind of arrangement, however, is that the couplings of the hose connections to the dispensing valves as well as the structure of the dispensing valve itself are liable to leakage, especially in cases where the color paste is solvent-diluted, whereby it penetrates extremely easily even through minor gaps. Such leaks may result in operational disturbances in the dispensing valve, and they may even cause the color paste to be dried either in the valve or in the dispensing and return conduits attached thereto so that the conduits may clog.
The object of the present invention is to eliminate the problems possibly caused by such leaks. A paint toning machine according to the invention by means of which this object can be achieved is characterized in that the dispensing valve is arranged in the paste container in the vicinity of the bottom thereof essentially below the surface of the color paste contained in the container.
By immersing the dispensing valve in the color paste, problems caused by possible leaks in the valve can be fully eliminated. The immersion of the valve in the color paste is preferably carried out in such a manner that a drive shaft of the dispensing valve projects outside the paste container preferably through a hole formed in the cover of the paste container. In this way, the operating means of the dispensing valve can be positioned outside the paste container, so that it can be completely conventional in structure.
In a preferred embodiment of the invention, the dispensing valve comprises a valve spindle having a first conical surface for closing a paste circulation conduit and a second conical surface for closing a paste dispensing conduit, whereby a counter surface for the first conical surface is formed in a floor positioned above the bottom of the paste container, and a counter surface for the second conical surface of the spindle is formed in the bottom of the paste container, whereby a paste feeding conduit connected to the dispensing valve is positioned between the bottom and the floor. In this way the dispensing valve and the paste dispensing and circulation conduits attached thereto can be formed by means of the paste container and other structural parts which are simple and inexpensive to manufacture. The drive shaft of the dispensing valve is vertical and so positioned that it goes through the floor via the paste circulating conduit. Thus the dispensing valve merely requires a short to-and-fro movement for the operation thereof, and this can be effected simply by means of e.g. a magnetic operating means provided with a return spring.
In the following the paint toning machine according to the invention will be described in more detail with reference to the attached drawing, wherei n
FIG. 1 shows a cross-section of one paste container of the paint toning machine according to the invention, and
FIG. 2 shows a section of the paste container of FIG. 1 alon
REFERENCES:
patent: 1992736 (1935-02-01), Bronander et al.
patent: 2545588 (1951-03-01), Pulse
patent: 2566702 (1951-09-01), Harrigan
patent: 2652175 (1953-09-01), Davis
patent: 2660336 (1953-11-01), Coffey et al.
patent: 3042259 (1962-07-01), Engel
patent: 3168225 (1965-02-01), Miller et al.
patent: 3459340 (1969-08-01), Smith
patent: 3807607 (1974-04-01), Kuckens
patent: 4363426 (1982-12-01), Heinzl
patent: 4708269 (1987-11-01), Willerding
Cimcorp Oy
Huppert Michael S.
Huson Gregory L.
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