Device for dosing products in past form, in particular meat or o

Details Device for dosing products in past form, in particular meat or o Device for dosing products in past form, in particular meat or o

1991-07-31

1992-12-22

Shaver, Kevin P.

Dispensing

With discharge assistant

With material supply container and discharge assistant with...

222387, B67D 540

Patent

active

051728354

DESCRIPTION:

BRIEF SUMMARY
FIELD OF THE INVENTION

The present invention relates to a device for metering of pasty products and more particularly to a devise for the metering of emulsions of meat or other proteins packed in containers such as cans or troughs.


BACKGROUND OF THE RELEVANT ART

As background, as used herein, the term "pasty products" is defined as a product capable of forming an adherent mass, but whose consistency nevertheless allows it to be pumped. In other words, a pasty product exhibits coherent mass flow when a pressure is applied to it, either mechanically (such as, the action of a plunger) or pneumatically (such as, by pressurizing of a vessel).
When filling containers with a pasty product, it is extremely desirable to develop a system wherein the container is filled cleanly with the pasty product and the pasty product is precisely metered into the container.
First, it is desirable to fill the container cleanly without soiling its edges. Maximum cleanliness along the closure zones of the container, in turn, maximizes the leakproofness of the container, particularly in the case where this closure is effected by heat sealing.
This requirement leads to particular difficulties if the pasty product is of fibrous texture, which further increases the volume of product capable of adhering to the metering head. In this situation the fibres hanging from the metering head are capable of soiling the closure zones of the container as it arrives and departs.
Second, the greatest possible metering precision is desirable in order to ensure as complete a filling as possible of the container with the minimum residual volume or space from the closure head.
In order to ensure a precise metering, the prior volumetric metering devices typically end of a metering plunger sliding in a cylinder connected, on the one hand, to a supply conduit communicating with a pressurized chamber containing the pasty product and, on the other hand, to a delivery conduit permitting delivery of the metered product towards the container.
Systems of valves placed on the supply conduit and on the delivery conduit ensure correct order of the pumping phases (filling/delivery) in synchrony with the movement of the plunger.
In order to achieve clean filling, in prior metering devices for pasty products, a cutting system, for example a guillotine, is provided at the outlet of the delivery conduit. Such a cutting system permits the metered portion to be separated from the dead volume of product remaining in the delivery conduit and in the metering cylinder.
In addition to its mechanical complexity (valves to synchronize with the movement of the plunger, guillotine system, etc), the prior system has the disadvantage of always leaving a dead volume where the product is capable of accumulating. For this reason, this dead volume risks damaging the biological quality of the product being metered because of the possible development of germs therein.


OBJECTS OF THE INVENTION

Therefore, it is an object of the present invention to provide a device for metering of a pasty product which avoids the aforementioned disadvantages of the prior art.
Another object of the present invention is to provide a volumetric metering device which is mechanically very simple and, in particular, does not employ valves in the supply and delivery conduits, as well as a guillotine in the final cutting device.
A further object of the present invention is to provide a device for metering of a pasty product which; totally omits the dead volume of the distribution system.
Another object of this invention is to provide a device for metering of a pasty product which is designed so that a portion of product pumped into the cylinder is entirely and directly delivered into the container, thereby simultaneously providing for the precise metering and the desired elimination of dead volumes.
An additional object of this invention is to provide a device for metering a pasty product which simply protects the closure zones of the container from any possible trace of product which would be hanging over t

REFERENCES:
patent: 2070841 (1937-02-01), Reade et al.
patent: 2202073 (1940-05-01), Wollenweber
patent: 2356420 (1944-08-01), Monroe
patent: 2684186 (1954-07-01), Mattos
patent: 3731715 (1973-05-01), Gageant et al.
patent: 4055281 (1977-10-01), Rosen et al.
patent: 4684040 (1987-08-01), Jonovic et al.

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