Fluid handling – Processes – Cleaning – repairing – or assembling
Patent
1994-03-28
1996-04-09
Schwadron, Martin P.
Fluid handling
Processes
Cleaning, repairing, or assembling
137268, 134 93, B01F 312
Patent
active
055052231
DESCRIPTION:
BRIEF SUMMARY
This application is related to co-pending applications Attorney Dkt. No. D9530-I PCT/US, for DEVICE FOR PREPARING A STOCK WASHING LIQUOR"; and Attorney Dkt. No. D9530 -II PCT/US, for DEVICE FOR HOLDING A POWDER CONTAINER.
BACKGROUND
1. Field of the Invention
This invention relates to an apparatus for directly preparing a stock liquor from a powder container for supplying institutional dishwashing or washing machines, and to a method for directly preparing a stock liquor from a powder container for supplying institutional dishwashing or washing machines.
2. Discussion of Related Art
It is known that a stock liquor tank containing a detergent solution can be provided for supplying institutional washing or dishwashing machines with the detergent solution. The detergent solution is pumped as required from the stock liquor tank into the washing or dishwashing machines. To prepare the stock liquor from a powder or powder-form detergent, a metering unit is associated with the stock liquor tank. The powder is poured into the metering unit from a powder container or the powder container as a whole is introduced into the metering unit and slit open. Powder-form detergent is delivered in batches from the metering unit into a dispensing trough in which it mixes with inflowing water to form the stock liquor forming the detergent solution for the washing or dishwashing machine. The stock liquor is then directly introduced into the stock liquor tank. The detergent solution is removed from the stock liquor tank in accordance with the requirements of the particular washing or dishwashing process.
Filling the metering unit with the powder-form detergent is not without problems. It is frequently accompanied by dust emission which is unpleasant and a health hazard to the machine operator, particularly in the case of the strongly alkaline detergent powders typically used for dishwashing. Unwanted dust emission can occur both during the introduction of powder containers into the metering unit and during the pouring or scooping of powder from the container into the metering unit.
The holding capacity of known metering units for supplying known stock liquor tanks with powder-form detergent is typically 5 kg so that only 5 kg powder containers can be accommodated in the metering units. In addition, the powder is normally removed from the metering units and the powder/water mixture delivered to the stock liquor tank under the effect of gravity. Accordingly, the metering units are normally arranged above a stock liquor tank. This prevents the holding capacity of the metering units from being increased as required unless holders of complicated construction are provided for the metering unit.
SUMMARY OF THE INVENTION
The problem addressed by the present invention is to enable a stock liquor to be directly prepared from the powder container holding powder-form detergent without any dust emission and to keep the stock liquor ready for supplying institutional dishwashing or washing machines.
In an apparatus of the type mentioned previously, this problem has been solved in accordance with the invention by a type of conventional wet vacuum cleaner consisting of a tub-like lower part and--sealingly mounted thereon--an upper part with an integrated suction blower for generating a reduced pressure in the lower part of the stock liquor tank, a suction line leading into the stock liquor tank which, at its end remote from the stock liquor tank, dips into the powder in the powder container, a fresh water line which opens into the stock liquor tank, and of which the water outlet opening is directed onto a stream of powder to be drawn through the suction line and a stock liquor line operatively connected to a pump and leading out from the stock liquor tank with a stock liquor inflow at the bottom of the tank.
With the arrangement according to the invention, powder-form detergent can be directly transported from the powder container, which is also the retail container, into the stock liquor tank without any emission of dust. In the stock liquo
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Holz Peter
Rings Friedel
Henkel Kommanditgesellschaft auf Aktien
Jaeschke Wayne C.
Lee Kevin L.
Schwadron Martin P.
Szoke Ernest G.
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