MISCH- UND ABGABEVORRICHTUNG FÜR FLÜSSIGKEITEN

摘要

A liquids mixing and dispensing apparatus and method utilize a plurality of liquid supply modules to feed simultaneously charges of a plurality of admixable liquids at predetermined volume flow rates to a mixer to form a batch of a mixture of the liquids, such as a photographic emulsion mixture, in which the liquids are in a predetermined volume ratio. As it is formed, the mixture is delivered to a storage conduit connected to a dispenser, for later dispensing of a discrete volume thereof as a coating onto a moving web by feeding a purge liquid to the mixer. Each module has a piston and cylinder unit with an inlet and outlet (a cylinder port conduit) connected to one end of a tube having a volume at least as large as the maximum volume of the cylinder swept by its piston when driven by an associated motor. A valve selectively connects the other end of the tube either to a liquid source or to the mixer. The ratio of the intermediate or maximum volumes swept by the pistons when concordantly driven by their motors is selected to provide the desired volume ratio of the liquids in the mixture.