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Publication of GB248082ApublicationCriticalpatent/GB248082A/en
248,082. Clause, F. H. Nov. 28, 1924. Washing - apparatus with screens. - Larger grains are separated from smaller grains of powders by passing the powder through a sieve immersed in a comparatively large tank filled with liquid, and rotating the liquid within the sieve. The apparatus may comprise a cylindrical sieve 2 mounted within a tank 1, and paddles 4 for rotating the contents of the sieve 2. The paddles and the walls of the sieve 2 are preferably close together and the distance between the walls of the tank 1 and the walls of the sieve 2 should be greater than half the diameter of the sieve. Specification 15514/13, [Class 117, Sifting &c.], is referred. to.