Patent ID: 6308704
Filing Date: 2001-10-30
Classification: B01F

Abstract:
A method of mixing at least two initially unmixed cohesive finely divided powders having a particle size less than about 10 .mu.m, which method comprises:providing a mixing device comprising a container that is closed during operation, the container having at least two compartments separated by at least one perforated partition and means for forcing a powder through the perforated partition;placing the unmixed powders in said mixing device;subjecting the mixing device to a rotating movement; andperiodically stopping the rotating movement of the container, and forcing the powders from one compartment through the at least one perforated partition into the at least one other compartment, wherein, in addition to the rotating movement, the container before, during or after rotation is subjected also to a vibrating movement in both the vertical and horizontal directions of the container.