Patent Number: 6,308,704

Title: Process and apparatus for mixing cohesive powders

Abstract: The invention relates to a method of mixing cohesive finely divided powders such as finely divided powdered medicaments having a particle size less than about 10 .mu.m comprising the combination of a rotating/vibrating movement with a sieving procedure, wherein the method comprises the steps of adding a finely divided powdered mixture of substances to a perforated partition in a container, subjecting the container to a rotational and preferably vibrating movement in horisontal and/or vertical directions whereby the rotational movement is performed in intervals and whereby the container is turned in a vertical direction an angle of substantially 180.degree. during each turn. The invention also includes an apparatus for mixing finely divided powders to be used in the above mentioned method as well as the use of the method according to the invention for mixing cohesive finely divided powders.

Inventors: Wennerberg; Karin Gunilla (Lund, SE)

Assignee: Astra Aktiebolag

International Classification: B01F 5/24 (20060101); B01F 5/00 (20060101); B01F 9/00 (20060101); B01F 9/02 (20060101); B01F 11/02 (20060101); B01F 11/00 (20060101); A61M 015/00 (); B02C 007/00 ()

Expiration Date: 10/30/2018