Apparatus for Separating a Mixture of Granular or Comminuted Materials by Air Suspension

Author:  William H. Mead ET AL
Source:  US Patent 2,635,745
Doc ID:  1947008
Year of Publication:  1947
Abstract:  
This invention relates to an apparatus for separating into its components a continuously circulating mixture of two or more granular or comminuted materials, some of which have different specific gravities.