Process and apparatus for separating aspherical particles from s

Details Process and apparatus for separating aspherical particles from s Process and apparatus for separating aspherical particles from s

1974-10-31

1976-09-07

Reeves, Robert B.

Classifying, separating, and assorting solids

Electrostatic

209116, B07C 900

Patent

active

039789861

ABSTRACT:
Disclosed is a process and apparatus for separating aspherical particles from spherical particles in an admixture thereof, preferably in the preparation of a particulate carrier material for two-component developer systems for electrostatic copy devices. The process comprises directing the mixture of particles onto a surface which is inclined with respect to the horizontal; producing a relative velocity between the inclined surface and the mixture of particles, the velocity having a directional component transverse to the steepest inclination gradient of the inclined surface; and collecting a portion of the mixture of particles in a zone of the inclined surface wherein predominantly spherical particles have accummulated as a result of their greater tendency to roll in response to the relative velocity than the aspherical particles.

REFERENCES:
patent: 977956 (1910-12-01), Langerfeld
patent: 1094621 (1914-04-01), Ayres
patent: 1292820 (1919-01-01), Lindsley
patent: 1315880 (1919-09-01), Sutton
patent: 2658616 (1953-11-01), Stutzman

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