Title: Particles grader using gas current, method and apparatus for preparing colour material
Application Number: 89103336 Application Date: 1989.05.15
Publication Number: 1047228 Publication Date: 1990.11.28
Approval Pub. Date: Granted Pub. Date: 1996.04.03
International Classifi-cation: B02C19/06,B07B7/08
Applicant(s) Name: Canon K.K. Address:
Inventor(s) Name: Hitoshi Kanda
Attorney & Agent: ZHANG ZUCHANG
Abstract:
     This particles grader comprises following units: powder conveying pipe and particles grading chamber; guide chamber placed above the grading chamber and connected to said pipe; a group of leading-in grids placed between the guide and grading chambers, powder and air carrier are flowing from guide chamber into grading chamber through the opening between leading-in grids; inclined particles grading plate with convex in cente placed at the bottom of the grading chamber; particles grading grids are arranged along the side walls of the grading chamber, so a vortex formed by the air flowing through the openings between the grading grids to grade the powder (coming into the grading chamber with air carrier) into fine and coarse powders by centrifugal action; fine powder discharging holes are placed at the center of the grading plate; fine powder discharge slot is connected to these holes; and coarse powder discharging holes are arranged along the circumference of the grading plate.
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