The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 09, 2005
Filed:
Jan. 21, 2000
James D. Brown, London, CA;
Paul F. Wynen, London, GB;
Thomas E. Doyle, Oshawa, CA;
The University of Western Ontario, London, CA;
Abstract
An apparatus for tribocharging particles of electrically insulating materials has a rotatable drum (), made of a metallic material, for containing the particles. The drum has an inlet (), for charging material, and an outlet (), for discharging material. The drum further has means () for rotating the drum about an axis of rotation, the orientation of the axis of rotation being such that, in operation of the apparatus, the particles tumble against each other and against the walls of the vessel, thereby becoming tribocharged. A fines removal mesh screening means () is attached to an outer surface of the drum, allowing fines to escape from the drum. An electrostatic separation tower (), having tapering walls and at least one pair of electrodes () arranged on opposite walls of the tower, is aligned to receive discharged material from the drum. The tower separates the particles, falling from the drum into the tower (), in an electric field generated between the electrodes ().