Process for producing toner powder from a dispersion of...

G - Physics – 03 – G

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G03G 9/08 (2006.01) G03G 9/09 (2006.01) G03G 9/097 (2006.01)

Patent

CA 1079562

Abstract of the Disclosure Toner powders are used for developing electrostatic images formed in electrophotographic copying processes on a photoconductive surface. This invention is an improvement over toner powders consisting of hollow, spherical particles with a low mechanical resistance obtained by spraying a melt or solution through a complex apparatus. The present invention relates to a toner powder consisting of solid, spherical or almost spherical particles containing thermoplastic resin and hydrophobic silica, that satisfies high requirements as to quality making it particularly suitable for use in high speed indirect electrophotographic processes; as well as to a simple process using simple apparatus to produce such a toner powder.

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