Carrier powder coating process

Details Carrier powder coating process Carrier powder coating process

G - Physics

03

G

96/53

G03G 9/10 (2006.01) G03G 9/113 (2006.01)

Patent

CA 1129701

ABSTRACT OF THE DISCLOSURE Electrostatographic coated carrier particles for use in the development of electrostatic latent images are provided by mixing carrier core materials with powdered thermoplastic resin particles having a size of between 0.1 micron and about 30 microns. The carrier core materials are mixed with the resin particles until the resin parti- cles mechanically and/or electrostatically adhere to the core materials and the mixture is heated to a temperature of between 320°F and 650°F for between 120 minutes and 20 minutes so that the resin particles melt and fuse to the carrier core materials. The coated carrier particles are cooled, classified to the desired particle size, and mixed with finely-divided toner particles to form a developer mixture. The process is especially advantageous for coat- ing carrier particles with resin materials having poor solubility characteristics.

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