High surface area ferromagnetic carrier materials

Details High surface area ferromagnetic carrier materials High surface area ferromagnetic carrier materials

1977-02-11

1978-11-14

Smith, John D.

Stock material or miscellaneous articles

Coated or structually defined flake, particle, cell, strand,...

Particulate matter

96 1SD, 427 18, 427221, 252 621P, 252 6251, 252 6253, 252 6254, 252 6255, 252 6256, 428405, 428407, 428546, 428611, 428402, G03G 902

Patent

active

041256670

ABSTRACT:
Classified high surface area carrier materials having a specific surface area of at least about 150 cm.sup.2 /gram, a particle size volume distribution geometric standard deviation of less than about 1.3, and a particle size distribution wherein the carrier particles have an average particle diameter of less than about 100 microns. The carrier materials are mixed with finely-divided toner materials to form electrostatographic developer mixtures.

REFERENCES:
patent: 3838054 (1974-09-01), Trachtenberg et al.
patent: 3839029 (1974-10-01), Berg et al.
patent: 3847604 (1974-11-01), Hagenbach et al.
patent: 3895125 (1975-07-01), Tsuchiya et al.
patent: 4040969 (1977-08-01), Jones

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