Preparation method of magnetic toner

Details Preparation method of magnetic toner Preparation method of magnetic toner

1981-10-01

1984-11-13

Welsh, John D.

Radiation imagery chemistry: process, composition, or product th

Electric or magnetic imagery, e.g., xerography,...

Process of making developer composition

324 62, 324 65R, 324158P, G03G 914

Patent

active

044826230

ABSTRACT:
The invention involves a method for making one component or single component toner compositions for developing electrophotographic images. A binding component is mixed with magnetic particles, pulverized, then carbon black is mixed with the powder and fixed to the surface of the particles. Compositions having a measured resistivity of 4.3.times.10.sup.3 to 4.3.times.10.sup.6 ohm-cm at a D.C. field of below 20 volts/cm under substantially no-load conditions are selected for use.

REFERENCES:
patent: 1978440 (1934-10-01), Shepard
patent: 2870404 (1959-01-01), Oxley
patent: 2919672 (1960-01-01), Benn et al.
patent: 3280036 (1966-10-01), Howell
patent: 3345294 (1967-10-01), Cooper

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