Toner, method for manufacturing same, and imaging apparatus usin

Details Toner, method for manufacturing same, and imaging apparatus usin Toner, method for manufacturing same, and imaging apparatus usin

1994-02-03

1995-10-24

Martin, Roland

Radiation imagery chemistry: process, composition, or product th

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

Post imaging process, finishing, or perfecting composition...

430111, 118653, G03G 908, G03G 1508

Patent

active

054609143

ABSTRACT:
The present invention aims to provide a deformed toner having a narrow toner particle size distribution, a simple manufacturing method of same, and an imaging apparatus using same.
The toner particles are characterized in having an average diameter of d (d is in a range of 4-15 .mu.m), and that a volumetric fraction of the particles having the diameter in a range of d.+-.0.2 d equals to or exceeds 90% of total volume of the particles, and further, when a specific surface area of the toner per 1 cm.sup.3 determined by a BET method is expressed by A (m.sup.2/ g) and a specific gravity of the particle is expressed by D (g/cm.sup.3), A of the particles stands in a range expressed by an equation, 7/(D.multidot.d).ltoreq.A.ltoreq.10/(D.multidot.d).
An image having a preferable definition can be obtained by improving a resolution of image by making the particle size distribution of toner particles narrow, and providing the toner having an electrification charge at least 10 .mu.C/g with a narrow distribution.

REFERENCES:
patent: 5328792 (1994-07-01), Shigemori et al.

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