Developing device of the type forming thin layer of toner on ton

Details Developing device of the type forming thin layer of toner on ton Developing device of the type forming thin layer of toner on ton

1988-12-13

1992-11-17

Braun, Fred L.

Photocopying

Contact printing

Light boxes

355327, 430109, 430111, 430903, G03G 908, G03G 1501, G03G 1508

Patent

active

051647745

ABSTRACT:
In a developing device and a dry color toner for color electrophotography. The developing device is provided with a toner conveying member and a toner layer thickness controlling member which is in contact with the toner conveying member. The color toner for developing electrostatic images used in this developing device has the following relation between the number average particle diameter and the volume average particle diameter: ##EQU1## Even after a continuous copying, the developing device and the color toner provide substantially the same image quality as that in the earlier stages of the continuous copying.

REFERENCES:
patent: 3942979 (1976-03-01), Jones et al.
patent: 3969251 (1976-07-01), Jones et al.
patent: 4108786 (1978-08-01), Takayama et al.
patent: 4122024 (1978-10-01), Jones et al.
patent: 4543312 (1985-09-01), Murakawa et al.
patent: 4615612 (1986-10-01), Ohno et al.
patent: 4833059 (1989-05-01), Tomura et al.

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