Developing apparatus

Details Developing apparatus Developing apparatus

1985-05-31

1987-03-31

Pianalto, Bernard D.

Coating apparatus

With means to apply electrical and/or radiant energy to work...

With electromagnetic and/or electrostatic removal of...

118653, G03G 1506

Patent

active

046534261

ABSTRACT:
A developing apparatus in which a toner carrying surface is provided spaced opposite an electrostatic latent image surface to form a very small gap therebetween, and A.C. bias voltage is applied to the gap to jump toner to an electrostatic latent image portion, wherein the A.C. voltage applied to the gap has a frequency which varies with time, and the toner is jumped to the electrostatic latent image portion under influence of an alternating electric field established by the A.C. voltage, increasing the toner particle jumping possibility and improving the gradation and denseness properties of the resulting developed image.

REFERENCES:
patent: 3232190 (1966-02-01), Willmott
patent: 3893418 (1975-07-01), Liebman et al.
patent: 3924943 (1975-12-01), Fletcher
patent: 4124483 (1978-11-01), Christenson
patent: 4378158 (1983-03-01), Kanbe
patent: 4508052 (1985-04-01), Kohyama

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