Developing unit for electro-photographic apparatus

Details Developing unit for electro-photographic apparatus Developing unit for electro-photographic apparatus

1995-03-02

1996-11-26

Ramirez, Nestor R.

Photocopying

Contact printing

Light boxes

355246, G03G 1506

Patent

active

055790917

ABSTRACT:
When a developing agent prepared to have a preset toner density is loaded in a developing unit, a comparing reference level for controlling the toner density in the developing agent is changed to a value higher than the preset value in the initial stage of operation and fresh toner is supplied to the developing agent so that the toner density of the developing agent is increased in comparison to the reference level. Thereby, the developed density is prevented from decreasing due to an excess amount of friction charge of the toner.

REFERENCES:
patent: 4870460 (1989-09-01), Harada et al.
patent: 5504557 (1995-04-01), Morita et al.

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