Charging method and developing device adopting the same

Details Charging method and developing device adopting the same Charging method and developing device adopting the same

2005-03-08

2005-03-08

Tran, Hoan (Department: 2852)

Electrophotography

Control of electrophotography process

Control of developing

C399S055000

Reexamination Certificate

active

06865350

ABSTRACT:
The charging method is arranged so as to charge the toner on a developing roller by electrons as generated by the photoelectric effect from a photo-electric surface of a toner layer regulating/charging blade. An electric bias is applied across a toner layer thickness regulating/charging blade and a developing roller, and an amount of electrons discharged indicated by current flowing across the toner layer thickness regulating/charging blade and the developing roller is measured by an amplifier. When the amount of electrons discharged is detected to be 1/t of an initial amount, the amount of light to be received by the photo-electric surface of an ultraviolet ray luminescent is increased by t times to be the initial amount. According to the foregoing method, such event that the photoelectric effect is weakened due to the deterioration of the photoelectric surface can be detected with ease, and thus desirable charged state of toner can be maintained with ease.

REFERENCES:
patent: 6600892 (2003-07-01), Kamimura et al.
patent: 8-101527 (1996-04-01), None

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