Image forming device

Details Image forming device Image forming device

2011-05-17

2011-05-17

Gray, David M (Department: 2852)

Electrophotography

Machine operation

Having power supply

C399S050000, C399S174000

Reexamination Certificate

active

07945183

ABSTRACT:
An image forming device includes: a high voltage generating circuit for applying an oscillating voltage to a charging member disposed in contact with or proximity to an image carrier, the oscillating voltage having a DC voltage Vdc and an AC voltage Vac superimposed thereon; a current detecting portion for detecting the value of a DC current Idc between the image carrier and the charging member; an AC voltage control portion for controlling the value of the AC voltage Vac so as to secure the detected value of the DC current Idc within a target current range; and an aging control portion for performing rotation driving of the image carrier while securing the AC voltage Vac and the DC voltage Vdc at preset voltage values and setting the frequency of the AC voltage Vac at a frequency different from a frequency during an image forming operation.

REFERENCES:
patent: 4851960 (1989-07-01), Nakamura et al.
patent: 6532347 (2003-03-01), Watanabe et al.
patent: 2002/0041767 (2002-04-01), Saito et al.
patent: 2007/0098424 (2007-05-01), Okada
patent: 2007/0189788 (2007-08-01), Hagiwara et al.
patent: 63-149668 (1988-06-01), None
patent: 2001-201921 (2001-07-01), None
patent: 2007-199374 (2007-08-01), None

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