Electrostatic imaging device having means for removing undesirab

Details Electrostatic imaging device having means for removing undesirab Electrostatic imaging device having means for removing undesirab

1997-10-06

1999-10-12

Pendegrass, Joan

Electrophotography

Internal machine environment

Particle or contaminant control

399101, 399175, G03G 1502, G03G 2100

Patent

active

059665637

ABSTRACT:
An electrostatic imaging device has a photoreceptor drum, an exposure unit to form a latent image on the photoreceptor, a developing unit for forming a toner pattern on the photoreceptor, a transcribing roller for electrifying the photoreceptor drum and transcribing the toner pattern onto a recording sheet, a brush charger for electrifying the photoreceptor drum, and a power supply section for applying a first negative voltage to the transcribing roller and a second negative voltage to the brush charger during a period other than an image forming period. The second voltage is lower than the first voltage in absolute value. Undesirable particles having a positive potential and attached to the brush charger is collected to the photoreceptor drum for cleaning the brush charger.

REFERENCES:
patent: 5337127 (1994-08-01), Imaue
patent: 5371578 (1994-12-01), Asano et al.
patent: 5621509 (1997-04-01), Karashima et al.

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