Photocopying – Contact printing – Light boxes
Patent
1995-03-20
1996-10-22
Pendegrass, Joan H.
Photocopying
Contact printing
Light boxes
355268, G03G 1502
Patent
active
055682324
ABSTRACT:
An image forming apparatus including an electrostatic latent image carrier which has a first voltage of the same polarity as the charge characteristics of the electrostatic latent image carrier, a contact charging device which has a second voltage of the same polarity as the charge characteristics of the electrostatic latent image carrier and a lower absolute value than the first voltage, and a toner carrier which has a third voltage of the same polarity as the charge characteristics of the electrostatic latent image carrier and a lower absolute value than the first voltage. During the non-imaging period, the toner fragments and shavings on the charging device are attracted to the electrostatic latent image carrier due to the potential difference between the charging device and the electrostatic latent image carrier. Additionally, by applying the third voltage to the toner carrier, none of the toners are able to adhere onto the reduced potential region which is created by supplying the second voltage to the charging device.
REFERENCES:
patent: 5371578 (1994-12-01), Asano et al.
Grainger Quana
NEC Corporation
Pendegrass Joan H.
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