Dual ESB cleaner with alternating bias using duty cycle control

Details Dual ESB cleaner with alternating bias using duty cycle control Dual ESB cleaner with alternating bias using duty cycle control

1995-11-15

1997-08-05

Grimley, Arthur T.

Electrophotography

Cleaning of imaging surface

Plural diverse

399354, G03G 2100

Patent

active

056552041

ABSTRACT:
An apparatus and method for cleaning particles from the imaging surface of the photoreceptor is by having a DC biased electrostatic brush remove the majority of the residual particles on the imaging surface with an AC biased brush as a follow-up for removal of residual particles. These particles have a predominant electrical polarity of right or wrong sign charge. The degree to which this AC biased brush removes each sign toner is controlled by the duty cycle. The responsibility of the first brush, in the direction of motion of the photoreceptor, is reduced by reducing the brush biases, the speed or the photoreceptor interference (BPI) of the first brush, in the direction of motion of the photoreceptor and allowing the second brush to take on higher percentage of the cleaning load. This enables longer brush life and reduces detoning stress. Alternatively, the second brush may increase in latitude, leaving the first brush parameters unchanged, enabling superior cleaning performance or reduced brush costs.

REFERENCES:
patent: 4640599 (1987-02-01), Doutney
patent: 5257079 (1993-10-01), Lange et al.
patent: 5416572 (1995-05-01), Kolb et al.
patent: 5519480 (1996-05-01), Thayer et al.
patent: 5559593 (1996-09-01), Yoshinaga et al.
Lindblad et al.; "Dual Electrostatic Brush Cleaner for Cleaning Multiple Toner Types"; Xerox Disclosure Journal; vol. 15; No. 6; Nov./Dec.; 1990; pp. 463-466.

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