Method and apparatus for charging a photoconductive surface to a

Details Method and apparatus for charging a photoconductive surface to a Method and apparatus for charging a photoconductive surface to a

1992-09-15

1993-09-21

Grimley, A. T.

Photocopying

Contact printing

Light boxes

355221, 361225, G03G 1502

Patent

active

052473287

ABSTRACT:
An apparatus for charging a photoconductive surface to a substantially uniform potential in a printing machine having a cleaning station for cleaning the surface and an exposure station for exposing the surface to a light source includes a first mechanism for charging the surface to a substantially uniform potential of a first polarity after the surface is cleaned at the cleaning station. The apparatus further includes a second mechanism for charging the surface to a substantially uniform potential of a second polarity opposite to the first polarity after the surface is charged to the substantially uniform potential of the first polarity by the first charging mechanism and before the surface is exposed to the light source at the exposure station. Similarly, a method of charging a photoconductive surface to a substantially uniform potential in a printing machine having a cleaning station for cleaning the surface and an exposure station for exposing the surface to a light source, includes the steps of (1) charging the surface to a substantially uniform potential of a first polarity after the surface is cleaned at the cleaning station; and (2) charging the surface to a substantially uniform potential of a second polarity opposite to the first polarity after the first polarity charging step and before the surface is exposed to the light source at the exposure station.

REFERENCES:
patent: 3675011 (1972-07-01), Silverberg
patent: 4449808 (1984-05-01), Abreu
patent: 4558221 (1985-12-01), Gundlach et al.
patent: 4585322 (1986-04-01), Reale
patent: 4603964 (1986-08-01), Swistak
patent: 4638397 (1987-01-01), Foley
patent: 4646196 (1987-02-01), Reale
patent: 4725731 (1988-02-01), Lang
patent: 4725732 (1988-02-01), Lang et al.
patent: 4757345 (1988-07-01), Ohashi et al.
patent: 4764675 (1988-08-01), Levy et al.
patent: 4780385 (1988-10-01), Wieloch et al.
patent: 4837658 (1989-06-01), Reale
patent: 4841146 (1989-06-01), Gundlach et al.
patent: 4949125 (1990-08-01), Yamamoto et al.
patent: 5049935 (1991-09-01), Saito et al.
patent: 5087944 (1992-02-01), Yamauchi
patent: 5132738 (1992-07-01), Nakamura et al.
Pai et al. "Double Charging Technique to Reduce Dark Decay and Cycle Down", Xerox Disclosure Journal; vol. 13, No. 1, Jan./Feb. 1988, p. 29.
VonHoene et al.; "Overcoated Photoreceptor Process Using Dicorotron Units"; Xerox Disclosure Journal; vol. 5, No. 3, May/Jun. 1980, p. 327-328.

Affiliated with

Also associated with

Rating

Method and apparatus for charging a photoconductive surface to a does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and apparatus for charging a photoconductive surface to a, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for charging a photoconductive surface to a will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1053915