Photocopying – Contact printing – Light boxes
Patent
1988-04-19
1989-11-07
Grimley, Arthur T.
Photocopying
Contact printing
Light boxes
355214, 355219, 355246, 430 31, 3461601, G03G 1500
Patent
active
048795771
ABSTRACT:
The saturation voltage of a photoconductor used in a discharged area development (DAD) reproduction device is used to control and maintain the voltage vectors that are associated with (1) the photoconductor's fully charged background area, (2) the development electrode voltage at the reproduction device's developer station, (3) the photoconductor voltage in areas that are occupied by image characters having a small surface area, and (4) the photoconductor voltage in a test patch area that is associated with a toner concentration control network having a toner patch sensor. These electrstatic parameters are periodically adjusted, to compensate for changes in the operating characteristics of the photoconductor and the imaging station.
REFERENCES:
patent: 3788739 (1974-01-01), Coriale
patent: 3835380 (1974-09-01), Webb
patent: 4466731 (1984-08-01), Champion et al.
patent: 4468112 (1984-08-01), Suzuki et al.
patent: 4542981 (1985-09-01), Anazi et al.
patent: 4582839 (1986-04-01), Suzuki
patent: 4625176 (1986-11-01), Champion et al.
Mabrouk Saied A.
Wheeler Gerald L.
Grimley Arthur T.
International Business Machines - Corporation
Pendegrass J.
Rohrer Charles E.
Sirr Francis A.
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