Cross-process charge uniformity scanner

Details Cross-process charge uniformity scanner Cross-process charge uniformity scanner

2008-01-29

2008-01-29

Gray, David M. (Department: 2852)

Electrophotography

Control of electrophotography process

Of plural processes

C399S073000, C399S100000

Reexamination Certificate

active

07324766

ABSTRACT:
In a xerographic printing apparatus, feedback on surface charge at a plurality of locations across a length of a photoreceptor may be desirable to assess charge uniformity, for example, to ensure color consistency across multiple marking engines in tightly integrated parallel printing architectures. A cross process charge uniformity scanner may include at least one micro-electro-mechanical based electrostatic voltmeter device for measuring surface charge at a plurality of locations along the length of the photoreceptor. The charge uniformity scanner may allow the xerographic printing apparatus to initiate charge device cleaning and/or control the intensity of the charge applied to the surface of the photoreceptor. Exemplary embodiments may include an electrostatic voltmeter moveably mounted along the length of the photoreceptor in the fast scanning direction, or may include a plurality of electrostatic voltmeters disposed at spaced apart locations along the length of the photoreceptor.

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