Full-width array sensing of two-dimensional residual mass...

Details Full-width array sensing of two-dimensional residual mass... Full-width array sensing of two-dimensional residual mass...

2007-06-26

2007-06-26

Tran, Hoan (Department: 2852)

Electrophotography

Control of electrophotography process

Of plural processes

C399S060000, C399S129000

Reexamination Certificate

active

11094454

ABSTRACT:
A defect analysis system for a xerographic print engine includes a residual mass sensor that senses the two-dimensional signature structure of residual mass remaining on a photoconductive or other substrate surface after image transfer. Preferably, the sensor is a full width array that spans substantially an entire width of the photoconductive surface. This information is then processed and analyzed to determine a specific type of transfer defect present. This may include the quantified level of defect for each detected type. The defect analysis system may also include a closed-loop control system that can adjust various xerographic process parameters using feedback based on the identification and optionally magnitude of each specific defect type. The identified print quality defect, such as mottle, streaks, point deletions, graininess, etc. can then be used to determine a customized corrective control action to be taken by the feedback control of the xerographic print engine to remedy or compensate for the defect(s).

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Chunhui Zhong; “Bayesian Belief Network Modeling and Diagnosis of Xerographic Systems”; Department of Mechanical Engineering, University of Minnesota; date unknown but prior to Mar. 31, 2005.

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