Electrophotography – Diagnostics – Consumable
Reexamination Certificate
2007-06-05
2007-06-05
Chen, Sophia S. (Department: 2852)
Electrophotography
Diagnostics
Consumable
C399S027000, C399S058000
Reexamination Certificate
active
11169715
ABSTRACT:
A closed-loop toner concentration adjustment system extends xerographic process control performance with a system and method including a first controller to adjust toner concentration (TC) in a developer of the imaging device to alter a DMA level of the imaging device, the TC being adjusted based on a TC target value; a second controller to adjust an electrostatic development field to alter the DMA level; and an adjustment logic device to adjust the TC target value based on adjustments made to the electrostatic development field. The first controller outputs a dispense amount to the developer based on a difference between a measurement of the actual TC and the TC target value, thereby adjusting the TC based on the dispense amount to the developer. The second controller adjusts the electrostatic development field based on a difference between a measurement of the actual DMA level and a DMA target value. The adjustment logic monitors the adjustments made to the electrostatic development field to determine a trend, and adjusts the TC target value based on the trend.
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Eun Yongsoon
Floyd Lawrence
Gross Eric M
Hamby Eric S
Mastrandrea Joseph A
Chen Sophia S.
Xerox Corporation
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