Electrophotography – Control of electrophotography process – Control of developing
Patent
1999-10-27
2000-12-12
Chen, Sophia S.
Electrophotography
Control of electrophotography process
Control of developing
399 27, 399 49, 430120, G03G 1508
Patent
active
061609706
ABSTRACT:
The present invention generally relates to an imaging system, and more specifically, a method and apparatus for accurately predicting toner usage and hence toner dispensing requirements in an imaging system. More, specifically, the present invention relates to a toner concentration control system for maintaining toner concentration in a developer structure, which is connected to a dispenser containing toner. The toner concentration control system including: a toner mass estimator providing a toner mass estimate of the toner mass in the developer structure to be applied to the photoreceptor; a feed forward dispense unit receiving the toner mass estimate and transmitting a feed forward dispense command based on the toner mass estimate; a toner concentration target adjusted for toner age in the developer structure; a feed back dispense unit receiving the adjusted toner concentration target and transmitting a feedback dispense command; and a total dispense unit receiving the feed forward dispense command and the feedback dispense command, and outputting total dispense command to the dispenser, which dispenses the toner to the developer structure in accordance with the total dispense command.
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U.S. Patent Application Serial No. 09/318,953, filed May 26, 1999, entitled "Toner Age Calculation In Print Engine Diagnostic".
Buranicz John
Donaldson Patricia J.
Garsin Paul A.
Gross Eric M.
Hamby Eric S.
Chen Sophia S.
Daebeler Paul F.
Xerox Corporation
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