Method for calculating toner age and a method for...

Details Method for calculating toner age and a method for... Method for calculating toner age and a method for...

2007-02-13

2007-02-13

Lee, Susan (Department: 2852)

Electrophotography

Diagnostics

Consumable

C399S030000, C399S062000, C399S257000

Reexamination Certificate

active

10834650

ABSTRACT:
The present invention generally relates to a digital imaging system or a light lens based imaging system. More specifically, the present invention provides an improved method and apparatus for calculating toner age and, additionally, carrier age using a toner concentration sensor and the amount of material dispensed. Both of these quantities can be used to ensure image quality by anticipating or diagnosing problems in image quality, which may be caused by toner age or carrier age.

REFERENCES:
patent: 4439034 (1984-03-01), Daniels
patent: 5025289 (1991-06-01), Guslits et al.
patent: 6047142 (2000-04-01), Donaldson
patent: 6160970 (2000-12-01), Scheuer et al.
patent: 6374064 (2002-04-01), Budnik et al.
patent: 6505832 (2003-01-01), Moore et al.
patent: 2003/0235434 (2003-12-01), Godlove

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