Electrophotography – Diagnostics – Consumable
Reexamination Certificate
2006-06-01
2009-08-04
Gray, David M (Department: 2852)
Electrophotography
Diagnostics
Consumable
C399S237000, C073S061710, C073S597000
Reexamination Certificate
active
07570893
ABSTRACT:
A method and apparatus for monitoring marking liquid including a carrier liquid having solid particles therein. A transmitter emits an ultrasonic signal into the marking liquid. The ultrasonic signal is received by a receiver and processed by a controller to determine at least one of the temperature of the marking liquid and the concentration of solid particles in the marking liquid.
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Gray David M
Hewlett--Packard Development Company, L.P.
Hyder G. M.
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