US PATENT SUBCLASS 399 / 62
.~.~.~.~ Concentration detection

Current as of: June, 1999
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399 /   HD   ELECTROPHOTOGRAPHY

38  DF  CONTROL OF ELECTROPHOTOGRAPHY PROCESS {15}
53  DF  .~ Control of developing {4}
58  DF  .~.~ Concentration control {3}
61  DF  .~.~.~ Detection of toner in developing unit {1}
62.~.~.~.~ Concentration detection {2}
63  DF  .~.~.~.~.~> Magnetic detector
64  DF  .~.~.~.~.~> Optical detector {1}

DEFINITION

Classification: 399/62

Concentration detection:

(under subclass 61) Subject matter wherein the concentration is controlled in response to a detected toner and carrier mixture ratio.

SEE OR SEARCH THIS CLASS, SUBCLASS:

30, for toner concentration detector.

OTHER CLASSIFICATION SYSTEMS:

ipc{2}G03G15/10, for using a liquid developer.

epcG03G15/08H1E, for a concentration being measured by electrical means.