US PATENT SUBCLASS 399 / 61
.~.~.~ Detection of toner in developing unit

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.~.~.~ Detection of toner in developing unit {1}
62  DF  .~.~.~.~> Concentration detection {2}

DEFINITION

Classification: 399/61

Detection of toner in developing unit:

(under subclass 58) Subject matter wherein the concentration is controlled in response to detecting a property of the developer.

(1) Note. For example, this subject matter includes electrical property of toner or charge/mass ratio (Q/M).

SEE OR SEARCH THIS CLASS, SUBCLASS:

27, for diagnostic of consumables (e.g., toner).

35, for diagnostics of cleaning a waste toner container.

49, for detection of toner involving plural control processes.

99+, for toner removal.

106, for a toner cartridge. 120, for a new and waste toner container.

129, for supplemental exposure or charging of residual toner.

134, for image formation with photoconductive toner.

224, for adding colored toner.

239+, for application of liquid developer.

253, for conditioning dry toner.

254+, for mixing dry toner.

258+, for supplying new toner.

265+, for application of dry developer.

359, for supplying reclaimed toner to the developing device.

409, for binding copies by toner. OTHER CLASSIFICATION SYSTEMS:

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

jpofiG03G15/08 507K, for detecting and testing.