US PATENT SUBCLASS 347 / 188
.~ Density control

Current as of: June, 1999
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347 /   HD   INCREMENTAL PRINTING OF SYMBOLIC INFORMATION

171  DF  THERMAL MARKING APPARATUS OR PROCESSES {20}
188.~ Density control {7}
189  DF  .~.~> In accordance with ambient temperature
190  DF  .~.~> By number of heated recording elements
191  DF  .~.~> In accordance with thermal output characteristic of the recording means
192  DF  .~.~> By variation in power supply
193  DF  .~.~> By transfer material or record receiver
194  DF  .~.~> In accordance with temperature of the recording means
195  DF  .~.~> By history of recording elements {1}

DEFINITION

Classification: 347/188

Density control:

(under subclass 171) Subject matter comprising a regulating means for controlling amount of heating energy supplied to the recording means to maintain a uniform output on the produced symbol or mark.

SEE OR SEARCH THIS CLASS, SUBCLASS:

131, for dot density or dot size control in an electrostatic recorder using scanning light beam.

251+, for tone marking using singular scanning light beam.