US PATENT SUBCLASS 400 / 120.09
.~.~ Density control

Current as of: June, 1999
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400 /   HD   TYPEWRITING MACHINES

118.2  DF  TYPING BY OTHER THAN TYPE-FACE OR TYPE-DIE {3}
120.01  DF  .~ Thermal {7}
120.09.~.~ Density control {6}
120.1  DF  .~.~.~> By number of heated recording elements
120.11  DF  .~.~.~> In accordance with output characteristic of recording elements
120.12  DF  .~.~.~> By voltage regulation
120.13  DF  .~.~.~> By transfer material or record receiver
120.14  DF  .~.~.~> In accordance with temperature of the recording means
120.15  DF  .~.~.~> By history of recording elements

DEFINITION

Classification: 400/120.09

Density control:

(under subclass 120.01) Subject matter comprising a regulating means for controlling the amount of energy supplied to the recording means to maintain a uniform output on the record.