US PATENT SUBCLASS 347 / 159
.~ By electrical discharge (e.g., spark)

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

111  DF  ELECTRIC MARKING APPARATUS OR PROCESSES {3}
159.~ By electrical discharge (e.g., spark) {3}
160  DF  .~.~> Rotary head support
161  DF  .~.~> Electrical discharge burning (e.g., oxidation or electroerosion)
162  DF  .~.~> Including driving circuitry

DEFINITION

Classification: 347/159

By electrical discharge (e.g., spark):

(under subclass 111) Subject matter wherein an image is formed by dielectric breakdown.

(1) Note. The dielectric breakdown may cause an electrical discharge from a head onto a medium by direct contact or across an airgap.

SEE OR SEARCH THIS CLASS, SUBCLASS:

33, for a generic spark recorder combined with an external means for recording the functioning of the external means.

112, for an electrostatic recorder wherein an image is formed on a medium by electrostatic charge deposited onto or discharged from the medium.

199, for thermal marking devices having resistive layer formed on the transfer material or the recording material to conduct and generate heat for marking purposes.

SEE OR SEARCH CLASS 219, Electric Heating,

384, for perforating by an electric spark.

346, Recorders,

150.2, for phenomenal electrical discharge recording.