US PATENT SUBCLASS 400 / 697
.~.~ By overprinting (e.g, with coated material) to cancel error

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

679  DF  MEANS AUXILIARY TO TYPEWRITING FUNCTION {12}
695  DF  .~ Means for correcting typing errors (e.g., by abrasive eraser, etc.) {5}
697.~.~ By overprinting (e.g, with coated material) to cancel error {1}
697.1  DF  .~.~.~> With drive for ribbon having coating thereon

DEFINITION

Classification: 400/697

By overprinting (e.g., with coated material) to cancel error:

(under subclass 695) Subject matter wherein a mistake is removed by using a specially prepared sheet or tape that has on one surface thereof a coating of a color approximating the color of the record-medium*, which coating will adhere to the ink* of an imprinted character*, which sheet or tape is used by temporarily placing it between the incorrectly imprinted character and the type-face* that was improperly used, and restriking with the same improper type-face, thereby causing the incorrectly imprinted character to be covered by the coating.

SEE OR SEARCH THIS CLASS, SUBCLASS:

240.1, for a ribbon* having a field for imprinting character symbols and a field for overprinting erroneous characters.