US PATENT SUBCLASS 234 / 6
.~ Embodying means to facilitate error correction


Current as of: June, 1999
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234 /   HD   SELECTIVE CUTTING (E.G., PUNCHING)

4  DF  WITH TYPE-WIDTH AND INTER-WORD-SPACE TOTALIZER OR INDICATOR (I.E., FOR JUSTIFICATION) {5}
6.~ Embodying means to facilitate error correction


DEFINITION

Classification: 234/6

(under subclass 4) Device which includes a modification adapted to simplify or reduce the number of operations required to effect the cancellation of a portion of the series of perforations made in previous cycles of the machine.

(1) Note. Such a device usually operates in two general steps: (1) to restore the justification counter and indicator to the conditions they occupied prior to the punching of the canceled subject matter; and (2) to overpunch the matter to be canceled, or to insert an error symbol in appropriate position to be sensed by the type-casting machine for which the tape is intended to be used.