Error correcting typewriter with electronically controlled backs

Details Error correcting typewriter with electronically controlled backs Error correcting typewriter with electronically controlled backs

1979-07-05

1981-09-01

Wright, Jr., Ernest T.

Typewriting machines

Means auxiliary to typewriting function

Means for correcting typing errors

400308, 400310, 400320, 400903, B41J 2916

Patent

active

042868890

ABSTRACT:
An error correcting typewriter wherein a backspace correction key is operative to read an incorrect character from memory, to in turn reversely move a stepper motor controlled carriage twice the width of a character in error and then forwardly the width of the character in error and then to effect overstrike printing of the character in error.

REFERENCES:
patent: 2872015 (1959-02-01), Toggenburger
patent: 3764993 (1973-10-01), Lettieri
patent: 3780846 (1973-12-01), Kolpek et al.
patent: 3831728 (1974-08-01), Woods et al.
patent: 3844395 (1974-10-01), Mero et al.
patent: 3993179 (1976-11-01), Gubelmann et al.
patent: 4024447 (1977-05-01), Epstein
patent: 4074067 (1978-02-01), Speckhard
patent: 4096935 (1978-06-01), Hanakata et al.
patent: 4181444 (1980-01-01), Heider
IBM Technical Disclosure Bulletin, "Error Correction For Proportional Spacing Typewriter, " Johnson et al., vol. 12, No. 5, Oct. 1969, pp. 645-646.

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