Typewriter having means for interruption of automatic erasing op

Details Typewriter having means for interruption of automatic erasing op Typewriter having means for interruption of automatic erasing op

1986-12-29

1989-05-30

Sewell, Paul T.

Typewriting machines

Means auxiliary to typewriting function

Means for correcting typing errors

400695, B41J 2936

Patent

active

048345660

ABSTRACT:
A typewriter having an automatic erasing function, having an erasing device responsive to an erasure-start key, for effecting an erasing operation to successively erase the characters printed by a printing device, and a controller responsive to the erasure-stop key, for permitting the erasing device to interrupt the erasing operation. The typewriter has an input buffer for storing input data which is entered through a keyboard while the erasing device is operated, the typewriter. The typewriter may be arranged so that the input buffer is cleared upon operation of an erasure-stop key. The above arrangement may be adapted to erase successive words on a display device as character and space data are retrieved from a memory. In this case, a device may be provided to suspend a continuous erasing operation for a predetermined time each time the space data representative of a space between the words has been retrieved from the memory after at least one character has been erased.

REFERENCES:
patent: 3870846 (1975-03-01), Filip
patent: 3997046 (1976-12-01), Wolowitz
patent: 4202637 (1980-05-01), Tummolo
patent: 4245918 (1981-01-01), Bowles et al.
patent: 4374626 (1983-02-01), Hooker
patent: 4413266 (1983-01-01), Aviram et al.
patent: 4561793 (1985-12-01), Blanchard, Jr.

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