Electronic typewriter

Details Electronic typewriter Electronic typewriter

1980-12-12

1983-06-28

Sewell, Paul T.

Typewriting machines

Including type-set-assemblage mounted on carrier and...

Including type-faces movable relative to type-face-carrier

101 9319, 4001572, B41J 130

Patent

active

043902936

ABSTRACT:
The electronic typewriter comprises a character-carrier disc with flexible blades, which is mounted on a carriage which is movable transversely with respect to the typing roller by means of a stepping motor. Mounted on the carriage is a motor for selecting the character, a striker hammer, a positioning device and an actuating motor which actuates the hammer and the positioning device and which also provides for activating the operations by means of a typing ribbon and by means of a correction ribbon. The selection motor is supplied by a servo control of digital type which imparts to the motor a speed which is proportional to the positional error, positioning the blade of the character to be typed with a maximum error of .+-.1/4 of a pitch. The positioning device then provides for correction of the character, engaging a recess of a positioning disc which is synchronous with the character-carrier disc.

REFERENCES:
patent: 3371766 (1968-03-01), Staller
patent: 4049109 (1977-09-01), Plaza et al.
patent: 4119384 (1978-10-01), Keiter
patent: 4178107 (1979-12-01), Guerrini et al.
patent: 4203675 (1980-05-01), Osmera et al.
patent: 4226546 (1980-10-01), Hoffman
patent: 4239400 (1980-12-01), Giolitti
patent: 4249829 (1981-02-01), Link et al.

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