Typewriting machines – For typing or forming continuous or discontinuous line – Including programmed-control-system
Patent
1977-07-08
1979-04-24
Sewell, Paul T.
Typewriting machines
For typing or forming continuous or discontinuous line
Including programmed-control-system
400 18, 346140A, B41J 304
Patent
active
041509021
ABSTRACT:
The printer is provided with a single tracing element for tracing characters under the control of stored digital instructions corresponding to a set of segments of the character. The tracing element is moved on the printing surface according to a pair of coordinates, within the limits of each character. To this end it is carried by a frame including a pair of hinged elements directed according to the two coordinates and moved by a pair of electromagnets. These latter are controlled by feed back circuits including a pair of position sensors. The frame is mounted on a carriage transversely movable according to other instruction for letter spacing. A movement of the printing element according to a third coordinate causes the tracing element to press the paper with a pressure corresponding to the thickness of the sign. The instructions of each segment include the speed of the tracing element along the two coordinates, whereby by altering either the time interval of operation or the amplitude of signals, the character can be altered in sizes along one or two coordinates. The instructions of one or more alphabets or type fonts are stored in a pluggable ROM addressable by input signals. The printer is particularly adapted for electronic typewriters, word processing apparatus, as well as for running hand and ideographic characters, for example, characters of Arabic, Urdu, Chinese, Kanji etc. languages.
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Ing. C. Olivetti & C.
Sewell Paul T.
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