Typewriting machines – Including type-set-assemblage mounted on carrier and... – Including type-faces movable relative to type-face-carrier
Patent
1979-02-05
1981-02-17
Coven, Edward M.
Typewriting machines
Including type-set-assemblage mounted on carrier and...
Including type-faces movable relative to type-face-carrier
400322, 400903, B41J 126
Patent
active
042511615
ABSTRACT:
A serial printer comprises a carriage 1 movable along a printing line by a motor MC with a feedback transducer FBC signalling increments of carriage advance. A daisy wheel 2 carries characters to be printed and is rotated by a stepping motor MS with a feedback transducer FBS. In order to maximize printing speed without complex control of the carriage speed a control unit signals when the carriage 1 reaches each printing point in response to feedback pulses from FBC, whether fixed or proportional spacing is used. If the motor MS has by then completed character selection, as determined by counting feedback pulses from FBS, the carriage is not stopped and printing takes place on-the-fly. If character selection has not been completed, the carriage is stopped and printing is effected when character selection is completed.
REFERENCES:
patent: 3908809 (1975-09-01), Beattie
patent: 3954163 (1976-05-01), Gabor
patent: 4044880 (1977-08-01), Martin
patent: 4091911 (1978-05-01), Cham et al.
patent: 4101006 (1978-07-01), Jensen et al.
Meier et al., IBM Tech. Discl. Bulletin, vol. 19, No. 1, Jun. 1976, pp. 115-117.
Cresti Marcello
Ugo Franco
Coven Edward M.
Ing. C. Olivetti & C. S.p.A.
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