Printing – Selective or progressive – Printing members and inkers
Patent
1981-04-21
1983-08-30
Burr, Edgar S.
Printing
Selective or progressive
Printing members and inkers
101 9316, 101 99, 101110, B41J 700
Patent
active
044010273
ABSTRACT:
A printing mechanism is disclosed which has a cylindrical type wheel rotatably supported on a driving shaft and carrying a plural number of types arranged on it circumferential surface at regular angular intervals and protruding from the surface. For effecting printing, one of the types is selected and the selected type is struck against a recording medium making use of a energy of rotation. The present invention is directed to improvement in such type of printer. The improvement comprises an elastic member through which the type wheel is supported on the driving shaft. The elastic member is fixed to the driving shaft. The type wheel is disposed concentrically with the driving shaft and spaced from a platen by a determined distance. The elastic member is engaged with projections formed on the inner circumferential surface of the type wheel so as to transmit rotation of the driving shaft to the wheel. After selecting a time point for printing a selected type, the type wheel is stopped rotating and moved, as a whole, toward the platen eccentrically to the driving shaft so as to strike the selected type against the platen for effecting printing. After printing, the elastic member is disengaged from the inner projections thereby allowing the type wheel to move back toward the driving shaft while the type wheel being still in the state substantially stopped rotating.
REFERENCES:
patent: 3734012 (1973-05-01), Huggins
patent: 3771442 (1973-11-01), Ditman
patent: 3807301 (1974-04-01), Decker
patent: 3920113 (1975-11-01), Tamai
patent: 4018156 (1977-04-01), Giordano
patent: 4284003 (1981-08-01), Tollet
Burr Edgar S.
Canon Denshi Kabushiki Kaisha
Canon Kabushiki Kaisha
Lewis Bradley M.
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