Printing – Selective or progressive – Bed and platen machines
Patent
1981-09-09
1983-05-24
Coven, Edward M.
Printing
Selective or progressive
Bed and platen machines
4001573, B41J 792
Patent
active
043845207
ABSTRACT:
In a high speed impact printer of the type arranged to impact a plurality of print hammers against given types carried by a type carrier by energizing corresponding solenoids, the energization of given solenoid or solenoids is started from a given point of time. The given solenoid(s) is/are continuously energized for a predetermined interval which is accurately determined by digital circuitry having a counter. A memory for storing data each indicative of a place in a print line in each address thereof, is provided, where a given address of the memory is periodically read and written at a given interval in response to the output signal of the counter which periodically counts the number of clock pulses. The data stored in the memory is decoded to terminate the energization of the given solenoid(s). The device according to the invention may be applied to a printer of the type arranged to drive each print hammer one after another in a sequence from the first place to the last place of a print line, and also to a printer of the type arranged to drive one or more print hammers simultaneously.
REFERENCES:
patent: 4189246 (1980-02-01), Kane et al.
patent: 4262592 (1981-04-01), Araki
patent: 4278021 (1981-07-01), Nakano et al.
patent: 4280404 (1981-07-01), Barrus et al.
patent: 4293888 (1981-10-01), McCarty
Hosoya Kensei
Nakano Hiroshige
Coven Edward M.
Hitachi Koki Company Limited
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