Printing magnet drive device

Details Printing magnet drive device Printing magnet drive device

1979-12-31

1981-03-10

Eickholt, E. H.

Printing

Selective or progressive

Bed and platen machines

323280, 361187, 4001572, B41J 938, H01H 4732, B41J 914

Patent

active

042547059

ABSTRACT:
An improved printing magnet drive device for use in a printing apparatus, such as line printer, is disclosed. The improvement comprises a constant voltage control means in which an output terminal voltage of a transistor is compared with a reference voltage and the comparison result is fed back to the transistor so as to control the output terminal voltage of the transistor to a predetermined value, whereby the voltage applied to the printing magnets is substantially maintained unchanged.

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