Dot printer

Details Dot printer Dot printer

1986-06-30

1989-03-21

Sewell, Paul T.

Typewriting machines

Typing by other than type-face or type-die

Character formation by impact

101 9305, 400470, B41J 312, B41J 2718

Patent

active

048137979

ABSTRACT:
A dot printer wherein magnetic ink is fed by magnetic-flux generating means to a slit formed between a pair of magnetic poles, and needles are selectively driven so that tips thereof furnished with the magnetic ink are brought into contact with a recording paper to perform printing with the ink. Since the magnetic ink is fed to the slit only during the operation of the printer, the ink is not present in the slit when no printing operation is being performed, hence preventing occurrence of a trouble that may otherwise be induced by evaporation of the magnetic ink.

REFERENCES:
patent: 2842244 (1958-07-01), Gibson
patent: 3596285 (1971-07-01), Gottwald
patent: 4279523 (1981-07-01), Ringle

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