Control system for matrix print head

Details Control system for matrix print head Control system for matrix print head

1977-06-13

1979-09-11

Sewell, Paul T.

Typewriting machines

Typing by other than type-face or type-die

Character formation by impact

101 9305, B41J 312

Patent

active

041673425

ABSTRACT:
A system for printing dot-matrix characters wherein a double column of dot forming elements is used, and no single dot forming element is required to print more often than once in any four column interval of printed text. Means for timing the actuation of the dot forming elements wherein the "on" time of the individual actuators can be longer than the time interval between columns is included.

REFERENCES:
patent: 3925790 (1975-12-01), Fishbeck
patent: 3938641 (1976-02-01), Fulton
patent: 4010835 (1977-03-01), Martin et al.
patent: 4033444 (1977-07-01), Beery
IBM Tech. Disc. Bulletin, J. W. Raider, vol. 17, No. 12, May 1975, pp. 3560-3561.
IBM Tech. Disc. Bulletin, D. P. Darwin, vol. 18, No. 9, Feb. 1976, pp. 2762-2763.

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