Impact type dot printer

Details Impact type dot printer Impact type dot printer

1985-09-17

1987-02-17

Sewell, Paul T.

Typewriting machines

Typing by other than type-face or type-die

Character formation by impact

101 9304, B41J 308

Patent

active

046435964

ABSTRACT:
An impact dot printer has a print head which reciprocates back and forth in front of a rotationally driven platen to print dot matrix characters on a recording medium. The print head includes a single print hammer actuated by an electromagnetic driver. A succession of print timing signals are produced in synchronism with the rotational speed of the platen, and a home signal is generated each time the print head leaves its home position during the printing of each line. A control circuit initiates the printing of each line in response to the first print timing signal produced after generation of the home signal and controls the application of driving pulses to the electromagnetic driver so as to synchronize the actuation of the print hammer with the platen rotation.

REFERENCES:
patent: 3324240 (1967-06-01), Kleinschmidt et al.
patent: 3804008 (1974-04-01), Hoyer
patent: 3834304 (1974-09-01), Potter
patent: 3926293 (1975-12-01), Ljungberg
patent: 4024941 (1977-05-01), Sekikawa
patent: 4077336 (1978-03-01), Talvard et al.
patent: 4202638 (1980-05-01), Stenudd

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