Print head driving circuit for a wire dot printer

Details Print head driving circuit for a wire dot printer Print head driving circuit for a wire dot printer

1990-02-09

1991-10-08

Eickholt, Eugene H.

Typewriting machines

Typing by other than type-face or type-die

Character formation by impact

400719, 101 9305, 310222, B41J 302

Patent

active

050549413

ABSTRACT:
A drive circuit for a wire dot print head including a driving coil, a print lever attracted by the coil in a first direction, a spring for biasing the print lever in a second opposite direction and a damper includes a DC power source connected to a first end of the driving coil. A transistor is connected to the second end of the driving coil. An output circuit provides a gated output to the transistor. The output circuit receives as a first input a print data signal and as a second input a signal from a reference timing signal generator. The reference timing signal generator includes a drive pulse signal generator which provides an output in response to a print timing pulse which causes the output circuit to provide an output for the driving coil to attract the print lever. The reference timing signal generator also includes a brake pulse signal generator which provides an output when the print head temperature falls outside of a predetermined range after a predetermined interval so that current is caused to flow through the driving coil when the print lever is moving in the second direction and the print head temperature falls outside of the temperature range.

REFERENCES:
patent: 4496824 (1985-01-01), Kawai et al.
patent: 4552064 (1985-11-01), Sanders et al.
patent: 4625137 (1986-11-01), Tomono
patent: 4661002 (1987-04-01), Ara
patent: 4664542 (1987-05-01), Tsugita
patent: 4697939 (1987-10-01), Ara
patent: 4776712 (1988-10-01), Okuno et al.
patent: 4802776 (1989-02-01), Miyazawa et al.

Affiliated with

Also associated with

Rating

Print head driving circuit for a wire dot printer does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Print head driving circuit for a wire dot printer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Print head driving circuit for a wire dot printer will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-254114