Drive circuit for thermal printer

Details Drive circuit for thermal printer Drive circuit for thermal printer

1981-06-19

1982-08-24

Eickholt, E. H.

Typewriting machines

Typing by other than type-face or type-die

Thermal

346 76PH, 101DIG2, B41J 302

Patent

active

043458459

ABSTRACT:
An electrode drive configuration for a resistive ribbon thermal printer utilizes as a feedback a monitored signal representative of an internal ribbon voltage at the print point. A monitoring contact is preferably located on the opposite side of the printhead from the drive signal return contact and the feedback signal is used to cancel the effects voltage drop variations in the common return portion of the drive signal path.

REFERENCES:
patent: 2713822 (1955-07-01), Newman
patent: 3119919 (1964-01-01), Pratt
patent: 3132584 (1964-05-01), Dalton
patent: 3744611 (1973-07-01), Montanari et al.
patent: 3847265 (1974-11-01), Ehretsmann et al.
patent: 4032925 (1977-06-01), Kos
Wilbur "Electrothermal Print Head" IBM Tech. Disclosure Bulletin, vol. 23, No. 9, Feb. 1981, pp. 4305-4306.

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