Resistive ribbon thermal transfer printing apparatus

Details Resistive ribbon thermal transfer printing apparatus Resistive ribbon thermal transfer printing apparatus

1988-01-28

1989-03-07

Sewell, Paul T.

Typewriting machines

Typing by other than type-face or type-die

Thermal

346 76PH, B41J 312, B41J 320

Patent

active

048101117

ABSTRACT:
A resistive ribbon thermal transfer printing apparatus produces two kinds of electric pulses for selectively energizing recording electrodes of a printing head according to a data to be printed. A first electric pulse (normal pulse) is applied to a recording electrode which is to be energized and is disposed between two recording electrodes which are to be energized. A second electric pulse (specific pulse) is smaller in energy than the normal pulse and is applied to a recording electrode which is to be energized and is not disposed between two recording electrodes which are to be energized. This selective application of the two kinds of pulses allows the size of the printed dots to become uniform.

REFERENCES:
patent: 4623903 (1986-11-01), Hashimoto
patent: 4679055 (1987-07-01), Inui
patent: 4688051 (1987-08-01), Kawakami
patent: 4692044 (1987-09-01), Aviram et al.
Resistive Ribbon Thermal Transfer Printing: A Historical Review and Introduction to a New Printing Technology, by Keith S. Pennington and Walter Crooks; IBM J. Res. Develop. vol. 29, No.5, Sep. 1985.

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