Electrothermic non-impact recording method and apparatus

Recorders – Thermal recording

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346 11, 400120, G02B 706

Patent

active

044207581

ABSTRACT:
Electrothermic non-impact recording method and apparatus capable of printing with electroconductive thermal-transferable ink on a recording medium by reciprocating a recording head relative to the recording medium, which recording head comprises (i) a plurality of recording styli and (ii) a return electrode in contact with an electroconductive ink ribbon comprising a thermal-transferable ink material, the ink ribbon being in contact with a receiving surface of a recording medium; by applying between selected recording styli and the return electrode an image-delineating electric current, through resistor elements, each of which is connected between each of the recording styli and each of the output terminals from which the image-delineating electric current is output, the resistance of each resistor element being in the range of 1/10 to 10 times the resistance of the portion of the ink ribbon between each recording stylus and the return electrode, thus causing the image-delineating electric current to flow through the portions in the ink ribbon immediately below the selected recording styli and to generate Joule's heat in those portions, by which Joule's heat the thermal-transferable ink material in those portions is melted and made transferable; and by transferring the thermal-transferable ink material from the ink ribbon to the recording medium.

REFERENCES:
patent: 4309117 (1982-01-01), Chang et al.
patent: 4345845 (1982-08-01), Bohnhoff et al.

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