Non-impact electrothermic recording method

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346 76PH, G01D 1510

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active

048537071

ABSTRACT:
A non-impact electrothermic recording method using an ink sheet comprising at least an electroconductive base layer, an electroconductive thin layer and an electroconductive image transfer ink layer, with the effective resistance of the ink sheet being in the range of from 50.OMEGA. to 20 K.OMEGA., is disclosed which is carried out by superimposing the ink sheet on a recording medium and applying between an recording electrode and a return electrode situated in contact with the ink sheet (i) image-delineating voltage signals with a fixed application time, with the voltage of the image-delineating signals changed in accordance with the image density of images to be reproduced on the recording medium, or (ii) image-delineating voltage signals with a fixed voltage, with the application time changed in accordance with the image density of images to be reproduced on the recording medium, so as to generate Joule's heat in the portions in the ink sheet immediately below the recording electrode; and transferring the electroconductive thermal-transferable ink material from the ink sheet to the recording medium.

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IBM Technical Disclosure Bulletin, vol. 18, No. 8 (Jan. 1976), "Thermal Transfer Printer Employing Special Ribbons Heated With A Current Pulse".

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