Electrothermal printing apparatus

Details Electrothermal printing apparatus Electrothermal printing apparatus

B - Operations, Transporting

41

J

101/43

B41J 2/325 (2006.01)

Patent

CA 1109332

Abstract of the Disclosure Electrothermal printing apparatus includes a thin, planar, endless ribbon of electrically resistive material having a thin conductive layer on an outside surface thereof and a row of spaced- apart, conductive styli individually selectively coupleable to the conductive layer through a voltage source and disposed in contact with the ribbon at the inside surface thereof opposite the conductive layer. Momentarily coupling selected ones of the styli to the voltage source produces heating of discrete areas of the resistive ribbon adjacent the momentarily coupled styli. The ribbon which is mounted on one or more rollers moves relative to the styli and in the same direction and at the same speed as an adjacent length of thermally sensitive paper so that discrete areas of the ribbon heated by the styli remain in contact with the thermally sensitive paper long enough to color discrete areas of the paper adjacent the heated discrete areas of the resistive ribbon.

333042

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