Thermal print bar

Details Thermal print bar Thermal print bar

1978-09-05

1980-08-12

Albritton, C. L.

Electric heating

Heating devices

Combined with diverse-type art device

219543, H05B 100

Patent

active

042174805

ABSTRACT:
In a thermal print bar for use in facsimile systems, an array of individually selectable electrical current paths are defined in a strip of resistive materials having a high negative temperature coefficient of resistance. In operation, the resistance of a selected current path is markedly reduced in contrast with the resistance of unselected current paths parallel to the selected path so that the parallel current paths do not experience joule heating. Electrical power saving and visual contrast result.

REFERENCES:
patent: 3393390 (1968-07-01), Louis
patent: 3411947 (1968-11-01), Block et al.
patent: 4055743 (1977-10-01), Conta et al.
patent: 4063211 (1977-12-01), Yasujima et al.
patent: 4099046 (1978-07-01), Boynton et al.
patent: 4104607 (1978-08-01), Jones

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