Thermal recording apparatus

Recorders – Thermal recording

Patent

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Details

219216, 400120, G01D 1510

Patent

active

043608191

ABSTRACT:
Disclosed is a thermal recording apparatus comprising: a plurality of aligned thermal resistive elements; a plurality of drive elements, each serially connected to the thermal resistive elements, for driving the thermal resistive elements; a DC power source connected in parallel with the thermal resistive elements and the drive elements and having a smaller current capacity than the necessary current to simultaneously drive all the thermal resistive elements; a capacitor having a large capacitance connected, in parallel, to the DC power source; a detecting means for detecting the voltage across the capacitor and comparing it with a predetermined voltage; and, a limiting means for limiting the number of the thermal resistive elements simultaneously driven when the detected voltage falls below the predetermined voltage.

REFERENCES:
patent: 3934695 (1976-01-01), Kovalick
patent: 4113391 (1978-09-01), Minowa
patent: 4168421 (1979-09-01), Ito

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