Recorders – Performance of multiple functions of steam and gas engines – Pressure responsive element
Patent
1987-03-06
1988-03-15
Goldberg, E. A.
Recorders
Performance of multiple functions of steam and gas engines
Pressure responsive element
346 76PH, 400120, G01D 1510, B41J 320
Patent
active
047316187
ABSTRACT:
In the prior art thermal recording systems heat resistor elements incorporated in a thermal head are controlled in the unit of dots, and a large volume of electric current is needed specially when the electric current is simultaneously applied on a large number of heat resistor elements in one line. This necessitates an expensive power source device for the system. The present invention method can reduce electric current to be fed to the thermal head as it drives several blocks of the thermal head at one time to thereby achieve recording of one line of data at a higher speed because this method comprises the steps of dividing a plurality of heat resistor elements of the thermal head into several blocks, counting the number of recording heat resistor elements in each of the blocks, summing the number of the recording heat resistor elements in plural blocks sequentially from the first block, and applying electric current on plural blocks at the same time in a manner that the summed number is not more than a predetermined value.
REFERENCES:
patent: 4216481 (1980-08-01), Hakoyama
patent: 4454516 (1984-06-01), Moriguchi et al.
patent: 4475112 (1984-10-01), Washio et al.
Fuji Photo Film Co. , Ltd.
Goldberg E. A.
Preston Gerald E.
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