Data latching for preheat and print control in a thermal printer

Details Data latching for preheat and print control in a thermal printer Data latching for preheat and print control in a thermal printer

1988-12-16

1991-01-08

Wiecking, David A.

Typewriting machines

Typing by other than type-face or type-die

Thermal

346 76PH, B41J 238, B41J 2355

Patent

active

049830546

ABSTRACT:
A thermal printer is comprised of a buffer RAM for storing print data, a thermal head, and a CPU for controlling the feed of current to the thermal head. The thermal head includes a number of heating resistor elements. When current is fed to the heating resistor elements during a print period, the heating resistor elements of the thermal head are heated to color a thermosensible paper. The CPU controls a current feed period of the thermal head during the present print period in accordance with both the present print data stored in a buffer RAM and the print data in a previous print period preceding to the present print period.

REFERENCES:
patent: 4415908 (1983-11-01), Sugiura
patent: 4492482 (1985-01-01), Eguchi
patent: 4560988 (1985-12-01), Moriguchi
patent: 4560993 (1985-12-01), Hakoyama
patent: 4568817 (1986-02-01), Leng
patent: 4673952 (1987-06-01), Setoyama
patent: 4748455 (1988-05-01), Mori

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