Method and device for controlling a thermal printing head

Details Method and device for controlling a thermal printing head Method and device for controlling a thermal printing head

1987-05-28

1988-12-06

Goldberg, E. A.

Recorders

Performance of multiple functions of steam and gas engines

Pressure responsive element

346 76PH, 400120, G01D 900

Patent

active

047898704

ABSTRACT:
A thermal series type printing head is controlled on-the-fly, during a succession of cycles of a duration at most equal to the time for printing the points, so as to be heated independently during the first half and during the second half of each cycle. Thus an offset dot can be printed of half a length of a a normal dot, or an extended dot, one and half times as long as the normal dot, for improving the definition of printing without reducing the writing speed. The invention applies to printing systems, particularly for printers connected to word processing devices.

REFERENCES:
patent: 4262188 (1981-04-01), Beach
patent: 4309712 (1982-01-01), Iwakura
patent: 4473829 (1984-09-01), Schouhamer Immink et al.
patent: 4540295 (1985-09-01), Okunishi et al.
patent: 4636810 (1987-01-01), Asakura et al.

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