Recording density correcting apparatus

Details Recording density correcting apparatus Recording density correcting apparatus

1989-08-01

1992-04-28

Fuller, Benjamin R.

Recorders

Thermal recording

400120, 358298, B41J 2325

Patent

active

051092352

ABSTRACT:
A recording density correcting apparatus in a recorder for performing a recording operation at a multiple gradation by a thermal head having a plurality of heating resistors. The apparatus has a counting device for counting a level frequency with respect to the number of pulses applied to the heating resistors, a heating amount calculating device for calculating the heating amount of the heating resistors by the counted value provided by the counting device, and a pulse control device for controlling the pulse width or the number of pulses applied to the heating resistors by the heating amount calculated by the heating amount calculating device such that the recording density becomes constant.

REFERENCES:
patent: 4535340 (1985-08-01), Moriguchi et al.

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