Heating element energization method for a thermal printer

Details Heating element energization method for a thermal printer Heating element energization method for a thermal printer

1992-08-25

1995-09-26

Tran, Huan H.

Incremental printing of symbolic information

Thermal marking apparatus or processes

Preheating

B61J 238

Patent

active

054537762

ABSTRACT:
A method for controlling the energization of a thermal printing heating element by a succession of current impulses (I) separated according to a printing raster is described. The current impulses (I) upon exceeding a pre-given energy content effect a printing event and in the case of falling below this energy content effect a preheating. At each raster time point (t1) the printing requirement is ascertained for a predetermined number of yet to follow raster time points (t2, t3) and for raster time points (t2, t1) without printing requirements and lying in advance of a raster time point (t3) with a printing requirement the current impulses (I1, I2) are progressively increased. Through the use of this method a thermal printer with a high printing speed is achieved.

REFERENCES:
patent: 4859093 (1989-08-01), Plotnick

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