Thermal printer and ink ribbon used therewith

Details Thermal printer and ink ribbon used therewith Thermal printer and ink ribbon used therewith

1998-10-15

2000-07-11

Le, N.

Incremental printing of symbolic information

Thermal marking apparatus or processes

Density control

B41J 236

Patent

active

060880481

ABSTRACT:
A gradation correction data used in correcting the gradation of the printed image is recorded on the leader film of the ink ribbon in a form of optically readable marks. Then the ink ribbon is set in a thermal printer, the marks are read out by an optical sensor to obtain the gradation correction data. Then, the gradation correction of the image data to be printed is carried out by referring to the correction data thus obtained prior to the actual printing of the image data.

REFERENCES:
patent: 5185315 (1993-02-01), Sparer
patent: 5579090 (1996-11-01), Sasanuma et al.
patent: 5769549 (1998-06-01), Kouzai et al.
patent: 5853255 (1998-12-01), Soshi et al.

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