Thermal printer and optical fixing device therefor

Details Thermal printer and optical fixing device therefor Thermal printer and optical fixing device therefor

1996-06-11

1997-05-13

Tran, Huan H.

Incremental printing of symbolic information

Thermal marking apparatus or processes

Multicolor

B41J 232, B41M 526

Patent

active

056297297

ABSTRACT:
A thermal printer for use with a thermosensitive recording sheet is provided with an optical fixing device which has at least a lamp to optically fix a thermosensitive color developing layer of the recording medium. The lamp extends across a transport path of the recording sheet such that an intermediate portion of the lamp where luminance is approximately uniform extends over a range exceeding a maximum width of the recording sheet. A photosensor is disposed on a lateral side of the recording sheet so as to receive electromagnetic rays from the intermediate portion of the lamp. A control device controls the quantity of electromagnetic rays generated from the lamp in accordance with an illuminance value detected by the photosensor, so as to maintain the illuminance of an illumination area in front of the lamp to be constant.

REFERENCES:
patent: 5486856 (1996-01-01), Katsuma et al.
patent: 5565903 (1996-10-01), Ueda

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