Lamp temperature control device suitable for color direct therma

Details Lamp temperature control device suitable for color direct therma Lamp temperature control device suitable for color direct therma

1995-10-13

1996-10-15

Tran, Huan H.

Incremental printing of symbolic information

Thermal marking apparatus or processes

Multicolor

362294, B41J 2315, B41J 232

Patent

active

055659039

ABSTRACT:
A color direct thermal printer has a yellow fixing ultraviolet lamp and a magenta fixing lamp, each having a longitudinal axis. Behind the yellow fixing lamp is disposed a reflector which has portions contacting the yellow fixing lamp in the longitudinal direction for receiving heat from the yellow fixing lamp. The yellow fixing lamp and the reflector is contained in a cylindrical housing of a channel shape with cooling fans which are respectively mounted on opposite ends of the housing. Outside the reflector, a pair of temperature sensors are mounted to be close to the respective fans, and each measure tube temperature of the yellow fixing lamp at right and left sides indirectly through the reflector. If measured temperature greater than 40.degree. C. is measured by at least one of the sensors, corresponding at least one of the fans is driven to send air to the yellow fixing lamp. The magenta fixing lamp is arranged in a same manner as the yellow fixing lamp. When the measured temperature becomes less than or equal to 40.degree. C., the driving of the fan is stopped. Further, if the measured temperature is less than 30.degree. C. at the time of operating a starting key, at least one of the lamps is caused to pre-emit light to raise the tube temperature.

REFERENCES:
patent: 4835667 (1989-05-01), Wolfe

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