THERMAL RECORDING DEVICE

PURPOSE:To shorten a warming-up time upto a normal operating state and eliminate a density unevenness in a linear direction by driving for instance, two heater systems simultaneously or driving a heater with a larger heat generating ability during a warming-up operation, and selecting the blowing direction of an air blower each time a fixed temperature is reached. CONSTITUTION:A warming-up time is shortened by driving two heater systems 6a, 6b in a larger heat generating state during a warming-up operation than during a normal operation. After the warming-up operation, the ambient temperature of a thermal head is kept at near a set temperature T2 by controlling the switching ON/OFF of the heater 6b with the set temperature used as a target temperature. In the meantime, a temperature controller drives blower fans 8a, 8b to a normal rotating direction. Consequently, an atmospheric air is taken into a heat sink 7 from an direction A, and when the temperature becomes lower than Ta, the temperature controll stops driving the blower fans 8a, 8b. When the ambient temperature of the thermal head exceeds T2 again, the temperature controller drives the blower fans 8a, 8b to a rotating direction. Consequently, an atmospheric air is introduced into the heat sink 7 from a direction B.