| 摘要 |
PURPOSE:To prevent deterioration of printing quality attributable to the generation of uneven accumulation phenomenon in a substrate by estimating the temperature distribution of a substrate with a thermal head and cooling each prearranged division of the substrate using a mutually independent cooling power. CONSTITUTION:A thermal head 1 is mounted in straight line on the upper surface of a ceramic substrate 2, and thermometers (thermister, etc.) 111, 112, 113 are inserted into apertures on the sides of the substrate 2. Fans 41, 42, 43 and an airflow control circuit 12 are provided right under the substrate 2 together with an AC power supply 14, a switching circuit (SCR) 15 and a phase control circuit 16 incorporated in the device. |
