| 摘要 |
PURPOSE:To allow printing density to be variable according to a type of paper by providing a paper type identifying means, a heater and a blower and electrically controlling them on the basis of the temperature detection readings of a printing head. CONSTITUTION:If a control signal Si from a paper type identifying means 11 indicates 'paper' state (e.g. a photosensor is in 'non-operating condition' because of non-light transmission), a fan 9 and a heater 7 are set to 'low temperature L', while if the signal indicates 'OHP film' state (the photosensor is in 'operating condition' due to light transmission), the fan and heater are set to 'high temperature H'. Thus the fan and heater are controlled respectively. When controlling the heater 7, temperature data Tn from a temperature sensing means 8 are read after checking the elapse of one second to judge whether or not the temperature data thus obtained is lower than a set temperature. To control a blower 9, temperature data from the temperature sensing means 8 are read to interprete whether the data indicates a higher temperature than a set temperature. If it is higher, the blower 9 is set to 'drive ON', and if it is the blower 9 is stopped. In case the temperature is not lower, the blower 9 is left going as it is. |
