Patent ID: 7858039

Claim:
A tissue piece treating apparatus having a structure in which a treatment liquid or molten paraffin for treating a tissue piece accommodated in a cassette is stored in a bath inside in a treating bath, the tissue piece is soaked in the stored treatment liquid or molten paraffin, and the bath inside is irradiated with an ultrasonic wave from an ultrasonic vibrator fixed to or brought into contact with an external wall outside the treating bath to promote the impregnation of the treatment liquid or molten paraffin into the tissue piece or to promote the treatment of the tissue piece; wherein the tissue piece treating apparatus comprises an input means for setting the temperature of the treatment liquid or molten paraffin stored in the bath inside at a desired maintenance temperature, an automatic controlling means for feeding back the actual temperature of the treatment liquid or molten paraffin stored in the bath inside detected by a temperature sensor to switch a heating mode and a cooling mode alternately, thereby maintaining the temperature of the treatment liquid or molten paraffin stored in the bath inside at a desired maintenance temperature, a heating means for turning OFF in an air-cooling fan of the ultrasonic vibrator and ON in a plane heater at the heating mode, thereby transferring the heat generated by the ultrasonic vibrator and the plane heater to the bath inside to heat the bath inside, and a cooling means for turning ON in the air-cooling fan of the ultrasonic vibrator and OFF in the plane heater at the cooling mode, thereby blocking the heat transfer from the ultrasonic vibrator and the plane heater to the bath inside to cool the bath inside; and wherein the tissue piece treating apparatus has a function of suppressing excessive heating of the tissue piece to suppress the heat modification of the tissue piece, by performing automatic control for maintaining the temperature of the treatment liquid or molten paraffin stored in the bath inside at a desired maintenance temperature by automatically switching the heating mode and the cooling mode.