Permanent lod, and heating device for effectively transferring heat to the permanent lod

A heating device capable of heating a rod for permanent wave electrically and effectively comprising:

• a housing enclosed by a peripheral frame and opened upward;
• an insulating plate installed on the bottom of the housing;
• a plate-type heater installed on the top side of the insulating plate to be heated via applied electric power, said heater being installed between protecting plates;
• an electrical-heating plate electrically and directly heated from the heated plate-type heater;
• numbers of heating rods fitted onto the electrical-heating plate to be directly heated from the plate-type heater, said heating rod being finished on a surface identical with the lower side of the electrical-heating plate;
• and
• said heating rod being formed with numbers of heat-transferring holes on the outside of the same, air in the heat-transferring hole being heated by transferred heat, and the heated air being discharged from the hole to heat the inside of the rod for permanent wave inserted into the heating rod.