Heating tool

A heating tool comprising:

• a cartridge including heater assembly, sleeve and tip, said tip having a hollow cylindrical proximal end, a middle section having an axial bore, and a distal end;
• said heater assembly including a heater coil having a proximal end wire and an end wire extending distally from said heater coil to a thermocouple sensor sized to fit the inside diameter of said axial bore of said middle section, said heater coil secured in said hollow cylindrical proximal end of said tip with a dielectric insulating adhesive and said thermocouple sensor fitted into and then secured within and deformed together with said middle section of said tip whereby said thermocouple sensor is deformed together with said axial bore whereby the peripheral surface of said thermocouple sensor is in intimate contact with said axial bore of said middle part of said tip;
• a return wire extending from said thermocouple sensor through said heater coil to a proximal end of said cartridge;
• said return wire formed from a nickel or nickel alloy material and said heater coil and end wire formed from an iron-chromium alloy, said return wire welded to said end wire to form said thermocouple sensor;
• a connecting wire attached to said proximal end wire of said heater coil, said connecting wire having a diameter between 0.8 mm and 1.2 mm and said proximal end wire of said heater coil having a diameter between 0.2 mm and 0.45 mm.