CARTRIDGE HEATER WITH MOISTURE RESISTANT SEAL AND METHOD OF MANUFACTURING SAME

摘要

A cartridge heater and method of manufacturing same. In one embodiment, the cartridge incudes a sheath having a first end and a second end. The first end of the sheath forms a seat. An elastomeric bushing is swaged against the seat such that it forms a mechanically bonded seal substantially preventing moisture egress into the cartridge heater. A heating element is also disposed in the sheath and is connected to leads protruding from the bushing. The heater includes crushable insulation material disposed within the sheath.