Scully, Scott, Murphy & Presser
PTC electric heating element assembly
 An improved PTC electric heating element assembly comprises a heating element of a ceramic material with positive temperature coefficient, two insulating elements with different thickness, and four metal sheets, which are arranged in a stack to firmly join together by a fastening means fixed on the bottom of a container. The opposite sides of the heating element are contacted by metal sheets having electrodes which are connected to electric wires to effectively conduct the heat produced to the container. 
Industrial Technology Research Institute
H A
H05B A47J
inventional inventional
Suh-Yuh Ching-Iuan Yun-Tien Pin-Win
Cheng Sheu Chen Kauo