Patent ID: 6563093
Filing Date: 2003-05-13
Classification: B28B,C04B,F23Q,H05B

Abstract:
A ceramic pin heating clement comprising:a housing; a connector arrangement; a first body injection molded from a first injection-moldable ceramic composite compound having a first electrical resistance; and a second body injection molded from a second injection-moldable ceramic composite compound having a second electrical resistance about the first, wherein a compound body is formed by the second body injection molded about the first body, and wherein the compound body is sintered; wherein: the first electrical resistance and the second electrical resistance differ, one of the first body and the second body is a heating conductor having a negative pole and a positive pole, the second body is an insulator if the first body is the heating conductor, and the first body is the insulator if the second body is the heating conductor, the negative pole has a first lower section disposed in the housing, and a generally semi-cylindrical upper section projecting from the housing, the positive pole has a second lower section disposed in the housing, and a generally semi-cylindrical upper section projecting from the housing, the housing forms an annular casing around the first and second lower sections of the negative pole and the positive pole and around at least a portion of the insulator, and the connector arrangement and the housing are electrically connected to the positive pole and the negative pole.