Patent ID: 7777161

Claim:
A heating device for heating air, said heating device comprising: multiple heat-generating elements, each heat generation element comprising at least one PTC element; electric strip conductors that lie on opposing sides of the PTC element and through which an electric current travels perpendicularly in use; at least one elongated injection molded plastic positioning frame that forms a frame opening for holding the PTC element and several heat-emitting elements arranged in parallel layers; and at least one ceramic layer that abuts and covers the strip conductors on exterior sides thereof facing away from the positioning frame, thereby electrically isolating the electric strip conductors from the heat emitting elements, wherein said heat-emitting elements are held so that they lie on opposing sides of the PTC element, and wherein the ceramic layer is sealed against at least long sides of the positioning frame by at least one compressible sealing bead, and wherein the at least one ceramic layer provides an abutment face against which the heat-emitting elements abut; wherein one of the electric strip conductors is secured within the positioning frame by injection molding the positioning frame around the electric strip conductor such that only a lateral portion of the electric strip conductor is surrounded by the injection molded plastic positioning frame.