FIELD: electricity.
SUBSTANCE: method to manufacture a heating element comprising a body, a coal resistive element placed inside the body, current conductors, in which the coal resistive element is made in the form of a resistive cloth, comprising coal threads, cords or tapes with current conductors, which are placed and fixed between layers of flexible electric insulating materials, besides, a volume heating element is formed from the cloth, the electric insulating coating is hardened to form a rigid volume heating element. The profile of the resistive heating element has a trapezoidal, rectangular, sinusoidal or triangular shape.
EFFECT: reliability improvement.
7 cl, 5 dwg
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