| 摘要 |
<p>The invention concerns a heating element (1) for generating heat when connected to an electrical power source comprising a first feedline (2) and a second feedline (2a) extending generally along opposite longitudinal sides of the heating element (1), each feedline (2, 2a) comprising an electrical contact point to an electrical power source, each feedline (2, 2a) distributing the electrical power supply along it, at least a layer of resistive material (3) being sandwiched between the two feedlines (2, 2a), its width (w) being delimited by the feedlines (2, 2a), an electrical current flowing from the first feedline (2) to the second feedline (2a) in operation through the layer of resistive material (3) and thereby dissipating heat, characterized in that the layer of resistive material width (w) varies in function of the length coordinate (x) of the heating element (1).</p> |
