A HEATING DEVICE
A heating device for food preparing purposes, primarly cooking pots and grill tables in large kitchens and the like includes electrical resistor elements adapted to supply thermal energy to a surface to be heated, such as the outer surface of a cooking pot and the underside of a grill surface or table. According to the invention the resistor elements (2-5) comprise resistor filaments in the form of an electrically conductive foil, which is vulcanized firmly to the aforementioned surface (12; 13) with the aid of a thin layer of a vulcanizable rubber material. In accordance with one embodiment, when the heating device is a cooking pot (1) the foil is applied to the peripheral surface (12) of the cooking pot (1) in the form of strip-like elements (23, 24, 25) which extend around the pot in superposed relationship from the bottom (13) thereof. An element (35) is also provided on the bottom (13) of the pot, and covers substantially the whole of the pot bottom.