| 摘要 |
1. Methof of manufacturing a flat heating element (5) with a fuse (7'; 7") against over-heating, whereby a foil (1) is rolled from electrical resistance material, the said foil being cut into a - for instance - serpentine pattern of interconnected resistance strips which is embedded in or applied on an insulating body, characterised in this, that paths, wires or similar formations of use material (2) of tin or a lead-tin or lead-tin-antimony or lead-bismuth alloy are, in a prescribed pattern, applied on or inserted in the foil of resistance material (1) made of a lead-antimony alloy, that the foil is rolled out in a uniform thickness in a further operation, that the foil composed of resistance material (1) and rolled-in fuse material (2) is cut so as to produce a predetermined pattern of interconnected resistance strips each of which incorporates at least one thermal fuse (7'; 7") of fuse material (2) at predetermined places. |
