| 摘要 |
PROBLEM TO BE SOLVED: To provide a sheet-form heat generator having a wiring pattern which generates a uniform temperature distribution and allows easy adjustment of the Watt density. SOLUTION: On an insulative board 1, a first 2 and second electrodes 3 are parallel installed in the crosswise direction, and three electric conductors 4, 5, 6 in the form of a combination of a straight part and an S-curved part continued to the straight part are furnished between the two electrodes 2 and 3 in the vertical direction, wherein the conductors 4, 5, 6 constitute one block X, and a plurality of such blocks X are arranged in parallel between the electrodes 2 and 3. Adjustment of the Watt density and/or decrease of the temp. difference between the central part and peripheral zone are made by cutting one of the conductors 4, 5, 6 or enlarging the resistance value of the conductor 5 in the central part of one block X. |
