Electrical heating element for heating a plate and process for t

Details Electrical heating element for heating a plate and process for t Electrical heating element for heating a plate and process for t

1982-07-15

1984-09-11

Mayewsky, Volodymyr Y.

Electric heating

Heating devices

Combined with container, enclosure, or support for material...

219457, 219460, 219463, 219467, 338301, H05B 368

Patent

active

044712146

ABSTRACT:
An electrical heating element (18) for heating a plate, e.g. a glass ceramic plate (14) has a multilayer insulating support (12) in whose dish-shaped depression heater coils (18) are arranged in spiral form. The heater coils are located on the insulating support surface (17) and have downwardly directed deformations (19) comprising a turn pressed out in the downwards direction. These deformations (19) are embedded in the surface layer (16) of the insulating support, which is mechanically stronger and more thermally conductive than the underlying insulating layer (15). The deformations are produced in a mould (22, 23) carrying the heater coils in slots (21) and by means of a bladelike punch (24) a turn is pressed into a depression (25). The connection between heater coil (18) and insulating support (12) during the moulding thereof comprises a loose insulating material, the heater coil and deformations being placed in slots (27) of mould part (26).

REFERENCES:
patent: 1831889 (1931-11-01), Skutta
patent: 1921543 (1933-08-01), Schonfeld
patent: 3316390 (1967-04-01), Gaugler et al.
patent: 3567906 (1971-03-01), Hurko
patent: 3612828 (1971-10-01), Siegla
patent: 3833793 (1974-09-01), McWilliams et al.
patent: 4243874 (1981-01-01), Fischer

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