Radiant electrical heater, as well as method and apparatus for the manufacture thereof
AssigneeE.G.O. Elektro-Gerate Blanc u. Fischer
InventorsGerhard Gossler, Eugen Wilde
Life of this patent
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Abstract
A method for the manufacture of a radiant electrical heater, intended more particularly for heating glass ceramic hotplates, comprises so inserting or pressing helical heating resistors in helical slots in a support, such that the support or the heater coils themselves are deformed and consequently fixed to the support. The coils penetrate the wall or bottom areas of the slot or are otherwise secured by parts of the support by positive engagement. An apparatus for performing the method has a tool with ribs which deforms the support or heater coils for positive engagement. A radiant heater is obtained, whose support has partly overlapping deformations in the slot area of the heater coils.
Claims9
A method for manufacturing a radiant electrical heater, wherein a support is made from an electrically and thermally insulating material and slots are formed therein for receiving helical heating resistor coils, comprising the further step of deforming at least one of the support and the heater coils, while the support is in a prehardened condition, whereby portions of the support will at least partially surround portions of the heater coils for securing the heater coils in the slots.
Dependencies are inferred from the claim text.