Patent · US Expired

Electrical heating element for heating a plate and process for the production thereof

US4471214A · kind A · utility

15Cited by

7References

11Claims

0Family size

Assignee

E.G.O. Elektro-Gerate Blanc u. Fischer · DE

Inventors

Gerhard G/o/ ssler · Oberderdingen, DE
Eugen Wilde · Knittlingen, DE
Bernhard Mikschl · Eppingen, DE

Key dates

Filing date	Jul 15, 1982
Grant date	Sep 11, 1984
Priority date	—
Expiry date	Jul 15, 2002

Classification

Technology area (CPC H)Electricity
CPC primaryH05B2203/017
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

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).

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.