I. G. Bauerhin Gmbh

Josef Hilmer

A flexible surface heating element, particularly for seat heaters, having a heating field of conductive fibers electrically connected to at least one contact strip. The contact strip contains a portion of conductors in the form of steel filaments and a portion of conductors in the form of filaments of a higher conductivity than that of the steel filaments. The two types of conductors are electrically interconnected and affixed by means of a yarn on a textile band, the conductors of higher conductivity extending above and/or under the steel filament conductors and being electrically connected to the steel filament conductors. A method for producing the flexible heating element is also provided.

Flexible surface heating element, particularly for seat heaters, and method for producing a flexible heating element

A three-dimensional heating element particularly intended for use in a steering-wheel. The three-dimensional heating element includes a heating composite having a heating element bonded between two films, one or both of which includes a heat shrinkable material. A covering material is placed over the heating composite. The film closest to the covering material includes a plastic material which forms a barrier preventing gaseous, liquid and/or solid chemicals from attacking the heating conductor when the heating element is applied to the steering-wheel. A foam material may be introduced in the space between the composite and covering material.

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Gruendau, Germany

Josef Hilmer