초록 ▼

A flat resistance heating device with a heating layer including of a material having a positive resistance/temperature coefficient to which current or voltage can be applied via electrodes. In order to reduce the current uptake in the switch-on phase and hence to reduce the risk of a burn-through ef

A flat resistance heating device with a heating layer including of a material having a positive resistance/temperature coefficient to which current or voltage can be applied via electrodes. In order to reduce the current uptake in the switch-on phase and hence to reduce the risk of a burn-through effect, the individual heating elements of the resistance heating device have a meniscus shape, so that they heat more rapidly in the narrow region when switched on and hence reduce the current uptake.

대표청구항 ▼

[ What is claimed as new and is desired to be secured by Letters Patent of the United States is:] [1.] A resistance heating device, comprising:a substrate;at least a first and second electrode arranged on a surface of said substrate;a heating layer comprising a plurality of PTC elements which extend

[ What is claimed as new and is desired to be secured by Letters Patent of the United States is:] [1.] A resistance heating device, comprising:a substrate;at least a first and second electrode arranged on a surface of said substrate;a heating layer comprising a plurality of PTC elements which extend between said at least said first and second electrode,wherein at least one of said plurality of PTC elements comprises a width which tapers continuously from a contact area with said first electrode to a center point between said first and second electrode, and subsequently broadens continuously to a contact area with said second electrode.