Heating element for a water-bed
AssigneeFaber Electronics B.V.
InventorAbram Jan Boertjens
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Abstract
A heating element for heating a water-bed comprising a metal support plate having a high coefficient of thermal conductivity, a heat source attached to the metal support plate and having an electrically resistive conductor which emits heat when electricity passes through it, and an electrical insulator for insulating the heat source from the metal plate.
Claims4
Heating element for heating a water-bed, said heating element comprising a metal support plate with a high coefficient of thermal conductivity, a heat source attached to the metal support plate, said heat source comprising an electrically resistive conductor which emits heat when electricity passes through it, and an electrical insulator for insulating the heat source from the metal plate, characterized in that, said electrical insulator for insulating the electrically resistive conductor from the metal plate is a layer of vitreous insulating material with a very high electrical resistance is screen-printed on the metal support plate, and in that the electrically resistive conductor is screen-printed on said vitreous insulating layer.
Heating element according to one of the preceding claims, characterized in that the vitreous insulating layer has a thickness of between 0.4 and 1 mm.
Dependencies are inferred from the claim text.