Electric heating unit
First Claim
1. An electrical heating unit for a body to be heated, said heating unit comprising:
- a support made from an insulating material;
a heating resistor arranged on said support to form a unit, said heating resistor being made from a polymer paste constituting a compound layer of said support and containing graphite, wherein said support is at least partly formed by a paper-like particle-containing substrate, and said heating resistor contains a mixture of silver and graphite.
1 Assignment
0 Petitions
Accused Products
Abstract
In an electric heating unit (1), at least one heating circuit of a heating resistor (2) is arranged as a coated or printed conductor track and is consequently arranged by means of an adhesive joint (16) on a support (3) made from a high temperature-resistant synthetic paper. The unit is fixed, on its bare side remote from the heating resistor and by means of a whole-surface adhesive joint (13), directly to the associated reception side (11) of the body (10) to be heated. The adhesive joint (13) is appropriately formed by an adhesive layer (14) of silicone resin adhesive or the like, or a self-adhesive layer with a thickness of a few tenths of a millimeter and which permanently in stress-compensating manner has roughly the same thermal stability as the support (3). At least one heating circuit can be switched by means of a mechanical temperature switch with high switching hysteresis.
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Citations
36 Claims
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1. An electrical heating unit for a body to be heated, said heating unit comprising:
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a support made from an insulating material; a heating resistor arranged on said support to form a unit, said heating resistor being made from a polymer paste constituting a compound layer of said support and containing graphite, wherein said support is at least partly formed by a paper-like particle-containing substrate, and said heating resistor contains a mixture of silver and graphite. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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26. Any electrical heating unit for a body to be heated, said heating unit being a premanufactured assembly adapted for direct mounting to the body to be heated and comprising:
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a support; and
,a heating resistor arranged on said support, the support having outer boundaries, and within said outer boundaries said support has at least one venting opening forming an open through-opening extending through the electrical heating unit, the through-opening permitting escape of air during mounting of said heating unit on said body to be heated said at least one venting opening being located adjacent to the heating resistor and in at least one of said arrangements provided by a substantially parallel orientation of the venting opening to at least one adjacent portion of the heating resistor, and the location of the venting opening being between adjacent portions of the heating resistor. - View Dependent Claims (27, 28)
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29. An electrical heating unit for a body to be heated, said heating unit comprising:
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a support; and
,a heating resistor arranged on said support, said heating resistor forming a prefabricated constructional unit with said support, and electric leads for said heating resistor, connecting heads of said leads passing through the support and defining free end faces, said constructional unit being adhesively fixed as an entity by means of an adhesive joint layer to the body to be heated, wherein said adhesive joint layer is provided on a surface including said end faces of said connecting heads.
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30. An electrical heating unit for a body to be heated, said heating unit comprising:
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a support; and
,a heating resistor arranged on said support, wherein the heating device with the heating resistor remote from the body to be heated is provided laterally outside a heated field with part-surface adhesive joints, arranged in the manner of spacers, for fixing to a basic support surface and located on the side of the support remote from the body to be heated.
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31. An electric heating unit for a body to be heated, said heating comprising:
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a support; and
,a heating resistor arranged on said support, wherein the heating resistor has at least two heating circuits distributed substantially over a same area to be heated, the at least two heating circuits having a substantially different rated capacity, at least one of the heating circuits being switchable independently from the other by means of a switch. - View Dependent Claims (32, 33, 34)
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35. Any electrical heating unit for a body to be heated, said heating unit comprising:
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a support; and
,a heating resistor arranged on said support, and wherein the body to be heated is fixed to a basic support body member by an adhesive joint provided on the heating device, said basic support body member being adapted for supporting the body to be heated, said heating device constituting an intermediate bearing and support member for providing a sole support connection between the body to be heated and the basic support body member.
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36. An electrical heating unit for a body to be heated, said heating unit comprising:
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a support; a heating resistor arranged on said support, and wherein ends of a layer providing said heating resistor form flat connecting ends, connecting heads penetrating said connecting ends and said support, and having terminal faces substantially entirely flush with an associated surface of said heating resistor and said connecting ends, said surface being remote from said support.
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Specification