Metallic film having applied flat electrical conductor and honeycomb body produced using said film

1. A metallic film ( 1 ) comprising:

a top side ( 2 );

a flat electrical conductor ( 14 ); and

a base insulation layer ( 17 ) configured to attach the flat electrical conductor ( 14 ) to the top side ( 2 ), the base insulation layer ( 17 ) having:

a cover layer ( 18 ) covering the conductor ( 14 ) in an electrically insulating manner,

wherein the film ( 1 ) has:

two edge regions ( 11 ), one on each of opposite sides of the film ( 1 ), without the electrical conductor ( 14 ) and without either the base insulation layer ( 17 ) or the cover layer ( 18 ), and

only a single inner edge region ( 13 ) of the film ( 1 ) configured such that only the single inner edge region ( 13 ) of the film ( 1 ) is thickened by the electrical conductor ( 14 ), the insulation layer ( 17 ) and the cover layer ( 18 ),

wherein the combined total thickness (D) of the electrical conductor ( 14 ), the base insulation layer ( 17 ) and the cover layer ( 18 ), is less than 80 μm, and

wherein the electrical conductor is shaped so as to only extend to a single edge of the film.

2. The metallic film ( 1 ) as claimed in claim 1 , wherein the film ( 1 ) comprises high-temperature-resistant steel and has a film width (FB) of 5 to 30 cm, a film thickness (d 1 ) of 20 to 100 μm, wherein the at least one edge region ( 11 ) of the metallic film ( 1 ) has a width of at least 0.5 cm.

3. The metallic film ( 1 ) as claimed in claim 1 , wherein the base insulation layer ( 17 ) and the cover layer ( 18 ) are configured so as to prevent electrical flashovers at voltages of 20 Volt to 72 Volt.

4. The metallic film ( 1 ) as claimed in claim 1 , wherein the film ( 1 ) is smooth or corrugated.

5. The metallic film ( 1 ) as claimed in claim 1 , wherein the flat electrical conductor ( 14 ) has a conductor length (LL), a conductor cross section (LQ) and a profile dimensioned so as to absorb electrical power of 500 to 5000 W during operation.

6. The metallic film ( 1 ) as claimed in claim 1 , wherein the flat conductor ( 14 ) has a conductor surface (LF) covering between 10 and 80% of the top side ( 2 ) of the film ( 1 ).

7. A honeycomb body ( 5 ) comprising:

a first end side ( 9 );

a second end side ( 10 ), the honeycomb body ( 5 ) being configured to permit gas flow through the honeycomb body ( 5 ) from the first end side ( 9 ) to the second end side ( 10 ) in a flow direction (S); and

a plurality of films, having:

at least one metallic film ( 1 ) as claimed in claim 1 ; and

at least one further smooth metallic film ( 3 ) and/or corrugated metallic film ( 4 ), wherein the honeycomb body comprises a coiling and/or alternately layering of the plurality of films ( 1 , 3 , 4 ), and wherein respective ones of the plurality of films ( 1 , 3 , 4 ) are connected to one another on at least one of the first and second end sides ( 9 , 10 ) of the honeycomb body ( 5 ) by soldered connection ( 19 ).

8. The honeycomb body ( 5 ) as claimed in claim 7 , wherein the at least one metallic film ( 1 ) with the flat electrical conductor ( 14 ) is a smooth film, which, together with at least one corrugated film ( 4 ), is arranged adjacent the smooth film, and having corrugation crests ( 6 ) and corrugation troughs ( 7 ), to form the honeycomb body ( 5 ) with channels ( 8 ) through which gas can flow, wherein, in the inner edge region ( 13 ) in which the smooth film ( 3 ) with the electrical conductor ( 14 ) and the insulations ( 17 , 18 ) thereof is thicker than in an edge region ( 12 ) of the corrugated film ( 4 ), the at least one corrugated film ( 4 ) has a corrugation height (h) reduced by said total thickness (D) such that, in the edge region ( 12 ) of the corrugated film ( 4 ) at the corrugation crests ( 6 ) and the corrugation troughs ( 7 ), metallic contacts with the edge region ( 11 ) of the smooth film ( 3 ) are produced and are connectable by soldered connections ( 19 ).

9. The honeycomb body ( 5 ) as claimed in claim 8 , wherein a plurality of smooth and corrugated films ( 3 , 4 ), of which at least one has an electrical conductor ( 14 ), are layered alternately on one another and interlaced with one another, to form the honeycomb body ( 5 ).