Method and arrangement for application of electrically conductive layers with a high current carrying capability for making internal contact with channels

A method for applying electrically conducting layers having high current carrying capacity to walls of channels of an electric resistance heating element, the channels being configured to receive a medium to be heated flowing therethrough and being arranged in a honeycomb structure, and adjacent electrically conducting layers mutually communicating with electrically conducting end-face metallizations of the resistance heating element and having, respectively, at an opposite end, an insulation region in relation to another respective end-face metallization, the method comprising:

• immersing a miniature lance into a channel to be coated, the miniature lance corresponding to an inner shape of the channel with a cross section that is smaller than a cross section of the channel by at least a thickness of the layer to be applied, the miniature lance being hollow, closed at a lower end, having an upper end communicating with a reservoir filled with a metal paste, and including outlets in a lower region that are directed to inner walls of the channel;
• and
• uniformly applying metal paste to the inner walls of the channel by pressure through the outlets while simultaneously moving the miniature lance.

An arrangement for applying electrically conducting layers having high current carrying capacity to walls of channels of an electric resistance heating element, the channels being configured to receive a medium to be heated flowing therethrough and being arranged in a honeycomb structure, and adjacent electrically conducting layers mutually communicating with electrically conducting end-face metallizations of the resistance heating element and having, respectively, at an opposite end, an insulation region in relation to another respective end-face metallization, the arrangement comprising:

• a first miniature lance corresponding to an inner shape of a channel with a cross section that is smaller than a cross section of the channel by at least a thickness of the layer to be applied, the miniature lance being hollow, closed at a lower end, having an upper end communicating with a reservoir filled with a metal paste, and including outlets in a lower region that are directed to inner walls of the channel.