Patent ID: 7476825

Claim:
A process for producing a body for exhaust gas treatment, the process comprising the following steps: forming a plurality of metallic layers with a supporting structure having a filter material, with passages through which a gas stream can at least partially flow, with folds, and with supports placed in at least one of the passages or the folds; bringing a plurality of the metallic layers into contact with one another in a connection region; producing a connection of the layers by a continuous resistance welding process, causing the layers to form the passages; carrying out the continuous resistance welding process as roller seam welding at a feed rate in a range of from 0.5 m/min to 30 m/min with electrodes exerting a force of from 200 N to 6 KN on the layers; and connecting the supports to the layer at the same time as connecting the layers to one another.