Patent ID: 8857056

Claim:
A method of manufacturing an exhaust gas carrying device, in particular an exhaust gas purification device, which has a tubular outer housing with an insert clamped therein, comprising the following steps: a. providing a tool having a plurality of jaws which are adapted to be moved inwards against the outer housing, and wherein the jaws extend axially beyond a length of the outer housing; b. providing an indentation or a projection on an inside of each jaw, with indentations or projections of all jaws being oriented in relation to each other such that a continuously surrounding indentation or a continuously surrounding projection is obtained; c. placing the outer housing and the insert positioned therein into the tool by positioning the outer housing between two axial stops before the laws are moved inwards; d. deforming the outer housing by closing the jaws to clamp the insert in the outer housing such that the outer housing directly contacts the axial stops after deforming; and e. producing a surrounding projection or a surrounding indentation on the outer housing remote from ends of the outer housing when closing the jaws.