Patent ID: 8117882

Claim:
A method for manufacturing a multi-layer pipe by means of a bending roller, comprising: placing individual material layers to be combined into the multi-layer pipe one material layer upon the other material layer, creating a first connection between the material layers in a first position, shaping the material layers into a pipe by means of the bending roller, wherein a constant friction-tight connection is created between the material layers as a result of the pressure of the bending roller, and wherein the material layers shift freely with respect to each other during shaping due to the different bending radii of the one material layer acting as an internal pipe and the other material layer acting as an external pipe, creating at least one other connection between the material layers after a predetermined shaping progress by connecting the material layers to each other in at least one other position, and finish-shaping the multi-layer pipe, such that the material layer acting as an internal pipe is pressed non-positively into the material layer acting as an external pipe.