Curved zipper, method of applying a curved zipper, assembly set and production tool for a zipper

A method of applying a curved zipper to a flat element, comprising:

• permanently fastening an insulated curved zipper having two zipper chains extending adjacent to one another in a longitudinal direction in a zipper plane in a fixed manner to a flat element so that the fastened zipper is opened and the flat element is cut through between the opened zipper chains, wherein the zipper is made curved in the zipper plane in at least one curve portion and there is arranged at each of the two zipper chains in each case at least one carrier tape cut in a plurality of times transversely to the longitudinal direction, and wherein at least one fastening tape fixing the curved shape of the zipper in the zipper plane in a permanent manner in the curved state is arranged in the at least one curve portion along each carrier tape.

A multipart production tool for a curved zipper, comprising:

• a curved fixing tool having a curved groove, a width of which is adapted to a distance between two zipper chains and which has a radius of curvature of between 10.5 cm to 13.5 cm, and a plate having a curved groove, the radius of curvature of which corresponds to the radius of curvature of the fixing tool.