Patent ID: 8307483

Claim:
A process for producing a shoe upper, which comprises an outer material and a waterproof functional layer, arranged on the inner side of the outer material, with the upper having a lower end, comprising the steps: providing an outer material piece cut in the form of the upper; providing a functional-layer piece cut in the shape of the shoe upper in such a way that a lower end region of the functional-layer piece has a functional layer zone that is not covered by the outer material after the functional-layer piece has been arranged in the correct position on the inner side of the outer material piece, wherein the functional layer comprises a lower edge; joining the lower edge of the outer material piece across its entire periphery to an upper longitudinal side of a connecting band consisting of liquefiable sealing material or of material through which liquid sealing material can flow; providing the connecting band, at points of curvature of the lower end of the upper, with an arcuate shape corresponding to the local radius of curvature, with different degrees of curvature of the two longitudinal sides of the connecting band, in such a way that, for an arc sector lying in the respective curvature, with a predetermined unitary sector angle, the arc lengths of the two longitudinal connecting band sides belonging to this arc sector differ from each other the more the greater the curvature of the arc sector is, wherein the connecting band comprises a lower longitudinal edge, further wherein the lower edge of the functional layer ends above the height of the lower longitudinal edge of the connecting band.