Patent ID: 8287220

Claim:
A method for manufacturing peel-off lids, in which first a lid ring is provided, having a flanging rim and a sealing surface joining its flanging rim slope, wherein the sealing surface borders the lid ring opening with its other end, and subsequently a peel-off foil is sealed onto the sealing surface, and wherein in order to tension the peel-off foil after the sealing step a section of the sealing surface following the flanging rim slope is clamped together with the peel-off foil between an upper and a lower clamping tool having flat clamping surfaces, and a section of the sealing surface which is free of the clamping tools is bent in a direction of the upper lid edge by means of a pressing tool, and wherein the said other end of the sealing surface is shaped as a rolled-in edge area and the pressing tool engages only this edge area.