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US 8,287,220 B2Granted
Method and device for manufacturing peel-off lids
AssigneeSoudronic AG
InventorsMarcel Oberholzer, Peter Schreiber
Life of this patent
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Abstract
In the area of manufacturing peel-off lids (28) out of lid rings with a peel-off foil (25) sealed on it, a part of the sealing surface (26) is bent up in the direction of the lid edge in order to tension the sealing surface with the peel-off foil. A clamping tool (30, 31) is provided in order to clamp the sealing surface with the peel-off foil and a pressing tool (35) in order to bend up the unclamped sealing surface section (26′).
Claims9
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.
2 more elements
Dependencies are inferred from the claim text.