Patent ID: 7520153

Claim:
A method for manufacturing a bursting disk from a sheet or foil, wherein the bursting disk has an edge for clamping the bursting disk in a clamping device and a middle region enclosed by the edge, with the following manufacturing steps: the sheet or foil is clamped with a first portion forming the future edge of the bursting disk, said first portion defining a second portion which corresponds to the future middle region of the bursting disk, a third portion is defined, which is located within the second portion of the sheet or foil, a part of the second portion enclosing the third portion of the sheet or foil is clamped completely by means of a pair of clamping jaws or female dies, the sheet or foil is deformed for a first time in the third portion, the third portion being located within the second portion, which remains undeformed, the sheet or foil is deformed in the second portion, and the sheet or foil is deformed one more time in the third portion, in order to cancel the result of the first deformation in this portion for the eyes of a viewer.