Patent ID: 8671550

Claim:
A method of constructing a rupture disk, comprising the steps of: a) providing a disk blank having a peripheral flange and a concave convex portion that is surrounded by the peripheral flange; b) rotating the disk blank upon a turntable wherein the turntable engages the concave convex portion of the disk blank; c) during the rotating of step “b”, scoring the surface of the concave convex portion with a wire of a wire electrical discharging machine, said wire having an outer surface with a shape; d) wherein the score includes a shaped part, at least a portion of the shaped part having the shape of the outer surface of the wire; e) wherein the wire is advanced toward the disk central axis as the score is formed in steps “b” and “c”; f) wherein the wire is spaced away from the peripheral flange in step “d”; and g) wherein in steps “c” and “d” the wire is positioned generally parallel to a plane defined by the peripheral flange.