Patent ID: 7051911

Claim:
A method of cutting sheet material comprising the steps of: (a) engaging a first side of the sheet material with a first crack initiator having a high rake angle, the crack initiator extending from a first cutter base having a low rake angle; (b) simultaneously engaging a second side of the sheet material with a second cutter; (c) generating a first crack in the first side of the sheet material with the first crack initiator; (d) engaging the sheet material with the cutter base of the first cutter by moving the first cutter perpendicular to the sheet material; and (e) further propagating the first crack using a rake edge of the cutter base, thereby disengaging the first crack initiator of the first cutter from contact with the sheet material, the sheet material comprises a laminated web structure and the first crack initiator has a height that is greater than a thickness of a protective laminate or coating on the first side of the laminated web structure.