Patent ID: 8281694

Claim:
A method for adjusting a height of a circular slitter blade which slits a corrugated board web traveling continuously along a traveling direction of the corrugated board web while the corrugated board web being interposed between a receiving roll and the circular slitter blade, comprising the steps of: rotating the slitter blade and the receiving roll such that an outer circumferential surface of the slitter blade and the receiving roll move in the same direction as the traveling direction of the corrugated board web, the slitter blade having a center that is located on a downstream side of a center of the receiving roll in the traveling direction of the corrugated board web; emitting a light beam in a width direction of the corrugated board web to pass through a contact point of the outer circumferential surface of the receiving roll with the corrugated board web; determining a height of the slitter blade at which the circular outer edge of the slitter blade intercepts the light beam while moving the slitter blade toward the receiving roll; and setting the height of the slitter blade to the determined height as a slitting position.