Method of perforating a nonlinear line of weakness

A method of perforating a web, the method comprising:

• rotating a cylinder comprising a longitudinal cylinder axis and at least one smooth-edged anvil having a profile of a continuous, sinusoidal shape that comprises more than one wavelength, the anvil comprising a plurality of anvil segments, the anvil segments being spaced radially about an outer surface of the rotating cylinder, wherein the anvil is helically mounted on the rotating cylinder at an angle of greater than 0 degrees to 45 degrees to the longitudinal cylinder axis, wherein each of the anvil segments are removable independent of one another, and wherein each of the anvil segments are adjustable independent of one another on the outer surface of the rotating cylinder to raise or lower the anvil segments independently;
• operatively engaging a support with the cylinder, wherein the support is moveable with respect to the cylinder;
• positioning a blade disposed on the support so as to cooperate in contacting relationship with the anvil, wherein the blade is substantially parallel to the longitudinal cylinder axis, and wherein the blade comprises a plurality of blade segments and each blade segment comprises a plurality of teeth, each tooth having a flat top portion and a tooth length across the flat top portion, and wherein adjacent teeth are separated by a recessed portion;
• feeding a web between the cylinder and the support while the blade cooperates in contacting relationship with shaped anvil to perforate the web.