Patent ID: 6997093

Claim:
A cross web shear device for accurately shearing predetermined strips of material from a supply web traveling in a web direction, the cross web shear device comprising: a shear blade having a curved cutting edge positioned substantially perpendicular to the supply web and perpendicular to the web direction, the shear blade having at least one cam track therein, wherein the curved cutting edge has a first end, a second end and a middle section; a support blade positioned substantially parallel with the supply web and perpendicular to the web direction; and a blade actuator having at least one cam pin, the at least one cam pin cooperating with the at least one cam track to cause the shear blade to move through a rocking cutting motion when the blade actuator is actuated, the support blade and the shear blade positioned in a cutting relationship with one another to shear the predetermined strip of material when the shear blade moves through its rocking cutting motion such that the first end of the curved cutting edge cuts the web before the middle section of the curved cutting edge cuts the web, and the middle section of the curved cutting edge cuts the web before the second end of the curved cutting edge cuts the web.