Patent ID: 7854428

Claim:
A rotary die cut stacking system for use with a rotary die cutter having a rotary die configured to output die-cut sheets of material, the rotary die cut stacking system comprising: a stacker including a conveyor for transporting die-cut sheets to a stacking location; and a layboy for carrying the die-cut sheets of material in a first direction from the rotary die cutter to the stacker, wherein, the layboy comprises a first plurality of upper arms and a second plurality of lower arms defining a nip region therebetween for receiving the die-cut sheets, at least some of the first plurality of upper arms and at least some of the second plurality of lower arms being moveable transversely to said first direction, the layboy including at least one optical beam generator associated with at least one of the first plurality of upper arms or second plurality of lower arms and configured to direct an optical beam against a portion of the rotary die cutter, whereby a position of the at least one of the first plurality of upper arms or second plurality of lower arms relative to the rotary die is determinable based on the location of the optical beam on the portion of the rotary die cutter.