Patent ID: 7404556

Claim:
A rotary die cut stacker for stacking sheets, comprising: a layboy section for receiving sheets from a rotary die cut machine and for aligning the sheets; a base; a first frame member pivotably mounted to the base; a conveyor, pivotably mounted to the first frame member, for receiving the sheets at an intake end, transporting the sheets, and discharging the sheets from a discharge end, the intake and discharge ends being non-rotatively fixed with respect to each other, the conveyor forming an acute angle θ a with respect to horizontal, wherein the conveyor comprises a plurality of belts, each of the plurality of belts extending from the intake end to the discharge end such that a space is formed between each of the plurality of belts; and a plurality of pivotable slats located between the intake and discharge ends of the conveyor for adjusting the angle of discharge of discharged sheets, the plurality of pivotable slats pivoting about a horizontal axis to form an acute angle θ b with respect to the top of the conveyer, wherein the angles θ a and θ b are inversely proportional so that as the angle θ a is increased, the angle θ b is decreased, wherein each of the plurality of pivotable slats includes a first lateral end and a second lateral end such that the first lateral end is a further distance from the intake end of the conveyor than is the second lateral end and such that the first lateral end of each slat is closer to the intake end of the conveyor than the discharge end of the conveyor is to the intake end of the conveyor and further wherein the plurality of pivotable slats is configured in an alternative manner with the plurality of belts such that each of the pivotable slats is respectively located in a space between each of the plurality of belts.