Device for depositing printed sheets on a sheet pile

Device for depositing printed sheets on a sheet pile, comprising at least one pair of mechanical grippers for seizing the printed sheets at a respective leading edge thereof, the gripper pair being movable over the sheet pile and being controllable for releasing the printed sheets at a given instant of time, an air-blowing device for applying varying pressure to defined regions over a depositing surface of the respective printed sheets for decelerating the sheets before contact with a mechanical stop, a suction device supporting said air-blowing device disposed at the side of said sheet pile, suction control means for controlling said suction device, a control device for controlling the air-blowing device having at least one input and an output, said control device being connected via said output thereof to the air-blowing device, an input device for receiving sheet-specific and process-specific data being connected to said control device via said input thereof, a mass distribution measuring device for measuring said sheet-specific and process-specific data connected to said input device, said sheet-specific and process-specific data including data regarding two-dimensional mass distribution of the respective printed sheet, the air-blowing device being controllable by said control device so as to produce a pressure distribution on the depositing surface of the respective printed sheet which is correlated with said mass distribution of the respective printed sheet;

• wherein said air-blowing device includes means for varying air quantity and acting direction of blowing air depending upon location and velocity of the respective sheets for an elemental area of the depositing surface of the printed sheet, said depositing surface being divided in a matrix-like manner.