Device for feeding sheets

A sheet-processing machine comprising;

• at least one processing mechanism;
• a feeder head for cyclically separating the sheets from a pile, the feeder head comprising transporting suckers for transporting the sheets;
• a belt table comprising at least one revolving transport belt, which is guided over at least two feed rollers wherein the transporting suckers are configured to transport the sheets to the belt table;
• a first drive assigned to at least one feed roller of the at least two feed rollers;
• a sheet flap, which sheet flap is connected to a pivotably mounted shaft, the sheet flap being provided between the transporting suckers and the at least one transport belt;
• a second drive assigned to the pivotably mounted shaft for pivoting the pivotable mounted shaft,
• a sheet arrival sensor, which sheet arrival sensor is arranged between the belt table and the at least one processing mechanism and which sheet arrival sensor generates first signals representing the arrival of the sheets for a sequence of sheets;
• a clock generator, which clock generator generates second signals representing an angular position of the at least one processing mechanism;
• and
• a controller, which controller controls the first drive as a function of the second signals, and which controls the second drive as a function of the first and second signals, wherein clock-based speed profiles, describing a duration of time for handling one sheet are stored in the controller for controlling the first and second drives.