Feeder of a sheet treating or processing machine, and method for detecting and/or correcting sheets having deviating positions and/or dimensions in a feeder of a sheet treating or processing machine

A feeder of a sheet treating or processing machine, in which a pile of sheets to be processed can be received, comprising at least two handling tools, which are spaced apart from one another transversely to a transport direction of the sheets and by which an uppermost sheet can be transported away from the pile in the transport direction into a transport path adjoining downstream, wherein:

• a sensor system is provided at least one of:
• on a front side of the pile pointing in the transport direction of the sheets, and comprises at least one sensor, by which a distance with respect to at least two locations, which are spaced apart from one another horizontally and transversely to the transport direction, on the front side of the pile can be ascertained, or
• on a rear side of the pile, which is directed counter to the transport direction, and comprises at least one sensor by which a distance with respect to at least two locations, which are spaced apart from one another horizontally and transversely to the transport direction, on the rear side of the pile can be ascertained.