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 (01) of a sheet treating or processing machine, in which a pile (09) of sheets (06) to be processed can be received, comprising at least two first handling tools (12), which are spaced apart from one another transversely to a transport direction (T) of the sheets (06) and by which an uppermost sheet (06) of a pile (09) received in the feeder (01) can be lifted off the pile (09), and/or comprising at least two second handling tools (13), which are spaced apart from one another transversely to a transport direction (T) of the sheets (06) and by which an uppermost sheet (06) lifted off the pile (09) can be transported away from the pile (09) in the transport direction (T) into a transport path adjoining downstream, characterized in that a sensor system (S5, S6, S7, S8) is provided, which on the front side of the pile (09) pointing in the transport direction (T) of the sheets (06) to be fed comprises one or more sensors (S5, S6), by which a piece of information about a distance with respect to at least two locations, which are spaced apart from one another transversely to the transport direction (T), on the front side of the pile (09) can be ascertained, and/or that the sensor system (S5, S6, S7, S8) on the rear side of the pile (09), which is directed counter to the transport direction (T), comprises one or more sensors (S5, S6) by which a piece of information about a distance with respect to at least two locations, which are spaced apart from one another transversely to the transport direction (T), on the rear side of the pile (09) can be ascertained.