A method of correcting a position of sheet material on conveying elements,
the sheet material extending from a surface of a first sheet-conveying
element to a surface of a second sheet-conveying element following
downline from the first sheet-conveying element, as viewed in a conveying
direction of the sheet material, which comprises detecting an actual
position of a leading edge of the sheet material by at least one sensor
element disposed on the first sheet-conveying element; by a control unit,
making a comparison between a nominal and the actual position of the sheet
material; and, if the actual position deviates from the nominal position
of the sheet material, causing an actuator to fix the sheet material to
the following second sheet-conveying element so as to perform a correction
of the position deviation; a reversing or turning device in combination
with the correction device; a printing unit having the correction device;
and a multicolor printing machine in combination with the correction
device.
