Patent ID: 8668196

Claim:
A stiffening device for the stacking of sheets in a printing press, said device comprising: at least two laterally distanced sheet transport roll pairs for transporting a sheet in a transport plane; a stacking tray to hold the sheets conveyed out of the printing press; and a sheet contacting unit which is arranged in a direction of transport behind the sheet transport roll pairs such that it deflects at least a partial region of the sheet out of the transport plane at least in a first direction, wherein the sheet undergoes a deformation transversely to the direction of transport and wherein the at least two sheet transport roll pairs and the sheet contacting unit during projection in the transport plane are arranged in a triangular arrangement, and wherein at least two further roll pairs are arranged in the direction of transport of the sheet behind the sheet contacting unit, wherein axes of the further roll pairs are arranged at an angle to the transport plane transversely to the direction of transport.