Patent ID: 7219889

Claim:
A sheet-processing machine, comprising: a blast or blown-air supply system; and a pneumatic sheet-guiding device connected to said blast or blown-air supply system; said sheet-guiding device having flow ducts for aligning sheet-carrying air flows, said flow ducts having sidewalls, said flow ducts having guide vanes and throttles or restrictors disposed therein, said guide vanes being oriented orthogonally or at an angle with respect to said side walls; said sheet-guiding device having a sheet-guiding surface; said sheet-guiding surface having air passage openings formed therein for sheets being dragged over said air passage openings in a sheet travel direction and for expelling said sheet-carrying air flows during operation; said air passage openings in said sheet-guiding surface forming opening cross-sections of said flow ducts, said opening cross-sections being slots having a length and a width, said length being multiple times greater than said width.