High speed printed sheet stacking and registration system

In a sheet stacking and registration system with a sheet stacking area for sequentially stacking the flimsy printed sheets output of a reproduction apparatus being sequentially fed to said sheet stacking area, with an edge registration system defining a sheet lead edge stacking registration position;

• the improvement in high speed sheet stacking and registration with improved sheet control, comprising:
• a vacuum belt sheet transport for vacuum acquiring a limited lead edge area of said sheets being fed to said stacking area and for transporting said acquired sheets over said stacking area, above sheets previously stacked therein, towards said sheet lead edge stacking registration position of said edge registration system;
• a sheet peeling system for peeling the lead edges of said sheets off of said vacuum sheet transport adjacent to said sheet lead edge stacking registration position and for guiding said peeled sheet lead edge downwardly and towards said registration position;
• said vacuum belt sheet transport has a belt vacuum aperture pattern for reducing said vacuum acquisition of said sheets as said sheets are being peeled off by said sheet peeling system;
• and
• a normal force system operatively associated with said sheet peeling system for pressing down the lead edges of said peeled off sheets against said previously stacked sheets in said sheet stacking area as the lead edges of said sheets reach said sheet lead edge stacking registration position.