Finisher with single roller for frictionally moving each sheet

This invention relates to a finisher for stacking sheets of paper or similar material moving in a predetermined direction in a specific alignment at a predetermined location and, more particularly, to a finisher for stacking sheets in which motion of each sheet is directed to two substantially perpendicular reference barriers defining a corner with a first edge of each sheet engaging the closer of the two reference barriers before a second edge of the sheet engages the other reference barrier. A single aligning roller is disposed at angle to each of two reference barriers to which a printed sheet is to be advanced so as to be aligned at a specific location for stapling. The aligning roller exerts a greater force towards the reference barrier further from the adjacent edge of the printed sheet to be aligned. The aligning roller is preferably at 66° to the reference barrier further from the adjacent edge of the printed sheet to be aligned.