Apparatus is disclosed for positioning a continuous paper form having uniformly positioned seams and emanating from a high speed printing device, such as from a high-speed computer printer, in a bin or stacker. Air jets positioned on the stacker are utilized in a mode whereby air bursts from the jets impinge at discrete locations on a top surface of the form as it emanates from the printer. The air bursts cause the continuous paper form to fold naturally in a stacker bin at the paper seams.