Apparatus and processes for receiving sheets from a sheet stacker, separating them into bundles, and removing the bundles from the discharge area of the sheet stacking apparatus. The apparatus includes a frame, a rotatable receiving means mounted on the frame, means for separating the bundles of sheets being received, and means for rotating the rotatable receiving means. The receiving means may include a plurality of sheet receiving chambers, each chamber having an elevator which may be lowered in the respective chamber. The apparatus also has means for raising each elevator. The separating means accumulates the sheets being received from the sheet stacker while the receiving means is being rotated.