A device for stacking papers having a disk with a top and bottom surface, a means for rotating the disk, a pair of symmetrically opposing movable walls having opposing longitudinal flat wall sections that are kept in a parallel space apart relationship. The opposing fiat wall sections and the top surface of the disk defining a first space adapted to receive the papers, and the interior of said symmetrically opposing movable walls and the top surface of the disk defining a second space adapted to contain the assembly for turning the opposing movable walls. The movement of the opposing movable walls discharging the papers that have been deposited in the first space of the device. The device also includes tensioners that keep the symmetrically opposing movable walls taut and are positioned so that the tensioners do not alter the parallel spaced apart relationship of the opposing longitudinal fiat wall sections. In addition, the symmetrically opposing movable walls are mounted to the top surface of the disk on slots so that they can be adjusted to collect, and discharge, papers of greater or less length.