Abstract: An apparatus which damps movement of sets of sheets being stacked on a support member. The support member moves, at selected intervals, to offset adjacent sets of sheets from one another. A pair of pivotably mounted arms have their free ends engaging the outermost sheet of the sets of sheets stacked on the support member. The arms apply a normal force on the sets of sheets without applying a lateral force thereon. In this way, the sets of sheets are damped without disturbing the integrity of the sets of sheets during offsetting.

Abstract: A copier/printer having a transfer station for transferring images from an imaging member to copy sheets includes the improvement of removing debris from the surfaces of copy sheets facing the imaging member before the copy sheets reach the transfer station. At least a pair of cooperating rolls are positioned to form a nip for driving the copy sheets therebetween toward the transfer station. The cooperating rolls include a drive roll and a dielectric roll with the dielectric roll being electrostatically charged by the drive roll and paper through contact and separation during the intercopy gaps between copy sheets in transit to the transfer station through contact with the copy sheets to electrostatically attract debris from the copy sheets.