Abstract: In a document transport 10 for transporting an original document sheet 14 over the imaging station 18 of a copier 12 there is disclosed a single integrally movable roller unit 11 solely engaging and driving a document sheet over the platen from an initial position 24 upstream of the imaging station to a document ejection position 32 downstream thereof with driving means 35 both rotating and translating the roller unit relative to the platen to translate the roller unit 11 and a document sheet held and transported thereunder over and through the imaging station without imaging the roller unit or rubbing the platen glass in the imaging area. The disclosed roller unit 11 reciprocates a distance 33 from and back to the initial position 24 with pinion gears 28 on the roller shaft 30 engaging racks 26 to control the combined rotational and translational movement of the transport wheels 25 in the transporting movement direction. Clutch release of the rollers may be provided in the return movement.