Abstract: A sheet block inverter is described in which successive blocks of sheets received along an infeed plane are successively inverted prior to being received on a discharge conveyor. A sheet block receiving magazine receives a sheet block along the infeed plane. A magazine pivot driver then pivots the sheet block through an angle about a second axis of less than 180.degree., leaving the block nearly inverted and upwardly inclined. The magazine is mounted to a magazine inverter yoke, which in turn is pivotably mounted to a discharge conveyor. The inverter yoke and magazine are then pivoted by an inverter yoke pivot driver about a first axis to a discharge station where the discharge conveyor receives the block. The discharge conveyor is mounted for elevational adjustment about an axis that is coaxial with the first axis.