An electrophotographic sheet-fed front/back printing machine is disclosed which not only allows duplex printing but also can be installed in a reduced space.
In the proposed electrophotographic sheet-fed front/back printing machine, sheets of paper fed from a sheet supply (10) is fed out by a sheet transport conveyer (20) onto an impression cylinder (31) of an electrophotographic printing section (30) in which they are printed each on its one side. A sheet printed on its one side is turned over from front to back by a sheet turnover transport unit (60). The sheet printed on the one side and turned over is allowed to fall and supplied onto the sheet transport conveyer (20). The sheet printed on the one side and tuned over is fed again onto the impression cylinder (31) and printed on the remaining other side. Sheets printed on their both sides are transported by a printed-sheet transport unit (40) to a print output receptacle (50) in which they are received.