Phaser 4400 Laser Printer Service Manual 8-31Duplex Printing MethodsThe Duplex Unit uses a single-sheet batch and a multi-sheet batch mode whenduplexing a print job. Single-sheet batch printing ó involving a single sheet of paper.The first side of the page is printed, then the second side is printed and thepage is sent to the output tray.Single-sheet batch is used by the printer when a complex duplex job isreceived. For example, if the printer received a job that contains complicatedgraphics, the printer will switch to single-sheet batch mode so it can processthe job. Multi-sheet batch printing:1. The printer prints on one side of the first sheet of paper.2. The first sheet is returned to the Duplex Unit and held.3. The printer prints on one side of a second sheet of paper.4. The Duplex Unit returns the first sheet to the printer as the Exit Assemblyreturns the second sheet to the Duplex Unit.5. The printer prints on the second side of the first sheet.6. The printer transports the first sheet to the Output Tray.7. A third sheet is fed and printed on one side.8. The Duplex Unit returns the second sheet to the printer as the third sheet isreturned to the Duplex Unit.9. The printer prints on the second side of the second sheet.10.The printer transports the duplexed printed second sheet to the output tray.This process repeats for additional prints.Drive FlowThe Duplex Motor Assembly generates the mechanical energy needed to run theDuplex Unit.The Drive Flow of the Duplex Unit
