HP Indigo press 3050 User Manual page 22

The paper transport system moves the printed sheet towards the exit rotors and feeds in a
new sheet. For duplex jobs, the perfector moves the sheet into the perfector tray and turns
the sheet over for the second-side printing.
Figure 2-10. Paper exit system
ENWW
Rotors Perfector Impression
drum
Duplex
conveyor
Print cycle 21