Paper Exit

During simplex printing, each sheet of paper passes below the paper path junction gate [A] and then feeds between the exit/reverse roller [B] and paper exit roller [C].

Duplex

This machine performs duplex printing using a duplex switchback delivery system. After the 1st side of the sheet is printed it is fed partially out of the machine and then reverse fed down into the machine by the paper/exit reverse roller for printing on the 2nd side.

During duplex printing, the leading edge of each sheet already printed on one side enters the paper exit path, triggers the paper junction gate sensor. This closes the junction gate [A] while the reverse rotation of the exit/reverse roller [B] feeds the paper to the duplex reverse roller [C].

When the trailing edge of the sheet passes the paper exit/reverse sensor (S1) [D], before the paper can feed completely out the machine paper exit the junction gate opens (returns to its original position), and then the exit/reverse roller switches to forward rotation, feeding the paper down past the junction gate into the duplex paper path. Next, the paper feeds into the machine again for printing of the other side of the paper.

Paper Exit Full Detection

If the height of the paper stacked on the output tray exceeds a certain limit, the paper exit full sensor (S10) detects it based on the position of the paper overflow sensor feeler, and then the machine stops printing so the operator can remove the paper from the exit tray.

Exit/ Duplex Drive

The components that drive the rollers in the exit/duplex paper path are described below.

The fusing/exit reverse roller [A] is driven by the feed/fusing motor (M4) [B].

The duplex relay roller [C] and duplex exit roller [D] are engaged by the duplex clutch (CL1) [E] and driven by the feed/fusing motor (M4) [B].

The paper exit/reverse roller [F] is controlled independently by the exit/reverse motor (M1) [G] which controls the reverse and forward rotation of the reverse/exit roller near the paper exit to change the direction of paper feed during duplexing.

The position of the paper path junction gate [H] is controlled by the exit junction gate solenoid (SOL1) [I].