Duplex Transport

When the duplex/invert sensor [A] detects the trailing edge of the paper:

• The invert JG solenoid [B] goes on.
• The invert junction gate [C] opens.
• The paper brushes past transfer junction gate [D].
• The duplex invert motor [E] feeds the paper down.

When the duplex invert sensor [A] detects the trailing edge of the paper, the duplex inverter motor [B] reverses and feeds the paper up past the open junction gate above. This is the "switchback" operation.

The duplex transport motor 1 [A] and duplex transport motor 2 [B] drive the seven duplex transport rollers that take the sheet that has just entered the duplex unit and feed it to the relay rollers. The sheet passes up into the main paper transport path of the machine for printing on the second side. The relay rollers are driven by the bank exit motor [C].