Simultaneous duplex digital printer

1. A duplex printer comprising:

a pair of print engines, each print engine comprising at least one printhead and one transfer roller for receiving ink ejected from the at least one printhead;

a pair of print media trays provided upstream and downstream of the pair of print engines, each print media tray comprising a movable platen for supporting a stack of print media and a motorized mechanism for moving the platen; and

a print media feed arrangement for feeding print media from one of the pair of print media trays to the other of the pair of print media trays along a print media feed path, wherein

the transfer rollers of the pair of print engines are provided opposite each other with respect to the print media feed path.

2. A duplex printer as claimed in claim 1 , wherein the print media feed arrangement includes a first motor assembly arranged upstream of the print engines to feed print media along the print media path toward the print engines, and a second motor assembly arranged downstream of the print engines to feed print media along the print media path away from the print engines.

3. A duplex printer as claimed in claim 1 , wherein at least one of the print engines is pivotally mounted relative to a body of the duplex printer.

4. A duplex printer as claimed in claim 1 , wherein each transfer roller engages a respective side of the print media fed along the print media feed path to transfer ink ejected thereon from the at least one printhead onto the print media.

5. A duplex printer as claimed in claim 4 , wherein the at least one printhead and the transfer roller are movable relative to each other to place the at least one printhead in contact with the transfer roller.

6. A duplex printer as claimed in claim 1 , wherein each print engine includes a cleaning station for removing ink on the transfer roller.

7. A duplex printer as claimed in claim 6 , wherein the cleaning station includes a resilient wiper and an absorbent sponge.