US Patent 7566123 Double-sided printer having opposed print engines

Provided is a double-sided printer having two print engines arranged on opposite sides of a print media path. Each print engine includes an image transfer roller configured to operatively transfer an image onto a sheet of paper fed through the media path. Also included is an ink cartridge having an integrated printhead for printing onto said image transfer roller, as well as a cleaning station configured to clean the image transfer roller after said image is transferred to the paper. Each print engine also includes a solenoid arrangement configured to park an elastomeric seal of the printhead against the transfer roller when the printer is not operational, and to move the printhead from the roller when the printer is operational.