A printer device has first and second print media paths to carry paper from a sheet pickup mechanism to the printer device and then to a sheet exit opening. A third print media path carries the sheet from the sheet exit opening back to the printer device for duplex printing. A sheet diverter has first...http://www.google.fr/patents/US6909872?utm_source=gb-gplus-shareBrevet US6909872 - Multipath printers
