US Patent 7874750 Systems and methods for printing multi-layer documents

A system for printing a multi-layer document includes no less than two continuous feed simplex printing devices that each print on no more than one of a plurality of media webs. An in-line post-processing device merges the media webs into a multi-layer document. The system also may have a controller that controls the printing devices and the post-processing device from a single synchronized dataflow. A method prints a multi-layer document, including the steps of simultaneously printing on no less than two media webs by a plurality of roll fed printers that each print on only one of the media webs; and merging the media webs from the plurality of roll fed printers in an inline post-processing device.