Abstract: An improved system and method for tracking and managing documents in a high throughput document printing line comprising a printing means, a sensor means and a processing means. The printing means prints a desired invisible symbology and visible text on a document fed to it. The clear printing toner is fused with an invisible marker. The invisible symbology is printed on the document using the invisible marker. The sensor means is capable of reading the invisible symbology printed on the document. The sensor means communicates the sensor readings to a processing means. The processing means receives the sensor readings from the sensor means and correlates the sensor readings with data identifying a plurality of projects thereby determining the appropriate project to which the printed document belongs.

Abstract: A merging module connects two printing systems at approximately 90 degrees to one another. The merging module includes a sheet rotator in a plane that is common to the paper paths of both print engines and a buffer. It also includes two bypass paths (one above and one below the rotator) to route the two paper paths around the rotator and enable both print engines to deliver their output to the appropriate finishing device as well as to the buffer.