Patent ID: 6644764
Filing Date: 2003-11-11
Classification: G06K

Abstract:
A document printing and verification system, comprising:a document printing apparatus for printing multi-page documents including text on print media; an inkjet printer apparatus comprising an inkjet printhead adapted to emit ink droplets of an invisible ink which is not visible to the unaided eye when viewed with natural light illumination for printing on each page of the multi-page document an invisible identification pattern which is not visible to the unaided eye when viewed with natural light; a scanner apparatus positioned for producing an image of said identification image for verification use, said scanner apparatus including a light source for illuminating an imaging zone with light including nonvisible energy components and a camera sensitive to nonvisible light from the print media to form an image of said nonvisible identification image; and a system controller for controlling the document printing apparatus and the inkjet printing apparatus and responsive to image signals from the scanner apparatus to verify the presence of each page of the multi-page document imprinted with said identification pattern.