Abstract:
A method and a security sheet inspection apparatus is described of the type comprising at least a main driving cylinder (3), whereto a security sheet to be inspected is made to adhere, as well as an inspection system comprising at least an illuminator (5), a camera (6) for sheet image acquisition and a processing unit of said image to check sheet print quality, wherein there is further provided a sheet-feeder (2) feeding sheets from a tray (1) above the main cylinder (3) and a pair of secondary cylinders (8’, 8’’), mutually adjacent and adjacent to said main cylinder (3), to draw each security sheet from the main cylinder, to upturn it and present it again turned face down on said main cylinder (3), the three cylinders being apt to rotate and being controllable independently from one another, the cylinders and the inspection system being housed in a self-enclosed unit.