Abstract: An inspecting system for security documents is disclosed, wherein a rotating cylinder provided with transparent sectors is apt to transport the document past an image acquiring device, and in which a transparency inspecting device is placed partially inside and partially outside the cylinder so that the electromagnetic inspecting beam is intercepted by the documents held lying onto the transparent sectors. Further, the inspecting system is provided with shading elements, in the optical pattern, apt to define a cone of shade only in correspondence of sensitive elements of a camera.

Abstract: A method and a security sheet inspection apparatus is described of the type includes at least a main driving cylinder (3), whereto a security sheet to be inspected is made to adhere, as well as an inspection system including at least an illuminator (5), a camera (6) for sheet image acquisition and a processing unit of the 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 the main cylinder (3), to draw each security sheet from the main cylinder, to upturn it and present it again turned face down on the 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.