Patent ID: 7869623
Filing Date: 2011-01-11
Classification: G07D

Abstract:
1. Inspection machine for printed matter in the form of printed sheets, comprising: a sheet feeder, a first sheet inspection unit with a first inspection cylinder for transporting a printed sheet during inspection, a first illumination means and a first camera connected to an analysing device for taking an image of the printed sheet while it is transported on the first inspection cylinder, a second sheet inspection unit with a second inspection cylinder for transporting a printed sheet during inspection, a second illumination means and a second camera connected to the analysing device for taking an image of the printed sheet while it is transported on the second inspection cylinder, a third sheet inspection unit with a third inspection cylinder for transporting a printed sheet during inspection, a third illumination means and a third camera connected to an analysing device for taking an image of the printed sheet while it is transported on the third inspection cylinder, an input transfer cylinder to successively bring the printed sheets to the first inspection unit, and an output transfer cylinder to take away the printed sheets from the third inspection unit, wherein the input transfer cylinder, the first, second and third inspection cylinders and the output transfer cylinder are disposed one after the other in direct contact so that a printed sheet is transferred directly and successively from the input transfer cylinder to the first inspection cylinder, to the second inspection cylinder, to the third inspection cylinder, and to the output transfer cylinder, and wherein the first, second and third inspection units and the input and output transfer cylinders are arranged in such a manner that the printed sheet is transferred directly from one transfer or inspection cylinder to another and that the inspected printed sheet is taken away from the first, second or third inspection cylinder only once the inspection of the sheet is completed by the first, second or third inspection unit.