Inspecting printing plates, sheets, films or film mountings for different colour separations in multicolour printing

摘要

The printing plates, films sheets or mountings being inspected are completely and automatically scanned by opto-electronic means. The films etc 2) are fixed in position by a holder. The films, plates etc have a stroboscope lighting system (11) and a flat illumination system. Each printing plate, film etc has at least one camera (10) all of which have a synchroniser and are connected and movably positioned on a biaxial positioning appliance (3,7,8) so that each camera can run each scanning element of the printing plate, film etc. The biaxial positioner has an electronic control, electronic picture processor and user exit for controlling all the components of the system and for issuing, indicating and or further processing the picture data obtained.