An apparatus for simulating a color printing process comprises a scanning unit including a table on which four color separation films formed from a color original are placed side by side, a pair of flying spot scanner tubes, four lens systems for projecting raster images of the scanner tubes onto the...http://www.google.com.au/patents/US4393398?utm_source=gb-gplus-sharePatent US4393398 - Apparatus for simulating color printing process
