An automatic photographic paper cutter cuts photographic prints from a strip of photographic paper which bears cut indicia indicating the locations of desired paper cuts. An indicia sensor is positioned in fixed relationship with respect to the paer cutter knife assembly at a distance less than the shortest...http://www.google.com.au/patents/US4221144?utm_source=gb-gplus-sharePatent US4221144 - Paper feed control for automatic photographic paper cutter
