A suction system is arranged in a sheet guiding cylinder of a printing machine which is switchable from the first form mode to the printing on both sides of the sheet which is turned over by the suction system around its rear edge. The suction system includes an arrangement for automatically controlling...http://www.google.es/patents/US4790244?utm_source=gb-gplus-sharePatente US4790244 - Suction system for sheet guiding cylinders in printing machines
Suction system for sheet guiding cylinders in printing machines
