Suction system for turning drums in printers has suction pieces, central holes, suction air chamber, suction air generator and pipes and valves.

摘要

The suction system is formed alternately of vacuum-suction-pieces (7) and holder-suction pieces (7.1) over the width of the turning drum. The suction-pieces each have central holes (9,9.1), a smooth surface, and a profiled suction chamber into which the holes open. The holes are connected to a suction air generator (19) by means of a suction air pipe (20,20.1) and valves (17,17.1).