Heidelberger Druckmaschinen Ag

Daniel Prieto-Dörfel

Rainer Hofmann

Bernd Heller

A method of operating equipment for coating printing materials in a printing press includes providing equipment made up of at least one metering system and a circulating line system associated with the metering system for at least one liquid medium received in at least one container. The circulating line system also has a pump subsystem with at least one feed pump for feeding the liquid medium from the container to the metering system, and at least one return pump for returning the liquid medium from the metering system into the container. Furthermore, a feed line is disposed between the metering system and the feed pump. In order to preferably completely empty at least the feed line, the steps of shutting off a medium connection between the feed pump and the container and connecting a suction side of the feed pump to a space having a gaseous medium, for sucking in the gaseous medium by the feed pump and, as viewed in pumping direction of the feed pump, for pumping the gaseous medium into the feed line, are carried out. Equipment to be operated according the method is also provided.

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Munich, Germany

Daniel Prieto-Dörfel