Durst Phototechnik Digital Technology Gmbh

Verner Delueg

An ink supply system includes a print head assembly and a print head with one or more nozzles for a color. The print head is connected with the nozzles via a first connection line. A supply tank is connected with an intermediate tank via a filler line under an interconnection of a feed unit and a filter assembly. The pressure difference of the ink flow from a return tank to the supply tank is controlled by the print head. A method cleans the ink supply system, and a method cleans the print head.

Ink supply system and process for cleaning this type of ink supply system

The invention relates to an ink supply system () for an inkjet printer () as well as a method of operating the ink supply system and an inkjet printer. The inkjet printer comprises a print head arrangement () incorporating several print heads () with one or more nozzles () for at least one color. The print heads () are connected via connecting lines () to a supply tank () connected via a filling line to an intermediate tank () with a conveyor means () and a filter arrangement () connected in between, and connected separately in each case via second connecting lines () to a common return tank (). Means () are provided by means of which a pressure difference can be maintained in the supply tank () and/or in the return tank () as and when necessary to control a flow of ink from the supply tank () via the flow passages () of the print heads () connected in parallel to the return tank (). The return tank () is directly connected to the supply tank () via a return line (), optionally with a conveyor means () connected in between.

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Brixen, Italy

Verner Delueg