Arrangement to supply a print head unit having at least one print head with ink in an ink printing apparatus

摘要

In an arrangement to supply ink to a print head unit having a print head, an input, and an output, a back-pressure tank having ink is provided and connected with the input of the print head unit. A degassing unit for ink and having an input and an output is also provided. A first selector valve is connected to the degassing unit input, the first selector valve in a first position establishing a connection of the degassing unit with the output of the print head unit. A second selector valve is connected to the degassing unit output, the second selector valve in a first position establishing a connection of the degassing unit with the back-pressure tank.

主权项

1. An arrangement to supply ink to a print head unit having a print head, said print head unit having an input and an output, in an ink printing apparatus, comprising:
a back-pressure tank having ink and that is connected with said input of the print head unit via a supply line; a degassing unit for ink and having an input and an output; a first selector valve connected to said degassing unit input, said first selector valve when switched in a first position establishing a connection of the degassing unit with the output of the print head unit; a second selector valve connected to said degassing unit output, said second selector valve in a first position establishing a connection of the degassing unit with the back-pressure tank; the degassing unit having a pump, a filter, and a degassing member for ink; the print head unit having a plurality of said print heads and a distributor to supply the individual print heads with ink, and wherein the first selector valve is connected with an output of the distributor as said print head unit output; and the first selector valve when switched into a second position with the second selector valve switched into the first position filling the supply arrangement with ink.