Patent ID: 7874636
Filing Date: 2011-01-25
Classification: B41J

Abstract:
1. Method for cleaning a print head of an ink jet printer comprising at least one ink gun with an ejection nozzle, an ink collection gutter, an ink chamber, a solvent chamber, a vacuum source, wherein each of the chambers and source are hydraulically connected, by means of a device capable of being controlled, to the ink gun, comprising the following sequence of: interruption of a hydraulic connection between the gun and the ink chamber so that the ink gun is no longer supplied with ink, establishment of a hydraulic connection between the gun and the vacuum source, so that the ink in the gun is suctioned toward the vacuum source, establishment of a connection between the solvent chamber and the vacuum source via a hydraulic circuit comprising the ink gun, but not flowing through the nozzle, so that the gun is cleaned without ejection of solvent through the nozzle.