Patent ID: 8915186
Filing Date: 2014-12-23
Classification: B41F,B41P

Abstract:
1. A method of cleaning off an ink in a flexographic printing machine, wherein a flexographic ink is supplied to an ink chamber facing an outer peripheral face of an anilox roll, and the flexographic ink is transferred from the anilox roll to a printing die wound about a printing cylinder, the method comprising: after removing the flexographic ink from the ink chamber, supplying a multiphase fluid to the ink chamber by a multiphase fluid generator, to generate a pressure difference between two ends of the ink chamber in a longitudinal direction of the ink chamber by means of a discharging action of the multiphase fluid generator, the pressure difference generating a one-directional flow of the multiphase fluid in the longitudinal direction of the ink chamber, to clean the ink chamber by means of a cleaning action of the multiphase fluid, the multiphase fluid containing a gas or minute granular solids in two or more liquids or a liquid; wherein first air is supplied into the multiphase fluid by the multiphase fluid generator before the multiphase fluid is supplied to the ink chamber, and second air is supplied into the multiphase fluid discharged from the ink chamber by a pressure difference generating device to generate the pressure difference between the two ends of the ink chamber in the longitudinal direction of the ink chamber.