Patent ID: 9676194
Date: 2017-06-13
CPC Classifications: B41J

Claim:
1. An inkjet printing method of printing an image by controlling printing heads with a controller to discharge ink to a print medium to be transported, the printing heads having a plurality of inkjet nozzles for discharging the ink being disposed in parallel in a width direction intersecting a transportation direction of the print medium, the inkjet printing method comprising: a line flushing step of performing line flushing to the print medium to be transported in which all of the inkjet nozzles associated with printing of the image discharge the ink individually, wherein the line flushing step comprises: an ink discharge step of discharging the ink to the print medium to be transported at least one time with any one of two or more groups into which the inkjet nozzles are organized; a group switching step of switching the one group to the other group while the ink discharge step is performed when the ink is discharged a pre-set number of times to the print medium to be transported; an at least one round taking step of taking at least one round of discharging the ink in the ink discharge step and discharging the ink from the groups in the group switching step; and further comprising: a mark printing step of printing a page information mark onto the print medium to be transported along with the line flushing, the page information mark representing page information on the print medium, wherein the page information mark is printed such that an overlap region is present in which a printable region of the page information mark with pre-set color ink overlaps a line flushing region with ink other than the pre-set color ink.