Patent ID: 7874632
Filing Date: 2011-01-25
Classification: B41J

Abstract:
1. An ink jet printer comprising: a shear-mode ink jet head having a plurality of nozzles split into a plurality of groups for simultaneously printing per group, each of said groups including a target nozzle, a non-jet nozzle located at one side of the target nozzle, and a jet nozzle located at a side opposite to the non-jet nozzle; and a density correction control unit connected to the shear-mode ink jet head for controlling a density of an end of an image to be printed, said density correction control unit implementing fixed correction by reducing a number of droplets ejected from the target nozzle relative to that ejected from the jet nozzle when a drop amount jetted from the jet nozzle is designed to be same as that of the target nozzle so that a phenomenon wherein the density of the end of the image increases can be corrected by correcting an influence acting among the jet nozzle, the non-jet nozzle and the target nozzle.