Patent ID: 8974025
Filing Date: 2015-03-10
Classification: B41J

Abstract:
1. An ink jet recording apparatus comprising: a liquid-ejecting head including a pressure-generating chamber filled with a photocurable ink composition containing a polymerizable functional group-containing compound and water, a nozzle communicating with the pressure-generating chamber and ejecting a droplet of the photocurable ink composition, and a pressure-generating member causing a pressure change in the pressure-generating chamber; and an ejection pulse-generating unit generating an ejection pulse for driving the pressure-generating member, wherein the ejection pulse includes: a first voltage-changing factor expanding the volume of the pressure-generating chamber to pull a meniscus into the nozzle; a second voltage-changing factor contracting the volume of the pressure-generating chamber to push the meniscus from the nozzle after the first voltage-changing factor; a third voltage-changing factor causing a volume-expanding change for expanding the pressure-generating chamber after the second voltage-changing factor; and a fourth voltage-changing factor causing a volume-contracting change for contracting the pressure-generating chamber after the third voltage-changing factor, and the ink droplet is discharged from the nozzle by means of the ejection pulse.