Patent ID: 7347518

Claim:
An ink jet recording head for jetting ink droplets to a recording medium and forming a dot image on said recording medium, said ink jet recording head comprising: ink jetting orifices from which ink droplets are jetted; ink paths connected to said ink jet orifices, said ink paths being filled with ink and equipped with energy applying members for applying energy to the ink in said ink paths on demand so that ink droplets are jetted from said ink jetting orifices, wherein a cross sectional area of each of said ink jetting orifices is within a range from 200 μm 2 to 500 μm 2 , and wherein said energy applying members apply the energy to the ink so that the ink droplets, each of which has a flying velocity equal to or greater than 5.2 m/second, are jetted at a frequency which is within a range from 10 kHz to 40 kHz.