Konica-Minolta Holdings, Inc.

Shozo Kikukawa

Kazuo Asano

Chise Nishiwaki

A method of driving a droplet jetting head comprising nozzle orifices to jet droplets, pressure generating chambers each of which can store liquid and communicate with one of the orifices, and pressurizing devices to change the pressures of the pressure generating chambers, comprising the steps of increasing the pressure in the pressure generating chamber by the pressurizing device and protruding liquid in the pressure generating chamber from the nozzle orifice as a droplet, and separating the liquid which protrudes from the nozzle orifice when &#x3b1;/&#x3b2; is equal to or less than 1/3 where &#x3b1;(&#x3bc;m) is the diameter (in micrometers) of an liquid pillar (protruded from the nozzle orifice) at the front end of the nozzle orifice and &#x3b2;(&#x3bc;m) is the maximum diameter (in micrometers) of the liquid pillar.

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Akiruno, Japan

Shozo Kikukawa