INK JET PRINTER AND METHOD FOR DRIVING THE SAME

摘要

Either a first electric pulse having such an amplitude that the nozzle of an ink jet printer ejects an ink droplet or a second electric pulse having an amplitude which is smaller than that of the first pulse and causes ink in the nozzle to flow is impressed upon a pressure generating means which applies a pressure to the ink in the nozzle. When the second electric pulse is impressed upon the pressure generating means, no ink droplet is ejected from the nozzle. However, when the second electric pulse is impressed, the ink near the nozzle is made to flow and the most viscous ink at the front end of the nozzle is mixed with less viscous ink in the interior of the nozzle, lowering the viscosity of the ink near the nozzle is lowered as a whole, namely, allowing an ink droplet to be easily ejected.