| 摘要 |
PURPOSE: To prevent the dripping of a fluid from a jet orifice during a stop time by providing a changeover means for changing over the flow of the fluid from a chamber between first and second fluid flow routes so that the fluid is guided through the first fluid flow route when the taking-out of the fluid in small quantities is required and guided through the second fluid flow route when it is not required. CONSTITUTION: When liquid droplets of a fluid are taken out of a nozzle 18 in small quantities, a drive device 23 is temporarily energized in place of a drive device 22 and the flow of the fluid from a main chamber 9 is changed over to a discharge channel 16 to eject the fluid from the nozzle 18. If a required amt. of the fluid is distributed, by immediately again energizing the drive device 22, the flow is changed over to a channel 17 and the fluid is again circulated to the main chamber 9 or a fluid supply source. By this constitution, printing of good quality can be obtained. |
