| 摘要 |
<p>Undesirable deflection of partitioning walls (8(2), 8(3)) between pressure chambers (5(2)-5(4)) is prevented during ink discharge operations even when the partitioning walls are made very thin to achieve a high density inkjet head. The diaphragms (51(3)) of the driven nozzles of the inkjet head as well as the diaphragms (51(2), 51(4)) of the non-driven nozzles are all driven to contact the corresponding segment electrodes (10(2)-10(4)), and this diaphragm to segment electrode contact state is maintained in the non-driven nozzles while the diaphragms of the driven nozzles are released from segment electrodes to discharge ink. After printing is completed the diaphragms of the non-driven nozzles are slowly released from the corresponding segment electrodes at a speed that will not cause undesirable ink discharge. By thus maintaining low compliance in the pressure chambers of the non-driven nozzles, deformation of the partitioning walls between driven and non-driven nozzles due to change in the pressure can be reliably prevented. A drop in ink discharge performance due to such partitioning wall deformation can be reliably prevented, and printing with high resolution, precise print quality can be easily achieved. <IMAGE></p> |
