| 摘要 |
<p>A head for an ink jet printer of the ink-on-demand type has an intermediate plate (11) sandwiched between two outer plates (21, 22). On one surface of the intermediate plate there are pressure chanbers (12) with nozzles (13) connected therewith and on the other surface of the intermediate plate there are pressure chambers (16) with nozzles (17) connected therewith. The nozzles (13) are offset from the nozzles (17) by 1/2 pitch. Piezo-electric elements (23,24) on the outer plates, when actuated during a printing operation cause ink to be ejected from respective pressure chambers through the nozzles.</p> |
