| 摘要 |
PURPOSE:To easily obtain a multi-orifice ink jet head simple in construction and small in size by a method wherein an ink drip is jetted out by applying a magnetic field to a permanent magnet mounted on an expansion film. CONSTITUTION:When cores 5, 6 have polarities N, S, a restitution force is generated between the cores and a permanent magnet 8 disposed upwards thereof. The permanent magnet 8 is momentarily moved toward an ink jet port 10 while deflecting an expansion film 7. In this manner, a pressure is applied to an ink in an ink chamber 11 to jet out an ink drip 12 from the ink jet port 10 disposed upward of the ink chamber 11. Next, an electric conduction to print patterns 3, 4 is interrupted, whereby the expansion film 7 is returned to the former state by its elastic restoring force as well as a pressure constantly applied in the ink chamber 11. Therefore, the ink drip is jetted out of the ink jet port 10 corresponding to the permanent magnet 8 subjected to a magnetic field, whereby a predetermined output, such as characters and graphics, can be formed. |
