| 摘要 |
PURPOSE:To steadily keep a constant pressure wave, by applying the positive or negative pulse having a specific width with respect to the primary resonance wavelength of a common ink chamber to a pressure generating means at a cycle 1/integer-times of the primary resonance. CONSTITUTION:By a drive system pressurizing at first and attenuating after the elapse of a definite time, a positive pulse having a width 1/4 the primary resonance wavelength of a common ink chamber 4 is continuously applied at a cycle 1/integer-times the primary resonance. In this case, a pressure wave A having the same mode as the primary resonance frequency of the common ink chamber 4 is generated in the common ink chamber 4. As mentioned above, since the applied pulse becomes the mode coinciding with the pressure response of a head itself, pressure amplitude can be made max. By a drive system attenuating at first and pressurizing after the elapse of a definite time, a negative pulse having a width 1/2 the primary resonance wavelength of the common chamber 4 is continuously applied at a cycle 1/integer-times the primary resonance. B is the pressure wave generated in the common ink chamber 4. In this case, pressure amplitude can also be made the max. |
