| 摘要 |
The invention relates to a device for forming and ejecting drops of an inkjet of a CIJ printing machine, said device comprising: a) a cavity for containing an ink and comprising an end provided with a nozzle (10) for ejecting drops of ink, and b) actuator means (21, 22, 32, 41, 42) in contact with the cavity. The invention relates to a device wherein the jet velocity modulation from the nozzle (10) has a value of ΔVj(ft) at the operating frequency, and does not vary, at a temperature equal to 15 °C and to 35 °C, in a frequency range of +5 kHz around the operating frequency ft, outside the range between 0.25ΔVj(ft) and 4 ΔVj(ft). In order to achieve this, the acoustic impedance of the cavity is suitable for limiting the influence thereof on the jet velocity modulation. |
