Sturdy drop generator
AssigneeMarkem-Image Holding
InventorsBruno Barbet, Pierre De Saint Romain
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Abstract
A device for forming and ejecting drops of an ink jet of a CIJ printing machine, this device including: a cavity for containing an ink and including an end provided with a nozzle (10) for ejecting ink drops, actuator means (21, 22, 32, 41, 42), in contact with the cavity, in which device the jet velocity modulation, from the nozzle (10), has a value ΔVj(ft) at the operating frequency of the cavity and the actuator, and this jet velocity modulation, at the temperature of 15° C. and at the temperature of 35° C., does not vary, in a frequency range of ±5 kHz about the operating frequency ft, outside the range of between 0.25 ΔVj(ft) and 4 ΔVj(ft).
Claims14
A device for forming and ejecting drops of an ink jet of a CIJ printing machine, this device including:
- a) a cavity for containing an ink and including an end provided with a nozzle for ejecting ink drops,
- b) an actuator, in contact with the cavity,
- in which device the jet velocity modulation, from the nozzle, has a value ΔVj(ft) at the operating frequency of the cavity and the actuator, and this jet velocity modulation, at the temperature of 15° C. and at the temperature of 35° C., does not vary, in a frequency range of +/−5 kHz about the operating frequency ft, outside the range of between 0.25ΔVj(ft) and 4ΔVj(ft).
Dependencies are inferred from the claim text.