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US 2004/0201644 A1Published application
Inkjet printhead
AssigneeOce-Technologies B.V.
InventorsMarcus J. Van Den Berg, Hans Reinten
Life of this patent
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Abstract
An inkjet printhead having a plurality of pressure chambers each of which is fluidly connected on the one hand, via an ink supply path, to a common ink reservoir and on the other hand to a nozzle, wherein an actuator is provided for each pressure chamber for pressurizing the ink contained therein so as to eject an ink droplet through the nozzle in accordance with a print signal, and an acoustic wave attenuator is arranged to control the acoustic reflection and transmission properties of the ink supply path.
Claims4
An Inkjet printhead which comprises:
- a common ink reservoir;
- a plurality of pressure chambers fluidly connected at one end via an ink supply path to the common ink reservoir and at the other end to associated nozzles,
- an actuator operatively associated with each pressure chamber for pressurizing the ink contained therein so as to eject ink droplets through the nozzle in accordance with a print signal, the pressure chambers forming at least one array of parallel-ink channels, said ink supply path for the nozzle channels having an inlet passage which is connected to the ink reservoir and extends transversely of the ink channels for connecting the ink reservoir with the nozzles, and
- a flexible sheet covering said ink channels, wherein
- the printhead is provided with an acoustic wave attenuator which is arranged to control the acoustic reflection and transmission properties of the ink supply path, said wave attenuation being defined by a position of said flexible sheet which is allowed to flex, relative to the actuators, in response to the pressure fluctuations in the ink supply path, said portion of the sheet forming the wave attenuator being adapted to extend away from the actuators.
2 more elements
Dependencies are inferred from the claim text.