Fluid ejection device
AssigneeHewlett-Packard Development Company, L.P.
InventorsTracy A Lang, Alexander Govyadinov
Life of this patent
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Abstract
A fluid ejection device includes a fluid ejection chamber having a drop ejecting element therein, a first fluid channel to communicate a first fluid with the fluid ejection chamber, a second fluid channel to communicate a second fluid different than the first fluid with the fluid ejection chamber, and a fluid pump communicated with one of the first fluid channel and the second fluid channel. As such, the fluid ejection chamber is to selectively eject drops of the first fluid, the second fluid, and a combination of the first fluid and the second fluid therefrom.
Claims12
A fluid ejection device, comprising:
- a fluid ejection chamber having a drop ejecting element therein;
- a first fluid channel to communicate a first fluid with the fluid ejection chamber;
- a second fluid channel to communicate a second fluid different than the first fluid with the fluid ejection chamber;
- a fluid pump communicated with one of the first fluid channel and the second fluid channel, and
- a mixing zone between the fluid pump and the fluid ejection chamber to form a combination of the first fluid and the second fluid,
- the first channel to direct the first fluid to the mixing zone in a first direction along a first axis, and the second channel to direct the second fluid to the mixing zone in a second direction opposite the first direction along a second axis coaxial with the first axis,
- the fluid ejection chamber to selectively eject drops of the first fluid, the second fluid, and the combination of the first fluid and the second fluid therefrom.
A fluid ejection device, comprising:
- a first fluid opening to supply a first fluid;
- a second fluid opening to supply a second fluid different than the first fluid;
- a fluid nozzle to selectively eject drops of the first fluid, the second fluid, and a mixture of the first fluid and the second fluid;
- a fluid pump between the fluid nozzle and one of the first fluid opening and the second fluid opening to pump a respective one of the first fluid and the second fluid to the fluid nozzle;
- and
- a mixing zone between the fluid pump and the fluid nozzle to mix the first fluid and the second fluid,
- the first fluid and the second fluid to be supplied to the mixing zone in opposite directions along a common axis.
A method of operating a fluid ejection device, comprising:
- communicating a first fluid with a fluid ejection chamber;
- communicating a second fluid different than the first fluid with the fluid ejection chamber;
- and
- selectively ejecting drops of the first fluid, the second fluid, and a combination of the first fluid and the second fluid from the fluid ejection chamber, including pumping one of the first fluid and the second fluid to the fluid ejection chamber with a pump positioned between the fluid ejection chamber and a supply of a respective one of the first fluid and the second fluid and mixing the first fluid and the second fluid in a mixing zone between the fluid pump and the fluid ejection chamber to form the combination of the first fluid and the second fluid, including supplying the first fluid and the second fluid to the mixing zone in opposite directions along a common axis.
Dependencies are inferred from the claim text.