Fluid ejection device
AssigneeHewlett-Packard Development Company, L.P.
InventorsAlexander Govyadinov, Paul A. Richards, Chris Bakker
Life of this patent
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Abstract
A fluid ejection device includes a fluid slot, at least one fluid ejection chamber communicated with the fluid slot, a drop ejecting element within the at least one fluid ejection chamber, a fluid circulation channel communicated with the fluid slot and the at least one fluid ejection chamber, and a fluid circulating element communicated with the fluid circulation channel. The fluid circulating element is to provide on-demand circulation of fluid from the fluid slot through the fluid circulation channel and the at least one fluid ejection chamber.
Claims20
A method of operating a fluid ejection device, comprising:
- communicating a fluid circulation channel with a fluid slot and a fluid ejection chamber, the fluid circulation channel having a fluid circulating element communicated therewith, and the fluid ejection chamber having a drop ejecting element therein;
- and
- controlling on-demand circulation of fluid from the fluid slot through the fluid circulation channel and the fluid ejection chamber by operation of the fluid circulating element, wherein the controlling of the on-demand circulation by the operation of the fluid circulating element comprises initiating the on-demand circulation in response to detecting that a decap time limit has been violated, the decap time limit representing an amount of time a nozzle can remain uncapped and exposed to an ambient condition without causing a degradation in an ejection of a drop produced by the drop ejecting element.
A system comprising:
- a mounting assembly to mount an assembly comprising a fluid ejection device comprising a fluid slot, a fluid circulation channel in communication with the fluid slot, a fluid ejection chamber, a drop ejecting element in the fluid ejection chamber, and a fluid circulating element to circulate fluid from the fluid slot through the fluid circulation channel and the fluid ejection chamber;
- an electronic controller;
- and
- a non-transitory storage medium storing instructions executable by the electronic controller to:
- initiate, in response to detecting that a decap time limit has been violated, on-demand circulation of fluid from the fluid slot through the fluid circulation channel and the fluid ejection chamber by operation of the fluid circulating element, wherein the decap time limit represents an amount of time a nozzle can remain uncapped and exposed to an ambient condition without causing a degradation in an ejection of a drop produced by the drop ejecting element.
A non-transitory machine-readable storage medium comprising instructions that upon execution cause a controller to:
- control operation of a fluid ejection device comprising a fluid slot, a fluid circulation channel in communication with the fluid slot, a fluid ejection chamber, a drop ejecting element in the fluid ejection chamber, and a fluid circulating element to circulate fluid from the fluid slot through the fluid circulation channel and the fluid ejection chamber;
- and
- control on-demand circulation of fluid from the fluid slot through the fluid circulation channel and the fluid ejection chamber by operation of the fluid circulating element, wherein the controlling of the on-demand circulation by the operation of the fluid circulating element comprises initiating the on-demand circulation in response to detecting that a decap time limit has been violated, the decap time limit representing an amount of time a nozzle can remain uncapped and exposed to an ambient condition without causing a degradation in an ejection of a drop produced by the drop ejecting element.
Dependencies are inferred from the claim text.