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.
Claims12
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, the controlling of the on-demand circulation by the operation of the fluid circulating element comprising varying a frequency or a number of circulation pulses of the operation of the fluid circulating element for a printing system, wherein the controlling causes performance of the on-demand circulation before operation of the drop ejecting element, and provision of a delay between the on-demand circulation and the operation of the drop ejecting element, and wherein the delay is less than a time period corresponding to a frequency of operation of the drop ejecting element.
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, the controlling of the on-demand circulation by the operation of the fluid circulating element comprising varying a frequency or a number of circulation pulses of the operation of the fluid circulating element for a printing system, wherein the controlling causes performance of the on-demand circulation before operation of the drop ejecting element, and wherein the on-demand circulation is performed without a delay between the on-demand circulation and the operation of 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:
- 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, the controlling of the on-demand circulation by the operation of the fluid circulating element comprising varying a frequency or a number of circulation pulses of the operation of the fluid circulating element for a printing system, wherein the controlling causes performance of the on-demand circulation before operation of the drop ejecting element, and provision of a delay between the on-demand circulation and the operation of the drop ejecting element, and wherein the delay is less than a time period corresponding to a frequency of operation of the drop ejecting element.
Dependencies are inferred from the claim text.