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US 2002/0163563 A1Published application
Feed channels of a fluid ejection device
AssigneeHewlett-Packard Development Company, L.P.
InventorDustin W. Blair
Life of this patent
Estimating the term…
Abstract
Volume of fluid feed channels is adjusted for drop generators that are staggered with respect to a feed edge. In one embodiment, barrier islands are positioned, sized, and/or shaped to adjust the volume. In another embodiment, protrusions or walls thereof are positioned to adjust the volume.
Claims29
A method of ejecting fluid from a device comprising:
- forming a plurality of fluid drop generators including:
- a plurality of heater elements located at different distances from a feed edge;
- a plurality of fluid chambers disposed over the plurality of heater elements, respectively, each fluid chamber defined by opposing walls that extend toward the feed edge;
- and
- a plurality of barrier islands respectively associated with the plurality of fluid chambers, one of the plurality of barrier islands disposed between the opposing walls of each fluid chamber to define a pair of feed channels in each fluid chamber;
- and
- individually selecting the size of each of the plurality of barrier islands to substantially equalize fluidic resistances in the plurality of fluid chambers.
4 more elements
A method of ejecting fluid from a device comprising:
- forming a plurality of fluid drop generators located at different distances from a feed edge, the plurality of fluid drop generators having a plurality of fluid regions that receive fluid and a plurality of barrier islands disposed within the fluid regions, respectively;
- and
- varying the volume of the plurality of fluid regions by varying the size of each of the plurality of barrier islands to thereby equalize fluidic pressure throughout the plurality of fluid regions.
A fluid ejecting device comprising:
- a substrate having a feed edge and a plurality of heater elements located at different distances from the feed edge;
- a barrier layer having a plurality of fluid chambers disposed over the plurality of heater elements, respectively, the plurality of fluid chambers each defined by opposing walls that extend toward the feed edge;
- and
- a plurality of barrier islands respectively associated with the plurality of fluid chambers, one of the plurality of barrier islands disposed between the opposing walls of each fluid chamber, the plurality of barrier islands each have a size that is inversely proportional to the distance between the respective heater element and the feed edge.
1 more element
Dependencies are inferred from the claim text.