Fluid ejection apparatus
AssigneeHewlett-Packard Development Company, L.P.
InventorsAlexander N. Govyadinov, Paul A. Richards
Life of this patent
Estimating the term…
Abstract
A fluid ejection apparatus (20, 220, 320, 420, 520, 620, 720, 820, 920, 1020, 1120, 1220, 1320, 1420, 1490, 1720, 1820) and method eject a droplet of fluid using a drop generator (46, 246, 1546) receiving fluid from a passage (44, 244, 1344, 1444, 1494, 1544, 1744) having an inlet (54, 254, 1554) adjacent a fluid slot (40, 240, 1540) and an outlet (56, 256, 1556) spaced from the inlet (54, 254, 1554) and adjacent the fluid slot (40, 240, 1540). Fluid is drawn through a filter (50, 250, 650, 1550) with a pump (48, 248, 1548) within the passage (44, 244, 1344, 1444, 1494, 1544, 1744) that pumps the fluid towards the inlet (54, 254, 1554) to the drop generator (46, 246, 1546).
Claims18
A fluid ejection apparatus comprising:
- a fluid slot;
- a passage having an inlet connected to the fluid slot and an outlet spaced from the inlet and connected to the fluid slot;
- a drop generator along the passage;
- a fluid circulation pump between the drop generator and the inlet;
- and
- a filter across the passage between the fluid slot and the fluid circulation pump;
- a second passage having a second inlet connected to the fluid slot and a second outlet spaced from the second inlet and connected to the fluid slot;
- a second drop generator along the second passage;
- and
- a second fluid circulation pump, wherein the filter continuously extends across the inlet and the second inlet and wherein the outlet and the second outlet each have a corresponding opening in the filter.
A fluid ejection apparatus comprising:
- a fluid slot;
- a first passage having a first inlet connected to the fluid slot and a first outlet spaced from the first inlet and connected to the fluid slot;
- a first drop generator along the first passage;
- a first fluid circulation pump between the first drop generator and the first inlet;
- a second passage having a second inlet connected to the fluid slot and a second outlet spaced from the inlet and connected to the fluid slot, the second inlet and the second outlet located on a side of the slot opposite to the first inlet and the first outlet;
- a second drop generator along the second passage;
- a second fluid circulation pump between the second drop generator and the second inlet;
- and
- at least one filter across the first passage between the fluid slot and the first fluid circulation pump and across the second passage between the fluid slot and the second fluid circulation pump.
A fluid ejection apparatus comprising:
- a fluid slot;
- a passage having an inlet connected to the fluid slot and an outlet spaced from the inlet and connected to the fluid slot;
- a drop generator along the passage;
- a fluid circulation pump between the drop generator and the inlet;
- wherein the passage comprises:
- a first portion having a first cross-sectional area adjacent the drop generator and extending to the outlet;
- and
- a second portion having a second cross-sectional area less than the first cross-sectional area and extending from the drop generator to the inlet.
Dependencies are inferred from the claim text.