Standpipe crossflow circulation
AssigneeHewlett-Packard Development Company, L.P.
InventorsBenjamin H. Wood, Paul Mark Haines, Angela W. Bakkom, Anjan Prabhat Pattathil, Franklin D. Derryberry
Life of this patent
Estimating the term…
Abstract
A fluid ejection and circulation apparatus may include a fluid ejection die, the pressure regulator, a first standpipe, a second standpipe and a crossflow passage. The pressure regulator has a fluid chamber. The first standpipe is between the fluid chamber and the fluid ejection die. The first standpipe has a first port above the fluid ejection die. The second standpipe extends alongside the first standpipe. The second standpipe has a second port above the fluid ejection die. The crossflow passage connects the first standpipe and the second standpipe.
Claims20
A fluid ejection and circulation apparatus comprising:
- a fluid ejection die;
- a pressure regulator having a fluid chamber;
- a first standpipe between the fluid chamber and the fluid ejection die, the first standpipe having a first port above the fluid ejection die and connected to the fluid chamber;
- a second standpipe extending alongside the first standpipe, the second standpipe having a second port above the fluid ejection die;
- and
- a crossflow passage connecting the first standpipe and the second standpipe.
A fluid ejection and circulation apparatus comprising:
- a fluid ejection die;
- a first pressure regulator comprising a first fluid chamber;
- a second pressure regulator comprising a second fluid chamber;
- a first standpipe between the first fluid chamber and the fluid ejection die, the first standpipe having a first port connecting the first fluid chamber to the first standpipe proximate a first end of the fluid ejection die;
- a second standpipe having a second port connecting the second fluid chamber to the second standpipe proximate the first end of the fluid ejection die;
- a crossflow passage connecting the first standpipe and the second standpipe proximate a second end of the fluid ejection die;
- and
- an imperforate wall extending between the first standpipe and the second standpipe from the first port to the crossflow passage.
A method comprising:
- supplying fluid from a pressure regulator to a first standpipe opposite a fluid ejection die through a first port of a first standpipe;
- circulating the fluid along a first axis within the first standpipe over a first fluid supply slot or a second fluid feed hole leading to a fluid ejection device of the fluid ejection die and from the first standpipe to a second standpipe, along a second axis nonparallel to the first axis, through a crossflow passage connecting the first standpipe and the second standpipe, the second standpipe having a second port;
- and
- circulating the fluid along a third axis that is parallel to and alongside the first axis, within the second standpipe over a second fluid supply slot or a second fluid feed hole leading to a second fluid ejection device of the fluid ejection die and to the second port.
Dependencies are inferred from the claim text.