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US 11,590,762 B2Granted
Recirculations using two pumps
AssigneeHewlett-Packard Development Company, L.P.
InventorsWesley R. Schalk, Kenneth Williams, Christopher John Arnold
Life of this patent
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Abstract
A method of recirculating printing fluid that includes with a first pump upstream of an internal reservoir, pumping printing fluid into the reservoir and with a second pump downstream of the internal reservoir and upstream of a pen assembly, pumping printing fluid from the reservoir.
Claims15
A method of recirculating printing fluid, comprising:
- with a first pump upstream of an internal reservoir, pumping printing fluid into the internal reservoir;
- and
- with a second pump downstream of the internal reservoir and upstream of a pen assembly, pumping printing fluid from the reservoir.
A printing device, comprising:
- an internal reservoir;
- a first pump fluidically coupled to and upstream of the internal reservoir;
- a second pump downstream of the internal reservoir and upstream of a pen assembly;
- and
- a recirculation module to selectively activate the first and second pump to recirculate an amount of printing fluid through the internal reservoir.
2 more elements
A non-transitory computer readable storage medium comprising computer usable program code embodied therewith, the computer usable program code to, when executed by a processor:
- execute a recirculation module to:
- activate a first pump upstream of an internal reservoir to pump printing fluid into the reservoir;
- and
- activate a second pump downstream of the internal reservoir and upstream of a pen assembly to pump printing fluid from the reservoir.
1 more element
Dependencies are inferred from the claim text.