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US 2018/0001656 A1Published application
Print system with volume substantially void of liquid
AssigneeHewlett-Packard Development Company, L.P.
InventorsKevin E. SWIER, David R. OTIS
Life of this patent
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Abstract
A print system or a method to apply a negative pressure to a substantially dry volume through at least one vent.
Claims15
A method of starting usage of a print system, wherein
- a negative pressure is applied to at least one gas-filled volume through at least one vent;
- while a pressure in the volume decreases, the gas is drawn out through the vent and print liquid is moved into the volume;
- and
- the volume is filled with the liquid so that one side of the vent is covered with the liquid whereby the pressure in the volume increases up to a point where it becomes relatively steady.
1 more element
A print system, comprising
- a volume substantially void of liquid that includes at least one vent to vent gas out, and a nozzle array;
- a negative pressure pump assembly to apply a negative pressure to the vent that exceeds a wetted vent bubble pressure of the vent;
- and
- a controller to
- initiate a startup routine by instructing the pump assembly to actively refresh negative pressure during a relatively long accumulated time span;
- and
- after completing the startup routine, instruct the pump assembly to refresh negative pressure during a relatively short accumulated time span.
4 more elements
Dependencies are inferred from the claim text.