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AssigneeHewlett-Packard Development Company, L.P.
InventorsDaniel D. Dowell, Louis C. Barinaga, Ashley E. Childs
Estimating the term…
Techniques for improving reliability of print cartridges that employ a fluid recirculation path within the cartridges. One reliability feature is provided by active heat management, wherein the recirculation path is employed to provide printhead cooling. Another feature is an in-printer printhead and standpipe priming technique. Idle time tolerance can also be improved, with the ability to re-circulate ink and purge air, to provide a mode of operation that can improve the reliability of the print cartridge during idle times. A “cleaning fluid” can be introduced that could break-up the sludge as it circulates through the print cartridge. Improved particle filtering is provided, through fluid recirculating through the system, passing through the standpipe or plenum area and across the backside of the printhead. As the fluid moves through this region, particles trapped in the standpipe get swept out of the area and eventually through a filter before reaching the printhead again
A method for recirculating fluid through a print cartridge including a cartridge housing structure and a fluid ejecting structure carried by the housing structure, comprising:
A method for managing heat in a fluid ejecting structure mounted to a housing structure, comprising:
A method for priming a print cartridge having a housing, a print head, a fluid plenum in fluid communication with the print head, a means for maintaining fluid under negative pressure in said fluid plenum, and an ink reservoir in fluid communication with the fluid plenum, the method comprising:
A method of maintaining a print cartridge having a fluid ejecting structure in a printing system, comprising:
A method of maintaining a print cartridge in a printing system, the print cartridge including a comprising:
Dependencies are inferred from the claim text.