Head cartridge and liquid-ejecting apparatus

Details Head cartridge and liquid-ejecting apparatus Head cartridge and liquid-ejecting apparatus

2004-10-22

2008-09-23

Huffman, Julian D. (Department: 2853)

Incremental printing of symbolic information

Ink jet

Fluid or fluid source handling means

C347S086000, C347S089000

Reexamination Certificate

active

07427127

ABSTRACT:
A negative pressure generated inside a liquid-ejecting head can circulate liquid between the liquid-ejecting head and a liquid tank, prevent the liquid from leaking out of nozzles while the liquid is circulating, and remove bubbles contained in the liquid. A head cartridge includes a printhead ejecting ink from ink-ejecting nozzles formed in a nozzle plate of the printhead, an ink-supplying conduit supplying the ink from an ink tank to an ink chamber in the printhead, an ink-refluxing conduit refluxing the ink from the printhead to the ink tank, and a liquid-delivering pump disposed on the ink-refluxing conduit and circulating the ink between the printhead and the ink tank. The liquid-delivering pump is driven to generate a negative pressure inside the printhead to circulate the ink between the printhead and the ink tank.

REFERENCES:
patent: 4432003 (1984-02-01), Barbero et al.
patent: 5220345 (1993-06-01), Hirosawa
patent: 5818485 (1998-10-01), Rezanka
patent: 6585358 (2003-07-01), Usui et al.
patent: 2002/0118256 (2002-08-01), Dixon et al.
patent: 2004/0085416 (2004-05-01), Kent
patent: 0 931 662 (1999-07-01), None
patent: 07-266571 (1995-10-01), None
Japanese Office Action issued on Dec. 27, 2007 for Japanese Application No. 2003-364939.

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