Ink refill unit with threaded incremental ink ejection for print cartridge
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United States of America Patent
Stats
-
Apr 20, 2010
Grant Date -
Nov 13, 2008
app pub date -
Jul 22, 2008
filing date -
Jan 21, 2004
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An ink refill unit for a print cartridge is provided. The unit includes a housing which defines a fluid path in fluid communication with an outlet. The unit also includes an ink reservoir having an ejection port arranged in fluid communication with the fluid path inside the housing, and an ejector assembly configured to incrementally eject ink from the reservoir when the assembly is actuated by the print cartridge. The ejector assembly includes a plunger having a toothed thread which engages with a screw thread provided in an internal wall of the housing. The ejector has a drive gear so that actuation of the drive gear imparts rotation to the toothed thread so as to rotate the plunger within the screw thread of the housing to eject ink from a bellows-like reservoir.
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Cited Art Landscape
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