Ink refill unit for a negatively pressurized ink reservoir of a printer cartridge
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United States of America Patent
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Jun 23, 2009
Grant Date -
Jan 31, 2008
app pub date -
Oct 15, 2007
filing date -
Jan 21, 2004
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A refill unit is provided for a printer cartridge with an operatively, negatively pressurized ink reservoir. The unit has a docking assembly for docking with the printer cartridge. An ink bag stores ink and is housed in the docking assembly. A valve actuator is shaped and configured to actuate an outlet valve of the ink reservoir into a closed position and thereafter to actuate an inlet valve of the ink reservoir into an open position when the docking assembly docks with the cartridge. An ink delivery outlet assembly is arranged on the docking assembly in fluid communication with the ink bag and has a seal configured to allow ink to flow from the ink bag to the ink reservoir only when the refill unit engages the cartridge. Constrictor actuators are engageable with the cartridge and are configured to increase pressure in the ink bag during ink flow from the ink bag to the ink reservoir, and to permit a re-establishment of negative pressure in the ink reservoir upon disengagement from the cartridge.
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