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US 5,289,212 AGranted
Air vent for an ink supply cartridge in a thermal ink-jet printer
AssigneeXerox Corporation
InventorMichael Carlotta
Life of this patent
Estimating the term…
Abstract
A cartridge for supplying liquid ink to a thermal ink-jet printing apparatus includes a chamber having a ventilation port and an outlet port. A medium occupies at least a portion of the chamber, for retaining liquid ink therein at a predetermined back pressure. An open-ended conduit defines a passageway extending from the ventilation port to a portion of the chamber substantially devoid of liquid ink, to prevent leakage of liquid ink from the cartridge.
Claims11
A cartridge for supplying liquid ink on demand to an ink-jet printhead, comprising:
- a housing having a first chamber and a second chamber, the first chamber having a ventilation port and an outlet port, the outlet port communicating with the ink-jet printhead;
- a medium occupying at least a portion of the first chamber, for retaining liquid ink therein at a predetermined back pressure;
- an open-ended conduit defining a passageway extending from the ventilation port to a portion of the first chamber substantially devoid of liquid ink, to prevent leakage of liquid ink from the cartridge;
- the second chamber being separate from the first chamber and adjacent the ventilation port, the conduit forming a communication between the second chamber and the portion of the first chamber substantially devoid of liquid ink.
1 more element
Dependencies are inferred from the claim text.