US5289212A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air vent for an ink supply cartridge in a thermal ink-jet printer
Assignee: Samsung Electronics Co Ltd
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Filing: 1992-05-19
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Granted: 1994-02-22
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Expires: 2012-05-19
Abstract
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.
Inventors
- 👤 Michael Carlotta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:34
CPC Classifications
B; B41; B41J; B41J2/00; B41J2/005; B41J2/01; B41J2/17; B41J2/175
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
130 words
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.
Claim 2
Dependent Claim
130 words
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.
Claim 3
Dependent Claim
19 words
A cartridge as in claim 1, further comprising a substantially liquid-impermeable filter disposed at one end of the conduit.
Claim 4
Dependent Claim
23 words
A cartridge as in claim 1, further comprising a negative wetting agent disposed on an internal surface of the conduit defining the passageway.
Claim 5
Dependent Claim
22 words
A cartridge as in claim 1, wherein the medium defines a channel, the conduit being disposed within at least a portion thereof.
Claim 6
Dependent Claim
28 words
A cartridge as in claim 1, further comprising a scavenger member disposed across the outlet port, providing a capillary force greater than a capillary force of the medium.
Claim 7
Dependent Claim
20 words
A cartridge as in claim 5, wherein a portion of the medium directly contacts a surface of the scavenger member.
Claim 8
Dependent Claim
13 words
A cartridge as in claim 5, wherein the scavenger member comprises melamine foam.
Claim 9
Dependent Claim
16 words
A cartridge as in claim 5, further comprising a filter cloth attached to the scavenger member.
Claim 10
Dependent Claim
16 words
A cartridge as in claim 8, wherein the filter cloth comprises a monofilament polyester screening fabric.
Claim 11
Dependent Claim
20 words
A cartridge as in claim 1, wherein the medium comprises a needled felt made from at least two polyester fibers.
Claim 12
Dependent Claim
23 words
A cartridge as in claim 1, wherein the housing defines an air exchange aperture coupled to the ventilation port through the second chamber.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-02-21 | 1997-08-23 | 1998-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-02-21 | 2001-08-23 | 2002-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-02-21 | 2005-08-23 | 2006-02-22 | $7700.00 | Window Closed / Lapsed |