US5151120A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solid ink compositions for thermal ink-jet printing having improved printing characteristics
Assignee: HP Inc
•
Filing: 1991-04-12
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Granted: 1992-09-29
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Expires: 2011-04-12
Abstract
Abstract Disclosed is an ink-jet composition including an organic carrier that is solid at 25° C. and liquid at the operating temperature of an ink-jet nozzle and a driver having a critical pressure greater than 10 atmospheres, the carrier and driver being miscible in liquid phase. The ink-jet composition is characterized by a viscosity of less than 15 centipoise at 90° C. and a surface tension of between about 20 to about 25 dynes per centimeter at 90° C. The ink-jet compositions disclosed herein are particularly useful in thermal ink-jet printing using thermally induced vapor bubbles to eject ink droplets from the printer and onto a substrate.
Inventors
- 👤 Young S. You
- 👤 John D. Meyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:53
CPC Classifications
C; C09; C09D; C09D11/00; C09D11/30; C09D11/34
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
132 words
An ink-jet composition comprising: from about 30 to about 94.5 weight percent of a carrier that is solid at 25° C. and liquid at the operating temperature of an ink-jet; at least about 5 weight percent of an added driver which is miscible with said carrier and which has a critical pressure of at least 15 atmospheres, a boiling point of from about 100° C. to about 300° C. and a vapor pressure at 20° C. of less than about 0.04 atmospheres; and from about 0.05 to about 5 weight percent of a colorant wherein said composition is a solid at 25° C., has a viscosity at 90° C. of 15 centipoise or less and has a surface tension at 90° C. of from about 20 to about 25 dynes per centimeter.
Claim 2
Dependent Claim
132 words
An ink-jet composition comprising: from about 30 to about 94.5 weight percent of a carrier that is solid at 25° C. and liquid at the operating temperature of an ink-jet; at least about 5 weight percent of an added driver which is miscible with said carrier and which has a critical pressure of at least 15 atmospheres, a boiling point of from about 100° C. to about 300° C. and a vapor pressure at 20° C. of less than about 0.04 atmospheres; and from about 0.05 to about 5 weight percent of a colorant wherein said composition is a solid at 25° C., has a viscosity at 90° C. of 15 centipoise or less and has a surface tension at 90° C. of from about 20 to about 25 dynes per centimeter.
Claim 3
Dependent Claim
21 words
The ink composition according to claim 1 wherein said driver has a boiling point of between 180° C. and 250° C.
Claim 4
Dependent Claim
22 words
The ink composition according to claim 1 wherein said driver has a vapor pressure at 20° C. of less than 0.025 atmospheres.
Claim 5
Dependent Claim
36 words
The ink composition according to claim 1 wherein said driver is selected from the group consisting of C 4 to C 18 alcohols, C 2 to C 10 polyols, and C 4 to C18 glycol ethers.
Claim 6
Dependent Claim
21 words
The ink composition according to claim 4 wherein said driver is one or more C 4 to C 18 a alcohols.
Claim 7
Dependent Claim
20 words
The ink composition according to claim 4 wherein said driver is one or more C 2 to C 18 polyols.
Claim 8
Dependent Claim
21 words
The ink composition according to claim 4 wherein said driver is one or more C 4 to C 18 glycol ethers.
Claim 9
Dependent Claim
41 words
The ink composition according to claim 4 wherein said driver is selected from the group consisting of hexyl alcohol, octyl alcohol, benzyl alcohol, ethylene glycol, propylene glycol, 1,2-propanediol, 1,3-propanediols, 2,3-butanediol, diethylene glycol, ethylene glycol monomethyl ether, and propylene glycol monomethyl ether.
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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) | 1995-09-29 | 1996-03-30 | 1996-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-09-29 | 2000-03-30 | 2000-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-09-29 | 2004-03-30 | 2004-09-29 | $7700.00 | Window Closed / Lapsed |