US5242489A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ink jet printing processes
Assignee: Xerox Corp
•
Filing: 1992-12-01
•
Granted: 1993-09-07
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Expires: 2012-12-01
Abstract
Abstract Disclosed is an ink composition which comprises an aqueous liquid vehicle, a colorant, and a polymeric additive of the formula ##STR1## wherein R 1 and R 2 are independently selected from the group consisting of hydrogen, alkyl groups with from 1 to about 8 carbon atoms, and alkoxy groups with from 1 to about 8 carbon atoms, R 3 and R 4 are independently selected from the group consisting of alkyl groups with from 1 to about 4 carbon atoms, and x and y are each independently a number of from about 100 to about 400, present in an amount of at least about 1 part per million. The ink is suitable for use in ink jet printing processes, particularly thermal ink jet printing processes.
Inventors
- 👤 William M. Schwarz, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:27
CPC Classifications
C; C09; C09D; C09D11/00; C09D11/30
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
132 words
A process which comprises incorporating into an ink jet printer an ink composition comprising an aqueous liquid vehicle, a colorant, and a polymeric additive of the formula ##STR9## wherein R 1 and R 2 are independently selected from the group consisting of hydrogen, alkyl groups with from 1 to about 8 carbon atoms, and alkoxy groups with from 1 to about 8 carbon atoms, R 3 and R 4 are independently selected from the group consisting of alkyl groups with from 1 to about 4 carbon atoms, and x and y are each independently a number of from about 100 to about 400, present in an amount of at least about 1 part per million, and causing droplets of the ink composition to be ejected in an imagewise pattern onto a substrate.
Claim 2
Dependent Claim
132 words
A process which comprises incorporating into an ink jet printer an ink composition comprising an aqueous liquid vehicle, a colorant, and a polymeric additive of the formula ##STR9## wherein R 1 and R 2 are independently selected from the group consisting of hydrogen, alkyl groups with from 1 to about 8 carbon atoms, and alkoxy groups with from 1 to about 8 carbon atoms, R 3 and R 4 are independently selected from the group consisting of alkyl groups with from 1 to about 4 carbon atoms, and x and y are each independently a number of from about 100 to about 400, present in an amount of at least about 1 part per million, and causing droplets of the ink composition to be ejected in an imagewise pattern onto a substrate.
Claim 3
Dependent Claim
22 words
A process according to claim 1 wherein x and y are each independently a number of from about 100 to about 200.
Claim 4
Dependent Claim
28 words
A process according to claim 1 wherein the polymeric additive is present in an amount of from about 0.0001 percent by weight to about 1 percent by weight.
Claim 5
Dependent Claim
28 words
A process according to claim 1 wherein the polymeric additive is present in an amount of from about 0.0001 percent by weight to about 0.5 percent by weight.
Claim 6
Dependent Claim
30 words
A process according to claim 1 wherein the polymeric additives of the formula ##STR10## wherein x and y are each independently a number of from about 100 to about 400.
Claim 7
Dependent Claim
16 words
A process according to claim 1 wherein the aqueous liquid vehicle comprises water and a humectant.
Claim 8
Dependent Claim
12 words
A process according to claim 6 wherein the humectant is cyclohexyl pyrrolidone.
Claim 9
Dependent Claim
12 words
A process according to claim 1 wherein the colorant is a dye.
Claim 10
Dependent Claim
12 words
A process according to claim 1 wherein the colorant is a pigment.
Claim 11
Dependent Claim
43 words
A process according to claim 1 wherein the liquid vehicle is present in an amount of from about 75 to about 99 percent by weight and the colorant is present in an amount of from about 1 to about 15 percent by weight.
Claim 12
Dependent Claim
21 words
A process according to claim 1 wherein the polymeric additive has a molecular weight of from about 14,000 to about 22,000.
Claim 13
Dependent Claim
20 words
A process according to claim 1 wherein the viscosity of the ink is from about 1 to about 5 centipoise.
Claim 14
Dependent Claim
35 words
A process according to claim 1 wherein the ink jet printer is a thermal ink jet printer and the droplets are caused to be ejected by heating the ink and causing bubbles to from therein.
Claim 15
Dependent Claim
22 words
A process according to claim 13 wherein x and y are each independently a number of from about 100 to about 200.
Claim 16
Dependent Claim
28 words
A process according to claim 13 wherein the polymeric additives is present in an amount of from about 0.0001 percent by weight to about 1 percent by weight.
Claim 17
Dependent Claim
28 words
A process according to claim 13 wherein the polymeric additive is present in an amount of from about 0.0001 percent by weight to about 0.5 percent by weight.
Claim 18
Dependent Claim
31 words
A process according to claim 13 wherein the polymeric additive is of the formula ##STR11## wherein x and y are each independently a number of from about 100 to about 400.
Claim 19
Dependent Claim
21 words
A process according to claim 13 wherein the polymeric additives has a molecular weight of from about 14,000 to about 22,000.
Claim 20
Dependent Claim
20 words
A process according to claim 13 wherein the viscosity of the ink is from about 1 to about 5 centipoise.
Claim 21
Dependent Claim
16 words
A process according to claim 13 wherein the aqueous liquid vehicle comprises water and cyclohexyl pyrrolidone.
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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) | 1996-09-06 | 1997-03-08 | 1997-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-09-06 | 2001-03-08 | 2001-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-09-06 | 2005-03-08 | 2005-09-07 | $7700.00 | Window Closed / Lapsed |