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US5091005A
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US
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Inks for bleed-free ink-jet printing on plain paper
Assignee: HP Inc
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Filing: 1990-07-10
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Granted: 1992-02-25
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Expires: 2010-07-10
Abstract
Abstract Inks comprising, by weight, from about 4% to about 10% formamide, from about 1% to about 10% dye, and the balance water when printed on paper from an ink-jet printer have improved resistance to bleed, especially when printed at a rate up to about 3.7 kHz.
Inventors
- 👤 Bruce E. Mueller
- 👤 John L. Stoffel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:29
CPC Classifications
C; C09; C09D; C09D11/00; C09D11/30
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
36 words
An ink-jet ink suitable for ink-jet printing on plain paper, comprising, by weight: (a) from about 4% to less than about 15% formamide, (b) from about 1% to about 10% dye, and (c) the balance water.
Claim 2
Dependent Claim
36 words
An ink-jet ink suitable for ink-jet printing on plain paper, comprising, by weight: (a) from about 4% to less than about 15% formamide, (b) from about 1% to about 10% dye, and (c) the balance water.
Claim 3
Dependent Claim
18 words
An ink of claim 1 which has been buffered at a pH of about 4 to about 10.
Claim 4
Dependent Claim
18 words
An ink of claim 1 which has been buffered at a pH of about 6 to about 7.
Claim 5
Dependent Claim
9 words
An ink of claim 1 which contains a biocide.
Claim 6
Dependent Claim
19 words
An ink of claim 1 wherein the formamide is present in a range from about 5% to about 8%.
Claim 7
Dependent Claim
19 words
An ink of claim 2 wherein the dye is present in a range from about 1% to about 4%.
Claim 8
Independent Claim
69 words
A method of printing adjacent colors by ink-jet which comprises printing a printing a pattern on plain paper, allowing the pattern to dry, and printing at a rate up to about 3.7 kHz an adjacent pattern with a different color ink, the inks comprising, by weight, (a) from about 4% to less than about 15% formamide, (b) from about 1% to about 10% dye, and (c) the balance water.
Claim 9
Independent Claim
69 words
A method of printing adjacent colors by ink-jet which comprises printing a printing a pattern on plain paper, allowing the pattern to dry, and printing at a rate up to about 3.7 kHz an adjacent pattern with a different color ink, the inks comprising, by weight, (a) from about 4% to less than about 15% formamide, (b) from about 1% to about 10% dye, and (c) the balance water.
Claim 10
Dependent Claim
14 words
A method of claim 7 wherein the rate of printing is about 2 kHz.
Claim 11
Dependent Claim
19 words
An ink of claim 1 wherein the formamide is present in a range from about 4% to about 10%.
Claim 12
Dependent Claim
19 words
A method of claim 8 wherein the formamide is present in a range from about 4% to about 10%.
References Cited (Backward Citations)
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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) | 1995-02-24 | 1995-08-26 | 1996-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-02-24 | 1999-08-26 | 2000-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-02-24 | 2003-08-26 | 2004-02-25 | $7700.00 | Window Closed / Lapsed |