US6036759A
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US
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Black to color bleed control in ink-jet printing inks
Assignee: Hewlett Packard Development Co LP
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Filing: 1998-04-30
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Granted: 2000-03-14
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Expires: 2018-04-30
Abstract
Abstract The ink set of this invention comprises an anionic black pigmented ink and at least one color ink containing a dye or pigment colorant. The performance of these ink sets is improved by the addition of specific cationic surfactant or cationic (quaternary) salts which interact with the anionic black pigmented ink to provide improved black to color bleed control.
Inventors
- 👤 Palitha Wickramanayake
- 👤 Raymond J. Adamic
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:56
CPC Classifications
C; C09; C09D; C09D11/00; C09D11/30; C09D11/40
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
82 words
An ink-jet ink set for ink-jet printing comprising at least one color ink and at least one black ink, wherein said black ink comprises at least one anionic pigment and wherein said color ink comprises a) at least one colorant and b) source of cations selected from the group consisting of cationic surfactants, cationic salts, a tetra alkyl ammonium salt, wherein said alkyl moieties are straight or branched hydrocarbon comprising saturated or unsaturated chains or aromatic subunits of 18 carbons or less.
Claim 2
Dependent Claim
82 words
An ink-jet ink set for ink-jet printing comprising at least one color ink and at least one black ink, wherein said black ink comprises at least one anionic pigment and wherein said color ink comprises a) at least one colorant and b) source of cations selected from the group consisting of cationic surfactants, cationic salts, a tetra alkyl ammonium salt, wherein said alkyl moieties are straight or branched hydrocarbon comprising saturated or unsaturated chains or aromatic subunits of 18 carbons or less.
Claim 3
Dependent Claim
20 words
An ink-jet ink set according to claim 1 wherein said black ink comprises said black pigment and a dispersing agent.
Claim 4
Dependent Claim
16 words
An ink-jet ink set according to claim 1 wherein said anionic pigment is a self-dispersing pigment.
Claim 5
Dependent Claim
30 words
An ink-jet ink set for ink-jet printing according to claim 3 wherein said anionic pigment comprises anionic functional groups selected from the groups consisting of carboxylate, sulfonate and mixtures thereof.
Claim 6
Dependent Claim
27 words
An ink-jet ink set according to claim 1 wherein said color ink comprises from about 0.1% to about 7 wt % of a tetra alkyl ammonium salt.
Claim 7
Dependent Claim
31 words
An ink-jet ink set according to claim 1 wherein said alkyl moieties are selected from the group consisting of methyl, butyl, ethyl, hexyl, octyl, decyl, dodecyl, phenyl, benzyl, and mixtures thereof.
Claim 8
Dependent Claim
28 words
An ink-jet ink set according to claim 6 wherein said tetra alkyl ammonium salt is selected from the group consisting of tetrabutylammonium nitrate, benyltriethylammonium nitrate, and mixture thereof.
Claim 9
Dependent Claim
37 words
An ink-jet ink set according to claim 1 wherein said colorant in said color ink is selected from the groups consisting of nonionic dye, nonionic pigment, anionic dye, anionic pigment, cationic dye, cationic pigment, or mixtures thereof.
Claim 10
Dependent Claim
17 words
An ink-jet ink set according to claim 1 wherein said inks further comprise an inkjet ink vehicle.
Claim 11
Dependent Claim
17 words
An inkjet ink set according to claim 9 wherein said color ink further comprise an organic acid.
Claim 12
Dependent Claim
25 words
An ink-jet ink set according to claim 10 wherein said color ink comprises from about 1% to about 3 wt % of the organic acid.
Claim 13
Dependent Claim
16 words
An ink-jet ink set according to claim 11 wherein said organic acid is a succinic acid.
Claim 14
Independent Claim
76 words
A method of reducing color bleed between black ink and color ink, comprising formulating said black ink with at least one anionic pigment and formulating said color ink with a) at least one colorant and with b) selected from the group consisting of cationic surfactants, cationic salts, and mixtures a tetra alkyl ammonium salt, wherein said alkyl moieties are straight or branched hydrocarbon comprising saturated or unsaturated chains or aromatic subunits of 18 carbons or less.
Claim 15
Independent Claim
76 words
A method of reducing color bleed between black ink and color ink, comprising formulating said black ink with at least one anionic pigment and formulating said color ink with a) at least one colorant and with b) selected from the group consisting of cationic surfactants, cationic salts, and mixtures a tetra alkyl ammonium salt, wherein said alkyl moieties are straight or branched hydrocarbon comprising saturated or unsaturated chains or aromatic subunits of 18 carbons or less.
Claim 16
Dependent Claim
25 words
A method of reducing color bleed according to claim 13 wherein said black ink and said color ink are further formulated with an ink-jet vehicle.
Claim 17
Dependent Claim
35 words
A method of reducing color bleed between black ink and color ink according to claim 14 wherein said color ink comprises from about 0.1% to about 7 wt % of said tetra alkyl ammonium salt.
Claim 18
Dependent Claim
39 words
A method of reducing color bleed between black ink and color ink according to claim 13 wherein said alkyl moieties are selected from the group consisting of methyl, ethyl, butyl, hexyl, octyl, decyl, dodecyl, phenyl, benzyl, and mixtures thereof.
Claim 19
Dependent Claim
36 words
A method of reducing color bleed between black ink and color ink according to claim 16 wherein said tetra alkyl ammonium salt is selected from the group consisting of tetrabutylammonium nitrate, benyltriethylammonium nitrate, and mixtures thereof.
Claim 20
Dependent Claim
45 words
A method of reducing color bleed between black ink and color ink according to claim 13 wherein said colorant in said color ink is selected from the groups consisting of nonionic dye, nonionic pigment, anionic dye, anionic pigment, cationic dye, cationic pigment, or mixtures thereof.
Claim 21
Dependent Claim
28 words
A method of reducing color bleed between black ink and color ink according to claim 13 wherein said black ink comprises said black pigment and a dispersing agent.
Claim 22
Dependent Claim
24 words
A method of reducing color bleed between black ink and color ink according to claim 13 wherein said anionic pigment is a self-dispersing pigment.
Claim 23
Dependent Claim
35 words
A method of reducing color bleed between black ink and color ink according to claim 20 wherein said anionic pigment comprises anionic functional groups selected from the groups consisting of carboxylate, sulfonate and mixtures thereof.
Claim 24
Dependent Claim
25 words
A method of reducing color bleed between black ink and color ink according to claim 13 wherein said color ink further comprise an organic acid.
Claim 25
Dependent Claim
33 words
A method of reducing color bleed between black ink and color ink according to claim 22 wherein said color ink comprises from about 1% to about 3 wt % of the organic acid.
Claim 26
Dependent Claim
23 words
A method of reducing color bleed between black ink and color ink according to claim 23 wherein said organic acid is succinic acid.
References Cited (Backward Citations)
US5320668A
Cited
US5181045A
Cited
US5198023A
Cited
US5428383A
Cited
US5488402A
Cited
US5555008A
Cited
US5476540A
Cited
US5536306A
Cited
US5750594A
Cited
US5518534A
Cited
US5679143A
Cited
US5785743A
Cited
US5730790A
Cited
US5700317A
Cited
US5735941A
Cited
US5713993A
Cited
EP0838507A1
Cited
US5853465A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2003-03-14 | 2003-09-13 | 2004-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-03-14 | 2007-09-13 | 2008-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-03-14 | 2011-09-13 | 2012-03-14 | $7700.00 | Window Closed / Lapsed |