US5518534A
Expired / Lapsed
US
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Ink set and process for alleviating bleed in printed elements
Assignee: EIDP Inc
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Filing: 1995-08-04
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Granted: 1996-05-21
•
Expires: 2015-08-04
Abstract
Abstract An ink set for alleviating bleed in multicolor printed elements employing a first ink and a second ink, each containing an aqueous carrier medium and a colorant; the colorant in the first ink being a pigment dispersion and the second ink containing a salt of an organic acid or mineral acid having a solubility of at least 10 parts in 100 parts of water at 25° C.
Inventors
- 👤 Kathryn A. Pearlstine
- 👤 Loretta A. G. Page
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 01:14
CPC Classifications
C; C09; C09D; C09D11/00; C09D11/30; C09D11/40
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
93 words
An ink set for alleviating bleed in multicolor printed elements comprising a first ink and a second ink of the same ionic character, each ink having an aqueous carrier medium and a colorant, wherein the colorant of the first ink is a pigment dispersion and the second ink contains a salt of an organic acid or mineral acid having a solubility of at least 10 parts in 100 parts of water at 25° C., said salt being present in an amount effective to alleviate bleed between the first and second inks during printing.
Claim 2
Dependent Claim
93 words
An ink set for alleviating bleed in multicolor printed elements comprising a first ink and a second ink of the same ionic character, each ink having an aqueous carrier medium and a colorant, wherein the colorant of the first ink is a pigment dispersion and the second ink contains a salt of an organic acid or mineral acid having a solubility of at least 10 parts in 100 parts of water at 25° C., said salt being present in an amount effective to alleviate bleed between the first and second inks during printing.
Claim 3
Dependent Claim
13 words
The ink set of claim 1 wherein said salt is an ammonium salt.
Claim 4
Dependent Claim
13 words
The ink set of claim 1 wherein said salt is a metal salt.
Claim 5
Dependent Claim
14 words
The ink set of claim 3 wherein said salt is a divalent metal salt.
Claim 6
Dependent Claim
62 words
The ink set of claim 3 wherein the metal salt comprises a metal cation selected from the group consisting of Na +1 , Li +1 , K +1 , Ca +2 , Cu +2 , Co +2 , Ni +2 , Fe +2 , La +3 , Nd +3 , Y +3 , Zn +2 , Mg +2 and Al +3 .
Claim 7
Dependent Claim
107 words
The ink set of claim 3 wherein the metal salt is selected from the group consisting of NaCl, Ca(NO 3 ) 2 , CaCl 2 , Ca(CH 3 COO) 2 , Al(NO 3 ) 3 , Nd(NO 3 ) 3 , Y(NO 3 ) 3 , Cu(NO 3 ) 2 , Zn(NO 3 ) 2 , CuCl 2 , ZnCl 2 , CoCl 2 , Co(NO 3 ) 2 , NiCl 2 , MgBr 2 , Mg(NO 3 ) 2 , ZnBr 2 , NH 4 Cl, Ni(NO 3 ) 2 , p-toluene sulfonic acid, Na salt; benzene sulfonic acid, Na salt; and sulfanilic acid, Na salt.
Claim 8
Dependent Claim
14 words
The ink set of claim 1 wherein the first and second inks are cationic.
Claim 9
Dependent Claim
14 words
The ink set of claim 1 wherein the first and second inks are anionic.
Claim 10
Dependent Claim
17 words
The ink set of claim 1 wherein the pigment dispersion comprises a pigment and a polymeric dispersing.
Claim 11
Dependent Claim
30 words
The ink set of claim 1 wherein said salt is present in the amount of 0.1 to 15% by weight, based on the total weight of the second ink composition.
Claim 12
Dependent Claim
112 words
A process for creating a multicolor printed element having reduced color bleed, comprising: (a) providing a first ink comprising an aqueous carrier medium and a pigment dispersion colorant; (b) providing a second ink having the same ionic character as said first ink, said second ink comprising an aqueous carrier medium, a colorant, and a salt of an organic acid or mineral acid having a solubility of at least 10 parts in 100 parts of water at 25° C., said salt being present in an amount effective to alleviate between the first and second inks; and (c) applying the first ink and the second ink in contact with each other on a substrate.
Claim 13
Dependent Claim
112 words
A process for creating a multicolor printed element having reduced color bleed, comprising: (a) providing a first ink comprising an aqueous carrier medium and a pigment dispersion colorant; (b) providing a second ink having the same ionic character as said first ink, said second ink comprising an aqueous carrier medium, a colorant, and a salt of an organic acid or mineral acid having a solubility of at least 10 parts in 100 parts of water at 25° C., said salt being present in an amount effective to alleviate between the first and second inks; and (c) applying the first ink and the second ink in contact with each other on a substrate.
Claim 14
Dependent Claim
12 words
The process of claim 11 wherein the salt is an ammonium salt.
Claim 15
Dependent Claim
12 words
The process of claim 11 wherein the salt is a metal salt.
Claim 16
Dependent Claim
13 words
The process of claim 13 wherein the salt is a divalent metal salt.
Claim 17
Dependent Claim
61 words
The process of claim 13 wherein the metal salt comprises a metal cation selected from the group consisting of Na +1 , Li +1 , K +1 , Ca +2 , Cu +2 , Co +2 , Ni +2 , Fe +2 , La +3 , Nd +3 , Y +3 , Zn +2 , Mg +2 and Al +3 .
Claim 18
Dependent Claim
106 words
The process of claim 13 wherein the metal salt is selected from the group consisting of NaCl, Ca(NO 3 ) 2 , CaCl 2 , Ca(CH 3 COO) 2 , Al(NO 3 ) 3 , Nd(NO 3 ) 3 , Y(NO 3 ) 3 , Cu(NO 3 ) 2 , Zn(NO 3 ) 2 , CuCl 2 , ZnCl 2 , CoCl 2 , Co(NO 3 ) 2 , NiCl 2 , MgBr 2 , Mg(NO 3 ) 2 , ZnBr 2 , NH 4 Cl, Ni(NO 3 ) 2 , p-toluene sulfonic acid, Na salt; benzene sulfonic acid, Na salt; and sulfanilic acid, Na salt.
Claim 19
Dependent Claim
16 words
The process of claim 11 wherein the pigment dispersion comprises a pigment and a polymeric dispersant.
Claim 20
Dependent Claim
14 words
The process of claim 11 wherein the first and second inks are cationic ink.
Claim 21
Dependent Claim
13 words
The process of claim 11 wherein the first and second inks are anionic.
Claim 22
Dependent Claim
36 words
The process of claim 11 wherein the salt of an organic acid or mineral acid is present in the amount of 0.1 to 15% by weight, based on the total weight of the second ink composition.
Claim 23
Dependent Claim
10 words
The process of claim 11 wherein the substrate is paper.
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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) | 1999-05-21 | 1999-11-20 | 2000-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-05-21 | 2003-11-20 | 2004-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-05-21 | 2007-11-20 | 2008-05-21 | $7700.00 | Window Closed / Lapsed |