US6929362B2
Expired / Lapsed
US
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Ink set and image forming process, and water-based ink used therein
Assignee: Canon Inc
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Filing: 2003-12-16
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Granted: 2005-08-16
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Expires: 2023-12-16
Abstract
Abstract An ink set including a water-based ink containing a coloring material in a state dissolved or dispersed in an aqueous medium and a water-based reactive liquid containing a first component for insolubilizing or aggregating the coloring material in the ink by mixing with the water-based ink. The water-based reactive liquid contains a water-soluble high-molecular compound in a state dissolved therein. The water-based ink contains a second component, which is not insolubilized by the first component and the coloring material, in a state dissolved therein. The water-soluble high-molecular compound is not insolubilized by the first component and the coloring material but insolubilized by the second component.
Inventors
- 👤 Yoichi Takada
- 👤 Shinya Mishina
- 👤 Shinichi Hakamada
- 👤 Yasuhiro Nito
- 👤 Masashi Tsujimura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:03
CPC Classifications
C; C09; C09D; C09D11/00; C09D11/30; B; B41; B41M; B41M5/00; B41M5/0011; B41M5/0017; B41M7/00; B41M7/0018
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
107 words
An ink set comprising a water-based ink containing a coloring material in a state dissolved or dispersed in an aqueous medium and a water-based reactive liquid containing a first component for insolubilizing or aggregating the coloring material in the ink by mixing with the water-based ink, wherein the water-based reactive liquid contains a water-soluble high-molecular compound in a state dissolved therein, the water-based ink contains a second component, which is not insolubilized by the first component and the coloring material, in a state dissolved therein, and the water-soluble high-molecular compound is not insolubilized by the first component and the coloring material but insolubilized by the second component.
Claim 2
Dependent Claim
107 words
An ink set comprising a water-based ink containing a coloring material in a state dissolved or dispersed in an aqueous medium and a water-based reactive liquid containing a first component for insolubilizing or aggregating the coloring material in the ink by mixing with the water-based ink, wherein the water-based reactive liquid contains a water-soluble high-molecular compound in a state dissolved therein, the water-based ink contains a second component, which is not insolubilized by the first component and the coloring material, in a state dissolved therein, and the water-soluble high-molecular compound is not insolubilized by the first component and the coloring material but insolubilized by the second component.
Claim 3
Dependent Claim
16 words
The ink set according to claim 1 , wherein the first component is a cationic substance.
Claim 4
Dependent Claim
24 words
The ink set according to claim 1 , wherein the first component contains at least one selected from polyvalent metal ions and salts thereof.
Claim 5
Dependent Claim
29 words
The ink set according to claim 3 , wherein the polyvalent metal is at least one selected from Ca, Cu, Ni, Mg, Zn, Ba, Al, Fe, Cr and Y.
Claim 6
Dependent Claim
34 words
The ink set according to claim 1 , wherein the coloring material in the ink contains either an anionic dye or a pigment having a surface to which an anionic group is chemically bonded.
Claim 7
Dependent Claim
24 words
The ink set according to claim 1 , wherein the ink contains a pigment as the coloring material and additionally an anionic dispersing agent.
Claim 8
Dependent Claim
24 words
The ink set according to claim 1 , wherein the second component is such that causes the water-soluble high-molecular compound to gel or crosslink.
Claim 9
Dependent Claim
17 words
The ink set according to claim 1 , wherein the water-soluble high-molecular compound has a hydroxyl group.
Claim 10
Dependent Claim
16 words
The ink set according to claim 8 , wherein the water-soluble high-molecular compound is polyvinyl alcohol.
Claim 11
Dependent Claim
19 words
The ink set according to claim 9 , wherein the second component is boric acid or a salt thereof.
Claim 12
Dependent Claim
17 words
The ink set according to claim 1 , wherein the water-soluble high-molecular compound has an acetoacetyl group.
Claim 13
Dependent Claim
15 words
The ink set according to claim 11 , wherein the second component is adipic dihydrazide.
Claim 14
Dependent Claim
89 words
A process for forming an image on a recording medium, comprising the steps of: (i) applying the water-based ink making up the ink set according to any one of claims 1 to 12 to a recording medium by an inkjet recording method; and (ii) applying the water-based reactive liquid making up the ink set to the recording medium, wherein the step (ii) is conducted prior to the step (i) in such a manner that the water-based ink comes into contact with the water-based reactive liquid on the recording medium.
Claim 15
Dependent Claim
36 words
The image forming process according to claim 13 , wherein the step (ii) is conducted to an area wider than an area of the recording medium, to which the ink is applied in the step (i).
Claim 16
Dependent Claim
67 words
A water-based ink suitable for use in conducting ink-jet recording on a recording medium, to which a water-based reactive liquid containing a water-soluble high-molecular compound and a first component for insolubilizing or aggregating a coloring material has been applied, wherein the ink contains the coloring material in a state dissolved or dispersed in an aqueous medium and has a second component for insolubilizing the water-soluble high-molecular compound.
Claim 17
Dependent Claim
67 words
A water-based ink suitable for use in conducting ink-jet recording on a recording medium, to which a water-based reactive liquid containing a water-soluble high-molecular compound and a first component for insolubilizing or aggregating a coloring material has been applied, wherein the ink contains the coloring material in a state dissolved or dispersed in an aqueous medium and has a second component for insolubilizing the water-soluble high-molecular compound.
Claim 18
Dependent Claim
25 words
The image forming process according to claim 13 , wherein the water-based reactive is applied to the recording medium by roller coating or bar coating.
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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) | 2008-08-15 | 2009-02-14 | 2009-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2012-08-15 | 2013-02-14 | 2013-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2016-08-15 | 2017-02-14 | 2017-08-16 | $7700.00 | Window Closed / Lapsed |