US6733120B2
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US
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Ink set for ink-jet recording, recording method, ink cartridge, recording unit, and ink-jet recording apparatus
Assignee: Canon Inc
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Filing: 2002-06-13
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Granted: 2004-05-11
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Expires: 2022-06-13
Abstract
Abstract An ink set for ink-jet recording that includes a plurality of inks containing coloring materials insoluble in water to form a high quality ink-jet recording image is provided. The water-based ink set for ink-jet recording includes a black ink and a color ink, wherein the black ink contains a carbon black as a coloring material having a volume average particle diameter determined by dynamic light scattering of not less than 50 nm, the color ink contains a pigment as a coloring material having a volume average particle diameter determined by dynamic light scattering of not more than 60 nm, and an accumulative 90% particle diameter of volume particle size distribution of not more than 100 nm, the volume average particle diameter of the carbon black of the black ink is larger than the volume average particle diameter of the pigment of the color ink, and the black ink has a surface tension higher than that of the color ink.
Inventors
- 👤 Masashi Ogasawara
- 👤 Shinichi Tochihara
- 👤 Katsuhiko Takahashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 03:55
CPC Classifications
C; C09; C09D; C09D11/00; C09D11/30; C09D11/40
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
125 words
An ink set for ink-jet recording comprising an aqueous black ink and an aqueous color ink, wherein the black ink comprises a carbon black as a coloring material having a volume average particle diameter determined by dynamic light scattering of not less than 50 nm, the color ink comprises a pigment as a coloring material having a volume average particle diameter determined by dynamic light scattering of not more than 60 nm, and an accumulative 90% particle diameter of volume particle size distribution of not more than 100 nm, the volume average particle diameter of the carbon black is larger than that the pigment in the color ink, and wherein the surface tension of the black ink is higher than that of the color ink.
Claim 2
Dependent Claim
125 words
An ink set for ink-jet recording comprising an aqueous black ink and an aqueous color ink, wherein the black ink comprises a carbon black as a coloring material having a volume average particle diameter determined by dynamic light scattering of not less than 50 nm, the color ink comprises a pigment as a coloring material having a volume average particle diameter determined by dynamic light scattering of not more than 60 nm, and an accumulative 90% particle diameter of volume particle size distribution of not more than 100 nm, the volume average particle diameter of the carbon black is larger than that the pigment in the color ink, and wherein the surface tension of the black ink is higher than that of the color ink.
Claim 3
Dependent Claim
29 words
The ink set according to claim 1 , wherein the color ink is selected from the group consisting of a yellow ink, a magenta ink, and a cyan ink.
Claim 4
Dependent Claim
36 words
The ink set according to claim 2 , wherein the color ink comprises a first magenta ink and a second magenta ink, and the first and second magenta inks are different in concentration of the pigment.
Claim 5
Dependent Claim
37 words
The ink set for ink-jet recording according to claim 2 , wherein the color ink comprises a first cyan ink and a second cyan ink, and the first and second cyan inks are different in pigment concentration.
Claim 6
Dependent Claim
153 words
An ink set for ink-jet recording comprising a black ink, a yellow ink, a magenta ink, and a cyan ink, wherein (a) the black ink comprises at least water and a carbon black, and a volume average particle diameter of the carbon black determined by dynamic light scattering is not less than 50 nm, (b) the yellow, magenta, and cyan inks each comprises at least water and an organic pigment, and a volume average particle diameter of the organic pigment determined by dynamic light scattering is not more than 60 nm, and an accumulative 90% particle diameter of volume particle size distribution is not more than 100 nm, (c) the volume average particle diameter of the carbon black in the black ink is larger than the volume average particle diameter of the organic pigment in each color ink, and the black ink has a higher surface tension than that of the color inks.
Claim 7
Dependent Claim
153 words
An ink set for ink-jet recording comprising a black ink, a yellow ink, a magenta ink, and a cyan ink, wherein (a) the black ink comprises at least water and a carbon black, and a volume average particle diameter of the carbon black determined by dynamic light scattering is not less than 50 nm, (b) the yellow, magenta, and cyan inks each comprises at least water and an organic pigment, and a volume average particle diameter of the organic pigment determined by dynamic light scattering is not more than 60 nm, and an accumulative 90% particle diameter of volume particle size distribution is not more than 100 nm, (c) the volume average particle diameter of the carbon black in the black ink is larger than the volume average particle diameter of the organic pigment in each color ink, and the black ink has a higher surface tension than that of the color inks.
Claim 8
Dependent Claim
20 words
The ink set according to claim 5 , wherein the black ink and the color inks have the same ionicity.
Claim 9
Dependent Claim
13 words
The ink set according to claim 6 , wherein the ionicity is anionic.
Claim 10
Dependent Claim
29 words
The ink set according to claim 7 , wherein the black ink has a first ionicity and the color inks have a second ionicity opposite to the first ionicity.
Claim 11
Dependent Claim
20 words
The ink set according to claim 8 , wherein the fist ionicity is cationic and the second ionicity is anionic.
Claim 12
Dependent Claim
37 words
An ink-jet recording method comprising the steps of: (i) preparing an ink set according to claim 1 ; (ii) applying the black ink to a recording medium; and (iii) applying the color ink to the recording medium.
Claim 13
Dependent Claim
36 words
The ink-jet recording method according to claim 10 , wherein the black ink has a first ionicity and the color inks have a second ionicity and the first ionicity and the second ionicity are the same.
Claim 14
Dependent Claim
25 words
The ink-jet recording method according to claim 11 , wherein the step (iii) is performed at least one scan after the step (ii) was performed.
Claim 15
Dependent Claim
23 words
The ink-jet recording method according to claim 10 , wherein the black ink has a different ionicity from that of the color inks.
Claim 16
Dependent Claim
21 words
The ink-jet recording method according to claim 10 , wherein the steps (ii) and (iii) are performed in one scan operation.
Claim 17
Dependent Claim
35 words
An ink-jet recording method comprising the steps of: (i) preparing the ink set according to claim 5 ; (ii) applying the black ink to recording medium; and (iii) applying the color ink to recording medium.
Claim 18
Dependent Claim
36 words
The ink-jet recording method according to claim 15 , wherein the black ink has a first ionicity and the color inks have a second ionicity, and the first ionicity and the second ionicity are the same.
Claim 19
Dependent Claim
25 words
The ink-jet recording method according to claim 16 , wherein the step (iii) is performed at least one scan after the step (ii) was performed.
Claim 20
Dependent Claim
23 words
The ink-jet recording method according to claim 15 , wherein the black ink has a different ionicity from that of the color inks.
Claim 21
Dependent Claim
21 words
The ink-jet recording method according to claim 18 , wherein the steps (ii) and (iii) are performed in one scan operation.
Claim 22
Dependent Claim
25 words
An ink cartridge comprising a plurality of ink tanks accommodating a black ink and color inks of an ink set according to claim 1 respectively.
Claim 23
Dependent Claim
40 words
A recording unit comprising a plurality of ink tanks accommodating a black ink and color inks of an ink set according to claim 1 respectively, and a plurality of ink-jet heads discharging the black ink and the color inks respectively.
Claim 24
Dependent Claim
39 words
An ink-jet recording apparatus comprising a plurality of ink-tanks accommodating a black ink and color inks of an ink set according to claim 1 respectively, a plurality of ink-jet heads discharging the black ink and the color inks respectively.
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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) | 2007-05-11 | 2007-11-10 | 2008-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2011-05-11 | 2011-11-10 | 2012-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2015-05-11 | 2015-11-10 | 2016-05-11 | $7700.00 | Window Closed / Lapsed |