US5985015A
Expired / Lapsed
US
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Ink composition for ink jet recording and ink set
Assignee: Seiko Epson Corp
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Filing: 1997-10-24
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Granted: 1999-11-16
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Expires: 2017-10-24
Abstract
Abstract An ink composition for ink jet recording is provided which can realize a good image even on plain paper, specifically an image having high print density and no significant feather or bleeding. A carbon black having on its surface a cationic group is utilized as a colorant. Further, use of this colorant in combination with a color ink containing an anionic material, for example, an anionic dye can realize a good color image free from color-to-color bleeding.
Inventors
- 👤 Miharu Kanaya
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:30
CPC Classifications
C; C09; C09D; C09D11/00; C09D11/30; C09D11/32; C09D11/324; C09D11/40
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
25 words
An ink composition for ink jet recording, comprising a carbon black and a cationic substance, said carbon black having on its surface a cationic group.
Claim 2
Dependent Claim
25 words
An ink composition for ink jet recording, comprising a carbon black and a cationic substance, said carbon black having on its surface a cationic group.
Claim 3
Dependent Claim
39 words
The ink composition according to claim 1, wherein the cationic group comprises a quaternary ammonium (--NR 3 + ) or quaternary phosphonium group (--PR 3 + ), wherein R represents hydrogen or an alkyl, alkoxy, phenyl or naphthyl group.
Claim 4
Dependent Claim
20 words
The ink composition according to claim 1, which further comprises 3 to 30 % by weight of a polyhydric alcohol.
Claim 5
Dependent Claim
20 words
The ink composition according to claim 1, which has a pH value in the range of from 7 to 10.
Claim 6
Dependent Claim
28 words
The ink composition according to claim 1, wherein the cationic substance is a compound having in its molecule a primary, secondary, tertiary, or quaternary amine, ammonium, or phosphonium.
Claim 7
Dependent Claim
21 words
An ink set for ink jet recording, comprising a plurality of ink compositions including the ink composition according to claim 1.
Claim 8
Dependent Claim
29 words
The ink set according to claim 6, comprising at least one color ink selected from the group consisting of a yellow ink, a magenta ink, and a cyan ink.
Claim 9
Dependent Claim
15 words
The ink set according to claim 7, wherein the color ink comprises an anionic material.
Claim 10
Dependent Claim
15 words
The ink set according to claim 8, wherein the anionic material is an anionic dye.
Claim 11
Dependent Claim
17 words
The ink set according to claim 9, wherein the color ink comprises a nonionic acetylene glycol surfactant.
Claim 12
Dependent Claim
25 words
The ink set according to claim 10, wherein the nonionic acetylene glycol surfactant is contained in an amount of 0.1 to 3.0 % by weight.
Claim 13
Dependent Claim
15 words
The ink set according to claim 6, wherein the color ink comprises a glycol ether.
Claim 14
Dependent Claim
39 words
The ink set according to claim 12, wherein the glycol ether is at least one member selected from the group consisting of diethylene glycol monobutyl ether, triethylene glycol monobutyl ether, propylene glycol monobutyl ether, and dipropylene glycol monobutyl ether.
Claim 15
Dependent Claim
22 words
The ink set according to claim 12, wherein the glycol ether is contained in an amount of 3 to 30% by weight.
Claim 16
Dependent Claim
27 words
An ink jet recording method comprising the step of: ejecting and depositing droplets of the ink composition of claim 1 onto a recording medium to conduct printing.
Claim 17
Dependent Claim
13 words
A record produced by the ink jet recording method according to claim 15.
Claim 18
Dependent Claim
27 words
An ink jet recording method comprising the step of: ejecting and depositing droplets of the ink composition of claim 2 onto a recording medium to conduct printing.
Claim 19
Dependent Claim
27 words
An ink jet recording method comprising the step of: ejecting and depositing droplets of the ink composition of claim 3 onto a recording medium to conduct printing.
Claim 20
Dependent Claim
27 words
An ink jet recording method comprising the step of: ejecting and depositing droplets of the ink composition of claim 4 onto a recording medium to conduct printing.
Claim 21
Dependent Claim
35 words
An ink jet recording method comprising the step of: ejecting and depositing droplets of each of the plurality of ink compositions of the ink set of claim 7 onto a recording medium to conduct printing.
Claim 22
Dependent Claim
27 words
An ink jet recording method comprising the step of: ejecting and depositing droplets of the ink composition of claim 5 onto a recording medium to conduct printing.
Claim 23
Dependent Claim
82 words
In an ink jet recording method comprising ejecting and depositing a droplet of a black ink composition onto a recording medium adjacent to a droplet of a color ink composition, the improvement wherein the black ink composition is the ink composition of claim 1, said carbon black being present in the ink composition in an amount of about 1 to 15% by weight, said cationic substance being present in the ink composition in an amount of about 0.5 to 10% by weight.
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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) | 2002-11-15 | 2003-05-17 | 2003-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-11-15 | 2007-05-17 | 2007-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-11-15 | 2011-05-17 | 2011-11-16 | $7700.00 | Window Closed / Lapsed |