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US5700314A
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Image forming method, and ink set and ink-jet machinery used therein
Assignee: Canon Inc
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Filing: 1995-03-28
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Granted: 1997-12-23
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Expires: 2015-03-28
Abstract
Abstract An ink set comprising a combination of a liquid composition containing a cationic substance, with a yellow ink, a cyan ink and magenta ink, wherein said three inks each contain a water soluble anionic dye and are capable of affording a chromaticity CIE L*a*b* to a black image presented on a recording medium by using these inks in combination within the range of the numerical expressions:10</=L*</=30,0</=a*</=7,and-10</=b*</=0.
Inventors
- 👤 Yutaka Kurbayashi
- 👤 Katsuhiro Shirota
- 👤 Katsuhiko Takahashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:00
CPC Classifications
C; C09; C09D; C09D11/00; C09D11/30; C09D11/40; B; B41; B41J; B41J2/00; B41J2/005; B41J2/01
Claims Analysis
Total Claims: 33
Claim 1
Independent Claim
80 words
An ink set comprising a combination of a liquid composition comprising a low-molecular weight cationic substance and a high-molecular weight cationic substance in combination, with a yellow ink, a cyan ink and a magenta ink, wherein said three inks each contain a water-soluble anionic dye and are capable of affording a chromaticity CIE L*a*b* to a black image presented on a recording medium by using these inks in combination within the range of the numerical expressions: 10≦L*≦30, 0≦a*≦7, and -10≦b*≦0.
Claim 2
Dependent Claim
80 words
An ink set comprising a combination of a liquid composition comprising a low-molecular weight cationic substance and a high-molecular weight cationic substance in combination, with a yellow ink, a cyan ink and a magenta ink, wherein said three inks each contain a water-soluble anionic dye and are capable of affording a chromaticity CIE L*a*b* to a black image presented on a recording medium by using these inks in combination within the range of the numerical expressions: 10≦L*≦30, 0≦a*≦7, and -10≦b*≦0.
Claim 3
Dependent Claim
25 words
The ink set according to claim 1, wherein said anionic dye is any one of an acid dye, a direct dye and a reactive dye.
Claim 4
Dependent Claim
38 words
The ink set according to claim 1, wherein said anionic dye is contained in each of said inks in an amount of from 0.1% by weight to 15% by weight based on the total weight of the ink.
Claim 5
Dependent Claim
37 words
The ink set according to claim 1, wherein said liquid composition comprises a cationic substance with a molecular weight of 1,000 or less and a cationic substance with a molecular weight of 1,500 or more in combination.
Claim 6
Dependent Claim
22 words
The ink set according to claim 1, wherein said low-molecular weight cationic substance has a molecular weight ranging from 100 to 700.
Claim 7
Dependent Claim
22 words
The ink set according to claim 1, wherein said high-molecular weight cationic substance has a molecular weight ranging from 1,500 to 10,000.
Claim 8
Dependent Claim
19 words
The ink set according to claim 1, wherein said each ink further contains water and a water-soluble organic solvent.
Claim 9
Dependent Claim
19 words
The ink set according to claim 1, wherein said liquid composition further contains water and a water-soluble organic solvent.
Claim 10
Dependent Claim
33 words
The ink set according to claim 1, wherein said each ink contains water in an amount ranging from 10% by weight to 97.5% by weight based on the total weight of the ink.
Claim 11
Dependent Claim
36 words
The ink set according to claim 1, wherein said each ink contains a water-soluble organic solvent in an amount ranging from 2% by weight to 80% by weight based on the total weight of the ink.
Claim 12
Dependent Claim
27 words
The ink set according to claim 1, wherein said each ink has a viscosity at 25° C. in the range of from 1 cP to 20 cP.
Claim 13
Dependent Claim
20 words
The ink set according to claim 1, wherein said each ink has a surface tension of 30 dyne/cm or above.
Claim 14
Dependent Claim
20 words
The ink set according to claim 1, wherein said each ink has a pH value ranging from 6 to 10.
Claim 15
Dependent Claim
31 words
The ink set according to claim 1, wherein said yellow ink or cyan ink comprises further an anionic surface active agent or an anionic high-molecular weight substance other than the dye.
Claim 16
Dependent Claim
88 words
The ink set according to claim 1, wherein said magenta ink contains a dye represented by the formula: ##STR3## wherein R 1 and R 2 each represent H, CH 3 , OCH 3 , --SO 3 M or --COOM, and R 3 is --COCH 3 , ##STR4## wherein R 4 and R 5 each represent --COOM, R 6 or --OR 6 , where R 6 represents a C 2 to C 6 alkyl chain which may be branched; and M represents sodium, lithium, an organic amine or ammonium.
Claim 17
Dependent Claim
85 words
An image forming method comprising forming a black portion by using a liquid composition comprising a low-molecular weight cationic substance and a high-molecular weight cationic substance, in combination with a yellow ink, a cyan ink and a magenta ink, wherein said three inks each contain a water-soluble anionic dye and are capable of affording a chromaticity CIE L*a*b* to a black image presented on a recording medium by using these inks in combination within the range of the numerical expressions: 10≦L*≦30, 0≦a*≦7, and -10≦b*≦0. 17.
Claim 18
Dependent Claim
85 words
An image forming method comprising forming a black portion by using a liquid composition comprising a low-molecular weight cationic substance and a high-molecular weight cationic substance, in combination with a yellow ink, a cyan ink and a magenta ink, wherein said three inks each contain a water-soluble anionic dye and are capable of affording a chromaticity CIE L*a*b* to a black image presented on a recording medium by using these inks in combination within the range of the numerical expressions: 10≦L*≦30, 0≦a*≦7, and -10≦b*≦0. 17.
Claim 19
Dependent Claim
41 words
An image forming method comprising imparting a liquid composition, a yellow ink, a cyan ink and a magenta ink by an ink-jet system to record a black portion, wherein the ink set according to any one of claims 1-15 is applied.
Claim 20
Dependent Claim
26 words
The image method according to claim 17, wherein said ink-jet system is a system comprising applying a heat energy to the ink to generate ink droplets.
Claim 21
Dependent Claim
38 words
The image forming method according to claim 17, wherein said yellow ink and cyan ink are each imparted to the recording medium in a quantity larger by 10% to 50% with respect to that of said magenta ink.
Claim 22
Dependent Claim
37 words
The image forming method according to claim 17, wherein the ink shot duty of said magenta ink is controlled within the range of from 50% to 80% of that of said yellow ink and cyan ink each.
Claim 23
Dependent Claim
41 words
A recording unit comprising holders for a liquid composition and an ink and a head that ejects the liquid composition and the ink in the form of droplets, wherein the ink set according to any one of claims 1-15 is applied.
Claim 24
Dependent Claim
26 words
The recording unit according to claim 21, wherein an ink-jet system that generates ink droplets by the action of heat energy is applied to said head.
Claim 25
Dependent Claim
25 words
An ink cartridge comprising holders for a liquid composition and an ink, wherein the ink set according to any one of claims 1-15 is applied.
Claim 26
Dependent Claim
12 words
An ink-jet recording apparatus comprising the recording unit according to claim 21.
Claim 27
Dependent Claim
12 words
An ink-jet recording apparatus comprising the recording unit according to claim 22.
Claim 28
Dependent Claim
12 words
An ink-jet recording apparatus comprising the ink cartridge according to claim 23.
Claim 29
Dependent Claim
19 words
The ink-jet recording apparatus according to claim 23, having a head for generating ink droplets by an ink-jet system.
Claim 30
Dependent Claim
15 words
An ink-jet recording apparatus comprising the ink set according to any one of claims 1-15.
Claim 31
Dependent Claim
20 words
The ink-jet recording apparatus according to claim 28, further having a head for generating ink droplets by an ink-jet system.
Claim 32
Dependent Claim
60 words
An image which is presented using a liquid composition comprising a low-molecular weight cationic substance and a high-molecular weight cationic substance, in combination with a yellow ink, a cyan ink and a magenta ink, and contains a black portion having on a recording medium a chromaticity CIE L*a*b* within the range of the following numerical expressions: 10≦L*≦30, 0≦a*≦7, and -10≦b*≦0.
Claim 33
Dependent Claim
60 words
An image which is presented using a liquid composition comprising a low-molecular weight cationic substance and a high-molecular weight cationic substance, in combination with a yellow ink, a cyan ink and a magenta ink, and contains a black portion having on a recording medium a chromaticity CIE L*a*b* within the range of the following numerical expressions: 10≦L*≦30, 0≦a*≦7, and -10≦b*≦0.
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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) | 2000-12-22 | 2001-06-23 | 2001-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-12-22 | 2005-06-23 | 2005-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-12-22 | 2009-06-23 | 2009-12-23 | $7700.00 | Window Closed / Lapsed |