EP0879857A2
Expired / Lapsed
EP
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Ink set, and recording method and recording instrument using the same
Assignee: Canon Inc
•
Filing: 1998-05-22
•
Granted: —
•
Expires: 2018-05-22
Abstract
Abstract Disclosed herein is an ink set comprising two black inks the coloring materials for which are both pigments, wherein one black ink is cationic, and the other black ink is anionic.
Inventors
- 👤 Yoshihisa Takizawa
- 👤 Hisashi Teraoka
- 👤 Koichi Osumi
- 👤 Yoichi Takada
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-26 10:05
CPC Classifications
C; C09; C09D; C09D11/00; C09D11/30; C09D11/40; B; B41; B41J; B41J2/00; B41J2/005; B41J2/01
Claims Analysis
Total Claims: 79
Claim 1
Independent Claim
15 words
An ink set comprising two black inks different in
polarity each other as black inks.
Claim 2
Dependent Claim
31 words
The ink set according to Claim 1, wherein one of
said two black inks different in polarity each other is a
pigment ink, and the other is also a pigment ink.
Claim 3
Dependent Claim
37 words
An ink set comprising two black inks the coloring
materials for which are different in polarity each other,
wherein one of said two black inks is a pigment ink, and
the other is also a pigment ink.
Claim 4
Dependent Claim
28 words
An ink set comprising two black inks the coloring
materials for which are both pigments, wherein one black
ink is cationic, and the other black ink is anionic.
Claim 5
Dependent Claim
54 words
The ink set according to Claim 4, wherein the
cationic ink is a pigment ink in which a pigment is
dispersed with a cationic polymer or surfactant, or a self-dispersing
type pigment ink in which a hydrophilic group is
bonded to the surface of a pigment through an atomic group
having a cationic group.
Claim 6
Dependent Claim
54 words
The ink set according to Claim 4, wherein the
anionic ink is a pigment ink in which a pigment is
dispersed with an anionic polymer or surfactant, or a self-dispersing
type pigment ink in which a hydrophilic group is
bonded to the surface of a pigment through an atomic group
having an anionic group.
Claim 7
Dependent Claim
73 words
The ink set according to Claim 4, wherein one
black ink of said two black inks the coloring materials for
which are both pigments is a self-dispersing type cationic
pigment ink in which a hydrophilic group having a cationic
group is directly bonded to carbon black, and the other
black ink is a self-dispersing type anionic pigment ink in
which a hydrophilic group having a anionic group is
directly bonded to carbon black.
Claim 8
Dependent Claim
32 words
The ink set according to Claim 7, wherein the
hydrophilic group in the cationic pigment ink is composed
of at least one aromatic or heterocyclic group and at least
one cationic group.
Claim 9
Dependent Claim
18 words
The ink set according to Claim 7 or 8, wherein
the cationic group is a quaternary ammonium group.
Claim 10
Dependent Claim
17 words
The ink set according to Claim 7, wherein the
anionic group is a sulfonic or carboxyl group.
Claim 11
Dependent Claim
43 words
The ink set according to any one of Claims 1 to
10, wherein one black ink of the two black inks has a
surface tension of at least 40 dyn/cm, and the other black
ink has a surface tension lower than 40 dyn/cm.
Claim 12
Dependent Claim
29 words
The ink set according to any one of Claims 1 to
11, wherein the concentrations of the coloring materials
used for the two black inks differ from each other.
Claim 13
Dependent Claim
30 words
An ink set comprising two black inks different in
polarity each other, wherein one of said two black inks is
a pigment ink, and the other is a dye ink.
Claim 14
Dependent Claim
36 words
An ink set comprising two black inks the coloring
materials for which are different in polarity each other,
wherein one of said two black inks is a pigment ink, and
the other is a dye ink.
Claim 15
Dependent Claim
38 words
An ink set comprising two black inks the coloring
materials for which are a pigment for one ink and a dye for
the other ink, wherein one black ink is cationic, and the
other black ink is anionic.
Claim 16
Dependent Claim
54 words
The ink set according to Claim 15, wherein the
cationic ink is a pigment ink in which a pigment is
dispersed with a cationic polymer or surfactant, or a self-dispersing
type pigment ink in which a hydrophilic group is
bonded to the surface of a pigment through an atomic group
having a cationic group.
Claim 17
Dependent Claim
16 words
The ink set according to Claim 15, wherein the
cationic ink is a cationic dye ink.
Claim 18
Dependent Claim
54 words
The ink set according to Claim 15, wherein the
anionic ink is a pigment ink in which a pigment is
dispersed with an anionic polymer or surfactant, or a self-dispersing
type pigment ink in which a hydrophilic group is
bonded to the surface of a pigment through an atomic group
having an anionic group.
Claim 19
Dependent Claim
16 words
The ink set according to Claim 15, wherein the
anionic ink is an anionic dye ink.
Claim 20
Dependent Claim
66 words
The ink set according to Claim 15, wherein one
black ink of said two black inks the coloring materials for
which are a pigment for one ink and a dye for the other ink
is a self-dispersing type cationic pigment ink in which a
hydrophilic group having a cationic group is directly
bonded to carbon black, and the other black ink is an
anionic dye ink.
Claim 21
Dependent Claim
32 words
The ink set according to Claim 20, wherein the
hydrophilic group in the cationic pigment ink is composed
of at least one aromatic or heterocyclic group and at least
one cationic group.
Claim 22
Dependent Claim
16 words
The ink set according to Claim 21, wherein the
cationic group is a quaternary ammonium group.
Claim 23
Dependent Claim
16 words
The ink set according to Claim 20, wherein the
cationic pigment ink comprises a cationic polymer.
Claim 24
Dependent Claim
16 words
The ink set according to Claim 20, wherein the
anionic dye ink comprises an anionic polymer.
Claim 25
Dependent Claim
66 words
The ink set according to Claim 15, wherein one
black ink of said two black inks the coloring materials for
which are a pigment for one ink and a dye for the other ink
is a cationic dye ink, and the other black ink is a self-dispersing
type anionic pigment ink in which a hydrophilic
group having an anionic group is directly bonded to carbon
black.
Claim 26
Dependent Claim
17 words
The ink set according to Claim 25, wherein the
anionic group is a sulfonic or carboxylic group.
Claim 27
Dependent Claim
16 words
The ink set according to Claim 25, wherein the
anionic pigment ink comprises an anionic polymer.
Claim 28
Dependent Claim
16 words
The ink set according to Claim 25, wherein the
cationic dye ink comprises a cationic polymer.
Claim 29
Dependent Claim
43 words
The ink set according to any one of Claims 13 to
28, wherein one black ink of the two black inks has a
surface tension of at least 40 dyn/cm, and the other black
ink has a surface tension lower than 40 dyn/cm.
Claim 30
Dependent Claim
29 words
The ink set according to any one of Claims 13 to
29, wherein the concentrations of the coloring materials
used for the two black inks differ from each other.
Claim 31
Dependent Claim
19 words
An ink set comprising two black inks different in
polarity each other as black inks and additional color
inks.
Claim 32
Dependent Claim
31 words
The ink set according to Claim 31, wherein one of
said two black inks different in polarity each other is a
pigment ink, and the other is also a pigment ink.
Claim 33
Dependent Claim
37 words
The ink set according to Claim 31, wherein one of
said two black inks the coloring materials for which are
different in polarity each other is a pigment ink, and the
other is also a pigment ink.
Claim 34
Dependent Claim
31 words
The ink set according to Claim 31, wherein
coloring materials used for said two black inks are both
pigments, one black ink is cationic, and the other black
ink is anionic.
Claim 35
Dependent Claim
54 words
The ink set according to Claim 34, wherein the
cationic ink is a pigment ink in which a pigment is
dispersed with a cationic polymer or surfactant, or a self-dispersing
type pigment ink in which a hydrophilic group is
bonded to the surface of a pigment through an atomic group
having a cationic group.
Claim 36
Dependent Claim
54 words
The ink set according to Claim 34, wherein the
anionic ink is a pigment ink in which a pigment is
dispersed with an anionic polymer or surfactant, or a self-dispersing
type pigment ink in which a hydrophilic group is
bonded to the surface of a pigment through an atomic group
having an anionic group.
Claim 37
Dependent Claim
73 words
The ink set according to Claim 31, wherein one
black ink of said two black inks the coloring materials for
which are both pigments is a self-dispersing type cationic
pigment ink in which a hydrophilic group having a cationic
group is directly bonded to carbon black, and the other
black ink is a self-dispersing type anionic pigment ink in
which a hydrophilic group having an anionic group is
directly bonded to carbon black.
Claim 38
Dependent Claim
32 words
The ink set according to Claim 37, wherein the
hydrophilic group in the cationic pigment ink is composed
of at least one aromatic or heterocyclic group and at least
one cationic group.
Claim 39
Dependent Claim
18 words
The ink set according to Claim 37 or 38, wherein
the cationic group is a quaternary ammonium group.
Claim 40
Dependent Claim
17 words
The ink set according to Claim 37, wherein the
anionic group is a sulfonic or carboxylic group.
Claim 41
Dependent Claim
43 words
The ink set according to any one of Claims 31 to
40, wherein one black ink of the two black inks has a
surface tension of at least 40 dyn/cm, and the other black
ink has a surface tension lower than 40 dyn/cm.
Claim 42
Dependent Claim
30 words
The ink set according to Claim 31, wherein one of
said two black inks different in polarity each other is a
pigment ink, and the other is a dye ink.
Claim 43
Dependent Claim
43 words
The ink set according to Claim 31, wherein one of
said two black inks the coloring materials for which are
different in polarity each other, wherein one of said two
black inks is a pigment ink, and the other is a dye ink.
Claim 44
Dependent Claim
41 words
The ink set according to Claim 31, wherein
coloring materials used for said two black inks are a
pigment for one ink and a dye for the other ink, one black
ink is cationic, and the other black ink is anionic.
Claim 45
Dependent Claim
54 words
The ink set according to Claim 44, wherein the
cationic ink is a pigment ink in which a pigment is
dispersed with a cationic polymer or surfactant, or a self-dispersing
type pigment ink in which a hydrophilic group is
bonded to the surface of a pigment through an atomic group
having a cationic group.
Claim 46
Dependent Claim
16 words
The ink set according to Claim 44, wherein the
cationic ink is a cationic dye ink.
Claim 47
Dependent Claim
54 words
The ink set according to Claim 44, wherein the
anionic ink is a pigment ink in which a pigment is
dispersed with an anionic polymer or surfactant, or a self-dispersing
type pigment ink in which a hydrophilic group is
bonded to the surface of a pigment through an atomic group
having an anionic group.
Claim 48
Dependent Claim
16 words
The ink set according to Claim 44, wherein the
anionic ink is an anionic dye ink.
Claim 49
Dependent Claim
64 words
The ink set according to Claim 31, wherein
coloring materials used for said two black inks are a
pigment for one ink and a dye for the other ink, one black
ink is a self-dispersing type cationic pigment ink in which
a hydrophilic group having a cationic group is directly
bonded to carbon black, and the other black ink is an
anionic dye ink.
Claim 50
Dependent Claim
32 words
The ink set according to Claim 49, wherein the
hydrophilic group in the cationic pigment ink is composed
of at least one aromatic or heterocyclic group and at least
one cationic group.
Claim 51
Dependent Claim
16 words
The ink set according to Claim 50, wherein the
cationic group is a quaternary ammonium group.
Claim 52
Dependent Claim
16 words
The ink set according to Claim 49, wherein the
cationic pigment ink comprises a cationic polymer.
Claim 53
Dependent Claim
16 words
The ink set according to Claim 49, wherein the
anionic dye ink comprises an anionic polymer.
Claim 54
Dependent Claim
64 words
The ink set according to Claim 31, wherein
coloring materials used for said two black inks are a
pigment for one ink and a dye for the other ink, one black
ink is a cationic dye ink, and the other black ink is a
self-dispersing type anionic pigment ink in which a
hydrophilic group having an anionic group is directly
bonded to carbon black.
Claim 55
Dependent Claim
17 words
The ink set according to Claim 54, wherein the
anionic group is a sulfonic or carboxylic group.
Claim 56
Dependent Claim
16 words
The ink set according to Claim 54, wherein the
anionic pigment ink comprises an anionic polymer.
Claim 57
Dependent Claim
16 words
The ink set according to Claim 54, wherein the
cationic dye ink comprises a cationic polymer.
Claim 58
Dependent Claim
43 words
The ink set according to any one of Claims 42 to
57, wherein one black ink of the two black inks has a
surface tension of at least 40 dyn/cm, and the other black
ink has a surface tension lower than 40 dyn/cm.
Claim 59
Dependent Claim
17 words
The ink set according to Claim 31, wherein
coloring materials used for the color inks are dyes.
Claim 60
Dependent Claim
19 words
The ink set according to Claim 31, wherein the
color inks are at least yellow, magenta and cyan inks.
Claim 61
Dependent Claim
19 words
The ink set according to Claim 31, wherein the
color inks have a surface tension lower than 40 dyn/cm.
Claim 62
Dependent Claim
40 words
An ink-jet recording method comprising ejecting
ink droplets from orifices in response to recording signals
to conduct recording on a recording medium, wherein two
black inks different in polarity each other are used as
black inks to conduct the recording.
Claim 63
Dependent Claim
45 words
An ink-jet recording method comprising ejecting
ink droplets from orifices in response to recording signals
to conduct recording of a black color on a recording
medium, wherein two black inks different in polarity each
other are used as black inks to conduct the black-color
recording.
Claim 64
Dependent Claim
28 words
The recording method according to Claim 62 or 63,
wherein the ink set according to any one of Claims 1 to 30
is used as the black inks.
Claim 65
Dependent Claim
48 words
An ink-jet recording method comprising ejecting
ink droplets from orifices in response to recording signals
to conduct recording of at least two colors on a recording
medium, wherein two black inks different in polarity each
other as black inks, and color inks are used to conduct the
recording.
Claim 66
Dependent Claim
26 words
The recording method according to Claim 65,
wherein the ink set according to any one of Claims 1 to 30
is used as the black inks.
Claim 67
Dependent Claim
26 words
The recording method according to Claim 65,
wherein the ink set according to any one of Claims 59 to 61
is used as the color inks.
Claim 68
Dependent Claim
22 words
The recording method according to Claim 63 or 65,
wherein the ink droplets are ejected by applying thermal
energy to the inks.
Claim 69
Dependent Claim
46 words
A recording unit comprising an ink container
portion with an ink held therein and a head from which the
ink is ejected in the form of ink droplets, wherein the ink
is one in the ink set according to any one of claims 1 to
61.
Claim 70
Dependent Claim
30 words
The recording unit according to Claim 69, wherein
the head is a head of the type that thermal energy is
applied to an ink to eject droplets of the ink.
Claim 71
Dependent Claim
22 words
The recording unit according to Claim 69, wherein
the ink container portion is formed of polyurethane,
cellulose, polyvinyl acetate or polyolefin resin.
Claim 72
Dependent Claim
31 words
An ink cartridge comprising an ink container
portion with an ink held therein, wherein the ink is one in
the ink set according to any one of claims 1 to 61.
Claim 73
Dependent Claim
27 words
The ink cartridge according to Claim 72, wherein
the ink container portion is formed of a polyolefin at its
surface with which the ink comes into contact.
Claim 74
Dependent Claim
51 words
An ink-jet recording apparatus comprising a
recording unit having an ink container portion with an ink
held therein and a head from which the ink is ejected in
the form of ink droplets, wherein the ink is one in the ink
set according to any one of claims 1 to 61.
Claim 75
Dependent Claim
31 words
The ink-jet recording apparatus according to
Claim 74, wherein the head is a head of the type that
thermal energy is applied to an ink to eject droplets of
the ink.
Claim 76
Dependent Claim
23 words
The ink-jet recording apparatus according to
Claim 74, wherein the ink container portion is formed of
polyurethane, cellulose, polyvinyl acetate or polyolefin
resin.
Claim 77
Dependent Claim
68 words
An ink-jet recording apparatus comprising a
recording head from which an ink is ejected in the form of
ink droplets, an ink cartridge having an ink container
portion with the ink held therein, and an ink feeder for
feeding the ink contained in the ink cartridge to the
recording head, wherein the ink is one in the ink set
according to any one of claims 1 to 61.
Claim 78
Dependent Claim
33 words
The ink-jet recording apparatus according to
Claim 77, wherein the e recording head is a head of the
type that thermal energy is applied to an ink to eject
droplets of the ink.
Claim 79
Dependent Claim
28 words
The ink-jet recording apparatus according to
Claim 77, wherein the ink container portion is formed of a
polyolefin at its surface with which the ink comes into
contact.
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