US6007182A — Ink-jet recording method employing inks of differ…

Claim 1

Independent Claim 93 words

A color image forming method for forming a color image on a recording medium, comprising the steps of: forming an image with a black liquid having a diffusibility greater than a diffusibility of a color liquid with respect to the recording medium, wherein said color liquid is different in color from said black liquid; and forming an image with said color liquid with a penetrability greater than the penetrability of said black liquid with respect to the recording medium, wherein said black liquid contains urea, and said color liquid contains acetylene glycol-EO adduct.

Claim 2

Dependent Claim 93 words

A color image forming method for forming a color image on a recording medium, comprising the steps of: forming an image with a black liquid having a diffusibility greater than a diffusibility of a color liquid with respect to the recording medium, wherein said color liquid is different in color from said black liquid; and forming an image with said color liquid with a penetrability greater than the penetrability of said black liquid with respect to the recording medium, wherein said black liquid contains urea, and said color liquid contains acetylene glycol-EO adduct.

Claim 3

Dependent Claim 24 words

A color image forming method according to claim 1, wherein said acetylene glycol-EO adduct constitutes at least 3% by weight of said color liquid.

Claim 4

Dependent Claim 74 words

A color image forming method for forming a color image on a recording medium, comprising the steps of: forming an image with a black liquid having a surface tension that is greater than a surface tension of a color liquid, wherein said color liquid is different in color from said black liquid; and forming an image with said color liquid, wherein said black liquid contains urea, and said color liquid contains acetylene glycol-EO adduct.

Claim 5

Dependent Claim 74 words

A color image forming method for forming a color image on a recording medium, comprising the steps of: forming an image with a black liquid having a surface tension that is greater than a surface tension of a color liquid, wherein said color liquid is different in color from said black liquid; and forming an image with said color liquid, wherein said black liquid contains urea, and said color liquid contains acetylene glycol-EO adduct.

Claim 6

Dependent Claim 123 words

A color image forming method for forming a color image on a recording medium, comprising the steps of: forming a first image by depositing on said recording medium a black liquid having a surface tension that is greater than a surface tension of plural color liquids, wherein said plural color liquids are different in color from said black liquid; and forming a second image by depositing on said recording medium said plural color liquids, said second image having a boundary with said first image, wherein an image of a predetermined width of pixels of a black image adjacent to the boundary between the first image and the second image is formed by pixels of the black liquid and pixels of plural color liquids.

Claim 7

Dependent Claim 123 words

A color image forming method for forming a color image on a recording medium, comprising the steps of: forming a first image by depositing on said recording medium a black liquid having a surface tension that is greater than a surface tension of plural color liquids, wherein said plural color liquids are different in color from said black liquid; and forming a second image by depositing on said recording medium said plural color liquids, said second image having a boundary with said first image, wherein an image of a predetermined width of pixels of a black image adjacent to the boundary between the first image and the second image is formed by pixels of the black liquid and pixels of plural color liquids.

Claim 8

Dependent Claim 26 words

A color image forming method according to claim 4, wherein the image of said black image adjacent to the boundary is formed including said black liquid.

Claim 9

Dependent Claim 194 words

A color image recording apparatus comprising: liquid jet recording means for discharging a black liquid and color liquids of plural colors, wherein said color liquids are different in color from said black liquid, onto a recording medium; and means for supplying said recording means with recording signals; wherein said recording signal supplying means supplies said recording means with a signal for causing discharge of said black liquid alone in a character area of black color only, wherein said black liquid has a diffusibility that is greater than a diffusibility of said color liquids which are different in color from said black liquid with respect to the recording medium, a signal for causing discharge of one of said color liquids, which has a penetrability that is greater than a penetrability of said black liquid with respect to the recording medium, in an independent color area different in color from said black liquid, a signal for causing discharge of said color liquids, in a black color area at a boundary between said black liquid and said color liquid, and a signal for causing discharge of said black liquid in said black color area at the boundary.

Claim 10

Dependent Claim 194 words

A color image recording apparatus comprising: liquid jet recording means for discharging a black liquid and color liquids of plural colors, wherein said color liquids are different in color from said black liquid, onto a recording medium; and means for supplying said recording means with recording signals; wherein said recording signal supplying means supplies said recording means with a signal for causing discharge of said black liquid alone in a character area of black color only, wherein said black liquid has a diffusibility that is greater than a diffusibility of said color liquids which are different in color from said black liquid with respect to the recording medium, a signal for causing discharge of one of said color liquids, which has a penetrability that is greater than a penetrability of said black liquid with respect to the recording medium, in an independent color area different in color from said black liquid, a signal for causing discharge of said color liquids, in a black color area at a boundary between said black liquid and said color liquid, and a signal for causing discharge of said black liquid in said black color area at the boundary.

Claim 11

Dependent Claim 167 words

A color image recording apparatus comprising: liquid jet recording means for discharging liquids of different colors onto a recording medium; and means for supplying said recording means with recording signals; wherein said recording signal supplying means supplies said recording means with a signal for causing discharge of a black liquid which has a surface tension and a diffusibility that are greater than a surface tension and a diffusibility of a color liquid, wherein said color liquid is different in color from said black liquid, alone in a character area of black color only; a signal for causing discharge of said color liquid having greater penetrability than a penetrability of said black liquid with respect to the recording medium, in an independent color area which is different in color from said black liquid; and a signal for causing discharge of plural color liquids which are different in color from said black liquid, in a black color area at a boundary between said black liquid and said color liquid.

Claim 12

Dependent Claim 167 words

A color image recording apparatus comprising: liquid jet recording means for discharging liquids of different colors onto a recording medium; and means for supplying said recording means with recording signals; wherein said recording signal supplying means supplies said recording means with a signal for causing discharge of a black liquid which has a surface tension and a diffusibility that are greater than a surface tension and a diffusibility of a color liquid, wherein said color liquid is different in color from said black liquid, alone in a character area of black color only; a signal for causing discharge of said color liquid having greater penetrability than a penetrability of said black liquid with respect to the recording medium, in an independent color area which is different in color from said black liquid; and a signal for causing discharge of plural color liquids which are different in color from said black liquid, in a black color area at a boundary between said black liquid and said color liquid.

Claim 13

Dependent Claim 35 words

A recording apparatus according to claim 7, wherein said recording signal supplying means supplies said recording means with a signal for causing discharge of said black liquid in said black color area at the boundary.

Claim 14

Dependent Claim 147 words

A color image forming method for forming a color image on a recording medium, comprising the steps of: forming an image with a first color liquid which has a penetration time, from deposition onto the recording medium to an abrupt change in amount of surface reflected light, on an order of 100 msec; forming an image with a second color liquid which has a luminosity lower than a luminosity of said first color liquid and which has a penetration time on the order of a second, and said first color liquid has cyan, magenta or yellow color, and said second color liquid has black color; and forming a deposition area by depositing on the recording medium only the color liquid, which is different in color from the black liquid, in at least a part of a boundary of the deposition area formed with said black liquid only.

Claim 15

Dependent Claim 147 words

A color image forming method for forming a color image on a recording medium, comprising the steps of: forming an image with a first color liquid which has a penetration time, from deposition onto the recording medium to an abrupt change in amount of surface reflected light, on an order of 100 msec; forming an image with a second color liquid which has a luminosity lower than a luminosity of said first color liquid and which has a penetration time on the order of a second, and said first color liquid has cyan, magenta or yellow color, and said second color liquid has black color; and forming a deposition area by depositing on the recording medium only the color liquid, which is different in color from the black liquid, in at least a part of a boundary of the deposition area formed with said black liquid only.

Claim 16

Dependent Claim 99 words

A color image forming method for forming a color image on a recording medium, comprising the steps of: depositing only a black liquid on said recording medium to cover a portion of the recording medium with said black liquid and thereby form a first deposition area having a boundary; and depositing on said recording medium a color liquid which is different in color from said black liquid, to cover a portion of the recording medium with said color liquid and thereby form a second deposition area in at least a part of said boundary of said first deposition area.

Claim 17

Dependent Claim 99 words

A color image forming method for forming a color image on a recording medium, comprising the steps of: depositing only a black liquid on said recording medium to cover a portion of the recording medium with said black liquid and thereby form a first deposition area having a boundary; and depositing on said recording medium a color liquid which is different in color from said black liquid, to cover a portion of the recording medium with said color liquid and thereby form a second deposition area in at least a part of said boundary of said first deposition area.

Claim 18

Dependent Claim 192 words

A color image recording apparatus comprising: ink jet recording means provided with plural adjacent color ink discharge units arranged at a predetermined pitch in a scanning direction, wherein the adjacent discharge units have a recording interval on an order of 10 msec; and means for forming deposition areas, having boundaries, said deposition areas being portions of the recording medium which are covered by a color liquid, by depositing on a recording medium droplets of a first color liquid which has cyan, magenta or yellow color, and which has a penetration time from deposition onto the recording medium to an abrupt change in amount of surface reflected light on an order of 100 msec and droplets of a second color liquid which is a black liquid and has a luminosity lower than a luminosity of said first color liquid and which has a penetration time on the order of a second, and forming a deposition area by depositing on the recording medium only the color liquid, which is different in color from the black liquid, in at least a part of the boundary of the deposition area formed with said black liquid only.

Claim 19

Dependent Claim 192 words

A color image recording apparatus comprising: ink jet recording means provided with plural adjacent color ink discharge units arranged at a predetermined pitch in a scanning direction, wherein the adjacent discharge units have a recording interval on an order of 10 msec; and means for forming deposition areas, having boundaries, said deposition areas being portions of the recording medium which are covered by a color liquid, by depositing on a recording medium droplets of a first color liquid which has cyan, magenta or yellow color, and which has a penetration time from deposition onto the recording medium to an abrupt change in amount of surface reflected light on an order of 100 msec and droplets of a second color liquid which is a black liquid and has a luminosity lower than a luminosity of said first color liquid and which has a penetration time on the order of a second, and forming a deposition area by depositing on the recording medium only the color liquid, which is different in color from the black liquid, in at least a part of the boundary of the deposition area formed with said black liquid only.

Claim 20

Dependent Claim 172 words

A color ink jet recording method forming a color image on a recording medium, using a black ink and color inks of plural colors different from said black ink, comprising the steps of: discriminating whether a color image is present adjacent to a black image having a periphery; determining whether said black image is formed with said black ink or with said color inks of plural colors based on said discrimination; forming said black image according to said determination; and forming a black image of a predetermined width of pixels adjacent to a boundary between the black image and the color image, by pixels of said black ink and pixels of one or more of said color inks; wherein, when an image of a predetermined width of pixels of the black image adjacent to the boundary between the black image and the color image is to be formed by pixels of color inks, the image is formed by dots of predetermined one of the colors and dots of at least two colors.

Claim 21

Dependent Claim 172 words

A color ink jet recording method forming a color image on a recording medium, using a black ink and color inks of plural colors different from said black ink, comprising the steps of: discriminating whether a color image is present adjacent to a black image having a periphery; determining whether said black image is formed with said black ink or with said color inks of plural colors based on said discrimination; forming said black image according to said determination; and forming a black image of a predetermined width of pixels adjacent to a boundary between the black image and the color image, by pixels of said black ink and pixels of one or more of said color inks; wherein, when an image of a predetermined width of pixels of the black image adjacent to the boundary between the black image and the color image is to be formed by pixels of color inks, the image is formed by dots of predetermined one of the colors and dots of at least two colors.

Claim 22

Dependent Claim 65 words

A color ink jet recording method according to claim 12, wherein said black image is formed with said black ink when the periphery of said black image is not adjacent to said color image, but said black image is formed with said color inks of plural colors when at least a part of the periphery of said black image is adjacent to said color image.

Claim 23

Dependent Claim 76 words

A color ink jet recording method according to claim 12, wherein said black image is formed with said black ink when a periphery of said black image is not adjacent to said color image or when at least a part of said periphery is adjacent to said color image, but said black image is formed with said color inks of plural colors when an entire periphery of said black image is adjacent to said color image.

Claim 24

Dependent Claim 57 words

A color ink jet recording method according to claim 12, wherein a part of said black image is formed with the black ink and another part of said black image is formed with said color inks of plural colors when at least a part of the periphery of said black image is adjacent to said color image.

Claim 25

Dependent Claim 24 words

A color ink jet recording method according to claim 12, wherein said color inks of plural colors are of yellow, magenta and cyan colors.

Claim 26

Dependent Claim 178 words

A color ink jet recording apparatus comprising: a black ink recording head for discharging black ink; plural color ink recording heads, for discharging color inks of plural colors, each different in color from said black ink; means for supplying said black ink recording head and said color ink recording heads with recording signals; and discrimination means for discriminating whether a black image is adjacent to a color image; wherein said supply means determines, for said black image, whether to supply a recording signal for discharging the black ink to said black ink recording head, or to supply recording signals for discharging the color inks to said color ink recording heads, based on discrimination by said discrimination means; and wherein there is a boundary between the black image and the color image, and when an image of a predetermined width of pixels of a black image area adjacent to said boundary is to be formed by pixels of color inks, the image is formed by dots of predetermined one of the colors and dots of at least two colors.

Claim 27

Dependent Claim 178 words

A color ink jet recording apparatus comprising: a black ink recording head for discharging black ink; plural color ink recording heads, for discharging color inks of plural colors, each different in color from said black ink; means for supplying said black ink recording head and said color ink recording heads with recording signals; and discrimination means for discriminating whether a black image is adjacent to a color image; wherein said supply means determines, for said black image, whether to supply a recording signal for discharging the black ink to said black ink recording head, or to supply recording signals for discharging the color inks to said color ink recording heads, based on discrimination by said discrimination means; and wherein there is a boundary between the black image and the color image, and when an image of a predetermined width of pixels of a black image area adjacent to said boundary is to be formed by pixels of color inks, the image is formed by dots of predetermined one of the colors and dots of at least two colors.

Claim 28

Dependent Claim 79 words

An apparatus according to claim 17, further comprising a buffer for storing black image data for forming said black image, a buffer for the black ink, and buffers for the color inks of plural colors, wherein said black image data comprises character code data and bit image data, and said character code data are stored in said buffer for the black ink, while said bit image data are stored in said buffers for the color inks of plural colors.

Claim 29

Dependent Claim 82 words

An apparatus according to claim 18, wherein said supply means, when said apparatus is printing character code data, supplies said black ink recording head with a recording signal for discharging the black ink, when data for another color are absent, in said buffers for color inks, in pixels the same as or adjacent to a print position of said character code data, but supplies the color ink recording heads with recording signals for discharging the color inks when such data are present.

Claim 30

Dependent Claim 71 words

An apparatus according to claim 18, wherein said supply means, when printing said bit image data, supplies said color ink recording heads with recording signals for discharging color inks when the data stored in the buffers for the color inks of plural colors are mutually different among different colors, but supplies said black ink recording head with a recording signal for discharging the black ink when said data are mutually equal.

Claim 31

Dependent Claim 20 words

An apparatus according to claim 17, wherein said color inks of plural colors are of yellow, magenta and cyan colors.

Claim 32

Dependent Claim 235 words

A color ink jet recording method for forming a color image on a recording medium by discharging inks thereon, comprising the steps of: forming an image with a black ink; forming an image with color inks of plural colors, each different from said black ink; discriminating whether a color image area is present adjacent to a black image having a periphery; and determining whether said black image is formed by depositing said black ink, or by depositing said color inks of plural colors on said recording medium, based on said discrimination, wherein said black image is formed by depositing said black ink when said black image is not adjacent to a color image, and said black image is formed by depositing the color inks of said plural colors when at least a part of the periphery of said black image is adjacent to the color image; wherein the periphery of said black image is adjacent to the color image, when at least a color recording pixel, constituting the color image, is present in a recording position within X·P (4√2≧X≧1), with respect to at least a black recording pixel constituting the black image on the recording medium, wherein P is the minimum pixel pitch in recording; and wherein said black ink has a penetration speed into said recording medium lower than the penetration speed into said recording medium of the color inks of said plural colors.

Claim 33

Dependent Claim 235 words

A color ink jet recording method for forming a color image on a recording medium by discharging inks thereon, comprising the steps of: forming an image with a black ink; forming an image with color inks of plural colors, each different from said black ink; discriminating whether a color image area is present adjacent to a black image having a periphery; and determining whether said black image is formed by depositing said black ink, or by depositing said color inks of plural colors on said recording medium, based on said discrimination, wherein said black image is formed by depositing said black ink when said black image is not adjacent to a color image, and said black image is formed by depositing the color inks of said plural colors when at least a part of the periphery of said black image is adjacent to the color image; wherein the periphery of said black image is adjacent to the color image, when at least a color recording pixel, constituting the color image, is present in a recording position within X·P (4√2≧X≧1), with respect to at least a black recording pixel constituting the black image on the recording medium, wherein P is the minimum pixel pitch in recording; and wherein said black ink has a penetration speed into said recording medium lower than the penetration speed into said recording medium of the color inks of said plural colors.

Claim 34

Dependent Claim 12 words

A color ink jet recording method according to claim 22, wherein X=1.

Claim 35

Dependent Claim 12 words

A color ink jet recording method according to claim 22, wherein X=√2.

Claim 36

Dependent Claim 12 words

A color ink jet recording method according to claim 22, wherein X=2.

Claim 37

Dependent Claim 12 words

A color ink jet recording method according to claim 22, wherein X=2√2.

Claim 38

Dependent Claim 44 words

A color ink jet recording method according to claim 22, wherein said discriminating step is applied only to the black image stored in a memory, and other black images are formed by depositing the color inks of said plural colors on said recording medium.

Claim 39

Dependent Claim 31 words

A color ink jet recording method according to claim 22, wherein said color inks of plural colors are of yellow, magenta and cyan colors or of green, red and blue colors.

Claim 40

Dependent Claim 18 words

A color ink jet recording method according to claim 22, wherein said inks are discharged by thermal energy.

Claim 41

Dependent Claim 17 words

A color image formed on a recording medium formed by the recording method according to claim 22.

Claim 42

Dependent Claim 269 words

A color ink jet recording method for forming a desired color image on a recording medium by discharging inks thereon, comprising the steps of: forming an image with a black ink; forming an image with color inks of plural colors, different from said black ink; discriminating whether a color image is present adjacent to a black image having a periphery; and determining whether said black image is formed with said black ink or with said color inks of plural colors, based on said discrimination; wherein said black ink and said color inks each have a blotting rate, represented by the formula A=B/C wherein A=blotting rate; B=diameter (μm) of a single dot formed on quality paper; and C=diameter (μm) of a discharged single ink droplet, wherein the blotting rate of said black ink is smaller than the blotting rates of said color inks; wherein said black image is formed by depositing said black ink on said recording medium when the periphery of said black image is not adjacent to a color image area, and a black image area is formed with the color inks of said plural colors when at least a part of the periphery of said black image is adjacent to said color image area; and wherein the periphery of said black image is discriminated to be adjacent to a color image when at least a color recording pixel, constituting said color image, is present in a position within a range X·P (4√2≧X≧1) with respect to at least a black recording pixel constituting the black image on the recording medium, wherein P is the minimum pixel recording pitch.

Claim 43

Dependent Claim 269 words

A color ink jet recording method for forming a desired color image on a recording medium by discharging inks thereon, comprising the steps of: forming an image with a black ink; forming an image with color inks of plural colors, different from said black ink; discriminating whether a color image is present adjacent to a black image having a periphery; and determining whether said black image is formed with said black ink or with said color inks of plural colors, based on said discrimination; wherein said black ink and said color inks each have a blotting rate, represented by the formula A=B/C wherein A=blotting rate; B=diameter (μm) of a single dot formed on quality paper; and C=diameter (μm) of a discharged single ink droplet, wherein the blotting rate of said black ink is smaller than the blotting rates of said color inks; wherein said black image is formed by depositing said black ink on said recording medium when the periphery of said black image is not adjacent to a color image area, and a black image area is formed with the color inks of said plural colors when at least a part of the periphery of said black image is adjacent to said color image area; and wherein the periphery of said black image is discriminated to be adjacent to a color image when at least a color recording pixel, constituting said color image, is present in a position within a range X·P (4√2≧X≧1) with respect to at least a black recording pixel constituting the black image on the recording medium, wherein P is the minimum pixel recording pitch.

Claim 44

Dependent Claim 12 words

A color ink jet recording method according to claim 31, wherein X=1.

Claim 45

Dependent Claim 12 words

A color ink jet recording method according to claim 31, wherein X=√2.

Claim 46

Dependent Claim 12 words

A color ink jet recording method according to claim 31, wherein X=2.

Claim 47

Dependent Claim 12 words

A color ink jet recording method according to claim 31, wherein X=2√2.

Claim 48

Dependent Claim 38 words

A color ink jet recording method according to claim 31, wherein the blotting rate is within a range of 1.2 to 2.5 for the black ink and within a range of 1.8 to 3.5 for the color inks.

Claim 49

Dependent Claim 29 words

A color ink jet recording method according to claim 36, wherein said black ink or said color inks contain at least one of a surfactant and a penetrating solvent.

Claim 50

Dependent Claim 40 words

A color ink jet recording method according to claim 37, wherein the surfactant added to said black ink or said color inks is an ionic surfactant, a nonionic surfactant, an amphoteric surfactant or a mixture of at least two thereof.

Claim 51

Dependent Claim 26 words

A color ink jet recording method according to claim 38, wherein the surfactant added to said black ink or said color inks is a nonionic surfactant.

Claim 52

Dependent Claim 54 words

A color ink jet recording method according to claim 39, wherein the surfactant added to said black ink or said color inks is at least one selected from the group consisting of ethylene oxide adducts of higher alcohols, ethylene oxide adducts of alkyl-phenols, ethylene oxide-propylene oxide copolymer, and ethylene oxide adducts of acetylene glycol.

Claim 53

Dependent Claim 44 words

A color ink jet recording method according to claim 37, wherein the penetrating solvent added to said black ink or said color inks is at least one compound selected from the group consisting of ethers, lower alkyl ethers of polyhydric alcohols, and monohydric alcohols.

Claim 54

Dependent Claim 45 words

A color ink jet recording method according to claim 31, wherein said discriminating step is applied only to the black image stored in a memory, and other black image images are formed by depositing the color inks of said plural colors on said recording medium.

Claim 55

Dependent Claim 31 words

A color ink jet recording method according to claim 31, wherein said color inks of plural colors are of yellow, magenta and cyan colors or of green, red arid blue colors.

Claim 56

Dependent Claim 26 words

A color ink jet recording method according to claim 31, wherein said black ink has a fixing time longer than fixing times for said color inks.

Claim 57

Dependent Claim 130 words

A color ink jet recording method for forming a color image on a recording medium by discharging inks thereon, comprising the steps of: forming an image with a black ink in accordance with black image data comprising character code data and bit image data; and forming an image with color inks of plural colors, each different from said black ink; wherein said black ink has a penetration speed into said recording medium lower than a penetration speed into said recording medium of said color inks of plural colors, wherein a discriminating step, which discriminates whether a color image is present adjacent to a black image, is applied only to the black image resulting from bit image data formed by depositing said color inks of plural colors on said recording medium.

Claim 58

Dependent Claim 130 words

A color ink jet recording method for forming a color image on a recording medium by discharging inks thereon, comprising the steps of: forming an image with a black ink in accordance with black image data comprising character code data and bit image data; and forming an image with color inks of plural colors, each different from said black ink; wherein said black ink has a penetration speed into said recording medium lower than a penetration speed into said recording medium of said color inks of plural colors, wherein a discriminating step, which discriminates whether a color image is present adjacent to a black image, is applied only to the black image resulting from bit image data formed by depositing said color inks of plural colors on said recording medium.

Claim 59

Dependent Claim 148 words

A color ink jet recording method for forming a desired color image on a recording medium by discharging inks thereon, comprising the steps of: forming an image with a black ink in accordance with black image data comprising character code data and bit image data; and forming an image with color inks of plural colors, different from said black ink; wherein said black ink and said color inks each have a blotting rate, represented by the formula A=B/C wherein A=blotting rate; B=diameter (μm) of a single dot formed on quality paper; and C=diameter (μm) of a discharged single ink droplet, wherein the blotting rate of said black ink is smaller than the blotting rates of said color inks; and wherein said discriminating step is applied only to a black image resulting from bit image data formed by depositing said color inks of plural colors on said recording medium.

Claim 60

Dependent Claim 148 words

A color ink jet recording method for forming a desired color image on a recording medium by discharging inks thereon, comprising the steps of: forming an image with a black ink in accordance with black image data comprising character code data and bit image data; and forming an image with color inks of plural colors, different from said black ink; wherein said black ink and said color inks each have a blotting rate, represented by the formula A=B/C wherein A=blotting rate; B=diameter (μm) of a single dot formed on quality paper; and C=diameter (μm) of a discharged single ink droplet, wherein the blotting rate of said black ink is smaller than the blotting rates of said color inks; and wherein said discriminating step is applied only to a black image resulting from bit image data formed by depositing said color inks of plural colors on said recording medium.

Claim 61

Dependent Claim 24 words

A color ink jet recording method according to any of claims 31 or 32 to 41, wherein said inks are discharged by thermal energy.

Claim 62

Dependent Claim 118 words

A color ink jet recording method forming a color image on a recording medium, using a black ink and color inks of plural colors different from said black ink, comprising the steps of: discriminating whether a color image is present adjacent to a black image having a periphery; determining whether said black image is formed with said black ink or with said color inks of plural colors based on said discrimination; forming said black image according to said determination; and forming a black image of a predetermined width of pixels adjacent to a boundary between the black image and the color image, by pixels of said black ink and pixels of one or more of said color inks.

Claim 63

Dependent Claim 118 words

A color ink jet recording method forming a color image on a recording medium, using a black ink and color inks of plural colors different from said black ink, comprising the steps of: discriminating whether a color image is present adjacent to a black image having a periphery; determining whether said black image is formed with said black ink or with said color inks of plural colors based on said discrimination; forming said black image according to said determination; and forming a black image of a predetermined width of pixels adjacent to a boundary between the black image and the color image, by pixels of said black ink and pixels of one or more of said color inks.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	2002-12-27	2003-06-28	2003-12-28	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	2006-12-27	2007-06-28	2007-12-28	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	2010-12-27	2011-06-28	2011-12-28	$7700.00	Window Closed / Lapsed

Ink-jet recording method employing inks of different characteristics and apparatus therefor

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