Patents by Inventor Hiroshi Tomioka

Hiroshi Tomioka has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 7594719
    Abstract: A mailing ink, an ink tank for mailing, an ink jet recording method for mailing and an ink jet recording apparatus for mailing that can reconcile preferable tint and visibility as indicia with readability by a 2-D bar code reader. The ink is a mailing ink used in ink jet recording. In the mailing ink, the ink tank, the ink jet recording method, and the ink jet recording apparatus, the ink provides an ‘a*’ of from ?10 to 15 and a ‘b*’ of from ?50 to ?15 according to the CIE L*a*b* color system in a printed portion obtained by applying the ink to a recording medium so as to give an application amount of ink of 4.5 mg per square inch, and provides an integrated value of reflection spectrum of 90 or lower in a wavelength region of from 380 nm to 730 nm in the printed portion.
    Type: Grant
    Filed: February 28, 2007
    Date of Patent: September 29, 2009
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hiroshi Tomioka, Hideki Yamakami, Masako Udagawa
  • Publication number: 20090238975
    Abstract: An ink jet ink providing an image having excellent lightfastness and having sticking resistance and intermittent ejection stability. The ink jet ink is characterized by containing at least a compound represented by the following general formula (I) and a compound represented by the following general formula (II).
    Type: Application
    Filed: February 20, 2009
    Publication date: September 24, 2009
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Hideki Yamakami, Hiroshi Tomioka, Daiji Okamura, Mitsuru Ishii, Satoshi Kudo, Otome Mori
  • Publication number: 20090238976
    Abstract: The present invention provides an ink jet ink, which gives a superior lightfastness to an ink image, has a superior sticking resistance and intermittent ejection stability, and gives a preferable color tone to the image. The ink includes an azo-based dye represented by formula (I) and a water-soluble organic solvent represented by bis(2-hydroxyethyl)sulfone represented by formula (II).
    Type: Application
    Filed: February 20, 2009
    Publication date: September 24, 2009
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Mitsuru Ishii, Hiroshi Tomioka, Daiji Okamura, Hideki Yamakami, Satoshi Kudo, Otome Mori
  • Publication number: 20090238974
    Abstract: An ink jet ink is provided which can retain good stability and shows superior intermittent ejection stability not only under a low-temperature, low-humidity environment but also a high-temperature, low-humidity environment even when the evaporation of water in the ink progresses. The ink jet ink includes a coloring material and water-soluble organic solvents, wherein the content of the coloring material is less than 7.0 mass %, the water-soluble organic solvents include glycerin and a branched alkanediol having hydroxyl groups at both terminals of its main chain, the content C of glycerin is 6.0 to 12.0 mass %, the content A of the branched alkanediol is 4.0 to 11.0 mass %, and the content A of the branched alkanediol and the total content B of the water-soluble organic solvents satisfy the relationship of 0.30?A/B?0.50.
    Type: Application
    Filed: February 18, 2009
    Publication date: September 24, 2009
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Minako Kawabe, Hiroshi Tomioka, Kumiko Mafune, Hideki Yamakami, Satomi Yanagimachi
  • Publication number: 20090238977
    Abstract: An ink jet ink is provided which contains at least a coloring material and a water-soluble organic solvent, where the water-soluble organic solvent contains a branched alkanediol having hydroxyl groups at both terminals of its main chain and at least one of a compound represented by the following general formula (1) and a compound represented by the following general formula (2): R1-[A]-R2??General formula (1)
    Type: Application
    Filed: February 26, 2009
    Publication date: September 24, 2009
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Minako Kawabe, Hiroshi Tomioka
  • Publication number: 20090214789
    Abstract: A mailing ink, an ink tank for mailing, an ink jet recording method for mailing and an ink jet recording apparatus for mailing that can reconcile preferable tint and visibility as indicia with readability by a 2-D bar code reader. The ink is a mailing ink used in ink jet recording. In the mailing ink, the ink tank, the ink jet recording method, and the ink jet recording apparatus, the ink provides an ‘a*’ of from ?10 to 15 and a ‘b*’ of from ?50 to ?15 according to the CIE L*a*b* color system in a printed portion obtained by applying the ink to a recording medium so as to give an application amount of ink of 4.5 mg per square inch, and provides an integrated value of reflection spectrum of 90 or lower in a wavelength region of from 380 nm to 730 nm in the printed portion.
    Type: Application
    Filed: April 29, 2009
    Publication date: August 27, 2009
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Hiroshi Tomioka, Hideki Yamakami, Masako Udagawa
  • Patent number: 7578585
    Abstract: An ink cartridge includes a thermal ink-jet head provided with a heat generating portion that generates thermal energy for ejecting the ink from an ejection opening, in which: the heat generating portion has, on its surface in contact with the ink, a protective layer containing at least one selected from the group consisting of a silicon oxide, a silicon nitride, and a silicon carbide; and the ink contains a substance that dissolves the protective layer and a compound represented by (R2)nA—. . . —N(R1)C(O)R3(R4)—(A) where A represents alkylene or alkenylene which forms a ring with a nitrogen atom, a carbonyl group and R3, R1 and R4 each represent hydrogen atom, hydroxyl, alkyl, alkenyl, acyl, carbamoyl, carboxyl or sulfonyl, R2 represents a group bonded to an arbitrary carbon atom of A and represents hydrogen atom, hydroxyl, alkyl, alkenyl, acyl, carbamoyl, carboxyl or sulfonyl, n represents 0 to 4, and R3 represents carbon or nitrogen atom, and a content X (% by mass) of the compound satisfies 1?X?30.
    Type: Grant
    Filed: January 3, 2007
    Date of Patent: August 25, 2009
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hideki Yamakami, Hiroshi Tomioka
  • Patent number: 7520927
    Abstract: There are provided: a liquid ink for ink jet including: water; a coloring material; 1,5-pentanediol; and a humectant, in which the content of 1,5-pentanediol is 3 mass % or more and 15 mass % or less, and the total of the content of 1,5-pentanediol and the content of the humectant is 10 mass % or more and 40 mass % or less; and an ink jet recording method using the ink.
    Type: Grant
    Filed: January 3, 2007
    Date of Patent: April 21, 2009
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hideki Yamakami, Hiroshi Tomioka, Hiroyuki Takuhara, Yuuko Negishi
  • Patent number: 7510604
    Abstract: There is provided a cyan ink for ink jet and an ink jet recording method using the same, which can reduce both reciprocating color uneven and beading without impairing fastness property even when a yellow ink or a magenta ink containing a specific coloring material with excellent fastness property is used. In the ink jet recording method using a yellow ink and a cyan ink, or a magenta ink and a cyan ink, the yellow ink and the magenta ink contain a specific coloring material and have a surface tension of 33.0 mN/m or more and 36.0 mN/m or less, and the cyan ink contains a specific phthalocyanine compound, contains 1,5-pentanediol as an organic solvent, and has a surface tension of 32.9 mN/m or more and 35.4 mN/m or less.
    Type: Grant
    Filed: January 3, 2007
    Date of Patent: March 31, 2009
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yuuko Negishi, Hiroshi Tomioka, Hiroyuki Takuhara, Hideki Yamakami
  • Patent number: 7445666
    Abstract: An ink jet ink which can form images whose bleeding resistance is high and whose bronzing phenomenon is suppressed, is provided. The ink is an ink jet ink for use together with a pigment ink. The ink jet ink is characterized in that: the ink jet ink contains a coloring material, a polyvalent metal and a water-soluble organic solvent(s); the coloring material is at least a compound represented by the general formula (I); a content (mol/g) of the polyvalent metal is 2.0×10?6 mol/g or more and 4.0×10?4 mol/g or less; a total content (mass %) of the water-soluble organic solvent(s) is 25.0 mass % or more with respect to the total mass of the ink; and in a dispersion distance distribution, measured by a small angle X-ray scattering method, of molecular aggregates in the ink jet ink whose coloring material concentration is adjusted to 0.5 mass %, a dispersion distance d75 value corresponding to 75% of a distribution is 12.60 nm or less.
    Type: Grant
    Filed: September 7, 2007
    Date of Patent: November 4, 2008
    Assignee: Canon Kabushiki Kaisha
    Inventors: Satomi Yanagimachi, Hiroshi Tomioka, Hiroyuki Takuhara, Minako Kawabe, Yuuki Nishino
  • Patent number: 7436545
    Abstract: If an ink for a particular color (for example, red) having an excellent color developing characteristic is used in addition to inks for three primary colors of subtractive color mixture, the high color reproducibility is to be maintained for a long period. To accomplish this, at least one (for example, a yellow ink) of the inks of two colors between which the hue angle of red, included in the three primary colors, is sandwiched is applied to an area of a printing medium to which a red ink is applied so that the inks overlap each other. Thus, the yellow ink, having a high weatherability, is applied to an area on the printing medium to which only the red ink, having a low weatherability, is otherwise applied. It is therefore possible to improve the weatherability while maintaining the color developing characteristic at a high level.
    Type: Grant
    Filed: August 11, 2004
    Date of Patent: October 14, 2008
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hiroshi Tomioka, Hiroyuki Takuhara, Tsuyoshi Kanke, Shin-ichi Tochihara, Shohei Tsutsumi
  • Publication number: 20080151028
    Abstract: An ink cartridge for storing ink includes a thermal ink-jet head provided with a heating portion that generates thermal energy for discharging the ink. The heating portion has, on its surface in contact with the ink, a protective layer containing at least one of a silicon oxide, a silicon nitride, and a silicon carbide. The ink contains a substance that dissolves the protective layer and a compound represented by the following formula (1), and the content X (% by mass) of the compound of the formula (1) satisfies a relationship of 1?X?30: R1-A-R2 ??Formula (1) wherein A represents one selected from —S—, —S(?O)—, and —S(?O)2—, and R1 and R2 each independently represent a group selected from a hydrogen atom, a hydroxyl group, an alkyl group, a hydroxyalkyl group, an alkenyl group, an acyl group, a carbamoyl group, a carboxyl group, and a sulfonyl group.
    Type: Application
    Filed: December 6, 2007
    Publication date: June 26, 2008
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Hideki Yamakami, Hiroshi Tomioka
  • Publication number: 20080136862
    Abstract: A pigment ink is provided which is used in an ink jet recording apparatus in which ejection orifices for a pigment ink and ejection orifices for at least one type of reactive ink that destabilizes a dispersed state of pigment in the pigment ink are capped with the identical cap provided with a unit for removing an ink in the cap, achieving compatibility between bleeding resistance and reliability. Where a mixed thickening ratio upon mixing the pigment ink and the reactive ink in equal volumes is represented by Y (%) and an ejection orifice-to-ejection orifice distance between the ejection orifice for the pigment ink and the ejection orifice for the reactive ink is represented by X (mm) (provided that X>0), Y and X satisfy a specific relationship.
    Type: Application
    Filed: July 3, 2007
    Publication date: June 12, 2008
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Minako Kawabe, Hiroshi Tomioka, Hiroyuki Takuhara, Satomi Yanagimachi, Yuuki Nishino
  • Publication number: 20080007606
    Abstract: An ink jet ink which can form images whose bleeding resistance is high and whose bronzing phenomenon is suppressed, is provided. The ink is an ink jet ink for use together with a pigment ink. The ink jet ink is characterized in that: the ink jet ink contains a coloring material, a polyvalent metal and a water-soluble organic solvent(s); the coloring material is at least a compound represented by the general formula (I); a content (mol/g) of the polyvalent metal is 2.0×10?6 mol/g or more and 4.0×10?4 mol/g or less; a total content (mass %) of the water-soluble organic solvent(s) is 25.0 mass % or more with respect to the total mass of the ink; and in a dispersion distance distribution, measured by a small angle X-ray scattering method, of molecular aggregates in the ink jet ink whose coloring material concentration is adjusted to 0.5 mass %, a dispersion distance d75 value corresponding to 75% of a distribution is 12.60 nm or less.
    Type: Application
    Filed: September 7, 2007
    Publication date: January 10, 2008
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Satomi Yanagimachi, Hiroshi Tomioka, Hiroyuki Takuhara, Minako Kawabe, Yuuki Nishino
  • Publication number: 20070242100
    Abstract: An image forming method using a black ink containing a pigment, a black ink containing a dye, and a reactive color ink capable of unstabilizing the dispersion state of the pigment in the black ink, wherein the method includes one of the steps of, on at least part of a region to which the black ink is to be applied, applying the reactive color ink, the black ink, and the black ink in that order so as to overlap, thereby applying these inks to a recording medium; and applying the black ink, the black ink, and the reactive color ink in that order so as to overlap, thereby applying these inks to a recording medium.
    Type: Application
    Filed: June 27, 2007
    Publication date: October 18, 2007
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: HIROYUKI TAKUHARA, HIROSHI TOMIOKA, MINAKO KAWABE, SATOMI YANAGIMACHI, YUUKI NISHINO
  • Patent number: 7244299
    Abstract: An ink jet recording ink comprising at least a copper phthalocyanine dye represented by the following general formula (1) and a compound represented by the following general formula (2):
    Type: Grant
    Filed: September 26, 2005
    Date of Patent: July 17, 2007
    Assignee: Canon Kabushiki Kaisha
    Inventors: Itaru Tsuji, Shinichi Tochihara, Hiroshi Tomioka, Koichi Osumi, Hiroyuki Takuhara, Minako Kawabe, Hideki Yamakami
  • Publication number: 20070148376
    Abstract: The invention provides a mailing ink, an ink tank for mailing, an ink jet recording method for mailing and an ink jet recording apparatus for mailing that can reconcile preferable tint and visibility as indicia with readability by a 2-D bar code reader. The ink is a mailing ink used in ink jet recording. In the mailing ink, the ink tank for mailing, the ink jet recording method for mailing and the ink jet recording apparatus for mailing, the ink provides an ‘a*’ of from ?10 to 15 and a ‘b*’ of from ?50 to ?15 according to the CIE L*a*b* color system in a printed portion obtained by applying the ink to a recording medium so as to give an application amount of ink of 4.5 mg per square inch, and provides an integrated value of reflection spectrum of 90 or lower in a wavelength region of from 380 nm to 730 nm in the printed portion.
    Type: Application
    Filed: February 28, 2007
    Publication date: June 28, 2007
    Applicant: Canon Kabushiki Kaisha
    Inventors: Hiroshi TOMIOKA, Hideki Yamakami, Masako Udagawa
  • Patent number: 7229166
    Abstract: Disclosed herein is an image-forming method, including performing image formation on the basis of pixel data by using at least a yellow recording agent, a magenta recording agent, and a third recording agent. A color represented on a recording medium by the third recording agent on a color space of CIE-L*a*b* has lightness higher than lightness of a color reproduction region represented on the recording medium by a combination of the yellow recording agent and the magenta recording agent, and has a hue angle in the color reproduction region. A difference in hue angle on the color space between a color represented by the yellow recording agent and a color represented by the magenta recording agent is in a range of 60 to 113°.
    Type: Grant
    Filed: August 10, 2004
    Date of Patent: June 12, 2007
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hiroshi Tomioka, Hiroyuki Takuhara, Shin-ichi Tochihara, Tsuyoshi Kanke, Yutaka Kurabayashi, Hiromichi Noguchi
  • Publication number: 20070109371
    Abstract: An ink cartridge includes an ink-jet head and plural liquid chambers storing inks different from each other. The minimum value A1 (g/ml) for the ink densities of the inks stored in the plural liquid chambers and the maximum value B1 (g/ml) for the ink densities of inks each obtained by evaporating 10 mass % of each of the inks stored in the plural liquid chambers satisfy the relationship of (B1?A1)/A1?0.100. A stable image can be obtained, in which, even when the ink cartridge is stored for a long time period at the time of physical distribution, or is stored for a long time period in a state of being mounted on a recording apparatus so that the stored inks are brought into a situation in which the inks are apt to evaporate, a change in color balance is small as compared to an initial state.
    Type: Application
    Filed: January 3, 2007
    Publication date: May 17, 2007
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Hiroshi Tomioka, Hiroyuki Takuhara, Hideki Yamakami, Yuuko Negishi
  • Publication number: 20070109390
    Abstract: An ink cartridge includes a thermal ink-jet head provided with a heat generating portion that generates thermal energy for ejecting the ink from an ejection opening, in which: the heat generating portion has, on its surface in contact with the ink, a protective layer containing at least one selected from the group consisting of a silicon oxide, a silicon nitride, and a silicon carbide; and the ink contains a substance that dissolves the protective layer and a compound represented by (R2)nA—. . . —N(R1)C(O)R3(R4)—(A) where A represents alkylene or alkenylene which forms a ring with a nitrogen atom, a carbonyl group and R3, R1 and R4 each represent hydrogen atom, hydroxyl, alkyl, alkenyl, acyl, carbamoyl, carboxyl or sulfonyl, R2 represents a group bonded to an arbitrary carbon atom of A and represents hydrogen atom, hydroxyl, alkyl, alkenyl, acyl, carbamoyl, carboxyl or sulfonyl, n represents 0 to 4, and R3 represents carbon or nitrogen atom, and a content X (% by mass) of the compound satisfies 1?X?30.
    Type: Application
    Filed: January 3, 2007
    Publication date: May 17, 2007
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Hideki Yamakami, Hiroshi Tomioka