Patents by Inventor Hideki Yamakami

Hideki Yamakami 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: 8814341
    Abstract: Provided is an ink capable of recording an image that is excellent in ozone resistance, hardly causes blurring or color change even in a high-humidity environment, and is excellent in humidity resistance. The ink includes a coloring material and a lithium ion. The coloring material includes a compound represented by the following general formula (I) and a content of the lithium ion in the ink is 3.5 times or more in terms of molar ratio with respect to a content of the compound represented by the general formula (I).
    Type: Grant
    Filed: May 10, 2013
    Date of Patent: August 26, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventors: Ryosuke Nagao, Jun Yoshizawa, Hideki Yamakami, Kuniaki Fujimoto, Yukako Tamanuki, Otome Yamashita, Minako Kawabe, Junichi Sakai, Satoshi Kudo
  • Patent number: 8757776
    Abstract: An ink to be applied to a recording head having a common liquid chamber, pressure chambers developing pressure applied to the liquid, individual channels through which the liquid is introduced into the pressure chambers from the common liquid chamber, and a group of nozzles which communicate with the pressure chambers and eject the liquid, where first nozzles having short individual channels and second nozzles having long ones are alternately arranged at arrangement intervals of less than 30 ?m along one side or sides of the common liquid chamber, contains an aqueous medium, a surfactant and a coloring material. The aqueous medium consists of water and a water-soluble organic compound containing at least one alkanediol and has a surface tension of from 40 mN/m or more to less than 60 mN/m in an environment of temperature 25° C. and humidity 50%.
    Type: Grant
    Filed: June 28, 2013
    Date of Patent: June 24, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hideki Yamakami, Daiji Okamura, Hiroshi Tomioka, Chiaki Muraoka, Masaki Oikawa
  • Publication number: 20130335490
    Abstract: Provided is an ink capable of recording an image that is excellent in ozone resistance, hardly causes blurring or color change even in a high-humidity environment, and is excellent in humidity resistance. The ink includes a coloring material and a lithium ion. The coloring material includes a compound represented by the following general formula (I) and a content of the lithium ion in the ink is 3.5 times or more in terms of molar ratio with respect to a content of the compound represented by the general formula (I).
    Type: Application
    Filed: May 10, 2013
    Publication date: December 19, 2013
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Ryosuke Nagao, Jun Yoshizawa, Hideki Yamakami, Kuniaki Fujimoto, Yukako Tamanuki, Otome Yamashita, Minako Kawabe, Junichi Sakai, Satoshi Kudo
  • Publication number: 20130300802
    Abstract: An ink to be applied to a recording head having a common liquid chamber, pressure chambers developing pressure applied to the liquid, individual channels through which the liquid is introduced into the pressure chambers from the common liquid chamber, and a group of nozzles which communicate with the pressure chambers and eject the liquid, where first nozzles having short individual channels and second nozzles having long ones are alternately arranged at arrangement intervals of less than 30 ?m along one side or sides of the common liquid chamber, contains an aqueous medium, a surfactant and a coloring material. The aqueous medium consists of water and a water-soluble organic compound containing at least one alkanediol and has a surface tension of from 40 mN/m or more to less than 60 mN/m in an environment of temperature 25° C. and humidity 50%.
    Type: Application
    Filed: June 28, 2013
    Publication date: November 14, 2013
    Inventors: HIDEKI YAMAKAMI, DAIJI OKAMURA, HIROSHI TOMIOKA, CHIAKI MURAOKA, MASAKI OIKAWA
  • Patent number: 8500265
    Abstract: An ink to be applied to a recording head having a common liquid chamber, pressure chambers developing pressure applied to the liquid, individual channels through which the liquid is introduced into the pressure chambers from the common liquid chamber, and a group of nozzles which communicate with the pressure chambers and eject the liquid, where first nozzles having short individual channels and second nozzles having long ones are alternately arranged at arrangement intervals of less than 30 ?m along one side or sides of the common liquid chamber, contains an aqueous medium, a surfactant and a coloring material. The aqueous medium consists of water and a water-soluble organic compound containing at least one alkanediol and has a surface tension of from 40 mN/m or more to less than 60 mN/m in an environment of temperature 25° C. and humidity 50%.
    Type: Grant
    Filed: April 15, 2009
    Date of Patent: August 6, 2013
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hideki Yamakami, Daiji Okamura, Hiroshi Tomioka, Chiaki Muraoka, Masaki Oikawa
  • Patent number: 8123846
    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: Grant
    Filed: February 20, 2009
    Date of Patent: February 28, 2012
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hideki Yamakami, Hiroshi Tomioka, Daiji Okamura, Mitsuru Ishii, Satoshi Kudo, Otome Mori
  • Patent number: 8083341
    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: Formula (1) R1-A-R2, 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: Grant
    Filed: December 6, 2007
    Date of Patent: December 27, 2011
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hideki Yamakami, Hiroshi Tomioka
  • Patent number: 8070871
    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: Grant
    Filed: February 18, 2009
    Date of Patent: December 6, 2011
    Assignee: Canon Kabushiki Kaisha
    Inventors: Minako Kawabe, Hiroshi Tomioka, Kumiko Mafune, Hideki Yamakami, Satomi Yanagimachi
  • Patent number: 8029612
    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: Grant
    Filed: February 20, 2009
    Date of Patent: October 4, 2011
    Assignee: Canon Kabushiki Kaisha
    Inventors: Mitsuru Ishii, Hiroshi Tomioka, Daiji Okamura, Hideki Yamakami, Satoshi Kudo, Otome Mori
  • Patent number: 7988277
    Abstract: An ink set is provided which can suppress bleeding irrespective of the type of recording medium. The ink set includes a plurality of aqueous inks each containing a dye, and has at least a first aqueous ink containing a dye, wherein the difference between the dynamic surface tension of the first aqueous ink at a lifetime of 50 milliseconds and the dynamic surface tension of the first aqueous ink at a lifetime of 500 milliseconds is 7 mN/m or more; and, between the first aqueous ink and at least one type of aqueous ink except the first aqueous ink included in the ink set, dynamic surface tension ?a (mN/m) of an ink A having relatively higher lightness at a lifetime of 500 milliseconds and dynamic surface tension ?b (mN/m) of an ink B having relatively lower lightness at a lifetime of 500 milliseconds satisfy ?5?(?a??b)?3.
    Type: Grant
    Filed: May 7, 2008
    Date of Patent: August 2, 2011
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kenji Moribe, Satoshi Kudo, Mikio Sanada, Hideki Yamakami
  • Patent number: 7883185
    Abstract: There is provided an ink cartridge including: a thermal ink-jet head provided with a heat generating portion that generates thermal energy for ejecting ink from an ejection opening, and contains the ink. In the ink cartridge, the heat generating portion has, at 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 at least one of a polyvalent carboxylic acid and a salt thereof, and the total content of the polyvalent carboxylic acid and the salt thereof is in the range of from 0.001 mmol/l or more to 0.5 mmol/l or less. The ink cartridge shows a small change in driving pulse and a small change in image to be outputted, and provides sufficient ejection property and sufficient printing durability.
    Type: Grant
    Filed: January 3, 2007
    Date of Patent: February 8, 2011
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hiroshi Tomioka, Hideki Yamakami
  • Patent number: 7866809
    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: April 29, 2009
    Date of Patent: January 11, 2011
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hiroshi Tomioka, Hideki Yamakami, Masako Udagawa
  • Patent number: 7682433
    Abstract: In an ink set having a plurality of inks, the ink set has at least a pigment ink and a dye ink. The pigment ink contains at least water, a surfactant, a self-dispersion pigment, and a poor medium for self-dispersion pigment and/or a salt; a dynamic surface tension of the pigment ink at a lifetime of 50 milliseconds is higher than 47 mN/m. The dye ink contains at least water, a surfactant and a dye. An ink set is provided which can obtain images having a high image density and a superior bleeding resistance without regard to the types of recording mediums.
    Type: Grant
    Filed: May 7, 2008
    Date of Patent: March 23, 2010
    Assignee: Canon Kabushiki Kaisha
    Inventors: Satomi Yanagimachi, Kumiko Mafune, Mikio Sanada, Kenji Moribe, Tomonari Watanabe, Daiji Okamura, Hideki Yamakami, Satoshi Kudo, Fumiharu Nakamura
  • Publication number: 20090274840
    Abstract: An ink to be applied to a recording head having a common liquid chamber, pressure chambers developing pressure applied to the liquid, individual channels through which the liquid is introduced into the pressure chambers from the common liquid chamber, and a group of nozzles which communicate with the pressure chambers and eject the liquid, where first nozzles having short individual channels and second nozzles having long ones are alternately arranged at arrangement intervals of less than 30 ?m along one side or sides of the common liquid chamber, contains an aqueous medium, a surfactant and a coloring material. The aqueous medium consists of water and a water-soluble organic compound containing at least one alkanediol and has a surface tension of from 40 mN/m or more to less than 60 mN/m in an environment of temperature 25° C. and humidity 50%.
    Type: Application
    Filed: April 15, 2009
    Publication date: November 5, 2009
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Hideki Yamakami, Daiji Okamura, Hiroshi Tomioka, Chiaki Muraoka, Masaki Oikawa
  • Patent number: 7604335
    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: Grant
    Filed: January 3, 2007
    Date of Patent: October 20, 2009
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hiroshi Tomioka, Hiroyuki Takuhara, Hideki Yamakami, Yuuko Negishi
  • 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: 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