Patents by Inventor Mitsuyoshi Tamura

Mitsuyoshi Tamura 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: 8841356
    Abstract: Disclosed is an ink composition which has superior storage stability, is resistant to bleeding, has good fixability to paper, and enables printing of a clear image. The ink composition includes a pigment dispersion containing a surface-treated pigment and a resin emulsion, wherein the surface-treated pigment is obtained by binding a functional group, having a larger calcium index than a calcium index of 1,2,3-benzenetricarboxylic acid, to the surface of a pigment; and the resin emulsion is adapted so that an aqueous solution containing 1 mass % of a solid content of the resin emulsion has a conductance of 300 ?S/cm or less.
    Type: Grant
    Filed: September 30, 2010
    Date of Patent: September 23, 2014
    Assignee: DNP Fine Chemicals Co., Ltd.
    Inventors: Satoshi Shioda, Tatsuro Ishitobi, Takao Otomaru, Rumiko Matsuo, Masaki Inumaru, Yukio Sugita, Fumie Yamazaki, Naoki Shiraishi, Mitsuyoshi Tamura, Ataru Miyata
  • Patent number: 8814335
    Abstract: An inkjet recording method characterized by adhering a receiving solution (A) to at least areas on a recording medium (R) which are to be printed with an inkjet ink (I) or the whole surface of the medium (R) which is to be printed, said receiving solution (A) being a solution obtained by dissolving (inclusive of dispersing) one or more metal salts (S) selected from among at least divalent, calcium salts, magnesium salts, nickel salts, aluminum salts, boron salts, and zinc salts and one or more resins (B) having hydrophilic groups in an aqueous solvent in such amounts that the concentrations of the metal salts (S) and the resins (B) fall within the range of 0.005 to 2.0 mol/l and within the range of 0.5 to 20 mass % respectively, and then applying the inkjet ink (1) to areas where the metal salts are present in an adhered state to carry out printing.
    Type: Grant
    Filed: March 27, 2012
    Date of Patent: August 26, 2014
    Assignee: DNP Fine Chemicals Co., Ltd.
    Inventors: Masaki Inumaru, Takao Otomaru, Yukio Sugita, Mitsuyoshi Tamura, Fumie Yamazaki, Naoki Shiraishi, Yoshiki Nozaka
  • Publication number: 20140132661
    Abstract: Provided is an inkjet recording method which minimizes blur and achieves excellent fixing to a recoding medium. This inkjet recording method is characterized by adhering a receiving solution (A) to at least areas on a recording medium (R) which are to be printed with an inkjet ink (I) or the whole surface of the medium (R) which is to be printed, said receiving solution (A) being a solution obtained by dissolving (inclusive of dispersing) one or more metal salts (S) selected from among at least divalent, calcium salts, magnesium salts, nickel salts, aluminum salts, boron salts, and zinc salts and one or more resins (B) having hydrophilic groups in an aqueous solvent in such amounts that the concentrations of the metal salts (S) and the resins (B) fall within the range of 0.005 to 2.0 mol/l and within the range of 0.5 to 20 mass % respectively, and then applying the inkjet ink (I) to areas where the metal salts are present in an adhered state to carry out printing.
    Type: Application
    Filed: March 27, 2012
    Publication date: May 15, 2014
    Applicants: DNP FINE CHEMICALS CO., LTD., DAI NIPPON PRINTING CO., LTD.
    Inventors: Yoshiki NOZAKA, Fumie YAMAZAKI, Mitsuyoshi TAMURA, Yukio SUGITA, Takao OTOMARU, Masaki INUMARU, Naoki SHIRAISHI
  • Publication number: 20140055520
    Abstract: An inkjet recording method which suppresses feathering and color bleeding and is excellent in fixability to a recording medium. The inkjet recording method includes the steps of applying an ink-receiving solution prepared by dissolving in an aqueous solvent at least one metal salt having a water solubility of 0.1 mol/l or more, selected from calcium salts, magnesium salts, nickel salts and zinc salts having a valence of 2 or more, to at least the surface to be printed by using an inkjet ink or the entire surface of a recording medium; and printing on the metal salt adhered part by using the inkjet ink comprising at least a pigment, a resin emulsion and an aqueous solvent containing a surfactant. Further, a phosphorus-containing group having at least one P—O or P?O bond is bound to the surface of the pigment.
    Type: Application
    Filed: December 26, 2011
    Publication date: February 27, 2014
    Applicants: DNP FINE CHEMICALS CO., LTD., DAI NIPPON PRINTING CO., LTD.
    Inventors: Masaki Inumaru, Satoshi Shioda, Takao Otomaru, Yukio Sugita, Mitsuyoshi Tamura, Fumie Yamazaki, Naoki Shiraishi
  • Patent number: 8557032
    Abstract: The object of the invention is to provide an inkjet recording oil green ink composition that excels more in terms of all the quality of prints, stability on printing, the ability of prints to be dried, and ink storage stability, and is capable of making wider a color reproduction area expressed by yellow and cyan. The inkjet recording oil green ink composition contains as an organic green pigment coloring agent C. I. Pigment Green 58 comprising a (poly) halogenated zinc phthalocyanine. The invention also provides an ink set comprises the inventive oil green ink composition and further includes at least an oil yellow ink composition and an oil cyan ink composition.
    Type: Grant
    Filed: March 24, 2009
    Date of Patent: October 15, 2013
    Assignee: The Inctec Inc.
    Inventors: Yukio Sugita, Mitsuyoshi Tamura, Fumie Yamazaki, Mitsuteru Yamada, Naoki Shiraishi
  • Patent number: 8440744
    Abstract: The present invention is proposed is an oil-based white ink composition for ink jet recording, comprising a white pigment, a glycol ether dialkyl ether compound solvent, a polymeric dispersant, and a specific acrylic resin. The white pigment is formed of titanium oxide fine particles having an average particle diameter of not less than 0.15 ?m and not more than 0.25 ?m and coated with at least one of aluminum oxide and silicon oxide. The white pigment is further coated with not less than 0.01% by mass and not more than 2.5% by mass of at least one of an SiH-containing polysiloxane and dimethylpolysiloxane.
    Type: Grant
    Filed: March 26, 2008
    Date of Patent: May 14, 2013
    Assignee: The Inctec Inc.
    Inventors: Yukio Sugita, Mitsuyoshi Tamura, Mitsuteru Yamada, Fumie Yamazaki, Tamayo Okahira
  • Publication number: 20120308786
    Abstract: Disclosed is an ink composition which has superior storage stability, is resistant to bleeding, has good fixability to paper, and enables printing of a clear image. The ink composition includes a pigment dispersion containing a surface-treated pigment and a resin emulsion, wherein the surface-treated pigment is obtained by binding a functional group, having a larger calcium index than a calcium index of 1,2,3-benzenetricarboxylic acid, to the surface of a pigment; and the resin emulsion is adapted so that an aqueous solution containing 1 mass % of a solid content of the resin emulsion has a conductance of 300 ?S/cm or less.
    Type: Application
    Filed: September 30, 2010
    Publication date: December 6, 2012
    Inventors: Satoshi Shioda, Tatsuro Ishitobi, Takao Otomaru, Rumiko Matsuo, Eiichi Miyata, Ataru Miyata, Masaki Inumaru, Yukio Sugita, Fumie Yamazaki, Naoki Shiraishi, Mitsuyoshi Tamura
  • Patent number: 8008368
    Abstract: An oil-based ink composition for inkjet recording capable of exhibiting desired properties of drying after print, rubfastness and re-solubility is achieved by performing solubilization on an acrylic resin which is not easily dissolved conventionally. The oil-based ink composition for inkjet printing comprises glycol ether dialkyl ethers as a prime solvent; and an acrylic resin that results from solution polymerization in a solvent of the glycol ether dialkyl ethers by use of a radical polymerization initiator.
    Type: Grant
    Filed: December 21, 2006
    Date of Patent: August 30, 2011
    Assignees: Seiko Epson Corporation, The Inctec Inc.
    Inventors: Seiji Mochizuki, Makoto Otsuki, Masahiro Nakamura, Yukio Sugita, Mitsuyoshi Tamura, Fumie Yamazaki, Tamayo Okahira
  • Patent number: 7886581
    Abstract: The invention provides an oil-based ink composition for ink jet recording, which is best suited for printing onto polyvinyl chloride substrates, and improved in terms of both the stabilities of ink on storage and jetting, and a method for inspecting the same. The oil-based ink composition for ink jet recording comprises as a main solvent at least a specific polyalkylene glycol dialkyl ether and containing at least a specific quinacridone pigment component. That composition should be such that when a measuring sample comprising it is analyzed by means of high speed liquid chromatography under specific measuring conditions, the concentration of a component having a peak at the holding time of 10.3 minutes is 0.4 ppm or less.
    Type: Grant
    Filed: October 16, 2007
    Date of Patent: February 15, 2011
    Assignees: Seiko Epson Corporation, The Inctec Inc.
    Inventors: Takashi Kozuchi, Kazuhiko Hara, Yukio Sugita, Mitsuyoshi Tamura, Fumie Yamazaki, Mitsuteru Yamada
  • Publication number: 20110034596
    Abstract: The invention provides an oil-based ink composition for ink jet recording, which is best suited for printing onto polyvinyl chloride substrates, and improved in terms of both the stabilities of ink on storage and jetting, and a method for inspecting the same. The oil-based ink composition for ink jet recording comprises as a main solvent at least a specific polyalkylene glycol dialkyl ether and containing at least a specific quinacridone pigment component. That composition should be such that when a measuring sample comprising it is analyzed by means of high speed liquid chromatography under specific measuring conditions, the concentration of a component having a peak at the holding time of 10.3 minutes is 0.4 ppm or less.
    Type: Application
    Filed: October 25, 2010
    Publication date: February 10, 2011
    Applicants: SEIKO EPSON CORPORATION, THE INCTEC INC.
    Inventors: Takashi KOZUCHI, Kazuhiko HARA, Yukio SUGITA, Mitsuyoshi TAMURA, Fumie YAMAZAKI, Mitsuteru YAMADA
  • Patent number: 7806972
    Abstract: The object of the invention is to provide an oil ink set capable of obtaining images having high color reproduction capabilities and high color saturation in particular. The oil ink set of the invention comprises a firsts a second, and a third oil ink having a wavelength region in which the reflectivity of each oil ink on a recording medium changes from 80% to 5% in the wavelength range of 400 nm to 700 nm. In this wavelength region, the reflectivity of the first oil ink is continuously higher than that of the first oil ink, and in the wavelength in which the reflectivity of the second oil ink changes from 80% to 5%, the reflectivity of the third oil ink is continuously higher than that of the second oil ink. Moreover, the coloring materials in the first, the second and the third oil inks are all different.
    Type: Grant
    Filed: March 24, 2009
    Date of Patent: October 5, 2010
    Assignee: The Intec Inc.
    Inventors: Yukio Sugita, Mitsuyoshi Tamura, Fumie Yamazaki, Mitsuteru Yamada, Naoki Shiraishi
  • Patent number: 7754784
    Abstract: An oil-based ink composition for inkjet printers contains a fixing polymer and a solvent represented by the following formula (1): wherein X1 represents an alkyl group, X2 represents a hydrogen atom or alkyl group, and n stands for an integer of from 1 to 4. The fixing polymer is an acrylic polymer obtained by subjecting an acrylic monomer to solution polymerization with a radical polymerization initiator in the solvent. A production process of the oil-based ink composition is also disclosed.
    Type: Grant
    Filed: April 26, 2007
    Date of Patent: July 13, 2010
    Assignee: The Inctec Inc.
    Inventors: Yukio Sugita, Mitsuyoshi Tamura, Mitsuteru Yamada, Tamayo Okahira
  • Publication number: 20100174013
    Abstract: The inventive oil base ink composition for ink jet recording has a binder resin, a dispersant and at least C.I. Pigment Yellow 213 as an organic pigment contained in an organic solvent comprising a specific polyalkylene glycol dialkyl ether and a specific cyclic ester, and having a boiling point of 150° C. to 280° C. This ink composition is highly safe for the human body, ensures that print quality is maintained over extended periods of time, and is improved in weather resistance.
    Type: Application
    Filed: June 11, 2008
    Publication date: July 8, 2010
    Applicant: THE INCTEC INC.
    Inventors: Yukio Sugita, Mitsuyoshi Tamura, Mitsuteru Yamada, Fumie Yamazaki
  • Publication number: 20100105807
    Abstract: The present invention is proposed is an oil-based white ink composition for ink jet recording, comprising a white pigment, a glycol ether dialkyl ether compound solvent, a polymeric dispersant, and a specific acrylic resin. The white pigment is formed of titanium oxide fine particles having an average particle diameter of not less than 0.15 ?m and not more than 0.25 ?m and coated with at least one of aluminum oxide and silicon oxide. The white pigment is further coated with not less than 0.01% by mass and not more than 2.5% by mass of at least one of an SiH-containing polysiloxane and dimethylpolysiloxane.
    Type: Application
    Filed: March 26, 2008
    Publication date: April 29, 2010
    Applicant: The Inctec Inc.
    Inventors: Yukio Sugita, Mitsuyoshi Tamura, Mitsuteru Yamada, Fumie Yamazaki, Tamayo Okahira
  • Publication number: 20090239980
    Abstract: The object of the invention is to provide an inkjet recording oil green ink composition that excels more in terms of all the quality of prints, stability on printing, the ability of prints to be dried, and ink storage stability, and is capable of making wider a color reproduction area expressed by yellow and cyan. The inkjet recording oil green ink composition contains as an organic green pigment coloring agent C. I. Pigment Green 58 comprising a (poly) halogenated zinc phthalocyanine. The invention also provides an ink set comprises the inventive oil green ink composition and further includes at least an oil yellow ink composition and an oil cyan ink composition.
    Type: Application
    Filed: March 24, 2009
    Publication date: September 24, 2009
    Applicant: THE INCTEC INC.
    Inventors: Yukio Sugita, Mitsuyoshi Tamura, Fumie Yamazaki, Mitsuteru Yamada, Naoki Shiraishi
  • Publication number: 20090235843
    Abstract: The object of the invention is to provide an oil ink set capable of obtaining images having high color reproduction capabilities and high color saturation in particular. The oil ink set of the invention comprises a firsts a second, and a third oil ink having a wavelength region in which the reflectivity of each oil ink on a recording medium changes from 80% to 5% in the wavelength range of 400 nm to 700 nm. In this wavelength region, the reflectivity of the first oil ink is continuously higher than that of the first oil ink, and in the wavelength in which the reflectivity of the second oil ink changes from 80% to 5%, the reflectivity of the third oil ink is continuously higher than that of the second oil ink. Moreover, the coloring materials in the first, the second and the third oil inks are all different.
    Type: Application
    Filed: March 24, 2009
    Publication date: September 24, 2009
    Applicant: THE INCTEC INC.
    Inventors: Yukio Sugita, Mitsuyoshi Tamura, Fumie Yamazaki, Mitsuteru Yamada, Naoki Shiraishi
  • Publication number: 20090030121
    Abstract: The invention provides an oil-based ink composition for ink jet recording, which is best suited for printing onto polyvinyl chloride substrates, and improved in terms of both the stabilities of ink on storage and jetting, and a method for inspecting the same. The oil-based ink composition for ink jet recording comprises as a main solvent at least a specific polyalkylene glycol dialkyl ether and containing at least a specific quinacridone pigment component. That composition should be such that when a measuring sample comprising it is analyzed by means of high speed liquid chromatography under specific measuring conditions, the concentration of a component having a peak at the holding time of 10.3 minutes is 0.4 ppm or less.
    Type: Application
    Filed: October 16, 2007
    Publication date: January 29, 2009
    Applicants: SEIKO EPSON CORPORATION, THE INCTEC INC.
    Inventors: Takashi Kozuchi, Kazuhiko Hara, Yukio Sugita, Mitsuyoshi Tamura, Fumie Yamazaki, Mitsuteru Yamada
  • Patent number: 7393398
    Abstract: An oil-based ink for piezoelectric inkjet printers contains a binder resin, a pigment and a solvent. The solvent contains a cyclic ester and a compound represented by the following formula (1): wherein X1 represents an alkyl group, X2 represents a hydrogen atom or an alkyl group, and n stands for an integer of from 1 to 4. The amount of the cyclic ester is from 1 to 60 parts by weight per 100 parts by weight of the compound represented by the formula (1). Preferably, the cyclic ester is a compound represented by the following formula (2): wherein X3 and X4 each independently represents a hydrogen atom or a C1-7 alkyl or alkenyl group, and m stands for an integer of from 1 to 3.
    Type: Grant
    Filed: June 30, 2005
    Date of Patent: July 1, 2008
    Assignee: The Inctec Inc.
    Inventors: Yukio Sugita, Mitsuyoshi Tamura
  • Publication number: 20070270525
    Abstract: An oil-based ink composition for inkjet printers contains a fixing polymer and a solvent represented by the following formula (1): wherein X1 represents an alkyl group, X2 represents a hydrogen atom or alkyl group, and n stands for an integer of from 1 to 4. The fixing polymer is an acrylic polymer obtained by subjecting an acrylic monomer to solution polymerization with a radical polymerization initiator in the solvent. A production process of the oil-based ink composition is also disclosed.
    Type: Application
    Filed: April 26, 2007
    Publication date: November 22, 2007
    Applicant: The Inctec Inc.
    Inventors: Yukio Sugita, Mitsuyoshi Tamura, Mitsuteru Yamada, Tamayo Okahira
  • Publication number: 20070167538
    Abstract: An oil-based ink composition for inkjet recording capable of exhibiting desired properties of drying after print, rubfastness and re-solubility is achieved by performing solubilization on an acrylic resin which is not easily dissolved conventionally. The oil-based ink composition for inkjet printing comprises glycol ether dialkyl ethers as a prime solvent; and an acrylic resin that results from solution polymerization in a solvent of the glycol ether dialkyl ethers by use of a radical polymerization initiator.
    Type: Application
    Filed: December 21, 2006
    Publication date: July 19, 2007
    Inventors: Seiji Mochizuki, Makoto Otsuki, Masahiro Nakamura, Yukio Sugita, Mitsuyoshi Tamura, Fumie Yamazaki, Tamayo Okahira