Patents by Inventor Hidehito HARUKI

Hidehito HARUKI 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: 10379452
    Abstract: Provided is a color image forming process using colorant-containing toners of multiple colors containing colorants respectively having different resistances, wherein each of the colorant-containing toners contains an amorphous resin, a crystalline polyester resin, and a mold release agent, at least the crystalline polyester resin contained in the colorant-containing toner other than the colorant-containing toner containing a colorant having the lowest resistance contains a hybrid crystalline polyester resin formed by bonding a crystalline polyester polymerized segment and an amorphous polymerized segment, and the content of the amorphous polymerized segment in the hybrid crystalline polyester resin contained in the colorant-containing toner other than the colorant-containing toner containing a colorant having the lowest resistance is greater than the content of the amorphous polymerized segment in the crystalline polyester resin contained in the colorant-containing toner containing a colorant having the lowes
    Type: Grant
    Filed: April 9, 2018
    Date of Patent: August 13, 2019
    Assignee: KONICA MINOLTA, INC.
    Inventors: Natsuki Ito, Noboru Ueda, Kouji Sugama, Kenshi Miyajima, Yohei Ohno, Hidehito Haruki, Keisuke Asano
  • Patent number: 10203621
    Abstract: An image forming method includes using yellow toner, magenta toner, cyan toner, and black toner in which each of the yellow toner, the magenta toner, the cyan toner, and the black toner includes a crystalline polyester resin having a constitutional unit derived from a linear chain aliphatic diol, an amorphous resin, a colorant, and a releasing agent. A carbon number of a linear chain aliphatic diol component forming the crystalline polyester resin contained in the black toner is 6 or more, and a carbon number of a linear chain aliphatic diol component forming the crystalline polyester resin contained in each of the yellow toner, the magenta toner, and the cyan toner is 3 or more and 5 or less.
    Type: Grant
    Filed: November 22, 2017
    Date of Patent: February 12, 2019
    Assignee: KONICA MINOLTA, INC.
    Inventors: Kenshi Miyajima, Noboru Ueda, Kouji Sugama, Natsuki Ito, Yohei Ohno, Hidehito Haruki, Keisuke Asano
  • Patent number: 10168631
    Abstract: An object of the present invention is to provide an electrostatic image developing toner containing toner mother particles, wherein the toner mother particle is formed by being provided with a plurality of convex portions on a toner mother particle precursor; the toner mother particle precursor contains a vinyl resin, a crystalline resin, and a mold release agent; the convex portion is formed with a hybrid amorphous polyester resin which is formed with a vinyl type polymerization segment and a polyester type polymerization segment both bonded together; and the hybrid amorphous polyester resin contains constituting units of a bisphenol A-propylene oxide adduct and a bisphenol A-ethylene oxide adduct.
    Type: Grant
    Filed: October 18, 2017
    Date of Patent: January 1, 2019
    Assignee: KONICA MINOLTA, INC.
    Inventors: Hidehito Haruki, Kouji Sugama, Noboru Ueda
  • Publication number: 20180307152
    Abstract: Provided is a color image forming process using colorant-containing toners of multiple colors containing colorants respectively having different resistances, wherein each of the colorant-containing toners contains an amorphous resin, a crystalline polyester resin, and a mold release agent, at least the crystalline polyester resin contained in the colorant-containing toner other than the colorant-containing toner containing a colorant having the lowest resistance contains a hybrid crystalline polyester resin formed by bonding a crystalline polyester polymerized segment and an amorphous polymerized segment, and the content of the amorphous polymerized segment in the hybrid crystalline polyester resin contained in the colorant-containing toner other than the colorant-containing toner containing a colorant having the lowest resistance is greater than the content of the amorphous polymerized segment in the crystalline polyester resin contained in the colorant-containing toner containing a colorant having the lowes
    Type: Application
    Filed: April 9, 2018
    Publication date: October 25, 2018
    Inventors: Natsuki Ito, Noboru Ueda, Kouji Sugama, Kenshi Miyajima, Yohei Ohno, Hidehito Haruki, Keisuke Asano
  • Publication number: 20180157186
    Abstract: An image forming method includes using yellow toner, magenta toner, cyan toner, and black toner in which each of the yellow toner, the magenta toner, the cyan toner, and the black toner includes a crystalline polyester resin having a constitutional unit derived from a linear chain aliphatic diol, an amorphous resin, a colorant, and a releasing agent. A carbon number of a linear chain aliphatic diol component forming the crystalline polyester resin contained in the black toner is 6 or more, and a carbon number of a linear chain aliphatic diol component forming the crystalline polyester resin contained in each of the yellow toner, the magenta toner, and the cyan toner is 3 or more and 5 or less.
    Type: Application
    Filed: November 22, 2017
    Publication date: June 7, 2018
    Inventors: Kenshi MIYAJIMA, Noboru Ueda, Kouji Sugama, Natsuki Ito, Yohei Ohino, Hidehito Haruki, Keisuke Asano
  • Publication number: 20180120719
    Abstract: An object of the present invention is to provide an electrostatic image developing toner containing toner mother particles, wherein the toner mother particle is formed by being provided with a plurality of convex portions on a toner mother particle precursor; the toner mother particle precursor contains a vinyl resin, a crystalline resin, and a mold release agent; the convex portion is formed with a hybrid amorphous polyester resin which is formed with a vinyl type polymerization segment and a polyester type polymerization segment both bonded together; and the hybrid amorphous polyester resin contains constituting units of a bisphenol A-propylene oxide adduct and a bisphenol A-ethylene oxide adduct.
    Type: Application
    Filed: October 18, 2017
    Publication date: May 3, 2018
    Inventors: Hidehito HARUKI, Kouji Sugama, Noboru Ueda
  • Patent number: 9740123
    Abstract: A toner for developing electrostatic latent images contains a particulate toner which at least includes a colorant, a binder resin, a mold release agent, and a crystalline polyester resin. The binder resin contains a styrene-acrylic resin. The toner has a storage modulus G?, a difference (X) between the maximum value and the minimum value of the storage modulus G?, and a difference (Y) between the maximum value and the minimum value of a loss modulus G? within the range of 140 to 180° C. satisfying relationships expressed by Conditional expressions (1) 1.0×102?G??1.0×103, (2) 0?X?3.0×102, and (3) 0?Y?6.0×102.
    Type: Grant
    Filed: March 4, 2016
    Date of Patent: August 22, 2017
    Assignee: KONICA MINOLTA, INC.
    Inventors: Junichi Furukawa, Shiro Hirano, Junya Onishi, Tatsuya Fujisaki, Hidehito Haruki
  • Patent number: 9588452
    Abstract: The toner according to the present invention comprises a matrix phase composed of a vinyl resin, and domain phases composed of a non-crystalline polyester resin dispersed in the matrix phase, and a number-average domain diameter of the domain phases composed of the non-crystalline polyester resin is 30 to 150 nm. The toner satisfies relation represented by a specific requirement of the total area of the domain phases present in a surface layer area of the toner particle, and the total area of the domain phases present in areas other than the surface layer area, in a given cross-section of the toner particle.
    Type: Grant
    Filed: September 4, 2015
    Date of Patent: March 7, 2017
    Assignee: KONICA MINOLTA, INC.
    Inventors: Tatsuya Fujisaki, Junya Onishi, Naoya Tonegawa, Shiro Hirano, Hidehito Haruki, Tatsuya Nagase
  • Publication number: 20160357122
    Abstract: Provided is an electrostatic charge image developing toner which is capable of forming high-quality images for a long time period. An electrostatic charge image developing toner, including at least a binder resin, a colorant, and a mold release agent, wherein a coefficient of variation of volume particle size distribution of the toner particles is 18% or less, and in a particle shape distribution analysis made using a flow type particle image analyzer, when an equivalent circle average particle diameter of the toner particles is designated as D (?m), an average aspect ratio of toner particles having an equivalent circle particle diameter in the range of (D?3) to (D?2) (?m) is designated as AR(L), and an average aspect ratio of toner particles having an equivalent circle particle diameter in the range of (D+3) to (D+4) (?m) is designated as AR(H), the relationship represented by the following Expression (1) is satisfied. [Expression 1] 0.110?AR(L)?AR(H)?0.
    Type: Application
    Filed: June 2, 2016
    Publication date: December 8, 2016
    Inventors: Junya ONISHI, Tatsuya FUJISAKI, Hidehito HARUKI, Junichi FURUKAWA, Shiro HIRANO
  • Publication number: 20160282736
    Abstract: A toner for developing electrostatic latent images contains a particulate toner which at least includes a colorant, a binder resin, a mold release agent, and a crystalline polyester resin. The binder resin contains a styrene-acrylic resin. The toner has a storage modulus G?, a difference (X) between the maximum value and the minimum value of the storage modulus G?, and a difference (Y) between the maximum value and the minimum value of a loss modulus G? within the range of 140 to 180° C. satisfying relationships expressed by Conditional expressions (1) 1.0×102?G??1.0×103, (2) 0?X?3.0×102, and (3) 0?Y?6.0×102.
    Type: Application
    Filed: March 4, 2016
    Publication date: September 29, 2016
    Inventors: Junichi FURUKAWA, Shiro HIRANO, Junya ONISHI, Tatsuya FUJISAKI, Hidehito HARUKI
  • Patent number: 9354536
    Abstract: A two-component developing agent for developing an electrostatic latent image includes toner particles composed of toner base particles and an exterior additive attached on the toner base particles, and carrier particles composed of carrier core particles and a coating resin provided on the carrier core particles. The coating resin includes a sulfur atom and a resin obtained by polymerizing an isobutyl methacrylate monomer, and the toner base particles include a sulfur atom.
    Type: Grant
    Filed: May 28, 2014
    Date of Patent: May 31, 2016
    Assignee: KONICA MINOLTA, INC.
    Inventors: Kosuke Nakamura, Yoshiyasu Matsumoto, Satoshi Uchino, Hidehito Haruki, Hiroyuki Kozuru
  • Publication number: 20160070188
    Abstract: The toner according to the present invention comprises a matrix phase composed of a vinyl resin, and domain phases composed of a non-crystalline polyester resin dispersed in the matrix phase, and a number-average domain diameter of the domain phases composed of the non-crystalline polyester resin is 30 to 150 nm. The toner satisfies relation represented by a specific requirement of the total area of the domain phases present in a surface layer area of the toner particle, and the total area of the domain phases present in areas other than the surface layer area, in a given cross-section of the toner particle.
    Type: Application
    Filed: September 4, 2015
    Publication date: March 10, 2016
    Inventors: Tatsuya FUJISAKI, Junya ONISHI, Naoya TONEGAWA, Shiro HIRANO, Hidehito HARUKI, Tatsuya NAGASE
  • Publication number: 20150378282
    Abstract: Provided is a transfer member having high durability, and an image forming apparatus which enables stable forming of an image with high image quality for a long period of time. The transfer member is an endless belt shape transfer member for constituting an image forming apparatus of an electrophotographic type, in which a surface layer is formed on a base and the surface layer comprises a cured (meth)acrylic resin which is obtained by curing of polyfunctional (meth)acrylate according to a polymerization reaction using a photopolymerization initiator comprising of an acylphosphine oxide compound represented by the following General Formula (1): [in General Formula (1), n and m each represents an integer of 1 to 2 (with the proviso that, the relationship of m+n=3 is satisfied), and X1 and X2 each represents an alkyl group, a phenyl group which may have a substituent group, or an alkoxy group].
    Type: Application
    Filed: June 29, 2015
    Publication date: December 31, 2015
    Inventors: Akihiro HONYA, Hidehito HARUKI
  • Publication number: 20150010862
    Abstract: According to one implementation, a two-component developer for developing an electrostatic latent image includes a toner particle and a carrier particle. The toner particle includes an external additive on a surface of a toner mother particle including at least a binding resin. The carrier particle includes a resin covering layer on a surface of a carrier core material particle. The resin covering layer includes a covering resin obtained by polymerizing at least an isobutyl methacrylate monomer and includes a nitrogen atom as an atom composing the covering resin.
    Type: Application
    Filed: July 3, 2014
    Publication date: January 8, 2015
    Inventors: Yoshiyasu MATSUMOTO, Kosuke NAKAMURA, Satoshi UCHINO, Hidehito HARUKI, Hiroyuki KOZURU
  • Publication number: 20140363762
    Abstract: A two-component developing agent for developing an electrostatic latent image includes toner particles composed of toner base particles and an exterior additive attached on the toner base particles, and carrier particles composed of carrier core particles and a coating resin provided on the carrier core particles. The coating resin includes a sulfur atom and a resin obtained by polymerizing an isobutyl methacrylate monomer, and the toner base particles include a sulfur atom.
    Type: Application
    Filed: May 28, 2014
    Publication date: December 11, 2014
    Applicant: Konica Minolta, Inc.
    Inventors: Kosuke NAKAMURA, Yoshiyasu MATSUMOTO, Satoshi UCHINO, Hidehito HARUKI, Hiroyuki KOZURU
  • Patent number: 8431294
    Abstract: Provided is an electrostatic charge image developing toner capable of reproducing color exhibiting high lightness and chroma, and obtaining a wide color reproduction range. Disclosed is the toner possessing a toner particle containing at least a binder resin and a colorant, wherein the colorant possesses a yellowish color nonfluorescent dye exhibiting a peak wavelength of an absorption spectrum being in a wavelength range of 400-480 nm, and a fluorescent dye exhibiting a peak wavelength of an emission spectrum being in a wavelength range of 480-560 nm, wherein the nonfluorescent dye has a content of 2-8 parts by weight, based on 100 parts by weight of the binder resin, and the fluorescent dye has a content of 0.05-0.2 parts by weight, based on 100 parts by weight of the resin, provided that a content ratio of the nonfluorescent dye to the fluorescent dye is 15-150.
    Type: Grant
    Filed: December 7, 2010
    Date of Patent: April 30, 2013
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Hidehito Haruki, Hiroyuki Yasukawa, Shinya Obara
  • Publication number: 20120094227
    Abstract: A toner for developing an electrostatic latent image is disclosed, the toner being composed of toner particles which comprises toner mother particles containing a binding resin having a hydrophilic polar group, a coloring agent and a releasing agent, and an external additive, wherein a mass of Na atoms in a neighborhood of surface of the toner particles measured by the measuring method described below is 50 to 750?g in 1 g of toner particles. Measuring Method (a) Extracting Na atoms in the neighborhood of surface of the toner particles by stirring the toner particles and dilute hydrochloric acid, (b) Preparing sample for measurement by filtering the liquid extracting Na atoms, and (c) Measuring the mass of Na atoms in the sample via Induction Coupling Plasma Optical Emission Spectrometer.
    Type: Application
    Filed: October 11, 2011
    Publication date: April 19, 2012
    Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.
    Inventors: Shinya OBARA, Masahiro ANNO, Satoshi UCHINO, Hidehito HARUKI
  • Publication number: 20110151367
    Abstract: Provided is an electrostatic charge image developing toner capable of reproducing color exhibiting high lightness and chroma, and obtaining a wide color reproduction range. Disclosed is the toner possessing a toner particle containing at least a binder resin and a colorant, wherein the colorant possesses a yellowish color nonfluorescent dye exhibiting a peak wavelength of an absorption spectrum being in a wavelength range of 400-480 nm, and a fluorescent dye exhibiting a peak wavelength of an emission spectrum being in a wavelength range of 480-560 nm, wherein the nonfluorescent dye has a content of 2-8 parts by weight, based on 100 parts by weight of the binder resin, and the fluorescent dye has a content of 0.05-0.2 parts by weight, based on 100 parts by weight of the resin, provided that a content ratio of the nonfluorescent dye to the fluorescent dye is 15-150.
    Type: Application
    Filed: December 7, 2010
    Publication date: June 23, 2011
    Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.
    Inventors: Hidehito HARUKI, Hiroyuki YASUKAWA, Shinya OBARA
  • Publication number: 20110151371
    Abstract: A toner for electrostatic latent image development is disclosed, comprising colored particles containing a binder resin and a colorant, and an external-additive, wherein the external additive comprises boron nitride particles exhibiting a number average primary particle size of 10 to 500 nm. The production method of the toner is also disclosed.
    Type: Application
    Filed: December 3, 2010
    Publication date: June 23, 2011
    Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.
    Inventors: Shinya OBARA, Masahiro ANNO, Satoshi UCHINO, Hitomi MOTANI, Hidehito HARUKI
  • Publication number: 20100159383
    Abstract: The method for manufacturing a color print by an electrophotographic image forming process employs forming toner images by non-contact developing electrostatic latent images on electrostatic latent image holding members in developing devices. For each color, cyan, magenta and yellow, there is a separate electrostatic latent image, a separate electrostatic latent image holding member and a separate developing device. In each developing device the holding member is arranged in a non-contact position with respect to the electrostatic latent image holding member at a development portion. The non-contact developing is carried out by flying the toner from the toner holding member to the electrostatic latent image holding member. The cyan toner exhibits a maximum chroma at lightness L*C of from 53-70.
    Type: Application
    Filed: December 17, 2009
    Publication date: June 24, 2010
    Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.
    Inventors: Shinya OBARA, Shiro HIRANO, Natsuko KUSAKA, Hidehito HARUKI