Patents by Inventor Haruo Horiguchi

Haruo Horiguchi 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: 10663902
    Abstract: There is disclosed an image post-processing method for adjusting glossiness of a fixed toner image. The image post-processing method includes a glossiness control step of, with a non-contact heating device, heating a toner image fixed to a recording medium so as to reduce glossiness of the toner image. The non-contact heating device is configured to heat the toner image fixed to the recording medium to a temperature which reduces the glossiness of the fixed toner image.
    Type: Grant
    Filed: November 9, 2018
    Date of Patent: May 26, 2020
    Assignee: KONICA MINOLTA, INC.
    Inventors: Haruo Horiguchi, Seijiro Takahashi, Toyoko Shibata
  • Publication number: 20200103779
    Abstract: An image forming method includes: developing an electrostatic latent image with a toner to form a toner image; and transferring the toner image onto a recording medium and irradiating the toner image with an actinic ray to fix the toner image to the recording medium, wherein in the transferring, a plurality of types of toner particles containing toner particles of a color toner and toner particles of a transparent toner is fixed to the same area included in the recording medium.
    Type: Application
    Filed: August 27, 2019
    Publication date: April 2, 2020
    Inventors: Seijiro TAKAHASHI, Kouji Sugama, Haruo Horiguchi, Yukiko Kusano, Toyoko Shibata
  • Publication number: 20200073268
    Abstract: Provided is an image forming method for forming an image including a recording medium and a layer containing a photosoftening compound disposed thereon, the image forming method containing the steps of: supplying a powder for adhering the powder to the image; and irradiating the image with light to melt or to soften the image.
    Type: Application
    Filed: June 21, 2019
    Publication date: March 5, 2020
    Inventors: Haruo Horiguchi, Michiyo Fujita, Makoto Nomiya, Seijiro Takahashi
  • Publication number: 20200073269
    Abstract: A toner includes toner particles, wherein the toner particles contain a polymer containing a structural unit derived from an azobenzene derivative having a polymerizable group.
    Type: Application
    Filed: July 9, 2019
    Publication date: March 5, 2020
    Inventors: Seijiro TAKAHASHI, Haruo HORIGUCHI, Toyoko SHIBATA
  • Publication number: 20200050122
    Abstract: Provided is an image recording composition used for an electrostatic image developing toner or an ink-jet ink, containing a photoisomerization compound which is a stilbene derivative having a structure represented by Formula (1), wherein R1 represents an electron donating group; R2 represents an electron withdrawing group; R3 to R10 each independently represent a hydrogen atom or an alkyl group which may have a branch, provided that at least one of R3 to R10 represents an alkyl group which may have a branch.
    Type: Application
    Filed: June 3, 2019
    Publication date: February 13, 2020
    Inventors: Toyoko SHIBATA, Seijiro TAKAHASHI, Haruo HORIGUCHI
  • Patent number: 10551760
    Abstract: Provided is an image recording composition used for an electrostatic image developing toner or an ink-jet ink, containing a photoisomerization compound which is a stilbene derivative having a structure represented by Formula (1), wherein R1 represents an electron donating group; R2 represents an electron withdrawing group; R3 to R10 each independently represent a hydrogen atom or an alkyl group which may have a branch, provided that at least one of R3 to R10 represents an alkyl group which may have a branch.
    Type: Grant
    Filed: June 3, 2019
    Date of Patent: February 4, 2020
    Assignee: KONICA MINOLTA, INC.
    Inventors: Toyoko Shibata, Seijiro Takahashi, Haruo Horiguchi
  • Patent number: 10481528
    Abstract: An object of the present invention is achieved by an image forming method containing the steps of: forming a toner image by developing an electrostatic latent image with a toner; transferring the toner image on a recording medium; and fixing the toner image on the recording medium, wherein the fixing step of the toner image on the recording medium further contains the steps of: irradiating light having a wavelength range of 280 to 480 nm to the toner image; and applying pressure to the toner image.
    Type: Grant
    Filed: July 5, 2018
    Date of Patent: November 19, 2019
    Assignee: KONICA MINOLTA, INC.
    Inventors: Seijiro Takahashi, Haruo Horiguchi, Toyoko Shibata
  • Patent number: 10437175
    Abstract: An image forming method uses a toner including toner particles including a binder resin and an ultraviolet light absorber. Content of the ultraviolet light absorber is within a range of 0.1 to 50 mass % with respect to total mass of the toner particles. The method includes: transferring a toner image formed with the toner on a recording medium; and irradiating the toner image transferred on the recording medium with monochromatic light having a maximum emission wavelength within a wavelength range of 280 to 550 nm to melt and fix the toner image.
    Type: Grant
    Filed: July 5, 2018
    Date of Patent: October 8, 2019
    Assignee: KONICA MINOLTA, INC.
    Inventors: Haruo Horiguchi, Seijiro Takahashi
  • Publication number: 20190187606
    Abstract: There is disclosed an image post-processing method for adjusting glossiness of a fixed toner image. The method includes a glossiness control step and a temperature control step. The glossiness control step is a step of, to a toner image formed of a toner containing a light absorbing compound and fixed to a recording medium, emitting glossiness control light so as to reduce or increase glossiness of the toner image. The temperature control step is a step of heating the toner image immediately before the light is emitted to the toner image such that the toner image has a surface temperature which is at least 20° C. lower than a softening temperature of the toner. The glossiness control light has a maximum emission wavelength in a wavelength range in which the compound absorbs light and is made to at least reduce the glossiness of the toner image.
    Type: Application
    Filed: November 9, 2018
    Publication date: June 20, 2019
    Inventors: Haruo Horiguchi, Seijiro Takahashi, Toyoko Shibata
  • Patent number: 10324386
    Abstract: An object of the present invention is achieved by an electrophotographic photoreceptor containing a conductive support sequentially laminated thereon with at least a photosensitive layer and a protective layer in that order, wherein the protective layer includes a cured composition having a radical polymerizable compound for a binder, a charge transport agent having a radical polymerizable functional group, and a photopolymerization initiator; the charge transport agent having a radical polymerizable functional group has a maximum absorption wavelength in the range of 405±50 nm; and the charge transport agent having a radical polymerizable functional group and the photopolymerization initiator satisfy Formula (A), ?G=Eox(D/D+)?Ered(A?/A)?E*??0.2 (eV).
    Type: Grant
    Filed: January 31, 2018
    Date of Patent: June 18, 2019
    Assignee: KONICA MINOLTA, INC.
    Inventors: Toshiyuki Fujita, Haruo Horiguchi
  • Publication number: 20190171155
    Abstract: Provided is an image post-processing method for controlling a glossiness of a fixed toner image, the method including a glossiness control step of: irradiating the fixed toner image formed with a toner containing a compound that absorbs light and fixed on a recording medium with a glossiness control light that is capable of at least reducing a glossiness of the fixed toner image, wherein the glossiness control light has a maximum emission wavelength in a wavelength region which is absorbed by the compound.
    Type: Application
    Filed: November 9, 2018
    Publication date: June 6, 2019
    Inventors: Haruo HORIGUCHI, Seijiro TAKAHASHI, Toyoko SHIBATA
  • Publication number: 20190171148
    Abstract: There is disclosed an image post-processing method for adjusting glossiness of a fixed toner image. The image post-processing method includes a glossiness control step of, with a non-contact heating device, heating a toner image fixed to a recording medium so as to reduce glossiness of the toner image. The non-contact heating device is configured to heat the toner image fixed to the recording medium to a temperature which reduces the glossiness of the fixed toner image.
    Type: Application
    Filed: November 9, 2018
    Publication date: June 6, 2019
    Inventors: Haruo HORIGUCHI, Seijiro TAKAHASHI, Toyoko SHIBATA
  • Patent number: 10203615
    Abstract: An electrophotographic photoreceptor according to the present invention includes a conductive support, a photosensitive layer, and a protective layer disposed in sequence. The protective layer includes a cured product of a composition containing a radically polymerizable compound, a charge transporting material exhibiting a maximal absorption wavelength of 405±50 nm, and a photopolymerization initiator of a single-molecule system; and a following Expression (A) is satisfied: G=Eox(D/D+)?Ered(A?/A)?E*??0.2 [eV]??Expression (A): G represents a free energy change, Eox(D/D+) represents an oxidation potential of the charge transporting material, Ered(A?/A) represents a reduction potential of the photopolymerization initiator, and E* represents an excitation energy of the charge transporting material.
    Type: Grant
    Filed: December 11, 2017
    Date of Patent: February 12, 2019
    Assignee: KONICA MINOLTA, INC.
    Inventors: Haruo Horiguchi, Toshiyuki Fujita, Tomohiro Oshiyama
  • Publication number: 20190011857
    Abstract: An image forming method uses a toner including toner particles including a binder resin and an ultraviolet light absorber. Content of the ultraviolet light absorber is within a range of 0.1 to 50 mass % with respect to total mass of the toner particles. The method includes: transferring a toner image formed with the toner on a recording medium; and irradiating the toner image transferred on the recording medium with monochromatic light having a maximum emission wavelength within a wavelength range of 280 to 550 nm to melt and fix the toner image.
    Type: Application
    Filed: July 5, 2018
    Publication date: January 10, 2019
    Inventors: Haruo HORIGUCHI, Seijiro Takahashi
  • Publication number: 20190011858
    Abstract: An object of the present invention is achieved by an image forming method containing the steps of: forming a toner image by developing an electrostatic latent image with a toner; transferring the toner image on a recording medium; and fixing the toner image on the recording medium, wherein the fixing step of the toner image on the recording medium further contains the steps of: irradiating light having a wavelength range of 280 to 480 nm to the toner image; and applying pressure to the toner image.
    Type: Application
    Filed: July 5, 2018
    Publication date: January 10, 2019
    Inventors: Seijiro Takahashi, Haruo Horiguchi, Toyoko Shibata
  • Patent number: 10073365
    Abstract: Provided is an electrophotographic photoreceptor including a conductive support, a photosensitive layer, and a surface protective layer disposed in sequence. The surface protective layer includes a cured product of a composition containing a polymerizable compound, a charge transporting material, and at least two polymerization initiators. The polymerization initiators include an acyl phosphine oxide and an O-acyl oxime.
    Type: Grant
    Filed: June 28, 2017
    Date of Patent: September 11, 2018
    Assignee: KONICA MINOLTA, INC.
    Inventors: Mari Ueda, Toshiyuki Fujita, Haruo Horiguchi
  • Publication number: 20180224761
    Abstract: An object of the present invention is achieved by an electrophotographic photoreceptor containing a conductive support sequentially laminated thereon with at least a photosensitive layer and a protective layer in that order, wherein the protective layer includes a cured composition having a radical polymerizable compound for a binder, a charge transport agent having a radical polymerizable functional group, and a photopolymerization initiator; the charge transport agent having a radical polymerizable functional group has a maximum absorption wavelength in the range of 405±50 nm; and the charge transport agent having a radical polymerizable functional group and the photopolymerization initiator satisfy Formula (A), ?G=Eox(D/D+)?Ered(A?/A)?E*??0.2(eV).
    Type: Application
    Filed: January 31, 2018
    Publication date: August 9, 2018
    Inventors: Toshiyuki Fujita, Haruo Horiguchi
  • Publication number: 20180173120
    Abstract: An electrophotographic photoreceptor according to the present invention includes a conductive support, a photosensitive layer, and a protective layer disposed in sequence. The protective layer includes a cured product of a composition containing a radically polymerizable compound, a charge transporting material exhibiting a maximal absorption wavelength of 405±50 nm, and a photopolymerization initiator of a single-molecule system; and a following Expression (A) is satisfied: G=Eox(D/D+)?Ered(A?/A)?E*??0.2 [eV]??Expression (A): G represents a free energy change, Eox(D/D+) represents an oxidation potential of the charge transporting material, Ered(A?/A) represents a reduction potential of the photopolymerization initiator, and E* represents an excitation energy of the charge transporting material.
    Type: Application
    Filed: December 11, 2017
    Publication date: June 21, 2018
    Inventors: Haruo Horiguchi, Toshiyuki Fujita, Tomohiro Oshiyama
  • Publication number: 20180095404
    Abstract: An electrophotographic photoconductor (photoconductor) according to the embodiment includes a conductive support, a photosensitive layer, and a protective layer. The protective layer is composed of a cured product as one body obtained by a radical reaction of a composition containing a radical polymerizable monomer having a radical polymerizable functional group, a metal oxide fine particle having a radical polymerizable functional group, and camphorquinone or a derivative thereof. The photoconductor is installed in an image forming apparatus equipped with a cleaning device for removing transfer residual toner on the photoconductor, and the cleaning device includes an elastic cleaning member disposed so that it can come into contact with the surface of the photoconductor.
    Type: Application
    Filed: October 4, 2017
    Publication date: April 5, 2018
    Inventors: Toshiyuki FUJITA, Mari UEDA, Haruo HORIGUCHI
  • Publication number: 20180024450
    Abstract: Provided is an electrophotographic photoreceptor including a conductive support, a photosensitive layer, and a surface protective layer disposed in sequence. The surface protective layer includes a cured product of a composition containing a polymerizable compound, a charge transporting material, and at least two polymerization initiators. The polymerization initiators include an acyl phosphine oxide and an O-acyl oxime.
    Type: Application
    Filed: June 28, 2017
    Publication date: January 25, 2018
    Inventors: Mari UEDA, Toshiyuki Fujita, Haruo Horiguchi