Patents by Inventor Junji Ujihara

Junji Ujihara 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).

  • Publication number: 20220040980
    Abstract: There is provided a method for cleaning an ink discharger of an inkjet head, and the method includes causing dry ice particles to collide with an ink discharge port of an inkjet head.
    Type: Application
    Filed: July 29, 2021
    Publication date: February 10, 2022
    Inventors: Junji UJIHARA, Yasuharu SAITA
  • Publication number: 20220009235
    Abstract: There is provided a cleaning method of a flow path in an inkjet head, including: introducing cleaning liquid into the flow path in the inkjet head; and introducing gas into the flow path in the inkjet head, wherein bubbles made of the gas are generated in the cleaning liquid introduced into the flow path.
    Type: Application
    Filed: June 21, 2021
    Publication date: January 13, 2022
    Inventors: Junji UJIHARA, Yasuharu SAITA
  • Publication number: 20200230948
    Abstract: Provided is a multilayer endless belt containing a base material layer having thereon an elastic layer in that order from an inner side of the multilayer endless belt, wherein in a width direction of the multilayer endless belt, an average thickness of both end regions of the base material layer is in the range of 120 to 150% with respect to an average thickness of a central region of the base material layer, and an average thickness of both end regions of the elastic layer is thinner than an average thickness of a central region of the elastic layer.
    Type: Application
    Filed: November 13, 2019
    Publication date: July 23, 2020
    Inventors: Junji Ujihara, Tsuyoshi Shimoda, Takayuki Suzuki, Hirofumi Koga
  • Patent number: 10527975
    Abstract: A method for manufacturing an intermediate transfer belt having at least a base layer and a surface layer formed in contact with a surface of the base layer, includes: irradiating a surface of the base layer with a laser such that Rz (in accordance with JIS-B0601-2001) is 0.2 ?m or more and equal to or less than a half of a film thickness of a surface layer to be formed; and forming a surface layer on the surface of the base layer irradiated with the laser.
    Type: Grant
    Filed: January 7, 2019
    Date of Patent: January 7, 2020
    Assignee: KONICA MINOLTA, INC.
    Inventors: Takayuki Suzuki, Junji Ujihara, Tsuyoshi Shimoda
  • Publication number: 20190275710
    Abstract: The present invention provides a means for improving peeling durability of a tubular article to be produced and properties thereof at the time of use while having high productivity in a method for producing a tubular article. The present invention relates to the method for producing a tubular article including: continuously coating at least two coating solutions for forming a polyimide resin layer to form a stacked coating film, the two coating solutions each including a solvent-soluble polyimide; and a solvent having a vapor pressure at 25° C. of 10 kPa or more and 19 kPa or less.
    Type: Application
    Filed: February 5, 2019
    Publication date: September 12, 2019
    Inventors: Junji UJIHARA, Tsuyoshi SHIMODA, Takayuki SUZUKI
  • Publication number: 20190227462
    Abstract: A method for manufacturing an intermediate transfer belt having at least a base layer and a surface layer formed in contact with a surface of the base layer, includes: irradiating a surface of the base layer with a laser such that Rz (in accordance with JIS-B0601-2001) is 0.2 ?m or more and equal to or less than a half of a film thickness of a surface layer to be formed; and forming a surface layer on the surface of the base layer irradiated with the laser.
    Type: Application
    Filed: January 7, 2019
    Publication date: July 25, 2019
    Inventors: Takayuki SUZUKI, Junji UJIHARA, Tsuyoshi SHIMODA
  • Publication number: 20190076873
    Abstract: A manufacturing method for an intermediate transfer belt to manufacture an intermediate transfer belt including at least a base material and a surface layer, includes: forming a surface layer by applying application liquid to an outer peripheral surface of the base material by using a plurality of nozzles while the base material is being rotated, the application liquid having a viscosity within a range of 0.5 to 10 mPa·s at 20° C., wherein, as for the nozzles used in the surface layer forming step, a flow rate per nozzle is set within a range of 3 to 10 mL/min, and a ratio value (m/L) between a nozzle inner diameter (m) and a center-to-center distance between nozzles (L) is set in a range of 0.05 to 0.10.
    Type: Application
    Filed: August 28, 2018
    Publication date: March 14, 2019
    Inventors: Tsuyoshi SHIMODA, Junji UJIHARA, Takayuki SUZUKI
  • Patent number: 9931793
    Abstract: An endless-belt shaped heating element is produced by: dispersing annealed stainless-steel fibers in the heat-resistant resin or a precursor thereof; and, producing a molded article of the heat-resistant resin in which the annealed stainless-steel fibers are dispersed.
    Type: Grant
    Filed: May 13, 2016
    Date of Patent: April 3, 2018
    Assignee: KONICA MINOLTA, INC.
    Inventors: Izumi Mukoyama, Junji Ujihara
  • Publication number: 20160250811
    Abstract: An endless-belt shaped heating element is produced by: dispersing annealed stainless-steel fibers in the heat-resistant resin or a precursor thereof; and, producing a molded article of the heat-resistant resin in which the annealed stainless-steel fibers are dispersed.
    Type: Application
    Filed: May 13, 2016
    Publication date: September 1, 2016
    Inventors: Izumi MUKOYAMA, Junji UJIHARA
  • Publication number: 20160158799
    Abstract: The process of the present invention for producing an intermediate transfer belt is a process for producing an intermediate transfer belt of an electrophotographic image forming apparatus. The intermediate transfer belt has a surface layer composed of a cured resin on a substrate layer composed of polyphenylene sulfide resin. A coating film formed by coating a surface of the substrate layer with a curing composition containing a polymerizable component is irradiated with curing light including light with a specific wavelength emitted from an LED light source, to form the surface layer composed of the cured resin by polymerization of the polymerizable component.
    Type: Application
    Filed: December 3, 2015
    Publication date: June 9, 2016
    Inventors: Tsuyoshi SHIMODA, Junji Ujihara, Takayuki Suzuki, Ryuji Kitani
  • Publication number: 20160091847
    Abstract: An endless-belt shaped heating element made of a heat resisting resin in which stainless-steel fibers subjected to annealing treatment is dispersed is prepared. The heating element is adopted as a heating belt of a fixing device of an image forming apparatus.
    Type: Application
    Filed: September 18, 2015
    Publication date: March 31, 2016
    Inventors: Izumi MUKOYAMA, Junji UJIHARA
  • Patent number: 8822891
    Abstract: A sheet heater that includes a sheet article composed of a conductive resin composition containing a conductive material and a resin, and a pair of metal plate electrodes, each of the electrodes being bonded to each of the ends of the sheet article, wherein when elements of the sheet article are detected at a portion 1 ?m depth from a surface of the metal plate electrode, a peak area ratio of silicon (Si) to metal ion (M) is 1/100 to 1, the metal ion M being most abundant of all metal ions detected at the portion, the peaks being obtained by measuring an X ray generated at the portion by applying an X ray to the portion with the scanning electron microscope-energy dispersive X-ray spectrometer.
    Type: Grant
    Filed: August 14, 2013
    Date of Patent: September 2, 2014
    Assignee: Konica Minolta, Inc.
    Inventors: Susumu Sudo, Eiichi Yoshida, Izumi Mukoyama, Junji Ujihara
  • Publication number: 20140061181
    Abstract: A sheet heater that includes a sheet article composed of a conductive resin composition containing a conductive material and a resin, and a pair of metal plate electrodes, each of the electrodes being bonded to each of the ends of the sheet article, wherein when elements of the sheet article are detected at a portion 1 ?m depth from a surface of the metal plate electrode, a peak area ratio of silicon (Si) to metal ion (M) is 1/100 to 1, the metal ion M being most abundant of all metal ions detected at the portion, the peaks being obtained by measuring an X ray generated at the portion by applying an X ray to the portion with the scanning electron microscope-energy dispersive X-ray spectrometer.
    Type: Application
    Filed: August 14, 2013
    Publication date: March 6, 2014
    Applicant: Konica Minolta, Inc.
    Inventors: Susumu SUDO, Eiichi YOSHIDA, Izumi MUKOYAMA, Junji UJIHARA
  • Publication number: 20130149439
    Abstract: The method of forming an electrode in a heat generating fixing belt entails supplying a colloid liquid where metal nano-particles are dispersed in a liquid medium, on the surface of an electrically resistant heat generating layer and forming a plated film by an electroless plating method using the metal nano-particles as a catalyst. The electrically resistant heat generating layer is composed of a resin. In this manner, a pair of electrodes are formed on the surface of the electrically resistant heat generating layer. The electrodes supply electric current to the electrically resistant heat generating layer. The heat generating fixing belt can maintain an initial conduction resistance for a long period of time.
    Type: Application
    Filed: December 4, 2012
    Publication date: June 13, 2013
    Inventors: Junji UJIHARA, Eiichi YOSHIDA
  • Patent number: 8177604
    Abstract: A surface abrading method of an electrophotographic photoreceptor is disclosed, comprising abrading the surface of a photosensitive layer with an abrading member entrained about a backup roll with feeding the abrading member and rotating the photoreceptor, while moving the abrading member parallel to a rotating shaft of the photoreceptor with bringing the abrading member into contact with the photosensitive layer surface, wherein the abrading member comprises a solid body on a backing material, the solid body contains abrasive grains and is provided on the backing material brought into contact with the photosensitive layer surface, and the top face of the solid body exhibits a surface roughness (Ry) of from 4.0 to 8.0 ?m.
    Type: Grant
    Filed: January 20, 2010
    Date of Patent: May 15, 2012
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Junji Ujihara, Hirohiko Seki, Nobuaki Kobayashi, Tadaaki Sumitani
  • Publication number: 20120064350
    Abstract: An intermediate transfer belt for use in an image forming apparatus of an electro-photographing type, includes a substrate; and a surface-cured layer provided on the substrate; wherein the surface-cured layer contains a reaction product of at least an active energy ray curable monomer, reactive metal oxide particles, and a graft copolymer of a polymerizable fluorine resin and a polymerizable siloxane.
    Type: Application
    Filed: August 30, 2011
    Publication date: March 15, 2012
    Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.
    Inventors: Akihiro HONYA, Toshio TOKUYASU, Junji UJIHARA, Tadaaki SUMITANI
  • Publication number: 20100197200
    Abstract: A surface abrading method of an electrophotographic photoreceptor is disclosed, comprising abrading the surface of a photosensitive layer with an abrading member entrained about a backup roll with feeding the abrading member and rotating the photoreceptor, while moving the abrading member parallel to a rotating shaft of the photoreceptor with bringing the abrading member into contact with the photosensitive layer surface, wherein the abrading member comprises a solid body on a backing material, the solid body contains abrasive grains and is provided on the backing material brought into contact with the photosensitive layer surface, and the top face of the solid body exhibits a surface roughness (Ry) of from 4.0 to 8.0 ?m.
    Type: Application
    Filed: January 20, 2010
    Publication date: August 5, 2010
    Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.
    Inventors: Junji UJIHARA, Hirohiko SEKI, Nobuaki KOBAYASHI, Tadaaki SUMITANI
  • Patent number: 7282313
    Abstract: Disclosed is a production method of an electrophotographic toner, which comprises toner particles comprising a resin and a colorant. The method comprises a step of forming toner particles in an aqueous medium, and processing an aqueous medium containing the toner particles or a component of the toner particles by gas bubbles.
    Type: Grant
    Filed: August 23, 2004
    Date of Patent: October 16, 2007
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Akira Ohira, Junji Ujihara, Shoichiro Ishibashi, Kentarou Yamawaki
  • Publication number: 20050089784
    Abstract: Disclosed is a production method of an electrophotographic toner, which comprises toner particles comprising a resin and a colorant. The method comprises a step of forming toner particles in an aqueous medium, and processing an aqueous medium containing the toner particles or a component of the toner particles by gas bubbles.
    Type: Application
    Filed: August 23, 2004
    Publication date: April 28, 2005
    Inventors: Akira Ohira, Junji Ujihara, Shoichiro Ishibashi, Kentarou Yamawaki
  • Patent number: 6410093
    Abstract: A coating method of coating an outer circumferential surface of a cylindrical base with a coater having a supply port, a coating solution chamber, and a slit communicating with the coating solution chamber, the slit being provided around an inner circumferential surface of the coater, comprisse steps of: feeding a coating solution from the supply port to the coating solution chamber so that the coating solution is discharged to the slit; adjusting an absolute pressure P in the coating solution chamber so as to satisfy the following formula: 3×104≦P≦3×106 (mmH2O) and relatively moving the cylindrical base through a hole formed by the inner circumferential surface of the coater so that an outer circumferential surface of the cylindrical base is uniformely coated with the coating solution flowing out from the slit.
    Type: Grant
    Filed: December 31, 1998
    Date of Patent: June 25, 2002
    Assignee: Konica Corporation
    Inventors: Akira Ohira, Junji Ujihara, Nobuaki Kobayashi, Masao Asano