Patents by Inventor Naohiro Toda

Naohiro Toda 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: 20150258783
    Abstract: An inkjet recording method includes ejecting an ink having a temperature from 28° C. to 40° C. and attaching the ink to a non-porous substrate having a temperature 5° C. to 20° C. higher than that of the ink, wherein the ink contains a colorant, resin particles, water, a hydrosoluble organic solvent, and a silicone-based surfactant, wherein the silicone-based surfactant accounts for 1% by weight to 3% by weight in the ink.
    Type: Application
    Filed: March 12, 2015
    Publication date: September 17, 2015
    Applicant: RICOH COMPANY, LTD.
    Inventors: Naohiro Toda, Hidefumi Nagashima, Tomohiro Nakagawa, Juichi Furukawa, Ichiroh Fujii
  • Publication number: 20150259553
    Abstract: An ink contains water, a hydrosoluble organic solvent, a colorant, a resin A; and a resin B, wherein the content of the resin B is from 0.5% by weight to less than 10% by weight to the content of the resin A and the resin B has a minimum film-forming temperature at least 30° C. lower than that of the resin A.
    Type: Application
    Filed: March 10, 2015
    Publication date: September 17, 2015
    Applicant: RICOH COMPANY, LTD.
    Inventors: Tomohiro NAKAGAWA, Naohiro Toda, Hidefumi Nagashima, Juichi Furukawa, Hikaru Kobayashi
  • Patent number: 9122183
    Abstract: An electrophotographic photoreceptor, including an electroconductive substrate; a photosensitive layer overlying the electroconductive substrate; and a surface layer overlying the photosensitive layer, wherein the surface layer includes a resin having no charge transportability; and an inorganic particulate material, wherein the inorganic particulate material is a zinc oxide doped with a boron group, and wherein the electrophotographic photoreceptor has a surface specific resistivity (R1) not less than 1013 ?/cm2 when the surface layer has an electric field intensity of 1×104 V/cm, and a ratio (R1/R15) of the surface specific resistivity (R1) to a surface specific resistivity (R15) when the surface layer has an electric field intensity of 1.5×105 V/cm of from 100 to 5,000.
    Type: Grant
    Filed: March 5, 2013
    Date of Patent: September 1, 2015
    Assignee: Ricoh Company, Ltd.
    Inventors: Tetsuya Toshine, Hiroshi Ikuno, Naohiro Toda, Takafumi Iwamoto, Kazuhiro Egawa, Toshihiro Ishida
  • Patent number: 9108439
    Abstract: A method of forming an image includes a step of heating a nonporous substrate to a temperature in a range of from 30° C. to 80° C.; and a step of forming an image on the nonporous substrate by applying water-based inks of at least two colors to the nonporous substrate employing an ink jet technique, wherein an ink set that contains water-based inks each containing a coloring material, an emulsion resin, water, and a water-soluble solvent is used to apply the water-based inks of the at least two colors, and, of the water-based inks in the ink set, at least one water-based ink has a minimum film-forming temperature different from those of water-based inks of other colors.
    Type: Grant
    Filed: March 11, 2014
    Date of Patent: August 18, 2015
    Assignee: RICOH COMPANY, LTD.
    Inventors: Naohiro Toda, Hidefumi Nagashima, Tomohiro Nakagawa
  • Patent number: 9084305
    Abstract: A lighting system includes a lighting load and a lighting control device. The lighting control device is configured to adjust a light output of the lighting load to a first light output corresponding to a first correlated color temperature and a first illuminance in a first time slot, and to decrease the light output of the lighting load up to a second light output corresponding to a second correlated color temperature and a second illuminance with the passage of time in a second time slot after the first time slot.
    Type: Grant
    Filed: February 6, 2013
    Date of Patent: July 14, 2015
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Naohiro Toda, Hiroki Noguchi, Tadashi Nishimura, Shinsuke Nishioka, Toshikazu Kawashima
  • Publication number: 20150191614
    Abstract: An aqueous ink for inkjet includes water, at least one hydrosoluble organic solvent each having a boiling point of 250° C. or lower; vinyl polymer particles containing a pigment, and polycarbonate-based urethane resin particles, wherein the aqueous ink for inkjet is used for an inkjet recording system including a heating step.
    Type: Application
    Filed: January 5, 2015
    Publication date: July 9, 2015
    Applicant: RICOH COMPANY, LTD.
    Inventors: Hidefumi Nagashima, Naohiro Toda, Tomohiro Nakagawa, Juichi Furukawa, Ichiroh Fujii
  • Publication number: 20150165787
    Abstract: An inkjet recording method includes recording an image on a heated nonpermeable substrate with an aqueous ink by an inkjet method; and drying the aqueous ink, wherein the method satisfies the following requirements (1) to (3): (1) the aqueous ink comprises water, a hydrosoluble organic solvent, a pigment and a particulate resin, wherein the hydrosoluble organic solvent comprises a solvent having a boiling point not higher than 200° C. in an amount not less than 50% by weight; (2) the hydrosoluble organic solvent having a boiling point not higher than 200° C. comprises 3-methoxy-3-methyl-1-butanol; and (3) a difference of heating temperatures between the recording and the drying is from 25 to 80° C.
    Type: Application
    Filed: December 4, 2014
    Publication date: June 18, 2015
    Applicant: RICOH COMPANY, LTD.
    Inventors: Ichiroh Fujii, Naohiro Toda, Tomohiro Nakagawa, Hidefumi Nagashima, Juichi Furukawa
  • Patent number: 9041277
    Abstract: A lighting device includes an LED light source that emits light having a first peak wavelength at 430 to 460 nm and a second peak wavelength at 530 to 570 nm.
    Type: Grant
    Filed: April 23, 2013
    Date of Patent: May 26, 2015
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Naohiro Toda, Shin Ukegawa, Makoto Yamada, Takashi Saito, Shinichi Aoki, Hiroki Noguchi, Masaki Ishiwata, Sayaka Nishi, Ayako Tsukitani
  • Publication number: 20150138284
    Abstract: An inkjet ink including: water; a water-soluble organic solvent; a pigment; polycarbonate modified urethane resin particles; an ultraviolet absorber; and a light stabilizer.
    Type: Application
    Filed: November 14, 2014
    Publication date: May 21, 2015
    Applicant: RICOH COMPANY, LTD.
    Inventors: Hidefumi Nagashima, Naohiro Toda, Tomohiro Nakagawa, Juichi Furukawa, Ichiroh Fujii
  • Publication number: 20150116433
    Abstract: An aqueous ink for inkjet includes water; a hydrosoluble organic solvent; a pigment; and a particulate resin. The hydrosoluble organic solvent includes 2,3-butanediol and 1,2-propanediol at a weight ratio (2,3-butanediol/1,2-propanediol) of from 98/2 to 60/40.
    Type: Application
    Filed: October 3, 2014
    Publication date: April 30, 2015
    Applicant: RICOH COMPANY, LTD.
    Inventors: Ichiroh Fujii, Naohiro TODA, Tomohiro NAKAGAWA, Hidefumi NAGASHIMA, Juichi FURUKAWA
  • Patent number: 8988014
    Abstract: A wake-up system includes an illumination apparatus and an interface apparatus. A wake-up time is input to the interface apparatus. The illumination apparatus varies output and color temperature of wake-up light that it irradiates. The output of the irradiated wake-up light is increased from a wake-up operation start time to the wake-up time. Color temperature of the wake-up light is controlled to become higher in one period than in another period between the wake-up operation start time to the wake-up time.
    Type: Grant
    Filed: April 21, 2010
    Date of Patent: March 24, 2015
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Naohiro Toda, Hiroki Noguchi
  • Publication number: 20150077479
    Abstract: Aqueous ink for inkjet that contains water; a hydrosoluble organic solvent; a pigment; and a resin, wherein the hydrosoluble organic solvent comprises 2,3-butane diol having a total ratio of (2R, 3R) form and (2S, 3S) form of greater than 50% by weight in 2,3-butane diol, where (2R, 3R) form represents (2R, 3R)-(?)-2,3-butane diol and (2S, 3S) form represents (2S, 3S)-(+)-2,3-butane diol, wherein 2,3-butane diol accounts for 5% by weight to 40% by weight of the entire of the aqueous ink.
    Type: Application
    Filed: August 29, 2014
    Publication date: March 19, 2015
    Applicant: RICOH COMPANY, LTD.
    Inventors: Tomohiro NAKAGAWA, Naohiro TODA, Hidefumi NAGASHIMA, Juichi FURUKAWA, Ichiroh FUJII
  • Publication number: 20150077482
    Abstract: Aqueous ink for inkjet contains water; a hydrosoluble organic solvent; a pigment; and a resin, wherein the hydrosoluble organic solvent contains 2,3-butane diol having meso-2,3-butane diol in an amount of 50% by weight or more in 2,3-butane diol and 2,3-butane diol accounts for 5% by weight to 40% by weight of the entire of the aqueous ink.
    Type: Application
    Filed: September 10, 2014
    Publication date: March 19, 2015
    Applicant: RICOH COMPANY, LTD.
    Inventors: Naohiro Toda, Tomohiro Nakagawa, Hidefumi Nagashima, Juichi Furukawa, Ichiroh Fujii, Kiyofumi Nagai
  • Publication number: 20150050467
    Abstract: Ink for aqueous inkjet recording contains water, a hydrosoluble organic solvent; a pigment; and an acrylic-modified polycarbonate-based urethane resin that contains at least one of an acrylic monomer, a methacrylic monomer, and an alkylester thereof as components.
    Type: Application
    Filed: July 31, 2014
    Publication date: February 19, 2015
    Applicant: RICOH COMPANY, LTD.
    Inventors: Tomohiro Nakagawa, Naohiro Toda, Hidefumi Nagashima, Juichi Furukawa, Ichiroh Fujii
  • Publication number: 20150017396
    Abstract: An ink for aqueous inkjet recording contains: water; a hydrosoluble organic solvent; a pigment; and polycarbonate-based urethane resin particles, wherein the pigment contains a geminalbis phosphonic acid group and/or a geminalbis phosphonate group.
    Type: Application
    Filed: July 1, 2014
    Publication date: January 15, 2015
    Applicant: RICOH COMPANY, LTD.
    Inventors: Tomohiro Nakagawa, Naohiro Toda, Hidefumi Nagashima, Ichiroh Fujii
  • Publication number: 20140377516
    Abstract: An aqueous ink for inkjet recording contains water, a hydrosoluble organic solvent, resin particles, and a pigment, wherein the hydrosoluble organic solvent contains at least three kinds of diol compounds accounting for 45% by weight or more in the hydrosoluble organic solvent, wherein three or more of the at least three kinds of diol compounds have boiling points 10° C. or greater apart from each other.
    Type: Application
    Filed: June 6, 2014
    Publication date: December 25, 2014
    Applicant: RICOH COMPANY, LTD.
    Inventors: Naohiro TODA, Tomohiro NAKAGAWA, Hidefumi NAGASHIMA, Ichiroh FUJII
  • Patent number: 8867960
    Abstract: An image forming apparatus including an image bearing member having a surface layer A having a surface hardness of 200 N/mm2 or greater, the surface layer A containing fillers made of a metal oxide and a cleaning blade having a reed-like elastic blade having a front edge portion to remove toner from the surface layer A in motion while the front edge portion is in contact with the surface layer A, the front edge portion having a laminate structure formed of a substrate of the elastic blade, a mixed layer of the substrate and an acrylic and/or methacrylic resin, the mixed layer having a thickness of 1.0 ?m or greater, and a surface layer B having an acrylic and/or methacrylic resin, the surface layer B having a thickness of 0.1 ?m or greater.
    Type: Grant
    Filed: March 4, 2013
    Date of Patent: October 21, 2014
    Assignee: Ricoh Company, Ltd.
    Inventors: Naohiro Toda, Takafumi Iwamoto, Toshihiro Ishida, Tetsuya Toshine, Yohta Sakon, Masahiro Ohmori
  • Patent number: 8866163
    Abstract: A white organic electroluminescence device includes: an anode electrode; a cathode electrode; a hole transport layer arranged between the anode electrode and the cathode electrode; an electron transport layer arranged between the anode electrode and the cathode electrode; and a plurality of light emission layers into which holes and electrons are injected from the hole transport layer and the electron transport layer, the light emission layers arranged between the hole transport layer and the electron transport layer. The light emission layers are configured to have at least one emission peak wavelength for each of blue, green and red colors, and the emission peak wavelength of the blue color ranges from about 445 nm to about 455 nm.
    Type: Grant
    Filed: April 20, 2012
    Date of Patent: October 21, 2014
    Assignee: Panasonic Corporation
    Inventors: Naohiro Toda, Hiroki Noguchi, Ayako Tsukitani
  • Publication number: 20140267520
    Abstract: A method of forming an image includes a step of heating a nonporous substrate to a temperature in a range of from 30° C. to 80° C.; and a step of forming an image on the nonporous substrate by applying water-based inks of at least two colors to the nonporous substrate employing an ink jet technique, wherein an ink set that contains water-based inks each containing a coloring material, an emulsion resin, water, and a water-soluble solvent is used to apply the water-based inks of the at least two colors, and, of the water-based inks in the ink set, at least one water-based ink has a minimum film-forming temperature different from those of water-based inks of other colors.
    Type: Application
    Filed: March 11, 2014
    Publication date: September 18, 2014
    Applicant: RICOH COMPANY, LTD.
    Inventors: Naohiro Toda, Hidefumi Nagashima, Tomohiro Nakagawa
  • Publication number: 20140199620
    Abstract: An electrophotographic photoconductor, including: an electroconductive substrate; and at least a photoconductive layer and a surface layer in this order over the electroconductive substrate, wherein the surface layer includes a resin having no charge transport properties, and first inorganic fine particles, and wherein the first inorganic fine particles are inorganic fine particles having surfaces modified with at least one of a primary amino group and a secondary amino group, and a volume resistivity of the first inorganic fine particles is 1×108 ?·cm or less.
    Type: Application
    Filed: January 15, 2014
    Publication date: July 17, 2014
    Inventors: Toshihiro ISHIDA, Hiroshi IKUNO, Tetsuya TOSHINE, Naohiro TODA, Takafumi IWAMOTO, Kazuhiro EGAWA