Patents by Inventor Naoto Shimura
Naoto Shimura 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).
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Patent number: 11964495Abstract: Provided is an ink set including: an ink containing a cyan pigment; an ink containing a magenta pigment; and an ink containing a yellow pigment, wherein the proportion of the cyan pigment is 0.70% by mass or greater but 1.40% by mass or less, and wherein the proportion of the magenta pigment and the proportion of the yellow pigment are both higher than the proportion of the cyan pigment.Type: GrantFiled: January 21, 2020Date of Patent: April 23, 2024Assignee: Ricoh Company, Ltd.Inventors: Hiromi Sakaguchi, Itsuro Sasaki, Ayaka Tanaka, Naoto Shimura, Shunsuke Horie, Hiroshi Gotou, Yuta Nakamura
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Patent number: 11904600Abstract: A printing method includes discharging ink to a substrate, heating a non-ink-discharged side of the substrate at T1, and heating an ink-discharged side of the substrate at T2, wherein the ink contains an organic solvent A (boiling point lower than 250 degrees C.), an organic solvent B (boiling point of 250 degrees C.), and a resin, where 0 degrees C. C?T2?T1?90 degrees C. is satisfied, the proportion (organic solvent A/ink) is 30 percent by mass or less, the proportion (organic solvent B/ink) is 1 to 3 percent by mass, the proportion (resin/ink) is 5 to 15 percent by mass, the ink has a viscosity of 8.0 to 11.0 mPa-s at 25 degrees C. and 5.5 to 11.0 mPa-s at 36 degrees C., and a 2.5 ?L ink droplet discharged to the substrate shrinks to 0.1 ?L within 10.0 seconds at 25 degrees C.Type: GrantFiled: March 29, 2022Date of Patent: February 20, 2024Assignee: RICOH COMPANY, LTD.Inventors: Naoto Shimura, Yuya Hirokawa, Yuusuke Koizuka, Takayuki Shimizu, Itsuro Sasaki, Shunsuke Horie, Nozomi Terai, Kenta Hagiwara
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Patent number: 11851571Abstract: Provided is an ink set including standard ink and light ink. Standard ink includes cyan, magenta, and yellow inks. Light ink includes a light cyan or light magenta ink, or both. The pigment concentration in cyan ink is 1.9% by mass or greater but 3.6% by mass or less. The pigment concentration in light cyan ink is 0.4% by mass or greater but 1.4% by mass or less. The pigment concentration in magenta ink is 1.9% by mass or greater but 3.6% by mass or less. The pigment concentration in light magenta ink is 0.4% by mass or greater but 1.4% by mass or less. The light ink contains water, organic solvent, and resin. The organic solvent contains amide compound represented by General formula (1). In General formula (1), R1, R2, and R3 each represent a hydrocarbon group containing from 1 through 8 carbon atoms.Type: GrantFiled: September 23, 2021Date of Patent: December 26, 2023Assignee: Ricoh Company, Ltd.Inventors: Yuusuke Koizuka, Naoto Shimura, Nozomi Terai, Tatsuya Takarada
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Publication number: 20230303877Abstract: An ink set contains an ink containing a coloring material, an organic solvent, and a resin, and a pre-processing fluid containing a multivalent metal salt, a resin having a glass transition temperature (Tg) of 0 degrees C. or lower, a silicone-based surfactant, and two or more types of organic solvents each having a boiling point of 220 degrees C. or lower.Type: ApplicationFiled: October 25, 2021Publication date: September 28, 2023Applicant: Ricoh Company, Ltd.Inventors: Naoto Shimura, Yuusuke Koizuka, Nozomi Terai, Tatsuya Takarada
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Publication number: 20230174811Abstract: A printing method prints an image on a leather with an ink set including a color ink and a clear ink. The printing method includes: applying the clear ink to a region of the leather where the color ink is to be applied; applying the color ink onto the clear ink applied; and applying the clear ink onto the color ink applied.Type: ApplicationFiled: June 22, 2021Publication date: June 8, 2023Applicant: Ricoh Company, Ltd.Inventors: Naoto SHIMURA, Yuusuke Koizuka
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Patent number: 11660897Abstract: Printed matter includes a substrate comprising a vinyl chloride resin and a printing layer on the substrate, wherein the surface of the substrate has a static friction coefficient of from 0.04 to 0.06 and a dynamic friction coefficient of from 0.02 to 0.03 when the surface of the substrate is rubbed with standard adjacent fabrics for staining for color fastness test under a load of 200 g, wherein the surface of the printing layer has a static friction coefficient of from 0.35 to 0.50 and a dynamic friction coefficient of from 0.20 to 0.30 when the surface of the printing layer is rubbed with standard adjacent fabrics for staining for color fastness test under a load of 200 g.Type: GrantFiled: October 8, 2021Date of Patent: May 30, 2023Assignee: Ricoh Company, Ltd.Inventors: Tatsuya Takarada, Yuusuke Koizuka, Naoto Shimura, Nozomi Terai, Takayuki Shimizu, Mio Akima
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Publication number: 20230012907Abstract: An image forming method includes a processing fluid applying step and an ink applying step. The processing fluid applying step involves applying a processing fluid containing a multivalent metal salt, a resin TA, a resin TB different from the resin TA, and a silicone-based surfactant to a non-permeating base material by an inkjet method, where the processing fluid is free of an organic solvent having a boiling point of 200° C. or higher at normal pressure. The ink applying step involves applying an ink containing a coloring material, an organic solvent, and a resin onto the processing fluid.Type: ApplicationFiled: July 1, 2022Publication date: January 19, 2023Applicant: Ricoh Company, Ltd.Inventors: Tatsuya Takarada, Yuusuke Koizuka, Naoto Shimura, Nozomi Terai, Yuya Hirokawa
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Publication number: 20220396708Abstract: A set of a processing fluid and an ink is provided where the ink contains a coloring material, an organic solvent, and a resin Ri and the processing fluid contains a polyvalent metal salt, a resin Rt, and a silicone-based surfactant. A maximum tensile stress of an ink film obtained by drying the ink is 2 N/mm2 or greater.Type: ApplicationFiled: May 31, 2022Publication date: December 15, 2022Inventors: Nozomi TERAI, Yuusuke KOIZUKA, Naoto SHIMURA, Tatsuya TAKARADA
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Patent number: 11524509Abstract: ink includes water, an alcohol having a boiling point of 240 degrees C. or lower, and an infrared absorbent, wherein the alcohol accounts for 5.0 percent by mass or more of the total amount of the ink and the ink is free of an alcohol having a boiling point higher than 240 degrees C.Type: GrantFiled: March 5, 2019Date of Patent: December 13, 2022Assignee: Ricoh Company, Ltd.Inventors: Yuta Nakamura, Naoto Shimura
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Publication number: 20220324241Abstract: A printing method includes discharging ink to a substrate, heating a non-ink-discharged side of the substrate at T1, and heating an ink-discharged side of the substrate at T2, wherein the ink contains an organic solvent A (boiling point lower than 250 degrees C.), an organic solvent B (boiling point of 250 degrees C.), and a resin, where 0 degrees C. C?T2?T1?90 degrees C. is satisfied, the proportion (organic solvent A/ink) is 30 percent by mass or less, the proportion (organic solvent B/ink) is 1 to 3 percent by mass, the proportion (resin/ink) is 5 to 15 percent by mass, the ink has a viscosity of 8.0 to 11.0 mPa-s at 25 degrees C. and 5.5 to 11.0 mPa-s at 36 degrees C., and a 2.5 ?L ink droplet discharged to the substrate shrinks to 0.1 ?L within 10.0 seconds at 25 degrees C.Type: ApplicationFiled: March 29, 2022Publication date: October 13, 2022Inventors: Naoto SHIMURA, Yuya HIROKAWA, Yuusuke KOIZUKA, Takayuki SHIMIZU, Itsuro SASAKI, Shunsuke HORIE, Nozomi TERAI, Kenta HAGIWARA
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Publication number: 20220298372Abstract: An ink used for printing on a leather includes: a coloring material, an organic solvent, and a resin; where a maximum tensile stress of an ink film formed of the ink is 2 N/mm2 or more.Type: ApplicationFiled: July 1, 2020Publication date: September 22, 2022Applicant: Ricoh Company, Ltd.Inventors: Naoto Shimura, Masaki Kudo
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Patent number: 11421124Abstract: An ink contains a coloring material, an organic solvent, a resin, and a compound represented by Chemical Formula 1 having a weight average molecular weight of from 390 to 610, where R1 represents a hydrocarbon group, and n represents an integer of 2 or greater.Type: GrantFiled: August 18, 2020Date of Patent: August 23, 2022Assignee: RICOH COMPANY, LTD.Inventors: Naoto Shimura, Yuta Nakamura, Yoshiaki Masuda
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Publication number: 20220119664Abstract: Provided is an ink set including standard ink and light ink. Standard ink includes cyan, magenta, and yellow inks. Light ink includes a light cyan or light magenta ink, or both. The pigment concentration in cyan ink is 1.9% by mass or greater but 3.6% by mass or less. The pigment concentration in light cyan ink is 0.4% by mass or greater but 1.4% by mass or less. The pigment concentration in magenta ink is 1.9% by mass or greater but 3.6% by mass or less. The pigment concentration in light magenta ink is 0.4% by mass or greater but 1.4% by mass or less. The light ink contains water, organic solvent, and resin. The organic solvent contains amide compound represented by General formula (1). In General formula (1), R1, R2, and R3 each represent a hydrocarbon group containing from 1 through 8 carbon atoms.Type: ApplicationFiled: September 23, 2021Publication date: April 21, 2022Applicant: Ricoh Company, Ltd.Inventors: Yuusuke Koizuka, Naoto Shimura, Nozomi Terai, Tatsuya Takarada
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Publication number: 20220118786Abstract: Printed matter includes a substrate comprising a vinyl chloride resin and a printing layer on the substrate, wherein the surface of the substrate has a static friction coefficient of from 0.04 to 0.06 and a dynamic friction coefficient of from 0.02 to 0.03 when the surface of the substrate is rubbed with standard adjacent fabrics for staining for color fastness test under a load of 200 g, wherein the surface of the printing layer has a static friction coefficient of from 0.35 to 0.50 and a dynamic friction coefficient of from 0.20 to 0.30 when the surface of the printing layer is rubbed with standard adjacent fabrics for staining for color fastness test under a load of 200 g.Type: ApplicationFiled: October 8, 2021Publication date: April 21, 2022Applicant: Ricoh Company, Ltd.Inventors: Tatsuya TAKARADA, Yuusuke Koizuka, Naoto Shimura, Nozomi Terai, Takayuki Shimizu, Mio Akima
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Patent number: 11274222Abstract: An ink contains a coloring material, a urethane resin, diethylene glycol diethyl ether, and a siloxane compound, wherein diethylene glycol diethyl ether has a proportion of 6.0 percent or greater by mass of the total amount of the ink.Type: GrantFiled: March 17, 2020Date of Patent: March 15, 2022Assignee: Ricoh Company, LTD.Inventors: Yuta Nakamura, Naoto Shimura
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Publication number: 20220024217Abstract: Provided is an ink set including: an ink containing a cyan pigment; an ink containing a magenta pigment; and an ink containing a yellow pigment, wherein the proportion of the cyan pigment is 0.70% by mass or greater but 1.40% by mass or less, and wherein the proportion of the magenta pigment and the proportion of the yellow pigment are both higher than the proportion of the cyan pigment.Type: ApplicationFiled: January 21, 2020Publication date: January 27, 2022Inventors: Hiromi SAKAGUCHI, Itsuro SASAKI, Ayaka TANAKA, Naoto SHIMURA, Shunsuke HORIE, Hiroshi GOTOU, Yuta NAKAMURA
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Patent number: 11015072Abstract: An ink contains water, an organic solvent, and a resin having a glass transition temperature Tg of from 0 to 70 degrees C., wherein a contact angle ?1 of the ink against a vinyl chloride resin film and a contact angle ?2 of the ink against an ink image formed with the ink satisfies the following relationship: ?1<?2.Type: GrantFiled: September 26, 2019Date of Patent: May 25, 2021Assignee: Ricoh Company, Ltd.Inventors: Yuta Nakamura, Naoto Shimura
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Publication number: 20210062026Abstract: An ink contains a coloring material, an organic solvent, a resin, and a compound represented by Chemical Formula 1 having a weight average molecular weight of from 390 to 610, where R1 represents a hydrocarbon group, and n represents an integer of 2 or greater.Type: ApplicationFiled: August 18, 2020Publication date: March 4, 2021Inventors: Naoto Shimura, Yuta Nakamura, Yoshiaki Masuda
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Patent number: 10919294Abstract: A liquid discharging device includes a carriage carrying a head configured to discharge a liquid onto a target, the liquid including an ink, the ink consisting water, an organic solvent, a coloring material, and a plurality of polysiloxane compounds, a driving unit configured to move the carriage and the target relatively to each other, a measuring unit configured to measure the distance between the carriage and the target, an image-capturing unit configured to capture a target image, and a setting unit configured to set a liquid discharging performance of the head based on a measurement result obtained by the measuring unit and the target image obtained by the image-capturing unit.Type: GrantFiled: March 15, 2019Date of Patent: February 16, 2021Assignee: Ricoh Company, Ltd.Inventors: Takuya Fujita, Hiromi Sakaguchi, Yuta Nakamura, Naoto Shimura, Yoshiaki Masuda, Tetsuto Ueda, Yoshimi Nemoto, Kenichi Taguma, Naohiro Toda, Shinya Seno, Nobuyuki Satoh
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Publication number: 20200299531Abstract: An ink contains a coloring material, a urethane resin, diethylene glycol diethyl ether, and a siloxane compound, wherein diethylene glycol diethyl ether has a proportion of 6.0 percent or greater by mass of the total amount of the ink.Type: ApplicationFiled: March 17, 2020Publication date: September 24, 2020Inventors: Yuta Nakamura, Naoto Shimura