Patents by Inventor Nozomi Terai
Nozomi Terai 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: 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
-
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
-
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
-
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
-
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
-
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
-
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
-
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
-
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
-
Publication number: 20210363369Abstract: Provided is an ink including water, an organic solvent, resin particles, and a thickener. The thickener comprises polymer particles having a carboxylic acid structure. A proportion of the thickener in the ink is 0.05% by mass or more. Change in viscosity of the ink between before and after storage of the ink at 70° C. for 1 week is 20% or less. The change in viscosity is expressed by Formula (1): Change in viscosity (%)=[(a?b)/b]×100 . . . Formula (1), where a represents a viscosity (mPa·s) at 25° C. of the ink when the ink is prepared, and b represents a viscosity (mPa·s) at 25° C. of the ink after the ink is stored at 70° C. for 1 week.Type: ApplicationFiled: May 10, 2021Publication date: November 25, 2021Inventors: Mio AKIMA, Masaki KUDO, Tomohiro HIRADE, Nozomi TERAI
-
Publication number: 20200399496Abstract: A liquid composition for surface treatment includes a nonionic resin particle, and a multivalent metal salt, wherein the contact angle of water against a film of the liquid composition is 15 or less degrees.Type: ApplicationFiled: June 9, 2020Publication date: December 24, 2020Inventors: Yuutaroh NONAKA, Tomohiro Nakagawa, Hiroki Hagiwara, Kazuhiko Umemura, Yuusuke Fujita, Nozomi Terai