Patents by Inventor Kenichiro Kubota
Kenichiro Kubota 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: 9868287Abstract: Provided is a method for maintaining an ink jet recording apparatus according to the invention in an ink jet recording apparatus which performs recording using a solvent-based ink composition which includes at least one type of organic solvent selected from a group consisting of an ester-based solvent, a hydrocarbon-based solvent, and an alcohol-based solvent, the method including wiping a nozzle forming member, in which nozzles of a head which discharges the solvent-based ink composition are formed, using an impregnation solution and a wiping member with liquid absorbency, in which the impregnation solution contains at least one type of organic solvent selected from a group consisting of a compound which is represented by General Formula (1) below, esters, and dibasic acid esters, R1—O—(R2—O)n—R3??(1) (in General Formula (1) described above, R1 represents a hydrogen atom, an aryl group, or an alkyl group with 1 to 6 carbon atoms, R2 represents an alkylene group with 2 to 4 carbon atoms, R3 represents an arType: GrantFiled: March 9, 2016Date of Patent: January 16, 2018Assignee: Seiko Epson CorporationInventors: Jun Ito, Makoto Nagase, Kenichiro Kubota, Naoki Koike, Keiji Iida
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Patent number: 9758686Abstract: A solvent-based ink jet ink composition includes a coloring material; and a solvent; in which the composition includes, as the solvent, two or more types of solvent that are compounds represented by the following general formula (1), and R1, R2, and R3 have the same structure as one another and m are consecutive integers, in the solvent. R1O—(R2O)m—R3??(1) (in the formula, R1 is a hydrogen atom or an alkyl group with 1 to 6 carbon atoms, R2 is an alkylene group with 2 or 3 carbon atoms, and R3 is a hydrogen atom, an acetyl group, or an alkyl group with 1 to 4 carbon atoms. However, both of R1 and R3 are not hydrogen atoms. m is an integer of 1 to 7).Type: GrantFiled: February 17, 2016Date of Patent: September 12, 2017Assignee: Seiko Epson CorporationInventors: Makoto Nagase, Kenichiro Kubota, Jun Ito, Naoki Koike
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Patent number: 9758685Abstract: A nonaqueous ink jet ink composition according to the invention includes a solvent including at least one compound represented by the following formula (1), and a pigment including a pigment orange 43 (PO-43), in which a Na amount included in the ink is 5 ppm to 500 ppm. R1O—(R2O)m—R3??(1) (wherein, in formula (1), R1 and R3 each independently represent hydrogen or an alkyl group having 1 to 5 carbon atoms. However, either R1 or R3 is an alkyl group having 1 to 5 carbon atoms. R2 represents an alkylene group having 2 or 3 carbon atoms. m represents an integer of 1 to 6.Type: GrantFiled: December 14, 2015Date of Patent: September 12, 2017Assignee: Seiko Epson CorporationInventors: Jun Ito, Keiji Iida, Kenichiro Kubota, Naoki Koike, Makoto Nagase
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Patent number: 9725610Abstract: A non-aqueous ink composition for ink jet recording includes a pigment, a compound represented by General formula 1 below, and a phthalocyanine derivative provided with a polar group not having an amine structure, as a pigment dispersant for dispersing the pigment. The pigment is carbon black. The composition further includes an alkylene glycol monoalkyl ether: (wherein R1 indicates an alkyl group of 1 to 4 carbon atoms, and R2 and R3 each independently indicate a methyl group or an ethyl group).Type: GrantFiled: January 29, 2015Date of Patent: August 8, 2017Assignee: Seiko Epson CorporationInventors: Keiji Iida, Makoto Nagase, Kenichiro Kubota, Akihito Sao
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Publication number: 20170218216Abstract: An ink composition set has at least a solvent-based orange ink composition containing an orange pigment as a pigment and a solvent and a solvent-based red ink composition containing a red pigment as a pigment and a solvent.Type: ApplicationFiled: January 19, 2017Publication date: August 3, 2017Inventors: Kenichiro KUBOTA, Makoto NAGASE, Jun ITO, Naoki KOIKE, Keiji IIDA
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Publication number: 20170210923Abstract: A non-aqueous ink jet composition includes a pigment at least containing a diketopyrrolopyrrole red pigment, and an organic solvent at least containing a glycol diether represented by Formula (1): R1O—(R3O)m—R2 and a glycol monoether represented by Formula (2): OH—(R5O)n—R4, wherein, in Formula (1), R1 and R2 each independently represent an alkyl group having 1 to 7 carbon atoms, R3 represents an alkylene group having 1 to 3 carbon atoms, and m represents an integer of 1 to 7; and in Formula (2), R4 represents an alkyl group having 1 to 7 carbon atoms, R5 represents an alkylene group having 1 to 3 carbon atoms, and n represents an integer of 1 to 7.Type: ApplicationFiled: January 19, 2017Publication date: July 27, 2017Inventors: Kenichiro KUBOTA, Naoki KOIKE, Jun ITO, Shugo HATTORI
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Publication number: 20170210924Abstract: A non-aqueous ink jet composition includes a pigment component containing a diketopyrrolopyrrole pigment and an organic solvent. The organic solvent contains glycol ethers. The amount of dissolved nitrogen in the non-aqueous ink jet composition is 90 mass ppm or less based on the total amount of the non-aqueous ink jet composition.Type: ApplicationFiled: January 25, 2017Publication date: July 27, 2017Inventors: Kenichiro KUBOTA, Naoki KOIKE, Jun ITO, Shugo HATTORI
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Publication number: 20170210925Abstract: A non-aqueous ink jet composition includes a pigment component containing a diketopyrrolopyrrole pigment and an organic solvent. The organic solvent contains a glycol ether. The amount of water in the non-aqueous ink jet composition is 10 mass % or less based on the total amount of the non-aqueous ink jet composition.Type: ApplicationFiled: January 25, 2017Publication date: July 27, 2017Inventors: Shugo HATTORI, Naoki KOIKE, Jun ITO, Kenichiro KUBOTA
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Publication number: 20170165966Abstract: An ink jet recording method including causing ink to adhere to a recording medium by ejecting an ink composition using a print head provided with a nozzle, a pressure chamber, and a connection portion which connects the pressure chamber and the nozzle to each other at a length of 500 ?m or more, in which the ink composition includes a coloring material and a solvent represented by General Formula (1) below at 30 mass % or more with respect to a total mass of the ink composition, R1O—(R2O)n—R3??(1) (in General Formula (1), R1 and R3 each independently represent a hydrogen or an alkyl group with 1 to 5 carbon atoms and at least one of R1 and R3 is an alkyl group with 1 to 5 carbon atoms, R2 represents an alkylene group with 2 to 4 carbon atoms, and n represents an integer of 1 to 6).Type: ApplicationFiled: November 21, 2016Publication date: June 15, 2017Inventors: Jun ITO, Kenichiro KUBOTA, Naoki KOIKE, Keiji IIDA
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Publication number: 20170073534Abstract: A solvent-based ink jet ink composition accommodating body includes a solvent-based ink jet ink composition which includes a solvent that is a compound represented by a general formula (1) below, and for which a moisture absorption rate is 2 (mass %·24 hours) or more at 40° C. and a relative humidity of 100% RH; and a container in which the solvent-based ink jet ink composition is accommodated, in which the container is either of at least a container formed of a member having an inorganic oxide layer or a package which accommodates the container in which the solvent-based ink jet ink composition is accommodated and is formed of a member having an inorganic oxide layer. R1O—(R2O)m—R3 ??(1) (In general formula (1), R1 and R3 each independently represent hydrogen or an alkyl group having 1 to 5 carbon atoms. Herein, either of at least R1 or R3 is an alkyl group having 1 to 5 carbon atoms. R2 represents an alkylene group having 2 to 4 carbon atoms. m represents an integer of 1 to 6.Type: ApplicationFiled: August 24, 2016Publication date: March 16, 2017Inventors: Jun ITO, Kenichiro KUBOTA, Naoki KOIKE, Shugo HATTORI
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Patent number: 9534129Abstract: A non-aqueous ink jet ink composition contains a glitter pigment, glycol diether represented by the following formula 1 and having a flash point of 70° C. or less, and glycol monoether represented by the following formula 2: R1O—(R2O)m—R3??Formula 1: (In Formula 1, R1 and R3 each independently represent alkyl groups having 1 to 4 carbon atoms, R2 each independently represents alkylene groups having 2 to 3 carbon atoms, and m is an integer of 1 to 4.); and HO—(R4O)n—R5??Formula 2: (In Formula 2, R4 each independently represents alkylene groups having 2 to 3 carbon atoms, R5 is an alkyl group having 1 to 4 carbon atoms, and n is an integer of 1 to 4.).Type: GrantFiled: February 17, 2016Date of Patent: January 3, 2017Assignee: Seiko Epson CorporationInventors: Naoki Koike, Jun Ito, Kenichiro Kubota, Makoto Nagase
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Publication number: 20160263899Abstract: Provided is a method for maintaining an ink jet recording apparatus according to the invention in an ink jet recording apparatus which performs recording using a solvent-based ink composition which includes at least one type of organic solvent selected from a group consisting of an ester-based solvent, a hydrocarbon-based solvent, and an alcohol-based solvent, the method including wiping a nozzle forming member, in which nozzles of a head which discharges the solvent-based ink composition are formed, using an impregnation solution and a wiping member with liquid absorbency, in which the impregnation solution contains at least one type of organic solvent selected from a group consisting of a compound which is represented by General Formula (1) below, esters, and dibasic acid esters, R1—O—(R2—O)n—R3??(1) (in General Formula (1) described above, R1 represents a hydrogen atom, an aryl group, or an alkyl group with 1 to 6 carbon atoms, R2 represents an alkylene group with 2 to 4 carbon atoms, R3 represents an aType: ApplicationFiled: March 9, 2016Publication date: September 15, 2016Inventors: Jun ITO, Makoto NAGASE, Kenichiro KUBOTA, Naoki KOIKE, Keiji IIDA
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Publication number: 20160264805Abstract: A solvent-based ink jet ink composition includes a pigment, a solvent a that is a cyclic ester; and a solvent b with a lower dissolving power of polyvinyl chloride than the solvent a, in which a content of the solvent a is 1.0 to 7.0 mass %, and a content of the solvent b is 10 parts by mass or more to one part by mass of the content of the solvent a.Type: ApplicationFiled: March 9, 2016Publication date: September 15, 2016Inventors: Makoto NAGASE, Kenichiro KUBOTA, Jun ITO, Naoki KOIKE, Shugo HATTORI
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Publication number: 20160237293Abstract: A non-aqueous ink jet ink composition contains a glitter pigment, glycol diether represented by the following formula 1 and having a flash point of 70° C. or less, and glycol monoether represented by the following formula 2: R1O—(R2O)m—R3??Formula 1: (In Formula 1, R1 and R3 each independently represent alkyl groups having 1 to 4 carbon atoms, R2 each independently represents alkylene groups having 2 to 3 carbon atoms, and m is an integer of 1 to 4.); and HO—(R4O)n—R5??Formula 2: (In Formula 2, R4 each independently represents alkylene groups having 2 to 3 carbon atoms, R5 is an alkyl group having 1 to 4 carbon atoms, and n is an integer of 1 to 4.).Type: ApplicationFiled: February 17, 2016Publication date: August 18, 2016Inventors: Naoki KOIKE, Jun ITO, Kenichiro KUBOTA, Makoto NAGASE
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Publication number: 20160237291Abstract: A solvent-based ink jet ink composition includes a coloring material; and a solvent; in which the composition includes, as the solvent, two or more types of solvent that are compounds represented by the following general formula (1), and R1, R2, and R3 have the same structure as one another and m are consecutive integers, in the solvent. R1O—(R2O)m—R3??(1) (in the formula, R1 is a hydrogen atom or an alkyl group with 1 to 6 carbon atoms, R2 is an alkylene group with 2 or 3 carbon atoms, and R3 is a hydrogen atom, an acetyl group, or an alkyl group with 1 to 4 carbon atoms. However, both of R1 and R3 are not hydrogen atoms. m is an integer of 1 to 7.Type: ApplicationFiled: February 17, 2016Publication date: August 18, 2016Inventors: Makoto NAGASE, Kenichiro KUBOTA, Jun ITO, Naoki KOIKE
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Publication number: 20160237292Abstract: A non-aqueous ink jet ink composition contains a white pigment having an average particle diameter of 200 nm or more and 400 nm or less, glycol diether represented by the following formula 1 and having a flash point of 70° C. or less, and glycol monoether represented by the following formula 2: R1O—(R2O)m—R3??Formula 1: (In Formula 1, R1 and R3 each independently represent alkyl groups having 1 to 4 carbon atoms, R2 each independently represents alkylene groups having 2 to 3 carbon atoms, and m is an integer of 1 to 4.); and HO—(R4O)n—R5??Formula 2: (In Formula 2, R4 each independently represents alkylene groups having 2 to 3 carbon atoms, R5 is an alkyl group having 1 to 4 carbon atoms, and n is an integer of 1 to 4.).Type: ApplicationFiled: February 17, 2016Publication date: August 18, 2016Inventors: Naoki KOIKE, Jun ITO, Kenichiro KUBOTA, Makoto NAGASE
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Publication number: 20160222235Abstract: A non-aqueous ink jet ink composition contains C.I. Pigment Orange 43 as a pigment and one or more kinds of compounds represented by the following general formula (1) as a solvent and the content of water contained in the ink composition is 0.1% by mass or more and 2% by mass or less, R1O—(R2O)m—R3??(1). In general formula (1), R1 and R3 each independently represent hydrogen or an alkyl group in which the number of carbon atoms is 1 or more and 4 or less. At least one of R1 and R3 is an alkyl group in which the number of carbon atoms is 1 or more and 4 or less. R2 represents an alkylene group having 2 or 3 carbon atoms. m represents an integer of 2 or 3.Type: ApplicationFiled: February 2, 2016Publication date: August 4, 2016Inventors: Keiji IIDA, Kenichiro KUBOTA, Jun ITO, Naoki KOIKE, Makoto NAGASE
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Publication number: 20160168405Abstract: A nonaqueous ink jet ink composition according to the invention includes a solvent including at least one compound represented by the following formula (1), and a pigment including a pigment orange 43 (PO-43), in which a Na amount included in the ink is 5 ppm to 500 ppm. R1O—(R2O)m—R3??(1) (wherein, in formula (1), R1 and R3 each independently represent hydrogen or an alkyl group having 1 to 5 carbon atoms. However, either R1 or R3 is an alkyl group having 1 to 5 carbon atoms. R2 represents an alkylene group having 2 or 3 carbon atoms. m represents an integer of 1 to 6.Type: ApplicationFiled: December 14, 2015Publication date: June 16, 2016Inventors: Jun ITO, Keiji Iida, Kenichiro KUBOTA, Naoki KOIKE, Makoto NAGASE
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Publication number: 20160115330Abstract: An ink composition includes a solvent containing at least one compound represented by the following general formula (1): R1O—(R2O)m—R3??(1) wherein R1 and R3 each independently represent a hydrogen or an alkyl group having from 1 to 4 carbon atoms, R2 represents an alkylene group having 2 or 3 carbon atoms, and m represents an integer of 2 or 3; and a pigment containing Pigment Orange-43 (PO-43) having a volume average particle size of 100 nm or more and 400 nm or less.Type: ApplicationFiled: October 23, 2015Publication date: April 28, 2016Applicant: Seiko Epson CorporationInventors: Naoki Koike, Keiji Iida, Jun Ito, Kenichiro Kubota, Makoto Nagase
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Patent number: 9238744Abstract: A colorant, lactone having a content in a range of 5% by mass to 40% by mass, a first solvent having a water vapor pressure of 2 hPa or more and a content in a range of 5% by mass to 18% by mass at 20° C., and a second solvent having a water vapor pressure of 0.9 hPa or more and a content in a range of 2% by mass to 80% by mass at 20° C. are contained, a sum of the content of the first solvent and the content of the second solvent is 20% by mass or more, and the second solvent is at least one solvent selected from a group consisting of (poly)alkylene glycol monoalkyl ether and (poly)alkylene glycol dialkyl ether.Type: GrantFiled: March 20, 2014Date of Patent: January 19, 2016Assignee: SEIKO EPSON CORPORATIONInventors: Kenichiro Kubota, Akihito Sao, Makoto Nagase, Jun Ito