Patents by Inventor Kenjiro IMAI
Kenjiro IMAI 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: 10245839Abstract: There is provided an ink tank cap configured to open and close an ink inlet port of an ink tank, the ink tank cap including a contacting portion contacting with the ink inlet port, wherein the contacting portion of the ink tank cap is formed of an ethylene-propylene-diene rubber containing silicone.Type: GrantFiled: March 10, 2017Date of Patent: April 2, 2019Assignee: Brother Kogyo Kabushiki KaishaInventors: Kenjiro Imai, Ryuji Kato
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Patent number: 9862848Abstract: An ink set includes a treatment agent containing fumed silica and a bright pigment ink containing a bright pigment and water. The treatment agent or the bright pigment ink contains urethane resin.Type: GrantFiled: March 30, 2015Date of Patent: January 9, 2018Assignee: Brother Kogyo Kabushiki KaishaInventors: Kenjiro Imai, Hideji Fukaya, Ayako Ohishi, Mitsunori Maeda, Akiko Kodama
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Publication number: 20170282571Abstract: There is provided an ink tank cap configured to open and close an ink inlet port of an ink tank, the ink tank cap including a contacting portion contacting with the ink inlet port, wherein the contacting portion of the ink tank cap is formed of an ethylene-propylene-diene rubber containing silicone.Type: ApplicationFiled: March 10, 2017Publication date: October 5, 2017Inventors: Kenjiro Imai, Ryuji Kato
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Patent number: 9649843Abstract: There is provide an ink-jet recording apparatus including: an ink containing a resin dispersion type pigment; an ink-jet head configured to discharge the ink; an absorber which is arranged in an area facing a discharge surface of the ink-jet head, and which is configured to absorb the ink discharged from the ink-jet head; and a liquid agent which contains a water-soluble organic solvent, and which is absorbed in the absorber, wherein a surface tension of an aqueous solution containing the liquid agent at concentration of 5% by weight is not more than 50 mN/m; and a blending percentage by weight of the water-soluble organic solvent in the liquid agent is not less than seven times a blending percentage by weight of the resin dispersion type pigment in the ink.Type: GrantFiled: February 26, 2016Date of Patent: May 16, 2017Assignee: Brother Kogyo Kabushiki KaishaInventors: Kenjiro Imai, Atsushi Nakamura
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Patent number: 9597876Abstract: There is provide an ink-jet recording apparatus including: an ink containing a self-dispersible pigment; an ink-jet head configured to discharge the ink; an absorber which is arranged in an area facing a discharge surface of the ink-jet head, and which is configured to absorb the ink discharged from the ink-jet head; and a liquid agent which contains a water-soluble organic solvent, and which is absorbed in the absorber, wherein a surface tension of an aqueous solution containing the liquid agent at concentration of 5% by weight is not more than 50 mN/m; and a blending percentage by weight of the water-soluble organic solvent in the liquid agent is not less than five times a blending percentage by weight of the self-dispersible pigment in the ink.Type: GrantFiled: February 26, 2016Date of Patent: March 21, 2017Assignee: Brother Kogyo Kabushiki KaishaInventors: Kenjiro Imai, Atsushi Nakamura
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Publication number: 20160250856Abstract: There is provide an ink-jet recording apparatus including: an ink containing a resin dispersion type pigment; an ink-jet head configured to discharge the ink; an absorber which is arranged in an area facing a discharge surface of the ink-jet head, and which is configured to absorb the ink discharged from the ink-jet head; and a liquid agent which contains a water-soluble organic solvent, and which is absorbed in the absorber, wherein a surface tension of an aqueous solution containing the liquid agent at concentration of 5% by weight is not more than 50 mN/m; and a blending percentage by weight of the water-soluble organic solvent in the liquid agent is not less than seven times a blending percentage by weight of the resin dispersion type pigment in the ink.Type: ApplicationFiled: February 26, 2016Publication date: September 1, 2016Inventors: Kenjiro Imai, Atsushi Nakamura
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Publication number: 20160250857Abstract: There is provide an ink-jet recording apparatus including: an ink containing a self-dispersible pigment; an ink-jet head configured to discharge the ink; an absorber which is arranged in an area facing a discharge surface of the ink-jet head, and which is configured to absorb the ink discharged from the ink-jet head; and a liquid agent which contains a water-soluble organic solvent, and which is absorbed in the absorber, wherein a surface tension of an aqueous solution containing the liquid agent at concentration of 5% by weight is not more than 50 mN/m; and a blending percentage by weight of the water-soluble organic solvent in the liquid agent is not less than five times a blending percentage by weight of the self-dispersible pigment in the ink.Type: ApplicationFiled: February 26, 2016Publication date: September 1, 2016Inventors: Kenjiro Imai, Atsushi Nakamura
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Patent number: 9393808Abstract: A recording method includes applying, to a recording medium, a treatment agent containing inorganic fine particles; discharging a bright pigment ink containing a bright pigment and water to a portion of the recording medium to which the treatment agent has been applied; and discharging a water-based pigment ink containing a pigment different from the bright pigment and water to the portion of the recording medium to which the bright pigment ink has been discharged.Type: GrantFiled: March 30, 2015Date of Patent: July 19, 2016Assignee: Brother Kogyo Kabushiki KaishaInventors: Ayako Ohishi, Mitsunori Maeda, Kenjiro Imai
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Patent number: 9340690Abstract: An ink set including: a treatment agent containing 2,2,4-trimethyl-1,3-pentanediol-1-monoisobutyrate or a derivative thereof; and a bright pigment ink containing a bright pigment and water, wherein the treatment agent or the bright pigment ink contains urethane resin; and the ink set satisfies the following conditions (A) and (B): 1?X?6??(A) 0.2?Y/X?2??(B) X: the sum of a blending amount (% by weight) of the urethane resin in the treatment agent and a blending amount (% by weight) of the urethane resin in the bright pigment ink Y: a blending amount (% by weight) of the 2,2,4-trimethyl-1,3-pentanediol-1-monoisobutyrate and the derivative thereof in the treatment agent.Type: GrantFiled: March 30, 2015Date of Patent: May 17, 2016Assignee: Brother Kogyo Kabushiki KaishaInventors: Mitsunori Maeda, Kenjiro Imai, Ayako Ohishi
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Patent number: 9283746Abstract: A recording method includes: applying, to a recording medium, a treatment agent containing inorganic fine particles; discharging a water-based dye ink containing a dye and water to a portion of the recording medium to which the treatment agent has been applied; and discharging a bright pigment ink containing a bright pigment and water to the portion of the recording medium to which the water-based dye ink has been discharged.Type: GrantFiled: March 30, 2015Date of Patent: March 15, 2016Assignee: Brother Kogyo Kabushiki KaishaInventors: Kenjiro Imai, Ayako Ohishi, Mitsunori Maeda
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Publication number: 20150275004Abstract: An ink set includes a treatment agent containing fumed silica and a bright pigment ink containing a bright pigment and water. The treatment agent or the bright pigment ink contains urethane resin.Type: ApplicationFiled: March 30, 2015Publication date: October 1, 2015Inventors: Kenjiro Imai, Hideji Fukaya, Ayako Ohishi, Mitsunori Maeda, Akiko Kodama
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Publication number: 20150275003Abstract: An ink set including: a treatment agent containing 2,2,4-trimethyl-1,3-pentanediol-1-monoisobutyrate or a derivative thereof; and a bright pigment ink containing a bright pigment and water, wherein the treatment agent or the bright pigment ink contains urethane resin; and the ink set satisfies the following conditions (A) and (B): 1?X?6??(A) 0.2?Y/X?2??(B) X: the sum of a blending amount (% by weight) of the urethane resin in the treatment agent and a blending amount (% by weight) of the urethane resin in the bright pigment ink Y: a blending amount (% by weight) of the 2,2,4-trimethyl-1,3-pentanediol-1-monoisobutyrate and the derivative thereof in the treatment agent.Type: ApplicationFiled: March 30, 2015Publication date: October 1, 2015Inventors: Mitsunori Maeda, Kenjiro Imai, Ayako Ohishi
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Publication number: 20150273885Abstract: A recording method includes: applying, to a recording medium, a treatment agent containing inorganic fine particles; discharging a water-based dye ink containing a dye and water to a portion of the recording medium to which the treatment agent has been applied; and discharging a bright pigment ink containing a bright pigment and water to the portion of the recording medium to which the water-based dye ink has been discharged.Type: ApplicationFiled: March 30, 2015Publication date: October 1, 2015Inventors: Kenjiro Imai, Ayako Ohishi, Mitsunori Maeda
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Publication number: 20150273884Abstract: A recording method includes applying, to a recording medium, a treatment agent containing inorganic fine particles; discharging a bright pigment ink containing a bright pigment and water to a portion of the recording medium to which the treatment agent has been applied; and discharging a water-based pigment ink containing a pigment different from the bright pigment and water to the portion of the recording medium to which the bright pigment ink has been discharged.Type: ApplicationFiled: March 30, 2015Publication date: October 1, 2015Inventors: Ayako Ohishi, Mitsunori Maeda, Kenjiro Imai
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Patent number: 8888263Abstract: Disclosed is a treatment solution for ink jet recording, including: an aggregating agent; water; and tetraethylene glycol monobutyl ether and pentaethylene glycol monobutyl ether, wherein: tetraethylene glycol monobutyl ether and pentaethylene glycol monobutyl ether are contained by 1 % by weight to 10 % by weight in total in the treatment solution; and a weight ratio (X:Y) of tetraethylene glycol monobutyl ether (X) to pentaethylene glycol monobutyl ether (Y) is 50:50 to 90:10.Type: GrantFiled: January 27, 2012Date of Patent: November 18, 2014Assignee: Brother Kogyo Kabushiki KaishaInventors: Junichiro Sugimoto, Tatsunosuke Hoshi, Masaya Fujioka, Satoshi Okuda, Eiji Kawamura, Kenjiro Imai
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Patent number: 8870358Abstract: Disclosed is a water-based ink for ink jet recording, including: a colorant; water; and tetraethylene glycol monobutyl ether and pentaethylene glycol monobutyl ether, wherein: tetraethylene glycol monobutyl ether and pentaethylene glycol monobutyl ether are contained by 1% by weight to 10% by weight in total in the water-based ink for ink jet recording; and a weight ratio (X:Y) of tetraethylene glycol monobutyl ether (X) to pentaethylene glycol monobutyl ether (Y) is 50:50 to 90:10.Type: GrantFiled: January 27, 2012Date of Patent: October 28, 2014Assignee: Brother Kogyo Kabushiki KaishaInventors: Satoshi Okuda, Masaya Fujioka, Noriaki Satoh, Tatsunosuke Hoshi, Junichiro Sugimoto, Kenjiro Imai, Eiji Kawamura
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Publication number: 20140292900Abstract: A water-based ink for ink-jet recording includes: a pigment; water; tripropylene glycol contained not more than 28% by weight in the water-based ink; and 1,2-diol having a number of 8 to 10 carbon atoms; wherein a weight ratio (X:Y) of the tripropylene glycol (X) to the 1,2-diol (Y) in the water-based ink is in a range of X:Y=50:1 to 2.4:1.Type: ApplicationFiled: March 27, 2014Publication date: October 2, 2014Applicant: BROTHER KOGYO KABUSHIKI KAISHAInventors: Tatsunosuke Hoshi, Kenjiro Imai
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Publication number: 20120249699Abstract: Disclosed is a treatment solution for ink jet recording, including: an aggregating agent; water; and tetraethylene glycol monobutyl ether and pentaethylene glycol monobutyl ether, wherein: tetraethylene glycol monobutyl ether and pentaethylene glycol monobutyl ether are contained by 1% by weight to 10% by weight in total in the treatment solution; and a weight ratio (X:Y) of tetraethylene glycol monobutyl ether (X) to pentaethylene glycol monobutyl ether (Y) is 50:50 to 90:10.Type: ApplicationFiled: January 27, 2012Publication date: October 4, 2012Applicant: BROTHER KOGYO KABUSHIKI KAISHAInventors: Junichiro SUGIMOTO, Tatsunosuke HOSHI, Masaya FUJIOKA, Satoshi OKUDA, Eiji KAWAMURA, Kenjiro IMAI
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Publication number: 20120249647Abstract: Disclosed is a water-based ink for ink jet recording, including: a colorant; water; and tetraethylene glycol monobutyl ether and pentaethylene glycol monobutyl ether, wherein: tetraethylene glycol monobutyl ether and pentaethylene glycol monobutyl ether are contained by 1% by weight to 10% by weight in total in the water-based ink for ink jet recording; and a weight ratio (X:Y) of tetraethylene glycol monobutyl ether (X) to pentaethylene glycol monobutyl ether (Y) is 50:50 to 90:10.Type: ApplicationFiled: January 27, 2012Publication date: October 4, 2012Applicant: BROTHER KOGYO KABUSHIKI KAISHAInventors: Satoshi OKUDA, Masaya FUJIOKA, Noriaki SATOH, Tatsunosuke HOSHI, Junichiro SUGIMOTO, Kenjiro IMAI, Eiji KAWAMURA