Patents by Inventor Eiichi Nakata
Eiichi Nakata 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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Publication number: 20240123738Abstract: Provided is an ink jet recording method which can record an image excellent in abrasion resistance and in which an ink after storage is excellent in filter passability. The ink jet recording method includes ejecting an aqueous ink to a recording medium to record an image with an ink jet recording apparatus including: the aqueous ink; an ink storage bag configured to store the aqueous ink; and a recording head of an ink jet system configured to eject the aqueous ink. The recording head includes, in an inside thereof, a filter configured to pass the aqueous ink therethrough. The aqueous ink contains a pigment, a wax, a dispersant for dispersing the wax and a resin particle.Type: ApplicationFiled: October 13, 2023Publication date: April 18, 2024Inventors: YUKO NEGISHI, EIICHI NAKATA, NAO ISHIJIMA
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Publication number: 20230077739Abstract: The ink jet recording method includes ejecting an aqueous ink from a recording head to apply the aqueous ink to a recording medium, to thereby record an image. The ink jet recording method includes: ejecting the aqueous ink heated to a temperature TH (° C.) from the recording head to apply the aqueous ink to the recording medium; and heating the recording medium having the aqueous ink applied thereto to a temperature TF (° C.), the aqueous ink containing a pigment and a polyester resin particle, a glass transition temperature TG (° C.) of the polyester resin particle, the temperature TH (° C.) and the temperature TF (° C.) satisfying relationships of the following expressions (1) to (3). TG(° C.)>TH(° C.) ??(1) TF(° C.)?TH(° C.)+10° C. ??(2) TF(° C.)?TG(° C.)?10° C.Type: ApplicationFiled: September 6, 2022Publication date: March 16, 2023Inventors: Eiichi Nakata, Eriko Yoshino, Ryo Tsujii, Yoshitaka Torisaka, Masanori Yoshida
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Patent number: 10661569Abstract: An ink tank is used for an ink jet recording apparatus and includes an ink storage bag storing an ink, and the ink storage bag has no mechanism for allowing a side wall portion to shrink into a preliminary defined shape but has a side wall portion to shrink as the ink flows out. The ink tank has no mechanism for adjusting the pressure in the ink storage bag, the ink storage bag is made from a resin, the ink is an aqueous ink containing a coloring material and a water-soluble organic solvent, and the difference between the average SP of the water-soluble organic solvent and the SP of the resin constituting the ink storage bag is 2.0 (cal/cm3)1/2 or more. An ink jet recording apparatus includes the ink tank and a recording head that ejects an ink supplied from the ink tank by an ink jet method.Type: GrantFiled: October 10, 2018Date of Patent: May 26, 2020Assignee: CANON KABUSHIKI KAISHAInventors: Maki Motomura, Taro Endo, Eiichi Nakata
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Patent number: 10654279Abstract: An ink tank is used for an ink jet recording apparatus and includes an ink storage bag storing an ink, and the ink storage bag has no mechanism for allowing a side wall portion to shrink into a preliminary defined shape but has a side wall portion to shrink as the ink flows out. The ink tank has no mechanism for adjusting the pressure in the ink storage bag, the ink storage bag is made from a polyolefin resin, the ink is an aqueous ink containing a coloring material and a resin, and the resin contained in the ink has a glass transition temperature higher than the glass transition temperature of the polyolefin resin constituting the ink storage bag. An ink jet recording apparatus includes the ink tank and a recording head that eject an ink supplied from the ink tank by an ink jet method.Type: GrantFiled: October 10, 2018Date of Patent: May 19, 2020Assignee: CANON KABUSHIKI KAISHAInventors: Eiichi Nakata, Taro Endo, Maki Motomura
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Patent number: 10654288Abstract: To provide an ink jet recording method using facedown discharge and capable of obtaining a recorded matter being suppressed a generation of minus curl. The method provided is an ink jet recording method including a step of recording an image on a recording medium having a first surface and a second surface by ejecting an aqueous ink from a recording head. This method further includes, after the recording step, a step of discharging the recording medium while placing the first surface or the second surface on which the image has been recorded last on a gravitationally lower side. In this method, the aqueous ink has a viscosity ?1 of 5.0 mPa·s or more and a difference ?2??1 between a viscosity ?2 of an evaporated ink obtained by evaporating 20% by mass of the aqueous ink and the viscosity ?1 of the aqueous ink is 4.0 mPa·s or more.Type: GrantFiled: September 21, 2018Date of Patent: May 19, 2020Assignee: Canon Kabushiki KaishaInventors: Eiichi Nakata, Minako Kawabe
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Patent number: 10280326Abstract: An ink jet recording method includes: performing application of aqueous ink onto a unit area by one relative scanning with a recording head and a recording medium to record an image, wherein the aqueous ink comprises a self-dispersion pigment, a urethane resin, and polyethylene glycol, a kind of the self-dispersion pigment is carbon black, number average molecular weight of the polyethylene glycol is 600 or more, and viscosity of the aqueous ink is 5 mPa·s or more.Type: GrantFiled: November 9, 2017Date of Patent: May 7, 2019Assignee: Canon Kabushiki KaishaInventors: Arihiro Saito, Kouhei Nakagawa, Eiichi Nakata, Yoshihide Aikawa
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Publication number: 20190111691Abstract: An ink tank is used for an ink jet recording apparatus and includes an ink storage bag storing an ink, and the ink storage bag has no mechanism for allowing a side wall portion to shrink into a preliminary defined shape but has a side wall portion to shrink as the ink flows out. The ink tank has no mechanism for adjusting the pressure in the ink storage bag, the ink storage bag is made from a polyolefin resin, the ink is an aqueous ink containing a coloring material and a resin, and the resin contained in the ink has a glass transition temperature higher than the glass transition temperature of the polyolefin resin constituting the ink storage bag. An ink jet recording apparatus includes the ink tank and a recording head that eject an ink supplied from the ink tank by an ink jet method.Type: ApplicationFiled: October 10, 2018Publication date: April 18, 2019Inventors: Eiichi Nakata, Taro Endo, Maki Motomura
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Publication number: 20190111692Abstract: An ink tank is used for an ink jet recording apparatus and includes an ink storage bag storing an ink, and the ink storage bag has no mechanism for allowing a side wall portion to shrink into a preliminary defined shape but has a side wall portion to shrink as the ink flows out. The ink tank has no mechanism for adjusting the pressure in the ink storage bag, the ink storage bag is made from a resin, the ink is an aqueous ink containing a coloring material and a water-soluble organic solvent, and the difference between the average SP of the water-soluble organic solvent and the SP of the resin constituting the ink storage bag is 2.0 (cal/cm3)1/2 or more. An ink jet recording apparatus includes the ink tank and a recording head that ejects an ink supplied from the ink tank by an ink jet method.Type: ApplicationFiled: October 10, 2018Publication date: April 18, 2019Inventors: MAKI MOTOMURA, Taro Endo, Eiichi Nakata
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Publication number: 20190111711Abstract: To provide an ink jet recording method using facedown discharge and capable of obtaining a recorded matter being suppressed a generation of minus curl. The method provided is an ink jet recording method including a step of recording an image on a recording medium having a first surface and a second surface by ejecting an aqueous ink from a recording head. This method further includes, after the recording step, a step of discharging the recording medium while placing the first surface or the second surface on which the image has been recorded last on a gravitationally lower side. In this method, the aqueous ink has a viscosity rp of 5.0 mPa·s or more and a difference ?2??1 between a viscosity ?2 of an evaporated ink obtained by evaporating 20% by mass of the aqueous ink and the viscosity rp of the aqueous ink is 4.0 mPa·s or more.Type: ApplicationFiled: September 21, 2018Publication date: April 18, 2019Inventors: Eiichi Nakata, Minako Kawabe
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Publication number: 20180134907Abstract: An ink jet recording method includes: performing application of aqueous ink onto a unit area by one relative scanning with a recording head and a recording medium to record an image, wherein the aqueous ink comprises a self-dispersion pigment, a urethane resin, and polyethylene glycol, a kind of the self-dispersion pigment is carbon black, number average molecular weight of the polyethylene glycol is 600 or more, and viscosity of the aqueous ink is 5 mPa·s or more.Type: ApplicationFiled: November 9, 2017Publication date: May 17, 2018Inventors: Arihiro Saito, Kouhei Nakagawa, Eiichi Nakata, Yoshihide Aikawa
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Patent number: 9605170Abstract: Provided is an ink set enabling the recording of images that have excellent color developability and bronzing resistance and have suppressed a coloring by fringe when a clear ink and a pigment ink are used in combination. An aqueous ink set includes a combination of a first ink containing no coloring material and a second ink containing a coloring material.Type: GrantFiled: January 20, 2016Date of Patent: March 28, 2017Assignee: Canon Kabushiki KaishaInventors: Kouhei Nakagawa, Eiichi Nakata, Hirofumi Ichinose
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Patent number: 9598592Abstract: Provided is an ink set enabling the recording of images that have excellent gloss clarity and bronzing resistance and have suppressed an occurrence of fringe unevenness when a clear ink and a pigment ink are used in combination. The aqueous ink set includes a combination of a first ink containing no coloring material and a second ink containing a coloring material.Type: GrantFiled: January 20, 2016Date of Patent: March 21, 2017Assignee: Canon Kabushiki KaishaInventors: Eiichi Nakata, Hirofumi Ichinose, Kouhei Nakagawa
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Publication number: 20160222239Abstract: Provided is an ink set enabling the recording of images that have excellent gloss clarity and bronzing resistance and have suppressed an occurrence of fringe unevenness when a clear ink and a pigment ink are used in combination. The aqueous ink set includes a combination of a first ink containing no coloring material and a second ink containing a coloring material.Type: ApplicationFiled: January 20, 2016Publication date: August 4, 2016Inventors: Eiichi Nakata, Hirofumi Ichinose, Kouhei Nakagawa
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Publication number: 20160222236Abstract: Provided is an ink set enabling the recording of images that have excellent color developability and bronzing resistance and have suppressed a coloring by fringe when a clear ink and a pigment ink are used in combination. An aqueous ink set includes a combination of a first ink containing no coloring material and a second ink containing a coloring material.Type: ApplicationFiled: January 20, 2016Publication date: August 4, 2016Inventors: Kouhei Nakagawa, Eiichi Nakata, Hirofumi Ichinose
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Patent number: 9187662Abstract: An ink containing water, a water-soluble organic solvent and an organic pigment, wherein a primary particle of the organic pigment has a ratio (minor axis b)/(major axis a) of 0.70 or more and a particle diameter of 35 nm or less, the ink contains a water-soluble organic solvent with a dielectric constant of 25.0 or less in an amount of 0.5% by mass or more based on the total mass of the ink, and a dielectric constant ?mix of the ink as calculated according to the following equation (1) is 66-72: ?mix=?n?nrn/?nrn??Equation (1): wherein n means a kind of water or the water-soluble organic solvent, ?n is a dielectric constant of water or the water-soluble organic solvent represented by n, and rn is a content of water or the water-soluble organic solvent represented by n based on the total mass of the ink.Type: GrantFiled: February 27, 2013Date of Patent: November 17, 2015Assignee: Canon Kabushiki KaishaInventors: Masashi Yamamoto, Eiichi Nakata, Shuichi Okazaki, Satoshi Takebayashi
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Patent number: 8834621Abstract: Provided is a pigment particle suitable for an ink capable of recording an image that is excellent in color developability and lightfastness, and has a yellow hue. The pigment particle is a pigment particle having a structure represented by the following formula (1), in which a maximum absorption wavelength of an absorption spectrum in a wavelength region of 200 nm or more and 800 nm or less is present in a range of 340 nm or more and 360 nm or less.Type: GrantFiled: August 17, 2012Date of Patent: September 16, 2014Assignee: Canon Kabushiki KaishaInventors: Satoshi Takebayashi, Yoshio Nakajima, Shuichi Okazaki, Eiichi Nakata
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Publication number: 20140198151Abstract: An ink containing water, a water-soluble organic solvent and an organic pigment, wherein a primary particle of the organic pigment has a ratio (minor axis b)/(major axis a) of 0.70 or more and a particle diameter of 35 nm or less, the ink contains a water-soluble organic solvent with a dielectric constant of 25.0 or less in an amount of 0.5% by mass or more based on the total mass of the ink, and a dielectric constant ?mix of the ink as calculated according to the following equation (1) is 66-72: ?mix=?n?nrn/?nrn??Equation (1): wherein n means a kind of water or the water-soluble organic solvent, ?n is a dielectric constant of water or the water-soluble organic solvent represented by n, and rn is a content of water or the water-soluble organic solvent represented by n based on the total mass of the ink.Type: ApplicationFiled: February 27, 2013Publication date: July 17, 2014Inventors: Masashi Yamamoto, Eiichi Nakata, Shuichi Okazaki, Satoshi Takebayashi
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Patent number: 8730520Abstract: An image processing method includes the steps of converting input image data to ink color data corresponding to each amount of a plurality of colors of achromatic inks used for printing, and generating printing data for first, second and third achromatic inks based on the ink color data. The printing data is used for printing by causing a printing head to scan a common image area in a printing medium a plurality of times, the printing head ejecting the plurality of colors of inks.Type: GrantFiled: August 3, 2011Date of Patent: May 20, 2014Assignee: Canon Kabushiki KaishaInventors: Yuji Konno, Hinako Iritani, Yuji Hamasaki, Takeshi Yazawa, Satoshi Seki, Eiichi Nakata
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Patent number: 8636350Abstract: An ink includes a plurality of pigments, a plurality of water-soluble polymers, a surfactant, and a water-soluble organic solvent. The surfactant includes a polyoxyethylene alkyl ether having an HLB value of 13.0 or more as a value determined by a Griffin method, the plurality of pigments include C.I. Pigment Yellow 74 and C.I. Pigment Yellow 128, the plurality of water-soluble polymers include an acrylic polymer and a urethane polymer, and the water-soluble organic solvent includes a compound represented by the following Formula (1): HO—(CH2CH2O)n—H, wherein n is an integer of 1 to 4.Type: GrantFiled: August 22, 2011Date of Patent: January 28, 2014Assignee: Canon Kabushiki KaishaInventors: Hideki Takayama, Eiichi Nakata, Yoshio Nakajima, Yuhei Shimizu
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Patent number: 8602546Abstract: Provided are an ink with which an image excellent in both black density and glossiness can be recorded, and an ink cartridge and an ink jet recording method each using the ink. The ink includes: a carbon black; a resin for dispersing the carbon black; a resin fine particle; and a water-soluble organic solvent, in which: the resin fine particle contains at least a unit derived from an ethylenically unsaturated hydrophobic monomer, and a unit derived from a monomer selected from an ethylenically unsaturated acid monomer and a salt thereof, and a ratio of a unit derived from a saturated alkyl group-containing monomer to the unit derived from the ethylenically unsaturated hydrophobic monomer is 95.0 mass % or more; and the water-soluble organic solvent contains a water-soluble organic solvent having a dielectric constant at 20° C. of 18.0 or more and less than 30.0.Type: GrantFiled: August 24, 2011Date of Patent: December 10, 2013Assignee: Canon Kabushiki KaishaInventors: Yuhei Shimizu, Eiichi Nakata, Hideki Takayama, Yoshio Nakajima