Patents by Inventor Kaoru Tojo
Kaoru Tojo 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: 9714356Abstract: A black ink composition includes: carbon black and a water-insoluble resin that covers at least a part of the surface of the carbon black; a cyan pigment and a water-insoluble resin that covers at least a part of the surface of the cyan pigment; a magenta pigment and a water-insoluble resin that covers at least a part of the surface of the magenta pigment; water-insoluble resin particle; and water, wherein a content ratio of the carbon black is from 1.0 to 2.0% by mass with respect to the total mass of the composition, and a total amount of pigments is from 1.8 to 3.5% by mass with respect to the total mass of the composition. The black ink composition can be used in an ink set and an image forming method.Type: GrantFiled: October 31, 2014Date of Patent: July 25, 2017Assignee: FUJIFILM CorporationInventors: Kaoru Tojo, Ryo Saito, Katsuto Sumi
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Patent number: 9309422Abstract: An ink set for inkjet recording includes: an ink composition including a pigment, a water-soluble polymerizable compound, and water; and a maintenance liquid that has a pH higher than 8.5 and that includes water and a water-soluble organic solvent having an SP value higher than 27.5 MPa1/2, the amount of water contained in the maintenance liquid being 50% by mass or more with respect to the total amount of the maintenance liquid, the amount of water-soluble organic solvent contained in the maintenance liquid having an SP value higher than 27.5 MPa1/2 being from 5 to 30% by mass with respect to the total amount of the maintenance liquid, and the amount of water-soluble organic solvent contained in the maintenance liquid having an SP value of 27.5 MPa1/2 or lower being less than 5% by mass with respect to the total amount of the maintenance liquid.Type: GrantFiled: September 2, 2013Date of Patent: April 12, 2016Assignee: FUJIFILM CorporationInventors: Orie Ito, Kaoru Tojo
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Patent number: 9126449Abstract: The image forming method of the present invention includes imparting ink to form an image on a recording medium, drying the image, and curing the image after the drying process, wherein the recording medium has one or a plurality of pigment layers on at least one surface of a support with cellulose pulp as a main component, and a transference amount of pure water into the recording medium is specific value, and the ink composition includes a pigment, water, and a water soluble polymerizable compound where the content ratio is equal to or more than 15 mass % and less than 40 mass %, and the content of a water soluble organic solvent is less than 3 mass %.Type: GrantFiled: August 3, 2012Date of Patent: September 8, 2015Assignee: FUJIFILM CorporationInventor: Kaoru Tojo
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Publication number: 20150191613Abstract: Disclosed is an ink composition for ink jet recording containing water, a pigment, a (meth)acrylamide compound, and a polymer particle made of a polymer composed of a structural unit derived from a methacrylic acid and a structural unit derived from methacrylic acid ester having an SP value of from 19.0 MPa1/2 to 25.0 MPa1/2.Type: ApplicationFiled: March 17, 2015Publication date: July 9, 2015Inventors: Kaoru TOJO, Terukazu YANAGI, Yasufumi OOISHI, Koji YASUDA, Akira TAKEDA
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Publication number: 20150062238Abstract: A black ink composition includes: carbon black and a water-insoluble resin that covers at least a part of the surface of the carbon black; a cyan pigment and a water-insoluble resin that covers at least a part of the surface of the cyan pigment; a magenta pigment and a water-insoluble resin that covers at least a part of the surface of the magenta pigment; water-insoluble resin particle; and water, wherein a content ratio of the carbon black is from 1.0 to 2.0% by mass with respect to the total mass of the composition, and a total amount of pigments is from 1.8 to 3.5% by mass with respect to the total mass of the composition. The black ink composition can be used in an ink set and an image forming method.Type: ApplicationFiled: October 31, 2014Publication date: March 5, 2015Applicant: FUJIFILM CORPORATIONInventors: Kaoru TOJO, Ryo SAITO, Katsuto SUMI
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Patent number: 8870339Abstract: The present invention provides an inkjet image forming method including: forming an image by applying an ink composition containing a first color material and water onto a recording medium; and applying a treatment liquid containing a wax and water onto the image, wherein the treatment liquid contains a second color material, and the first color material and the second color material may be the same or different.Type: GrantFiled: February 21, 2011Date of Patent: October 28, 2014Assignee: FUJIFILM CorporationInventors: Kaoru Tojo, Minoru Sakai, Tomoyuki Ohzeki
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Patent number: 8746865Abstract: An image forming method including applying an ink composition onto a recording medium by an inkjet method, and applying an liquid including particles onto the recording medium is disclosed.Type: GrantFiled: March 29, 2011Date of Patent: June 10, 2014Assignee: FUJIFILM CorporationInventors: Kaoru Tojo, Toshihiro Kariya, Terukazu Yanagi, Akio Tamura, Minoru Sakai
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Patent number: 8727521Abstract: There is disclosed an inkjet image forming method. The method includes recording an image on a recording medium by an inkjet method; supplying a liquid including powder particles having a volume-average particle diameter of 1 ?m or more to a surface of a heating roller; and applying the powder particles onto the recording medium via the heating roller.Type: GrantFiled: March 29, 2011Date of Patent: May 20, 2014Assignee: FUJIFILM CorporationInventors: Toshihiro Kariya, Kaoru Tojo
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Patent number: 8703239Abstract: The invention provides an image forming method having at least: applying, onto a recording medium, an ink composition containing at least a water-soluble organic solvent, a pigment, a polymer particle and water; and removing at least a part of the water-soluble organic solvent from the ink composition on the recording medium. The water-soluble organic solvent contains at least a water-soluble organic solvent having a vapor pressure of less than 10 Pa at 20° C., a boiling temperature of less than 260° C., and an SP value of less than 25, at a content of 30 mass % or more with respect to the total water-soluble organic solvent content of the ink composition.Type: GrantFiled: August 27, 2009Date of Patent: April 22, 2014Assignee: FUJIFILM CorporationInventors: Tomoyuki Ohzeki, Yoshimitsu Arai, Kaoru Tojo, Masao Ikoshi
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Publication number: 20140092168Abstract: An ink set for inkjet recording includes: an ink composition including a pigment, a water-soluble polymerizable compound, and water; and a maintenance liquid that has a pH higher than 8.5 and that includes water and a water-soluble organic solvent having an SP value higher than 27.5 MPa1/2, the amount of water contained in the maintenance liquid being 50% by mass or more with respect to the total amount of the maintenance liquid, the amount of water-soluble organic solvent contained in the maintenance liquid having an SP value higher than 27.5 MPa1/2 being from 5 to 30% by mass with respect to the total amount of the maintenance liquid, and the amount of water-soluble organic solvent contained in the maintenance liquid having an SP value of 27.5 MPa1/2 or lower being less than 5% by mass with respect to the total amount of the maintenance liquid.Type: ApplicationFiled: September 2, 2013Publication date: April 3, 2014Applicant: FUJIFILM CORPORATIONInventors: Orie ITO, Kaoru TOJO
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Patent number: 8450394Abstract: An ink composition for ink-jet recording includes a pigment; resin particles having a glass transition temperature of 80° C. or higher; at least one water-soluble organic solvent; and water, and a total mass of solid content in the ink composition for ink-jet recording is 10% by mass or more relative to the ink composition for ink-jet recording, and the at least one water-soluble organic solvent includes at least one organic solvent having an SP value of 27.5 or lower, the amount of the at least one organic solvent having an SP value of 27.5 or lower being 70% by mass or more relative to a total amount of the at least one water-soluble organic solvent. An ink-jet recording method is also provided.Type: GrantFiled: March 2, 2010Date of Patent: May 28, 2013Assignee: FUJIFILM CorporationInventors: Kaoru Tojo, Yasufumi Ooishi, Kyohei Mochizuki, Kiyoshi Irita
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Patent number: 8399545Abstract: An aqueous ink for inkjet recording is provided. The aqueous ink ensures that the ejection accuracy in inkjet recording is excellent and helps suppress generation of density unevenness and streak unevenness, even after storage for a long period of time or exposure to high temperatures. The aqueous ink for inkjet recording contains vinyl polymer particles containing components A and B and a water-soluble solvent. Component A is an azo pigment having a specific structure, its tautomer, or a salt or hydrate thereof; and Component B is a vinyl polymer containing (a) a hydrophobic structural unit having an aromatic ring bonded to the polymer main chain through a linking group and (b) a hydrophilic structural unit.Type: GrantFiled: August 27, 2009Date of Patent: March 19, 2013Assignee: FUJIFILM CorporationInventors: Keiichi Tateishi, Kaoru Tojo, Kiyoshi Morimoto
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Publication number: 20130050369Abstract: The image forming method of the present invention includes imparting ink to form an image on a recording medium, drying the image, and curing the image after the drying process, wherein the recording medium has one or a plurality of pigment layers on at least one surface of a support with cellulose pulp as a main component, and a transference amount of pure water into the recording medium is specific value, and the ink composition includes a pigment, water, and a water soluble polymerizable compound where the content ratio is equal to or more than 15 mass % and less than 40 mass %, and the content of a water soluble organic solvent is less than 3 mass %.Type: ApplicationFiled: August 3, 2012Publication date: February 28, 2013Applicant: FUJIFILM CORPORATIONInventor: Kaoru TOJO
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Patent number: 8371687Abstract: The invention provides an ink composition containing at least: a water-soluble organic solvent; a pigment; water; and a nonionic polymer thickener. The content of the water-soluble organic solvent is from 5 weight % to 30 weight % relative to the total amount of the ink composition. The ratio of Vhigh/Vlow, in which Vhigh represents 25° C. viscosity (mPa·s) measured at a shear rate of 1.5×105 (s?1) and Vlow represents 25° C. viscosity (mPa·s) measured at a shear rate of 3.0×103 (s?1), is from 0.70 to 0.95. The invention further provides an image formation method including at least ejecting the ink composition onto an image recording medium using an image formation apparatus to form an image on the image recording medium.Type: GrantFiled: December 18, 2009Date of Patent: February 12, 2013Assignee: FUJIFILM CorporationInventors: Kaoru Tojo, Masao Ikoshi, Teppei Yamamoto
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Patent number: 8361213Abstract: The present invention provides an ink composition comprising pigment particles covered with a water-insoluble resin, resin particles, a water-soluble organic solvent, water, and a solid wetting agent in an amount of 5% by mass or more.Type: GrantFiled: March 9, 2009Date of Patent: January 29, 2013Assignee: FUJIFILM CorporationInventor: Kaoru Tojo
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Patent number: 8272732Abstract: An image forming method is disclosed, which includes applying a treatment liquid onto a recording medium that has a coated layer and has an area of 1,250 cm2 or more, applying an ink composition including a pigment and resin particles having a glass transition temperature (Tg) of 100° C. or higher onto the recording medium onto which the treatment liquid has been applied and which is conveyed at a conveyance speed of 200 mm/s or higher, heating and drying the applied treatment liquid and ink composition, cooling the recording medium that has been subjected to the heating and drying, to a temperature of 35° C. or lower, and accumulating the recording medium that has been subjected to the cooling, into an accumulation unit.Type: GrantFiled: October 13, 2010Date of Patent: September 25, 2012Assignee: FUJIFILM CorporationInventors: Terukazu Yanagi, Kaoru Tojo, Yuhei Chiwata
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Patent number: 8227054Abstract: A recording medium including a base paper, a first layer containing a binder, and a second layer containing a white pigment and an acid, formed in this order, wherein the base paper having the first layer provided thereon has a Cobb water absorbency of 2.0 g/m2 or below at the surface of the first layer as determined under a contact time of 120 seconds by a water absorbency test in accordance with JIS P8140, the recording medium has a water absorption amount of from 2 mL/m2 to 8 mL/m2 at the surface of the second layer as determined under a contact time of 0.5 seconds in accordance with the Bristow method, and the pH at the surface of the second layer is 5.5 or below.Type: GrantFiled: November 17, 2008Date of Patent: July 24, 2012Assignee: FUJIFILM CorporationInventors: Wataru Ono, Kiyoshi Irita, Kaoru Tojo
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Publication number: 20120165436Abstract: A pigment dispersion including vinyl polymer particles containing A and B: A: an azo pigment represented by the following formula (1), a tautomer thereof, a salt thereof, a hydrate thereof, or a solvate thereof; B: a vinyl polymer containing a structural unit (a) having a non-aromatic alicyclic group bonded to the polymer main chain via a linking group, and a structural unit (b) having a hydrophilic group, wherein the substituents are as defined in the specification.Type: ApplicationFiled: September 2, 2010Publication date: June 28, 2012Applicant: FUJIFILM CORPORATIONInventors: Shigeaki Tanaka, Keiichi Tateishi, Kiyoshi Morimoto, Kaoru Tojo
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Patent number: 8158212Abstract: An ink composition is provided that includes (A) an N-vinyllactam, (B) another polymerizable compound, (C) a polymerization initiator, and (D) a basic compound, the content of the N-vinyllactam (A) being less than 15 wt % of the total weight of the ink composition. There is also provided an inkjet recording method that includes (a1) a step of discharging the ink composition onto a recording medium and (b1) a step of curing the ink composition by irradiating the discharged ink composition with actinic radiation. There is also provided a printed material recorded by the inkjet recording method.Type: GrantFiled: February 15, 2008Date of Patent: April 17, 2012Assignee: FUJIFILM CorporationInventors: Kaoru Tojo, Hironori Ohnishi
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Publication number: 20120076951Abstract: A black ink composition includes: carbon black and a water-insoluble resin that covers at least a part of the surface of the carbon black; a cyan pigment and a water-insoluble resin that covers at least a part of the surface of the cyan pigment; a magenta pigment and a water-insoluble resin that covers at least a part of the surface of the magenta pigment; water-insoluble resin particle; and water, wherein a content ratio of the carbon black is from 1.0 to 2.0% by mass with respect to the total mass of the composition, and a total amount of pigments is from 1.8 to 3.5% by mass with respect to the total mass of the composition. The black ink composition can be used in an ink set and an image forming method.Type: ApplicationFiled: August 31, 2011Publication date: March 29, 2012Applicant: FUJIFILM CORPORATIONInventors: Kaoru TOJO, Ryo SAITO, Katsuto SUMI