Patents by Inventor Itaru Tsuji
Itaru Tsuji 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: 10266714Abstract: An aqueous ink used in an ink jet recording method that uses thermal energy to eject an ink from a recording head includes a copper phthalocyanine pigment and a urethane resin. The urethane resin has a unit derived from a polyisocyanate, a unit derived from a polyether polyol having no acid group, a unit derived from a polyol having an acid group and a unit derived from a polyamine; in the urethane resin, the proportion of the urethane bond relative to the total amount of the urethane bond and the urea bond derived from the polyamine is 90.0% by mole or more to 99.0% by mole or less; and the urethane resin has a weight-average molecular weight of 20,000 or less and an acid value of 50 mg KOH/g or more to 110 mg KOH/g or less.Type: GrantFiled: March 6, 2018Date of Patent: April 23, 2019Assignee: Canon Kabushiki KaishaInventors: Itaru Tsuji, Yuki Nishino, Kousuke Yamasaki
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Publication number: 20180258303Abstract: An aqueous ink used in an ink jet recording method that uses thermal energy to eject an ink from a recording head includes a copper phthalocyanine pigment and a urethane resin. The urethane resin has a unit derived from a polyisocyanate, a unit derived from a polyether polyol having no acid group, a unit derived from a polyol having an acid group and a unit derived from a polyamine; in the urethane resin, the proportion of the urethane bond relative to the total amount of the urethane bond and the urea bond derived from the polyamine is 90.0% by mole or more to 99.0% by mole or less; and the urethane resin has a weight-average molecular weight of 20,000 or less and an acid value of 50 mg KOH/g or more to 110 mg KOH/g or less.Type: ApplicationFiled: March 6, 2018Publication date: September 13, 2018Inventors: Itaru Tsuji, Yuki Nishino, Kousuke Yamasaki
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Patent number: 9573361Abstract: An image-forming method includes a reaction solution-applying step of applying a reaction solution containing a thickening agent and a colorant-aggregating component aggregating a colorant in ink to an intermediate transfer medium, a first ink-applying step of applying a first ink to the intermediate transfer medium provided with the reaction solution, a second ink-applying step of applying a second ink to the intermediate transfer medium provided with the first ink, and a transfer step of transferring an intermediate image formed on the intermediate transfer medium provided with the second ink to a recording medium. An ink layer formed on the intermediate transfer medium by applying the first ink thereto has a yield value of 0.5 Pa or more.Type: GrantFiled: October 3, 2012Date of Patent: February 21, 2017Assignee: Canon Kabushiki KaishaInventors: Shinsuke Tsuji, Tsuyoshi Kanke, Takashi Imai, Yuichiro Kanasugi, Itaru Tsuji
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Patent number: 9493664Abstract: An ink jet recording method including recording a secondary color image on a recording medium using a first ink and a second ink, wherein the first ink contains a first self-dispersible pigment having a functional group that contains a phosphonic acid group and is bonded to a particle surface of the pigment, the second ink contains a second self-dispersible pigment having a functional group that contains at least one acidic group of a sulfonic acid group and a carboxylic acid group and is bonded to a particle surface of the pigment. The method includes a step of overlappingly applying the first ink and the second ink in this order to the recording medium. The time difference between applications of the first ink and the second ink to the recording medium is 30 milliseconds or less.Type: GrantFiled: December 9, 2014Date of Patent: November 15, 2016Assignee: Canon Kabushiki KaishaInventors: Itaru Tsuji, Yuki Nishino
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Publication number: 20150184009Abstract: An ink jet recording method including recording a secondary color image on a recording medium using a first ink and a second ink, wherein the first ink contains a first self-dispersible pigment having a functional group that contains a phosphonic acid group and is bonded to a particle surface of the pigment, the second ink contains a second self-dispersible pigment having a functional group that contains at least one acidic group of a sulfonic acid group and a carboxylic acid group and is bonded to a particle surface of the pigment. The method includes a step of overlappingly applying the first ink and the second ink in this order to the recording medium. The time difference between applications of the first ink and the second ink to the recording medium is 30 milliseconds or less.Type: ApplicationFiled: December 9, 2014Publication date: July 2, 2015Inventors: Itaru Tsuji, Yuki Nishino
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Patent number: 7868060Abstract: Provided is an aqueous ink with high storage stability and scratch resistance at such a high level that the coloring material of an image is not scraped off even when lightly touched with a sharp product. The aqueous ink includes a water-insoluble coloring material and plural polymers. The plural polymers include a polymer A which relatively contributes to dispersion of the water-insoluble coloring material and a polymer B which does not relatively contribute to the dispersion of the water-insoluble coloring material compared to the polymer A. The polymer A includes a block copolymer having an acid value of 120 mgKOH/g to 180 mgKOH/g and having an ethylene oxide group as a nonionic group. The polymer B has an acid value of 150 mgKOH/g or less and a hydrogen bond parameter (?h) of the polymer obtained by solubility parameters of monomers constituting the polymer of 1.0 cal0.5/cm1.5 or more and 3.2 cal0.5/cm1.5 or less.Type: GrantFiled: February 1, 2008Date of Patent: January 11, 2011Assignee: Canon Kabushiki KaishaInventors: Junichi Sakai, Kousuke Yamasaki, Katsuhiko Suzuki, Itaru Tsuji, Aki Takano, Hideki Takayama, Shin-ichi Sato
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Publication number: 20080187726Abstract: Provided is an aqueous ink with high storage stability and scratch resistance at such a high level that the coloring material of an image is not scraped off even when lightly touched with a sharp product. The aqueous ink includes a water-insoluble coloring material and plural polymers. The plural polymers include a polymer A which relatively contributes to dispersion of the water-insoluble coloring material and a polymer B which does not relatively contribute to the dispersion of the water-insoluble coloring material compared to the polymer A. The polymer A includes a block copolymer having an acid value of 120 mgKOH/g to 180 mgKOH/g and having an ethylene oxide group as a nonionic group. The polymer B has an acid value of 150 mgKOH/g or less and a hydrogen bond parameter (?h) of the polymer obtained by solubility parameters of monomers constituting the polymer of 1.0 cal0.5/cm1.5 or more and 3.2 cal0.5/cm1.5 or less.Type: ApplicationFiled: February 1, 2008Publication date: August 7, 2008Applicant: CANON KABUSHIKI KAISHAInventors: Junichi Sakai, Kousuke Yamasaki, Katsuhiko Suzuki, Itaru Tsuji, Aki Takano, Hideki Takayama, Shin-ichi Sato
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Patent number: 7297203Abstract: An ink to be used in an ink jet recording method of ejecting an ink from a recording head through action of thermal energy can improve the ink ejection stability and shows a high storage stability and a high color developability. An ink to be used in an ink jet recording method of ejecting an ink from a recording head through action of thermal energy is characterized in that the ink comprises a pigment represented by the general formula (1), a dispersant, a water-soluble organic compound and an aggregation inhibiting substance for inhibiting aggregation after dispersion breakdown of the pigment, and the content (mass %) of the aggregation inhibiting substance with respect to the total mass of ink is 0.4 times or more to less than 1.Type: GrantFiled: April 24, 2006Date of Patent: November 20, 2007Assignee: Canon Kabushiki KaishaInventors: Yoichi Takada, Nobuyuki Matsumoto, Itaru Tsuji, Yuko Takada, Shinichi Hakamada, Sadayuki Sugama, Masashi Tsujimura, Fumiaki Fujioka
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Patent number: 7291214Abstract: An ink to be used in an ink jet recording method of ejecting an ink from a recording head through action of thermal energy can improve the ink ejection stability. An ink to be used in an ink jet recording method of ejecting an ink from a recording head through action of thermal energy is characterized in that the ink comprises a pigment represented by the general formula (1), a dispersant and a water-soluble organic compound, and the pigment substantially shows neither an exothermic peak nor an endothermic peak in the range 25° C. or more to 200° C.Type: GrantFiled: May 2, 2006Date of Patent: November 6, 2007Assignee: Canon Kabushiki KaishaInventors: Itaru Tsuji, Yoshio Nakajima, Shinichi Hakamada, Yoichi Takada
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Patent number: 7244299Abstract: An ink jet recording ink comprising at least a copper phthalocyanine dye represented by the following general formula (1) and a compound represented by the following general formula (2):Type: GrantFiled: September 26, 2005Date of Patent: July 17, 2007Assignee: Canon Kabushiki KaishaInventors: Itaru Tsuji, Shinichi Tochihara, Hiroshi Tomioka, Koichi Osumi, Hiroyuki Takuhara, Minako Kawabe, Hideki Yamakami
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Patent number: 7208033Abstract: An ink comprising yellow colorants and a colorant having a phthalocyanine skeleton, in which the yellow colorants are at least a colorant represented by the following general formula I and C.I.Type: GrantFiled: September 23, 2005Date of Patent: April 24, 2007Assignee: Canon Kabushiki KaishaInventors: Minako Kawabe, Koichi Osumi, Shinichi Tochihara, Hiroshi Tomioka, Hiroyuki Takuhara, Hideki Yamakami, Itaru Tsuji
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Publication number: 20060196389Abstract: An ink to be used in an ink jet recording method of ejecting an ink from a recording head through action of thermal energy can improve the ink ejection stability. An ink to be used in an ink jet recording method of ejecting an ink from a recording head through action of thermal energy is characterized in that the ink comprises a pigment represented by the general formula (1), a dispersant and a water-soluble organic compound, and the pigment substantially shows neither an exothermic peak nor an endothermic peak in the range 25° C. or more to 200° C. or less of a DSC curve obtained by means of a differential scanning calorimeter (DSC).Type: ApplicationFiled: May 2, 2006Publication date: September 7, 2006Applicant: Canon Kabushiki KaishaInventors: Itaru Tsuji, Yoshio Nakajima, Shinichi Hakamada, Yoichi Takada
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Publication number: 20060192827Abstract: An ink to be used in an ink jet recording method of ejecting an ink from a recording head through action of thermal energy can improve the ink ejection stability and shows a high storage stability and a high color developability. An ink to be used in an ink jet recording method of ejecting an ink from a recording head through action of thermal energy is characterized in that the ink comprises a pigment represented by the general formula (1), a dispersant, a water-soluble organic compound and an aggregation inhibiting substance for inhibiting aggregation after dispersion breakdown of the pigment, and the content (mass %) of the aggregation inhibiting substance with respect to the total mass of ink is 0.4 times or more to less than 1.3 times of the content (mass %) of the pigment with respect to the total mass of ink.Type: ApplicationFiled: April 24, 2006Publication date: August 31, 2006Applicant: Canon Kabushiki KaishaInventors: Yoichi Takada, Nobuyuki Matsumoto, Itaru Tsuji, Yuko Takada, Shinichi Hakamada, Sadayuki Sugama, Masashi Tsujimura, Fumiaki Fujioka
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Publication number: 20060065157Abstract: An ink comprising yellow colorants and a colorant having a phthalocyanine skeleton, in which the yellow colorants are at least a colorant represented by the following general formula I and C.I. Direct Yellow 132.Type: ApplicationFiled: September 23, 2005Publication date: March 30, 2006Applicant: Canon Kabushiki KaishaInventors: Minako Kawabe, Koichi Osumi, Shinichi Tochihara, Hiroshi Tomioka, Hiroyuki Takuhara, Hideki Yamakami, Itaru Tsuji
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Publication number: 20060011097Abstract: An ink jet recording ink comprising at least a copper phthalocyanine dye represented by the following general formula (1) and a compound represented by the following general formula (2):Type: ApplicationFiled: September 26, 2005Publication date: January 19, 2006Applicant: Canon Kabushiki KaishaInventors: Itaru Tsuji, Shinichi Tochihara, Hiroshi Tomioka, Koichi Osumi, Hiroyuki Takuhara, Minako Kawabe, Hideki Yamakami
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Publication number: 20050043434Abstract: The present invention provides a dispersible colorant having a sufficiently high dispersion stability with a high functional group density on the surface and a resin component present on the surface, the resin component not separating from the surface, and a method for simply producing the same. The present invention also provides an aqueous ink containing the excellent, dispersible colorant, ink tank, ink jet recorder, ink jet recording method and inkjet recorded images. The dispersible colorant comprises a colorant and chargeable resin pseudo fine particles having a smaller size than the colorant, and the colorant and particles are fixed to each other.Type: ApplicationFiled: December 26, 2003Publication date: February 24, 2005Inventors: Yoko Ichinose, Masashi Miyagawa, Hirofumi Ichinose, Itaru Tsuji, Junichi Sakai, Yoshio Nakajima
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Publication number: 20040244622Abstract: The present invention provides a dispersible colorant having a sufficiently high dispersion stability with a high functional group density on the surface and a resin component present on the surface, the resin component not separating from the surface, and a method for simply producing the same. The present invention also provides an aqueous ink containing the excellent, dispersible colorant, ink tank, ink jet recorder, ink jet recording method and inkjet recorded images. The dispersible colorant comprises a colorant and chargeable resin pseudo fine particles having a smaller size than the colorant, and the colorant and particles are fixed to each other.Type: ApplicationFiled: June 15, 2004Publication date: December 9, 2004Applicant: Canon Kabushiki KaishaInventors: Yoko Ichinose, Masashi Miyagawa, Hirofumi Ichinose, Itaru Tsuji, Junichi Sakai, Yoshio Nakajima