Patents by Inventor Sayoko Nagashima
Sayoko Nagashima 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: 20230158809Abstract: The present invention provides an ink jet recording method capable of recording an image having good abrasion resistance by using an aqueous ink and a reaction liquid. In the ink jet recording method, the aqueous ink containing a resin particle and the reaction liquid containing a reactant for aggregating the component in the aqueous ink are ejected from a recording head of the ink jet system and applied onto a recording medium. The reaction liquid contains a compound represented by the general formula (1) (n in the formula represents an integer of 0 to 3). At least one of the aqueous ink and the reaction liquid contains a surfactant having an HLB value of ? 15.Type: ApplicationFiled: August 11, 2022Publication date: May 25, 2023Inventors: Masanori Yoshida, Yoshitaka Torisaka, Satoshi Takebayashi, Eriko Yoshino, Sayoko Nagashima
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Patent number: 11104820Abstract: To provide an ink jet recording method which can record an image on a recording medium irrespective of what material is selected therefor. The ink jet recording method is a method of recording an image on a recording medium with a colorless transparent aqueous ink and includes a step of applying, to the recording medium, the aqueous ink containing a mineral acid and having a pH of 1.0 or less; and a step of forming carbon by making use of the mineral acid.Type: GrantFiled: July 15, 2019Date of Patent: August 31, 2021Assignee: Canon Kabushiki KaishaInventors: Shigemoto Abe, Mikio Sanada, Sayoko Nagashima, Yoshihide Aikawa
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Publication number: 20210187938Abstract: An inkjet recording method of the present disclosure is an inkjet recording method of recording an image on a recording medium using an aqueous ink. Coating wax on a transfer body; applying an aqueous reaction solution containing a reaction agent reacting with the aqueous ink to the transfer body; forming an intermediate image by applying the aqueous ink to the transfer body; and transferring the intermediate image by bringing the intermediate image into contact with the recording medium are included in this order, and a surface temperature Ta (° C.) of the transfer body at a position where the intermediate image contacts the recording medium, a surface temperature Tb (° C.) of the transfer body at a position where the intermediate image is separated from the transfer body and a melting point Tm (° C.) of the wax satisfy a relationship of Tb<Tm?Ta.Type: ApplicationFiled: December 14, 2020Publication date: June 24, 2021Inventors: Toru Ohnishi, Tsuyoshi Kanke, Sayoko Nagashima, Kanako Soma, Mikio Sanada, Satoshi Takebayashi, Yuko Negishi, Tetsuya Kosuge, Satoshi Kudo, Naofumi Shimomura, Ryo Taguri
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Patent number: 11001080Abstract: To provide an ink jet recording method capable of recording a high-quality image excellent in optical density and water resistance and at the same time, suppressing peeling-off of an image caused by contact heating of a recording medium. The ink jet recording method has a step of ejecting an aqueous ink containing a resin particle from a line head and applying the aqueous ink to a predetermined position of a recording medium having ink absorbability and a step of bringing a heating roller into contact with the aqueous ink applied to the recording medium to heat it and fixing it at the predetermined position. The dynamic surface tension of the aqueous ink at the time when the heating roller is brought into contact with the aqueous ink applied to the recording medium is higher than the surface tension of the heating roller.Type: GrantFiled: April 2, 2019Date of Patent: May 11, 2021Assignee: Canon Kabushiki KaishaInventors: Mikio Sanada, Shigemoto Abe, Sayoko Nagashima
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Publication number: 20200032091Abstract: To provide an ink jet recording method which can record an image on a recording medium irrespective of what material is selected therefor. The ink jet recording method is a method of recording an image on a recording medium with a colorless transparent aqueous ink and includes a step of applying, to the recording medium, the aqueous ink containing a mineral acid and having a pH of 1.0 or less; and a step of forming carbon by making use of the mineral acid.Type: ApplicationFiled: July 15, 2019Publication date: January 30, 2020Inventors: Shigemoto Abe, Mikio Sanada, Sayoko Nagashima, Yoshihide Aikawa
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Publication number: 20190308423Abstract: To provide an ink jet recording method capable of recording a high-quality image excellent in optical density and water resistance and at the same time, suppressing peeling-off of an image caused by contact heating of a recording medium. The ink jet recording method has a step of ejecting an aqueous ink containing a resin particle from a line head and applying the aqueous ink to a predetermined position of a recording medium having ink absorbability and a step of bringing a heating roller into contact with the aqueous ink applied to the recording medium to heat it and fixing it at the predetermined position. The dynamic surface tension of the aqueous ink at the time when the heating roller is brought into contact with the aqueous ink applied to the recording medium is higher than the surface tension of the heating roller.Type: ApplicationFiled: April 2, 2019Publication date: October 10, 2019Inventors: Mikio Sanada, Shigemoto Abe, Sayoko Nagashima
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Patent number: 10259964Abstract: Provided is an aqueous ink that can record an image excellent in color developability and is excellent in sticking recovery property. The aqueous ink for ink jet includes: a pigment; and a surfactant, wherein the pigment includes a self-dispersible pigment in which at least one functional group selected from the group consisting of (i) an anionic group and (ii) a group in which another atomic group and an anionic group are bonded to each other is bonded to a surface of a particle of carbon black and a density of the functional group is 0.10 ?mol/m2 or more to 0.48 ?mol/m2 or less and wherein the surfactant includes an amino acid type surfactant in which a nitrogen atom capable of becoming a cation has a structure of a secondary amine or a tertiary amine.Type: GrantFiled: May 25, 2018Date of Patent: April 16, 2019Assignee: Canon Kabushiki KaishaInventors: Sayoko Nagashima, Mikio Sanada, Shigemoto Abe
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Publication number: 20180346746Abstract: Provided is an aqueous ink that can record an image excellent in color developability and is excellent in sticking recovery property. The aqueous ink for ink jet includes: a pigment; and a surfactant, wherein the pigment includes a self-dispersible pigment in which at least one functional group selected from the group consisting of (i) an anionic group and (ii) a group in which another atomic group and an anionic group are bonded to each other is bonded to a surface of a particle of carbon black and a density of the functional group is 0.10 ?mol/m2 or more to 0.48 ?mol/m2 or less and wherein the surfactant includes an amino acid type surfactant in which a nitrogen atom capable of becoming a cation has a structure of a secondary amine or a tertiary amine.Type: ApplicationFiled: May 25, 2018Publication date: December 6, 2018Inventors: Sayoko Nagashima, Mikio Sanada, Shigemoto Abe
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Publication number: 20160280945Abstract: Provided is an ink jet ink capable of recording an image having an unprecedentedly high level of scratch resistance and excellent glossiness while satisfying reliability of the ink such as ejection stability. The ink jet ink contains at least a pigment and a graft polymer, and is characterized in that the graft polymer includes at least a specific nonionic unit and a unit having a polysiloxane structure.Type: ApplicationFiled: June 14, 2016Publication date: September 29, 2016Inventors: Fumihiko Mukae, Katsuhiro Shirota, Yoshihisa Yamashita, Masashi Tsujimura, Katsuhiko Suzuki, Hiromitsu Kishi, Takashi Saito, Hirofumi Ichinose, Sayoko Nagashima
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Patent number: 8469504Abstract: An object of the invention is to provide an ink set which enables to improve image density and scratch resistance of the images recorded using an ink containing a self-dispersion pigment and an ink containing a modified siloxane compound. An ink set to be used for ink jet recording including plural inks having a first ink and a second ink independently, wherein the first ink contains at least a pigment having functional groups on surface of pigment particles and a compound having adsorptivity to the pigment and the functional group density on the surface of the pigment particles is 1.5 ?mol/m2 or more and less than 2.6 ?mol/m2 and the second ink contains at least a pigment and a modified siloxane compound.Type: GrantFiled: July 30, 2009Date of Patent: June 25, 2013Assignee: Canon Kabushiki KaishaInventors: Takashi Saito, Katsuhiro Shirota, Hirofumi Ichinose, Hiromitsu Kishi, Masashi Tsujimura, Fumihiko Mukae, Fumiaki Fujioka, Katsuhiko Suzuki, Sayoko Nagashima
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Patent number: 8389600Abstract: Provided are an ink jet ink set, an ink jet recording method, and an ink jet recording apparatus each of which can reduce the graininess of an image to be recorded and improve the water fastness of the image even in a recording medium such as plain paper. The ink jet ink set has a first ink and a second ink independently, and is used so that the first and second inks overlap each other at least partly upon application of the inks to a recording medium. The first ink contains at least a pigment and a silicone oil. The second ink contains at least a pigment and a graft polymer that includes at least a nonionic unit represented by the general formula (I) and a unit having a polysiloxane structure.Type: GrantFiled: August 4, 2009Date of Patent: March 5, 2013Assignee: Canon Kabushiki KaishaInventors: Katsuhiko Suzuki, Katsuhiro Shirota, Hirofumi Ichinose, Masashi Tsujimura, Hiromitsu Kishi, Takashi Saito, Sayoko Nagashima, Fumihiko Mukae, Yoshihisa Yamashita
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Publication number: 20100033522Abstract: An object of the invention is to provide an ink set which enables to improve image density and scratch resistance of the images recorded using an ink containing a self-dispersion pigment and an ink containing a modified siloxane compound. An ink set to be used for ink jet recording including plural inks having a first ink and a second ink independently, wherein the first ink contains at least a pigment having functional groups on surface of pigment particles and a compound having adsorptivity to the pigment and the functional group density on the surface of the pigment particles is 1.5 ?mol/m2 or more and less than 2.6 ?mol/m2 and the second ink contains at least a pigment and a modified siloxane compound.Type: ApplicationFiled: July 30, 2009Publication date: February 11, 2010Applicant: CANON KABUSHIKI KAISHAInventors: Takashi Saito, Katsuhiro Shirota, Hirofumi Ichinose, Hiromitsu Kishi, Masashi Tsujimura, Fumihiko Mukae, Fumiaki Fujioka, Katsuhiko Suzuki, Sayoko Nagashima
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Publication number: 20100033523Abstract: Provided are an ink jet ink set, an ink jet recording method, and an ink jet recording apparatus each of which can reduce the graininess of an image to be recorded and improve the water fastness of the image even in a recording medium such as plain paper. The ink jet ink set has a first ink and a second ink independently, and is used so that the first and second inks overlap each other at least partly upon application of the inks to a recording medium. The first ink contains at least a pigment and a silicone oil. The second ink contains at least a pigment and a graft polymer that includes at least a nonionic unit represented by the general formula (I) and a unit having a polysiloxane structure.Type: ApplicationFiled: August 4, 2009Publication date: February 11, 2010Applicant: CANON KABUSHIKI KAISHAInventors: Katsuhiko Suzuki, Katsuhiro Shirota, Hirofumi Ichinose, Masashi Tsujimura, Hiromitsu Kishi, Takashi Saito, Sayoko Nagashima, Fumihiko Mukae, Yoshihisa Yamashita
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Publication number: 20100034972Abstract: Provided is an ink jet ink capable of recording an image having an unprecedentedly high level of scratch resistance and excellent glossiness while satisfying reliability of the ink such as ejection stability. The ink jet ink contains at least a pigment and a graft polymer, and is characterized in that the graft polymer includes at least a specific nonionic unit and a unit having a polysiloxane structure.Type: ApplicationFiled: August 4, 2009Publication date: February 11, 2010Applicant: CANON KABUSHIKI KAISHAInventors: Fumihiko Mukae, Katsuhiro Shirota, Yoshihisa Yamashita, Masashi Tsujimura, Katsuhiko Suzuki, Hiromitsu Kishi, Takashi Saito, Hirofumi Ichinose, Sayoko Nagashima