Patents by Inventor Masashi Tsujimura
Masashi Tsujimura 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: 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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Patent number: 7517073Abstract: To suppress curling phenomenon of a recording medium to which a liquid composition is applied while securing ejection stability. A liquid composition for used in an image recording method including the steps of applying an ink containing a colorant in a dissolved state or a dispersed state to a recording medium and applying to the recording medium a liquid composition which destabilizes the dissolved state or the dispersed state of the colorant in the ink by coming into contact with the ink, the liquid composition including at least a polyvalent metal ion, water, and water-soluble organic compounds 1 and 2, in which a content X (mass %) of the water-soluble organic compound 1 in the liquid composition is 15 mass % or more, and the content X (mass %) of the water-soluble organic compound 1 in the liquid composition and a content Y (mass %) of the water-soluble organic compound 2 in the liquid composition satisfy a specific relationship.Type: GrantFiled: September 14, 2005Date of Patent: April 14, 2009Assignee: Canon Kabushiki KaishaInventors: Yasuhiro Nito, Shinichi Hakamada, Koromo Shirota, Kenji Shinjo, Yutaka Kurabayashi, Masashi Tsujimura
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Publication number: 20080193659Abstract: A liquid composition which can achieve superior scratch resistance of images at such a level that coloring materials are hardly scraped off even when images are scratched with finger nails under application of such strong pressure as to scratch a recording medium at its non-recorded areas. The liquid composition contains at least a modified siloxane compound having specific structure and a polymer whose acid value and hydrogen bond parameter (?h) are specified.Type: ApplicationFiled: February 5, 2008Publication date: August 14, 2008Applicant: CANON KABUSHIKI KAISHAInventors: Yuko Takada, Masashi Tsujimura, Katsuhiro Shirota, Shinichi Hakamada, Maiko Yamada, Sayoko Harigaya
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PIGMENT INK, INK JET RECORDING METHOD, INK CARTRIDGE, RECORDING UNIT AND INK JET RECORDING APPARATUS
Publication number: 20080193647Abstract: A pigment ink is provided which has good ink reliability and storage stability and can achieve superior scratch resistance of images at such a level that coloring materials are hardly scraped off even when images are scratched with finger nails under application of such strong pressure as to scratch a recording medium at its non-recorded areas. The pigment ink contains a pigment, a modified siloxane compound having a specific structure, and a polymer whose acid value and hydrogen bond parameter (?h) are specified.Type: ApplicationFiled: February 5, 2008Publication date: August 14, 2008Applicant: CANON KABUSHIKI KAISHAInventors: Takashi Saito, Katsuhiro Shirota, Shinichi Hakamada, Masashi Tsujimura, Fumihiko Mukae, Katsuhiko Suzuki -
Publication number: 20080152827Abstract: An aqueous ink comprising water, a water-soluble organic solvent and at least two pigments. The aqueous ink is used together with a reaction liquid containing a reactive component that reacts with the aqueous ink to cause aggregation or gelation of the aqueous ink. The at least two pigments have a difference in precipitation value to the reaction liquid of 0.2 or less.Type: ApplicationFiled: December 18, 2007Publication date: June 26, 2008Applicant: CANON KABUSHIKI KAISHAInventors: Shinichi Hakamada, Yoichi Takada, Yasuhiro Nito, Masashi Tsujimura, Toshifumi Akasaka, Shinya Mishina
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Patent number: 7377631Abstract: An aqueous ink, by which stable ink-jet recording can be conducted irrespective of printing environment, a substantially even image having abrasion resistance can be formed, no image soiling is caused even upon double-side printing, and a high-quality image improved in unclearness at a contour portion of the image and free from occurrence of color bleed can be provided, is provided. The aqueous ink is an aqueous ink used in a system that a reaction liquid containing at least a polyvalent metal and an aqueous ink containing at least a pigment dispersion, in which a pigment is dispersed with an anionic polymer dispersant, are used to form an image, wherein the aqueous ink satisfies specific condition.Type: GrantFiled: September 14, 2005Date of Patent: May 27, 2008Assignee: Canon Kabushiki KaishaInventors: Yoichi Takada, Junichi Sakai, Fumiaki Fujioka, Yasuhiro Nito, Masashi Tsujimura, Takashi Imai, Shinichi Hakamada, Sadayuki Sugama, Shinya Mishina
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Patent number: 7354145Abstract: A reaction solution to be used for image recording with an ink containing a coloring material in a dissolved or dispersed state in order to achieve a high level of image density with stability, wherein the reaction solution contains a polyvalent metal ion and an organic solvent to destabilize the dissolved or dispersed state of the coloring material in the ink in contact with the ink, has a pH of 2 or higher, and has a buffering action for pH, wherein the buffering action means it can maintain pH variation within the range of 0.5 before and after the addition of 1.0 ml of a 0.1 N aqueous lithium hydroxide solution to 50 ml of the reaction solution.Type: GrantFiled: May 25, 2005Date of Patent: April 8, 2008Assignee: Canon Kabushiki KaishaInventors: Yasuhiro Nito, Shinya Mishina, Shinichi Hakamada, Yoichi Takada, Toshifumi Akasaka, Masashi Tsujimura
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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: 7276110Abstract: A cyan ink applicable to an ink set has plurality of aqueous inks each containing at least: water; a water-insoluble coloring material; and plurality of water-soluble organic solvents including a good medium or good mediums for the water-insoluble coloring material and a poor medium or poor mediums for the water-insoluble coloring material. A ratio of a poor medium to a good medium in the cyan ink is in a specific range. A water-soluble organic solvent showing the maximum Ka value out of respective Ka values of the plurality of water-soluble organic solvents is the poor medium. A ratio of a poor medium to a good medium in an arbitrary aqueous ink in the ink set except the cyan ink and the ratio of the poor medium to the good medium in the cyan ink satisfy a specific relationship.Type: GrantFiled: December 22, 2005Date of Patent: October 2, 2007Assignee: Canon Kabushiki KaishaInventors: Masashi Tsujimura, Mikio Sanada, Yasuhiro Nito, Sadayuki Sugama
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AQUEOUS INK, INK-JET RECORDING METHOD, INK CARTRIDGE, RECORDING UNIT AND INK JET RECORDING APPARATUS
Publication number: 20070191508Abstract: An aqueous ink to be used in an ink jet recording method that an ink is ejected from a recording head by the action of thermal energy, wherein the ink contains a pigment, a polymer and a water-soluble organic solvent, the hydrophilicity ?m of the pigment falls within a range of from 21.5 or more to 23.5 or less, and the content (mass %) of the water-soluble organic solvent is from 5.0 mass % or more to 17.5 mass % or less with respect to the whole mass of the aqueous ink.Type: ApplicationFiled: February 13, 2007Publication date: August 16, 2007Applicant: Canon Kabushiki KaishaInventors: Kouhei Nakagawa, Shinichi Hakamada, Tetsu Iwata, Masashi Ogasawara, Masashi Tsujimura, Shuichi Okazaki -
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: 20060096498Abstract: A cyan ink applicable to an ink set has plurality of aqueous inks each containing at least: water; a water-insoluble coloring material; and plurality of water-soluble organic solvents including a good medium or good mediums for the water-insoluble coloring material and a poor medium or poor mediums for the water-insoluble coloring material. A ratio of a poor medium to a good medium in the cyan ink is in a specific range. A water-soluble organic solvent showing the maximum Ka value out of respective Ka values of the plurality of water-soluble organic solvents is the poor medium. A ratio of a poor medium to a good medium in an arbitrary aqueous ink in the ink set except the cyan ink and the ratio of the poor medium to the good medium in the cyan ink satisfy a specific relationship.Type: ApplicationFiled: December 22, 2005Publication date: May 11, 2006Applicant: CANON KABUSHIKI KAISHAInventors: Masashi Tsujimura, Mikio Sanada, Yasuhiro Nito, Sadayuki Sugama
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Publication number: 20060007289Abstract: To suppress curling phenomenon of a recording medium to which a liquid composition is applied while securing ejection stability. A liquid composition for used in an image recording method including the steps of applying an ink containing a colorant in a dissolved state or a dispersed state to a recording medium and applying to the recording medium a liquid composition which destabilizes the dissolved state or the dispersed state of the colorant in the ink by coming into contact with the ink, the liquid composition including at least a polyvalent metal ion, water, and water-soluble organic compounds 1 and 2, in which a content X (mass %) of the water-soluble organic compound 1 in the liquid composition is 15 mass % or more, and the content X (mass %) of the water-soluble organic compound 1 in the liquid composition and a content Y (mass %) of the water-soluble organic compound 2 in the liquid composition satisfy a specific relationship.Type: ApplicationFiled: September 14, 2005Publication date: January 12, 2006Applicant: Canon Kabushiki KaishaInventors: Yasuhiro Nito, Shinichi Hakamada, Koromo Shirota, Kenji Shinjo, Yutaka Kurabayashi, Masashi Tsujimura
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Publication number: 20060007288Abstract: An aqueous ink, by which stable ink-jet recording can be conducted irrespective of printing environment, a substantially even image having abrasion resistance can be formed, no image soiling is caused even upon double-side printing, and a high-quality image improved in unclearness at a contour portion of the image and free from occurrence of color bleed can be provided, is provided. The aqueous ink is an aqueous ink used in a system that a reaction liquid containing at least a polyvalent metal and an aqueous ink containing at least a pigment dispersion, in which a pigment is dispersed with an anionic polymer dispersant, are used to form an image, wherein the aqueous ink satisfies specific condition.Type: ApplicationFiled: September 14, 2005Publication date: January 12, 2006Applicant: Canon Kabushiki KaishaInventors: Yoichi Takada, Junichi Sakai, Fumiaki Fujioka, Yasuhiro Nito, Masashi Tsujimura, Takashi Imai, Shinichi Hakamada, Sadayuki Sugama, Shinya Mishina
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Publication number: 20050219341Abstract: A reaction solution to be used for image recording with an ink containing a coloring material in a dissolved or dispersed state in order to achieve a high level of image density with stability, wherein the reaction solution contains a polyvalent metal ion and an organic solvent to destabilize the dissolved or dispersed state of the coloring material in the ink in contact with the ink, has a pH of 2 or higher, and has a buffering action for pH, wherein the buffering action means it can maintain pH variation within the range of 0.5 before and after the addition of 1.0 ml of a 0.1 N aqueous lithium hydroxide solution to 50 ml of the reaction solution.Type: ApplicationFiled: May 25, 2005Publication date: October 6, 2005Applicant: CANON KABUSHIKI KAISHAInventors: Yasuhiro Nito, Shinya Mishina, Shinichi Hakamada, Yoichi Takada, Toshifumi Akasaka, Masashi Tsujimura
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Patent number: 6935732Abstract: A reaction solution that is used for image recording with an ink containing a coloring material in a dissolved or dispersed state to destabilize the dissolved or dispersed state of the coloring material in the ink in contact with the ink to provide high quality and abrasion-resistant images, wherein the reaction solution contains at least a polyvalent metal ion and a nonionic polymer, the Ka value according to the Bristow method is from 1.3 mL·m?2·msec?1/2 to 3.0 mL·m?2·msec?1/2 inclusive, and the viscosity is from 20 mPa·s to 150 mPa·s inclusive.Type: GrantFiled: September 16, 2003Date of Patent: August 30, 2005Assignee: Canon Kabushiki KaishaInventors: Yoichi Takada, Shinya Mishina, Shinichi Hakamada, Noriyasu Asaki, Yasuhiro Nito, Masashi Tsujimura, Takashi Imai
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Patent number: 6932465Abstract: A reaction solution to be used for image recording with an ink containing a coloring material in a dissolved or dispersed state in order to achieve a high level of image density with stability, wherein the reaction solution contains a polyvalent metal ion and an organic solvent to destabilize the dissolved or dispersed state of the coloring material in the ink in contact with the ink, has a pH of 2 or higher, and has a buffering action for pH, wherein the buffering action means it can maintain pH variation within the range of 0.5 before and after the addition of 1.0 ml of a 0.1 N aqueous lithium hydroxide solution to 50 ml of the reaction solution.Type: GrantFiled: September 15, 2003Date of Patent: August 23, 2005Assignee: Canon Kabushiki KaishaInventors: Yasuhiro Nito, Shinya Mishina, Shinichi Hakamada, Yoichi Takada, Toshifumi Akasaka, Masashi Tsujimura
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Patent number: 6929362Abstract: An ink set including a water-based ink containing a coloring material in a state dissolved or dispersed in an aqueous medium and a water-based reactive liquid containing a first component for insolubilizing or aggregating the coloring material in the ink by mixing with the water-based ink. The water-based reactive liquid contains a water-soluble high-molecular compound in a state dissolved therein. The water-based ink contains a second component, which is not insolubilized by the first component and the coloring material, in a state dissolved therein. The water-soluble high-molecular compound is not insolubilized by the first component and the coloring material but insolubilized by the second component.Type: GrantFiled: December 16, 2003Date of Patent: August 16, 2005Assignee: Canon Kabushiki KaishaInventors: Yoichi Takada, Shinya Mishina, Shinichi Hakamada, Yasuhiro Nito, Masashi Tsujimura
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Publication number: 20040125185Abstract: An ink set comprises a water-based ink containing a coloring material in a state dissolved or dispersed in an aqueous medium and a water-based reactive liquid containing a first component for insolubilizing or aggregating the coloring material in the ink by mixing with the water-based ink. The water-based reactive liquid contains a water-soluble high-molecular compound in a state dissolved therein. The water-based ink contains a second component, which is not insolubilized by the first component and the coloring material, in a state dissolved therein. The water-soluble high-molecular compound is not insolubilized by the first component and the coloring material but insolubilized by the second component.Type: ApplicationFiled: December 16, 2003Publication date: July 1, 2004Applicant: Canon Kabushiki KaishaInventors: Yoichi Takada, Shinya Mishina, Shinichi Hakamada, Yasuhiro Nito, Masashi Tsujimura
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Publication number: 20040119800Abstract: A reaction solution that is used for image recording with an ink containing a coloring material in a dissolved or dispersed state to destabilize the dissolved or dispersed state of the coloring material in the ink in contact with the ink to provide high quality and abrasion-resistant images, wherein the reaction solution contains at least a polyvalent metal ion and a nonionic polymer, the Ka value according to the Bristow method is from 1.3 mL·m−2·msec−1/2 to 3.0 mL·m−2·msec−1/2 inclusive, and the viscosity is from 20 mPa·s to 150 mPa·s inclusive.Type: ApplicationFiled: September 16, 2003Publication date: June 24, 2004Applicant: CANON KABUSHIKI KAISHAInventors: Yoichi Takada, Shinya Mishina, Shinichi Hakamada, Noriyasu Asaki, Yasuhiro Nito, Masashi Tsujimura, Takashi Imai