Patents by Inventor Hiroe Ishikura
Hiroe Ishikura 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: 20200130362Abstract: A porous body according to the present disclosure has a first porous layer, a second porous layer, and a third porous layer in this order, in which the first porous layer has a fiber constituted by a first fluororesin, the second porous layer has a fiber constituted by a second fluororesin and a thermoset resin, the second fluororesin is the same as the first fluororesin, and the third porous layer has a fiber constituted by a resin having surface energy higher than that of the first fluororesin.Type: ApplicationFiled: October 24, 2019Publication date: April 30, 2020Inventor: Hiroe Ishikura
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Patent number: 10500565Abstract: The present invention provides a porous body for the absorption of a liquid component contained in an ink image on an ink receiving medium, the porous body including a fiber having a pore structure in the inside, wherein the pore structure satisfies the following requirements (a) and (b), and an inter-fiber void ratio which indicates the volume ratio of a void formed between the each fibers is 40% or more to 80% or less: (a) average pore size/average fiber diameter is 0.2 or less; and (b) an intra-fiber void ratio is 5% or more to 40% or less.Type: GrantFiled: June 25, 2018Date of Patent: December 10, 2019Assignee: CANON KABUSHIKI KAISHAInventor: Hiroe Ishikura
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Patent number: 10377150Abstract: A porous body that includes a first porous layer including a first resin, a second porous layer including a second resin, and a third porous layer including a third resin in this order. The second porous layer has a portion where no material is present when viewed in a thickness direction.Type: GrantFiled: June 20, 2018Date of Patent: August 13, 2019Assignee: CANON KABUSHIKI KAISHAInventors: Toru Ohnishi, Noboru Toyama, Hiroe Ishikura, Osamu Yoshitake
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Publication number: 20190001301Abstract: The present invention provides a porous body for the absorption of a liquid component contained in an ink image on an ink receiving medium, the porous body including a fiber having a pore structure in the inside, wherein the pore structure satisfies the following requirements (a) and (b), and an inter-fiber void ratio which indicates the volume ratio of a void formed between the each fibers is 40% or more to 80% or less: (a) average pore size/average fiber diameter is 0.2 or less; and (b) an intra-fiber void ratio is 5% or more to 40% or less.Type: ApplicationFiled: June 25, 2018Publication date: January 3, 2019Inventor: Hiroe Ishikura
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Publication number: 20180297377Abstract: A porous body that includes a first porous layer including a first resin, a second porous layer including a second resin, and a third porous layer including a third resin in this order. The second porous layer has a portion where no material is present when viewed in a thickness direction.Type: ApplicationFiled: June 20, 2018Publication date: October 18, 2018Inventors: Toru Ohnishi, Noboru Toyama, Hiroe Ishikura, Osamu Yoshitake
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Patent number: 10029481Abstract: A method for producing a porous body for use in an ink jet recording apparatus including an image forming unit configured to form a first image including a first liquid and a coloring material on an ink receiving medium, and a liquid absorbing member including the porous body that contacts with the first image to absorb part of the first liquid from the first image. The method includes laminating a first porous layer that contacts with the first image and includes a first resin, and a second and a third porous layer including a second and a third resin; and heating the laminated first to third porous layers, wherein the second porous layer has a void when viewed in a thickness direction, and softening temperatures T1 through T3 of the first to third resins and heating temperature T in heating the first to third porous layers satisfy T2<T, T<T1, T<T3.Type: GrantFiled: January 20, 2017Date of Patent: July 24, 2018Assignee: CANON KABUSHIKI KAISHAInventors: Toru Ohnishi, Noboru Toyama, Hiroe Ishikura, Osamu Yoshitake
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Publication number: 20170217215Abstract: A method for producing a porous body for use in an ink jet recording apparatus including an image forming unit configured to form a first image including a first liquid and a coloring material on an ink receiving medium, and a liquid absorbing member including the porous body that contacts with the first image to absorb part of the first liquid from the first image. The method includes laminating a first porous layer that contacts with the first image and includes a first resin, and a second and a third porous layer including a second and a third resin; and heating the laminated first to third porous layers, wherein the second porous layer has a void when viewed in a thickness direction, and softening temperatures T1 through T3 of the first to third resins and heating temperature T in heating the first to third porous layers satisfy T2<T, T<T1, T<T3.Type: ApplicationFiled: January 20, 2017Publication date: August 3, 2017Inventors: Toru Ohnishi, Noboru Toyama, Hiroe Ishikura, Osamu Yoshitake
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Patent number: 9168749Abstract: This invention relates to a manufacturing method of a liquid discharge head comprising: forming an active energy ray-curable resin layer on a surface of a substrate on which discharge energy generating elements are formed, attaching a material permeable to active energy rays onto a surface of the active energy ray-curable resin layer, pressing against the material permeable to active energy rays, a master mold being transparent to the active energy rays and having protrusions corresponding to a pattern of discharge ports so as to transfer the protrusions to the material permeable to active energy rays, selectively irradiating the active energy ray-curable resin layer with active energy rays according to a pattern of liquid flow paths so as to cure the active energy ray-curable resin layer, removing the master mold, and removing uncured portions of the active energy ray-curable resin layer.Type: GrantFiled: December 2, 2009Date of Patent: October 27, 2015Assignee: Canon Kabushiki KaishaInventors: Yoshikazu Saito, Hiroe Ishikura, Takumi Suzuki, Tamaki Sato, Hirono Yoneyama, Masafumi Morisue, Ryoji Kanri
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Patent number: 8974718Abstract: A method for producing a structure includes, in this order, providing a substrate composed of a first resin layer and a second resin layer laminated in this order, the first resin layer being made of a positive photosensitive resin having positive photosensitivity to light having a wavelength of 280 nm or more, and the second resin layer containing an anthracene compound, partially exposing the second resin layer to light having a wavelength of 300 nm or more, radiating light having a wavelength of 280 nm or more to the first resin layer through the exposed portions of the second resin layer using the unexposed portions of the second resin layer as a mask, thereby exposing the first resin layer to light, and removing the exposed portions of the first resin layer to form a structure.Type: GrantFiled: June 24, 2011Date of Patent: March 10, 2015Assignee: Canon Kabushiki KaishaInventor: Hiroe Ishikura
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Publication number: 20130029272Abstract: The present invention provides a process for producing a fine pattern including, (1) forming a first resin layer containing a photosensitive resin on a substrate; (2) forming a second resin layer containing a secondary or tertiary alkynyl alcohol, a photoacid generator, and a resin on the first resin layer; (3) subjecting the second resin layer to pattern exposure; (4)subjecting the first resin layer to exposure using the pattern-exposed portion of the second resin layer as a mask; and (5) removing the second resin layer and the first resin layer.Type: ApplicationFiled: May 20, 2011Publication date: January 31, 2013Applicant: CANON KABUSHIKI KAISHAInventor: Hiroe Ishikura
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Patent number: 8227043Abstract: A method for manufacturing a liquid discharge head includes the steps of: forming a solid layer for forming a flow path on a substrate on which an energy generating element is arranged to generate energy that is used to discharge liquid; forming, on the substrate where the solid layer is mounted, a coating layer for coating the solid layer; forming a discharge port used to discharge a liquid, through a photolithographic process, in the coating layer deposited on the solid layer; and removing the solid layer to form a flow path that communicates with the energy element and the discharge port. A material used for the coating layer contains a cationically polymerizable chemical compound, a cationic photopolymerization initiator and an inhibitor of cationic photopolymerization, and a material of the solid layer that forms a boundary with a portion where the discharge port of the coating layer is formed contains a copolymer of methacrylic acid and methacrylate ester.Type: GrantFiled: June 27, 2005Date of Patent: July 24, 2012Assignee: Canon Kabushiki KaishaInventors: Masahiko Kubota, Takumi Suzuki, Tamaki Sato, Ryoji Kanri, Maki Hatta, Kazuhiro Asai, Shoji Shiba, Etsuko Hino, Hiroe Ishikura, Akihiko Okano
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Patent number: 8124791Abstract: The invention provides an active energy ray curable liquid composition containing a compound represented by a general formula (I): wherein A is a hydrogen atom or a monovalent organic residue which may be substituted, R1 and R2 are, independently of each other, a divalent organic group which may be substituted, E is an amide bond, Rn is a cyclic linking group having a carbonyl group and an unsaturated carbon-carbon bond adjacent to the carbon atom of the carbonyl group, m is a number of 0 or greater, n is a number of 2 or greater, m+n is 3, and Z is a secondary or tertiary amino bond structure, with the proviso that the amino bond may be a salt of a secondary or tertiary amine, and a liquid cartridge.Type: GrantFiled: March 25, 2008Date of Patent: February 28, 2012Assignee: Canon Kabushiki KaishaInventors: Kenji Shinjo, Norio Ohkuma, Shoji Shiba, Hikaru Ueda, Hiroe Ishikura, Shinsuke Tsuji, Yoshikazu Saito, Kouji Harada, Yuichiro Kanasugi
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Publication number: 20110316188Abstract: A method for producing a structure includes, in this order, providing a substrate composed of a first resin layer and a second resin layer laminated in this order, the first resin layer being made of a positive photosensitive resin having positive photosensitivity to light having a wavelength of 280 nm or more, and the second resin layer containing an anthracene compound, partially exposing the second resin layer to light having a wavelength of 300 nm or more, radiating light having a wavelength of 280 nm or more to the first resin layer through the exposed portions of the second resin layer using the unexposed portions of the second resin layer as a mask, thereby exposing the first resin layer to light, and removing the exposed portions of the first resin layer to form a structure.Type: ApplicationFiled: June 24, 2011Publication date: December 29, 2011Applicant: CANON KABUSHIKI KAISHAInventor: Hiroe Ishikura
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Patent number: 8017307Abstract: A method for manufacturing a minute structure comprises a step of forming an ionizing radiation decomposing type positive type resist layer including a methyl isopropenyl ketone as a first positive type photosensitive material layer, a step of forming an ionizing radiation decomposing type positive type resist layer including a photosensitive material of a copolymer as a second positive type photosensitive material layer to be sensitized by an ionizing radiation of a second wavelength range on the first positive type photosensitive material layer, a step of forming a desired pattern in the above-mentioned second positive type photosensitive material layer, and development using a developing solution, and then, a step of forming a desired pattern in the above-mentioned first positive type photosensitive material layer to form a convex shape pattern.Type: GrantFiled: June 27, 2005Date of Patent: September 13, 2011Assignee: Canon Kabushiki KaishaInventors: Masahiko Kubota, Takumi Suzuki, Tamaki Sato, Ryoji Kanri, Maki Hatta, Kazuhiro Asai, Shoji Shiba, Hiroe Ishikura, Akihiko Okano
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Publication number: 20110206861Abstract: This invention relates to a manufacturing method of a liquid discharge head comprising: forming an active energy ray-curable resin layer on a surface of a substrate on which discharge energy generating elements are formed, attaching a material permeable to active energy rays onto a surface of the active energy ray-curable resin layer, pressing against the material permeable to active energy rays, a master mold being transparent to the active energy rays and having protrusions corresponding to a pattern of discharge ports so as to transfer the protrusions to the material permeable to active energy rays, selectively irradiating the active energy ray-curable resin layer with active energy rays according to a pattern of liquid flow paths so as to cure the active energy ray-curable resin layer, removing the master mold, and removing uncured portions of the active energy ray-curable resin layer.Type: ApplicationFiled: December 2, 2009Publication date: August 25, 2011Applicant: CANON KABUSHIKI KAISHAInventors: Yoshikazu Saito, Hiroe Ishikura, Takumi Suzuki, Tamaki Sato, Hirono Yoneyama, Masafumi Morisue, Ryoji Kanri
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Patent number: 7971964Abstract: A method for manufacturing a liquid discharge head including an energy generating element, which generates energy utilized for discharging a liquid, and a discharge portion provided at a position facing the energy generating element and having a discharge port for discharging the liquid is provided. This method includes the steps of forming a negative photosensitive resin layer used for a member that forms the discharge port on the substrate, and exposing the layer to an i-line to form the discharge portion that is tapered in a direction from the substrate to the discharge port, wherein the layer has an absorbance per 1 ?m thickness of about 0.02 to about 0.07 for light used for the exposure.Type: GrantFiled: November 16, 2007Date of Patent: July 5, 2011Assignee: Canon Kabushiki KaishaInventors: Shoji Shiba, Akihiko Okano, Yoshikazu Saito, Kazuhiro Asai, Tamaki Sato, Takumi Suzuki, Masahiko Kubota, Maki Kato, Hiroe Ishikura, Shinsuke Tsuji
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Publication number: 20100159405Abstract: According to the fine pattern manufacturing method of the invention, the residue of a pattern which is obtained by pressing a mold is prevented from occurring, so that the structure can be more easily manufactured.Type: ApplicationFiled: December 9, 2009Publication date: June 24, 2010Applicant: CANON KABUSHIKI KAISHAInventors: Hiroe Ishikura, Takumi Suzuki, Tamaki Sato, Hirono Naito, Masafumi Morisue, Yoshikazu Saito, Ryoji Kanri
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Publication number: 20100094024Abstract: The invention provides an active energy ray curable liquid composition containing a compound represented by a general formula (I): wherein A is a hydrogen atom or a monovalent organic residue which may be substituted, R1 and R2 are, independently of each other, a divalent organic group which may be substituted, E is an amide bond, Rn is a cyclic linking group having a carbonyl group and an unsaturated carbon-carbon bond adjacent to the carbon atom of the carbonyl group, m is a number of 0 or greater, n is a number of 2 or greater, m+n is 3, and Z is a secondary or tertiary amino bond structure, with the proviso that the amino bond may be a salt of a secondary or tertiary amine, and a liquid cartridge.Type: ApplicationFiled: March 25, 2008Publication date: April 15, 2010Applicant: CANON KABUSHIKI KAISHAInventors: Kenji Shinjo, Norio Ohkuma, Shoji Shiba, Hikaru Ueda, Hiroe Ishikura, Shinsuke Tsuji, Yoshikazu Saito, Kouji Harada, Yuichiro Kanasugi
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Patent number: 7670757Abstract: To provide a positive type photosensitive resin composition, containing at least an acrylic resin having a carboxylic anhydride structure in a molecule, and a compound that generates an acid when irradiated with light.Type: GrantFiled: June 24, 2005Date of Patent: March 2, 2010Assignee: Canon Kabushiki KaishaInventors: Shoji Shiba, Hiroe Ishikura, Akihiko Okano
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Patent number: 7629111Abstract: A method for manufacturing a liquid discharge head includes the steps of depositing a solid layer for forming a flow path on a substrate on which an energy generating element is arranged to generate energy that is used to discharge liquid, forming, on the substrate where the solid layer is mounted, a coating layer for coating the solid layer, forming a discharge port used to discharge a liquid, through a photolithographic process, in the coating layer formed on the solid layer, and removing the solid layer to form a flow path that communicates with the energy element and the discharge port, whereby a material used for the coating layer contains a cationically polymerizable chemical compound, a cationic photopolymerization initiator and an inhibitor of cationic photopolymerization, and whereby a material of the solid layer that forms a boundary with a portion where the discharge port of the coating layer is formed contains a copolymer of methacrylic anhydride and methacrylate ester.Type: GrantFiled: June 27, 2005Date of Patent: December 8, 2009Assignee: Canon Kabushiki KaishaInventors: Masahiko Kubota, Takumi Suzuki, Tamaki Sato, Ryoji Kanri, Maki Hatta, Kazuhiro Asai, Shoji Shiba, Etsuko Hino, Hiroe Ishikura, Akihiko Okano