Patents by Inventor Teppei YAWADA
Teppei YAWADA 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: 12189335Abstract: A white toner includes a toner particle that contains a binder resin, a release agent, and titanium oxide, at least a part of the titanium oxide being present in a release agent domain, in which in observation of a cross section of the toner particle, an average major axis length Dt of the toner particle, an average major axis length Dw of the release agent domain, and an average major axis length Dp of the titanium oxide in the release agent domain satisfy Expressions (1) and (2). 2×Dp?Dw?10×Dp??Expression (1): 0.1×Dt?Dw?0.5×Dt??Expression (2).Type: GrantFiled: February 6, 2022Date of Patent: January 7, 2025Assignee: FUJIFILM Business Innovation Corp.Inventors: Teppei Yawada, Asafumi Fujita, Kotaro Yoshihara, Tsuyoshi Murakami
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Patent number: 12169389Abstract: A photoluminescent toner includes a photoluminescent toner particle that contains a binder resin, a release agent, and a photoluminescent pigment and has a release agent domain, and a silicone oil-treated silica particle that is externally added to the photoluminescent toner particle, in which in observation of a cross section of the photoluminescent toner particle, an average major axis length Dw of the release agent domain and an average major axis length Dp of the photoluminescent pigment satisfy Expression (1). 0.3?Dw/Dp?1.Type: GrantFiled: January 28, 2022Date of Patent: December 17, 2024Assignee: FUJIFILM Business Innovation Corp.Inventors: Kotaro Yoshihara, Tsuyoshi Murakami, Asafumi Fujita, Teppei Yawada
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Publication number: 20240094652Abstract: A toner set has a white toner and a color toner, in which in a case where Cw [mg/L] represents an amount of a cation on a surface of the white toner, measured by ion chromatography, and Cc [mg/L] represents an amount of a cation on a surface of the color toner, measured by ion chromatography, the toner set satisfies Conditions (1) and (2). 0.3 mg/L?Cc?1.2 mg/L??(1) (Cw/Cc)?0.Type: ApplicationFiled: January 19, 2023Publication date: March 21, 2024Applicant: FUJIFILM Business Innovation Corp.Inventors: Kotaro YOSHIHARA, Asafumi FUJITA, Teppei YAWADA, Tomoaki TANAKA, Tsuyoshi MURAKAMI
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Publication number: 20240085816Abstract: An electrostatic image developing white toner includes white toner particles including a binder resin and a white coloring agent; and an external additive including poly(meth)acrylate particles, wherein the white toner particles have a volume-average particle size D50W of 6.0 ?m or more and 10 ?m or less, a ratio of the white toner particles having a particle size of 3.2 ?m or less relative to all the white toner particles is 0.5 vol % or more and 3 vol % or less, the white toner particles have a specific surface area Sw of 0.7 cm2/g or more and 1.2 cm2/g or less, and an external addition amount of the poly(meth)acrylate particles relative to the white toner particles is 0.1 mass % or more and 2.0 mass % or less.Type: ApplicationFiled: September 7, 2023Publication date: March 14, 2024Applicant: FUJIFILM Business Innovation Corp.Inventors: Teppei YAWADA, Kotaro YOSHIHARA, Asafumi FUJITA, Tomoaki TANAKA, Tsuyoshi MURAKAMI
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Publication number: 20240085814Abstract: An electrostatic charge image developing toner set contains a white toner that contains white toner particles including a binder resin, a white colorant, and a release agent, and a non-white color toner that contains color toner particles including a binder resin, a color colorant, and a release agent, in which, in observation of cross sections of the white toner particles and the color toner particles, in a case where a proportion of an area of a domain of a release agent present in a surface layer region from a surface of the white toner particles to a depth of 1 ?m or less with respect to an area of all domains of the release agent present in a cross section of the white toner particles is represented by WW, and a case where a proportion of an area of a domain of a release agent present in a surface layer region from a surface of the color toner particles to a depth of 1 ?m or less with respect to an area of all domains of the release agent present in a cross section of the color toner particles is represeType: ApplicationFiled: March 25, 2023Publication date: March 14, 2024Applicant: FUJIFILM Business Innovation Corp.Inventors: Tomoaki TANAKA, Kotaro Yoshihara, Asafumi Fujita, Teppei Yawada, Tsuyoshi Murakami
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Publication number: 20230092262Abstract: A white toner includes a toner particle that contains a binder resin, a release agent, and titanium oxide, at least a part of the titanium oxide being present in a release agent domain, in which in observation of a cross section of the toner particle, an average major axis length Dt of the toner particle, an average major axis length Dw of the release agent domain, and an average major axis length Dp of the titanium oxide in the release agent domain satisfy Expressions (1) and (2). 2×Dp?Dw?10×Dp??Expression (1): 0.1×Dt?Dw?0.Type: ApplicationFiled: February 6, 2022Publication date: March 23, 2023Applicant: FUJIFILM Business Innovation Corp.Inventors: Teppei YAWADA, Asafumi FUJITA, Kotaro YOSHIHARA, Tsuyoshi MURAKAMI
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Publication number: 20230090120Abstract: A photoluminescent toner includes a photoluminescent toner particle that contains a binder resin, a release agent, and a photoluminescent pigment and has a release agent domain, and a silicone oil-treated silica particle that is externally added to the photoluminescent toner particle, in which in observation of a cross section of the photoluminescent toner particle, an average major axis length Dw of the release agent domain and an average major axis length Dp of the photoluminescent pigment satisfy Expression (1). 0.3?Dw/Dp?1.Type: ApplicationFiled: January 28, 2022Publication date: March 23, 2023Applicant: FUJIFILM Business Innovation Corp.Inventors: Kotaro YOSHIHARA, Tsuyoshi MURAKAMI, Asafumi FUJITA, Teppei YAWADA
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Publication number: 20230091296Abstract: A white toner includes a toner particle that contains a binder resin containing a hybrid resin in which an amorphous resin unit and a crystalline polyester resin unit are chemically bonded to each other, surface-treated titanium oxide, and a release agent, in which a proportion of Al atoms in a surface of the surface-treated titanium oxide is 3 atomic % or greater and 20 atomic % or less, and a proportion of Ti atoms in the surface is 5 atomic % or greater and 15 atomic % or less.Type: ApplicationFiled: January 28, 2022Publication date: March 23, 2023Applicant: FUJIFILM Business Innovation Corp.Inventors: Asafumi FUJITA, Teppei YAWADA, Kotaro YOSHIHARA, Tsuyoshi MURAKAMI
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Patent number: 11506989Abstract: An electrostatic charge image developing toner includes toner particles having an average circularity of 0.96 to 1.00 and organic particles having an aspect ratio of 0.4 to 0.9 as an external additive.Type: GrantFiled: May 13, 2020Date of Patent: November 22, 2022Assignee: FUJIFILM Business Innovation Corp.Inventors: Kotaro Yoshihara, Asafumi Fujita, Narumasa Sato, Teppei Yawada, Motoko Sakai
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Patent number: 11156934Abstract: A carrier for developing an electrostatic charge image has magnetic particles and a resin coating that covers the magnetic particles and contains at least one lubricant. The resin coating has a dispersed phase of the lubricant and meets requirement (1). Requirement (1): the lubricant content in a top layer>the lubricant content in a middle layer>the lubricant content in a bottom layer The top, middle, and bottom layers are of the resin coating divided into three in the direction of thickness, and the lubricant content is the percentage area of the dispersed phase of the lubricant in a cross-section of the layer taken along the thickness thereof.Type: GrantFiled: July 31, 2020Date of Patent: October 26, 2021Assignee: FUJIFILM Business Innovation Corp.Inventors: Kotaro Yoshihara, Asafumi Fujita, Teppei Yawada, Motoko Sakai
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Publication number: 20210286284Abstract: A carrier for developing an electrostatic charge image has magnetic particles and a resin coating that covers the magnetic particles and contains at least one lubricant. The resin coating has a dispersed phase of the lubricant and meets requirement (1). Requirement (1): the lubricant content in a top layer>the lubricant content in a middle layer>the lubricant content in a bottom layer The top, middle, and bottom layers are of the resin coating divided into three in the direction of thickness, and the lubricant content is the percentage area of the dispersed phase of the lubricant in a cross-section of the layer taken along the thickness thereof.Type: ApplicationFiled: July 31, 2020Publication date: September 16, 2021Applicant: FUJI XEROX Co., Ltd.Inventors: Kotaro YOSHIHARA, Asafumi FUJITA, Teppei YAWADA, Motoko SAKAI
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Publication number: 20210157249Abstract: An electrostatic charge image developing toner includes toner particles having an average circularity of 0.96 to 1.00 and organic particles having an aspect ratio of 0.4 to 0.9 as an external additive.Type: ApplicationFiled: May 13, 2020Publication date: May 27, 2021Applicant: FUJI XEROX CO., LTD.Inventors: Kotaro YOSHIHARA, Asafumi FUJITA, Narumasa SATO, Teppei YAWADA, Motoko SAKAI
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Patent number: 10921724Abstract: An image forming apparatus includes an image holding member, a charging unit that charges a surface of the image holding member, an electrostatic charge image forming unit that forms an electrostatic charge image on the charged surface of the image holding member, a developing unit that includes an electrostatic charge image developing toner and that develops the electrostatic charge image on the surface of the image holding member with the electrostatic chare image developing toner to form a toner image, an intermediate transfer body having a circumferential surface of which micro rubber hardness is in a range of 45 to 65, a first transfer unit that first transfers the toner image formed on the surface of the image holding member to a surface of the intermediate transfer body, and a second transfer unit that second transfers the toner image transferred to the surface of the intermediate transfer body to a recording medium, wherein the electrostatic charge image developing toner satisfies the following formulType: GrantFiled: August 30, 2019Date of Patent: February 16, 2021Assignee: FUJI XEROX CO.. LTD.Inventors: Teppei Yawada, Naoki Ota, Tatsuhiro Igarashi
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Publication number: 20200310307Abstract: An image forming apparatus includes an image holding member, a charging unit that charges a surface of the image holding member, an electrostatic charge image forming unit that forms an electrostatic charge image on the charged surface of the image holding member, a developing unit that includes an electrostatic charge image developing toner and that develops the electrostatic charge image on the surface of the image holding member with the electrostatic chare image developing toner to form a toner image, an intermediate transfer body having a circumferential surface of which micro rubber hardness is in a range of 45 to 65, a first transfer unit that first transfers the toner image formed on the surface of the image holding member to a surface of the intermediate transfer body, and a second transfer unit that second transfers the toner image transferred to the surface of the intermediate transfer body to a recording medium, wherein the electrostatic charge image developing toner satisfies the following formulType: ApplicationFiled: August 30, 2019Publication date: October 1, 2020Applicant: FUJI XEROX CO., LTD.Inventors: Teppei Yawada, Naoki Ota, Tatsuhiro Igarashi
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Patent number: 10719041Abstract: An image forming apparatus includes an image holding member, a charging unit that charges the surface of the image holding member, an electrostatic charge image forming unit that forms an electrostatic charge image on the charged surface of the image holding member, a developing unit that includes a developer containing toner particles containing a release agent having a melting temperature ranging from 60° C. to 100° C.Type: GrantFiled: March 25, 2019Date of Patent: July 21, 2020Assignee: FUJI XEROX CO., LTD.Inventors: Tatsuhiro Igarashi, Naoki Ota, Yusuke Fukuda, Makoto Kamisaki, Yasuhisa Morooka, Jun Sekiya, Teppei Yawada, Masataka Kuribayashi, Takafumi Koide, Katsuyuki Kitajima, Shota Oshima
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Patent number: 10670998Abstract: An image forming apparatus includes: an image holding member; a charging unit that charges a surface of the image holding member; an electrostatic image forming unit that forms an electrostatic image on the charged surface of the image holding member; a developing unit that houses an electrostatic image developer including a toner containing an external additive and develops the electrostatic image formed on the surface of the image holding member with the electrostatic image developer to thereby form a toner image; a transfer unit that transfers the toner image formed on the surface of the image holding member onto a surface of a recording medium directly or through an intermediate transfer body; and a fixing unit that fixes the toner image transferred onto the surface of the recording medium.Type: GrantFiled: August 15, 2019Date of Patent: June 2, 2020Assignee: FUJI XEROX CO., LTD.Inventors: Naoki Ota, Teppei Yawada
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Patent number: 10656567Abstract: An image forming apparatus includes an image holding member, a charging unit that charges a surface of the image holding member, an electrostatic charge image forming unit that forms an electrostatic charge image on the charged surface of the image holding member, a developing unit that includes an electrostatic charge image developing toner and that develops the electrostatic charge image on the surface of the image holding member with the electrostatic chare image developing toner to form a toner image, an intermediate transfer body that has a circumferential surface having a plurality of grooves and an average in-plane roughness ranging from 10 nm to 30 nm, a first transfer unit that first transfers the toner image formed on the surface of the image holding member to a surface of the intermediate transfer body, and a second transfer unit that second transfers the toner image transferred to the surface of the intermediate transfer body to a recording medium, wherein the electrostatic charge image developingType: GrantFiled: September 3, 2019Date of Patent: May 19, 2020Assignee: FUJI XEROX CO., LTD.Inventors: Tatsuhiro Igarashi, Naoki Ota, Teppei Yawada
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Publication number: 20200073296Abstract: An image forming apparatus includes an image holding member, a charging unit that charges the surface of the image holding member, an electrostatic latent image forming unit that forms an electrostatic latent image on the charged surface of the image holding member, a developing unit that includes a developer containing toner particles containing a release agent having a melting temperature ranging from 60° C. to 100° C.Type: ApplicationFiled: April 2, 2019Publication date: March 5, 2020Applicant: FUJI XEROX CO., LTD.Inventors: Katsuyuki KITAJIMA, Masataka KURIBAYASHI, Takafumi KOIDE, Teppei YAWADA, Shota OSHIMA
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Publication number: 20200064753Abstract: An image forming apparatus includes an image holding member, a charging unit that charges the surface of the image holding member, an electrostatic latent image forming unit that forms an electrostatic latent image on the charged surface of the image holding member, a developing unit that develops the electrostatic latent image to form a toner image, a transferring unit that transfers the toner image to a first side of a recording medium, a fixing unit that allows the recording medium having the transferred toner image to pass through a nipping region to fix the toner image, a first charging unit that faces the first side of the recording medium and that charges particles, and a second charging unit that charges a second side of the recording medium to the opposite polarity to the charged particles after the recording medium passes through the nipping region.Type: ApplicationFiled: April 1, 2019Publication date: February 27, 2020Applicant: FUJI XEROX CO., LTD.Inventors: Masataka KURIBAYASHI, Takafumi KOIDE, Katsuyuki KITAJIMA, Teppei YAWADA, Shota OSHIMA
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Publication number: 20200064760Abstract: An image forming apparatus includes an image holding member, a charging unit that charges the surface of the image holding member, an electrostatic charge image forming unit that forms an electrostatic charge image on the charged surface of the image holding member, a developing unit that includes a developer containing toner particles containing a release agent having a melting temperature ranging from 60° C. to 100° C.Type: ApplicationFiled: March 25, 2019Publication date: February 27, 2020Applicant: FUJI XEROX CO., LTD.Inventors: Tatsuhiro IGARASHI, Naoki OTA, Yusuke FUKUDA, Makoto KAMISAKI, Yasuhisa MOROOKA, Jun SEKIYA, Teppei YAWADA, Masataka KURIBAYASHI, Takafumi KOIDE, Katsuyuki KITAJIMA, Shota OSHIMA