Patents by Inventor Takuya Mizuguchi
Takuya Mizuguchi 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: 11829104Abstract: A toner comprising a toner particle comprising a binder resin and a crystalline resin, wherein the binder resin comprises an amorphous resin, when the toner is measured with a temperature-modulated differential scanning calorimeter, at least one endothermic peak derived from the crystalline resin is present in a temperature range from 55.0° C. to 95.0° C. in a total heat flow; and a ratio of an endothermic quantity of the endothermic peak in a reversing heat flow to an endothermic quantity of the endothermic peak in the total heat flow is 50.0% or more, a glass transition temperature Tg1st obtained in the reversing heat flow in a first temperature rise and a glass transition temperature Tg2nd obtained in a reversing heat flow in a second temperature rise satisfy Tg1st?Tg2nd?7.0° C.Type: GrantFiled: April 27, 2021Date of Patent: November 28, 2023Assignee: CANON KABUSHIKI KAISHAInventors: Takuya Mizuguchi, Yoshitaka Suzumura, Hiroyuki Tomono, Osamu Matsushita, Shotaro Nomura
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Publication number: 20220214630Abstract: The present disclosure provides a toner that achieves both high image gloss and high image loadability. The toner includes a toner particle that includes: a styrene-acrylic resin having a unit represented by the formula (1); and an ester compound A, wherein the ester compound A is an ester compound represented by the formula (2) or the formula (3): and an absolute value of a difference between SPb (J/cm3)1/2 that is an SP value of the styrene-acrylic resin and SPw1 (J/cm3)1/2 that is an SP value of the ester compound A is 1.00 or larger and 2.00 or smaller.Type: ApplicationFiled: December 9, 2021Publication date: July 7, 2022Inventors: Kenta Kamikura, Kozue Uratani, Kosuke Fukudome, Tetsuya Kinumatsu, Takuya Mizuguchi, Yuta Komiya
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Publication number: 20220206402Abstract: A toner including a toner particle containing a binder resin and an ester compound, wherein the binder resin contains a styrene-acrylic-based resin, the styrene-acrylic-based resin contains a specific unit, the ester compound has a specific structure, and a molar ratio of the specific unit to the ester compound is 0.5 to 1.5.Type: ApplicationFiled: December 13, 2021Publication date: June 30, 2022Inventors: Kozue Uratani, Kenta Kamikura, Kosuke Fukudome, Tetsuya Kinumatsu, Takuya Mizuguchi, Yuta Komiya
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Patent number: 11360426Abstract: An electrophotographic apparatus comprising an electrophotographic photosensitive member, a charging device and a developing device, wherein the charging device comprises a conductive member arranged to be capable of contacting the electrophotographic photosensitive member, a conductive layer of the conductive member comprises a matrix domain structure, at least a part of the domains Dt is exposed at the conductive member outer surface, the matrix has a volume resistivity R1 of larger than 1.00×1012 ?·cm, the domains Dt has a volume resistivity of smaller than R1, the developing device comprises the toner, domains Dc formed of the crystalline material exist in a cross section of the toner, distances between adjacent wall surfaces of the domains Dc is from 30 to 1,100 nm, and a weight-average particle diameter D4 of the toner and distances Dms between adjacent wall surfaces between the domains Dt satisfies D4?Dms.Type: GrantFiled: October 15, 2020Date of Patent: June 14, 2022Assignee: CANON KABUSHIKI KAISHAInventors: Yoshitaka Suzumura, Hiroyuki Tomono, Takuya Mizuguchi, Osamu Matsushita, Shunsuke Matsushita, Masahiro Kurachi, Kazuhiro Yamauchi
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Patent number: 11360405Abstract: An electrophotographic apparatus comprising an electrophotographic photosensitive member, a charging device and a developing device, wherein the charging device comprises a conductive member arranged to be capable of contacting the electrophotographic photosensitive member, the conductive layer at the outer surface of the conductive member comprises a matrix and a plurality of domains dispersed in the matrix, at least some of the domains are exposed at the outer surface of the conductive member, the matrix has a volume resistivity R1 of larger than 1.00×1012 ?·cm, the volume resistivity R1 of the matrix is 1.0×105 times or more a volume resistivity R2 of the domains, the developing device comprises the toner comprising a toner particle and a silica fine particle, and a coverage ratio of the toner surface with the silica fine particles is from 62.0% by area to 100.0% by area as determined by X-ray photoelectron spectroscopy.Type: GrantFiled: October 15, 2020Date of Patent: June 14, 2022Assignee: CANON KABUSHIKI KAISHAInventors: Hiroyuki Tomono, Yoshitaka Suzumura, Takuya Mizuguchi, Osamu Matsushita, Masahiro Kurachi, Kazuhiro Yamauchi, Issei Imamura
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Publication number: 20220146952Abstract: A toner comprising a toner particle comprising a binder resin, and an ester wax A having a specific structure, wherein in a diffraction spectrum obtained by an X-ray diffractometer after the toner has been allowed to stand at 120° C. for 5 minutes and then at 60° C. for 5 minutes, assuming that a spectrum having a maximum peak in a range where 2? is from 5.45° to 5.95° is P1 and an integrated intensity of the P1 is S1, and a spectrum having a maximum peak in a range where 2? is from 21.45° to 21.95° is P2 and an integrated intensity of the P2 is S2, relationships of formulas (2) and (3) below are satisfied. S1/S2?0.Type: ApplicationFiled: November 5, 2021Publication date: May 12, 2022Inventors: Yuta Komiya, Kosuke Fukudome, Dai Nozaki, Kozue Uratani, Takuya Mizuguchi, Tomoko Sugita
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Publication number: 20220146955Abstract: A toner comprising a toner particle comprising a binder resin, a hydrocarbon wax A, and an ester wax B, wherein assuming that a ratio of a peak intensity attributed to the hydrocarbon wax A to a peak intensity attributed to the binder resin in heating IR measurement in which the toner is held at 100° C. for 10 min is I, where an initial peak intensity ratio upon heating to 100° C. is denoted by I(ini) and a peak intensity ratio upon heating to 100° C. and holding for 10 min is denoted by I(10 min), the I(ini) and the I(10 min) satisfy a following formula (1): I(ini)/I(10 min)?0.95??(1).Type: ApplicationFiled: November 5, 2021Publication date: May 12, 2022Inventors: Dai Nozaki, Kosuke Fukudome, Kozue Uratani, Takuya Mizuguchi, Yuta Komiya, Tomoko Sugita
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Publication number: 20210356878Abstract: A toner comprising a toner particle comprising a binder resin and a crystalline resin, wherein the binder resin comprises an amorphous resin, when the toner is measured with a temperature-modulated differential scanning calorimeter, at least one endothermic peak derived from the crystalline resin is present in a temperature range from 55.0° C. to 95.0° C. in a total heat flow; and a ratio of an endothermic quantity of the endothermic peak in a reversing heat flow to an endothermic quantity of the endothermic peak in the total heat flow is 50.0% or more, a glass transition temperature Tg1st obtained in the reversing heat flow in a first temperature rise and a glass transition temperature Tg2nd obtained in a reversing heat flow in a second temperature rise satisfy Tg1st?Tg2nd?7.0° C.Type: ApplicationFiled: April 27, 2021Publication date: November 18, 2021Inventors: Takuya Mizuguchi, Yoshitaka Suzumura, Hiroyuki Tomono, Osamu Matsushita, Shotaro Nomura
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Publication number: 20210116860Abstract: An electrophotographic apparatus comprising an electrophotographic photosensitive member, a charging device and a developing device, wherein the charging device comprises a conductive member arranged to be capable of contacting the electrophotographic photosensitive member, a conductive layer of the conductive member comprises a matrix domain structure, at least a part of the domains Dt is exposed at the conductive member outer surface, the matrix has a volume resistivity R1 of larger than 1.00×1012 ?·cm, the domains Dt has a volume resistivity of smaller than R1, the developing device comprises the toner, domains Dc formed of the crystalline material exist in a cross section of the toner, distances between adjacent wall surfaces of the domains Dc is from 30 to 1,100 nm, and a weight-average particle diameter D4 of the toner and distances Dms between adjacent wall surfaces between the domains Dt satisfies D4?Dms.Type: ApplicationFiled: October 15, 2020Publication date: April 22, 2021Inventors: Yoshitaka Suzumura, Hiroyuki Tomono, Takuya Mizuguchi, Osamu Matsushita, Shunsuke Matsushita, Masahiro Kurachi, Kazuhiro Yamauchi
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Publication number: 20210116829Abstract: An electrophotographic apparatus comprising an electrophotographic photosensitive member, a charging device and a developing device, wherein the charging device comprises a conductive member arranged to be capable of contacting the electrophotographic photosensitive member, the conductive layer at the outer surface of the conductive member comprises a matrix and a plurality of domains dispersed in the matrix, at least some of the domains are exposed at the outer surface of the conductive member, the matrix has a volume resistivity R1 of larger than 1.00×1012 ?·cm, the volume resistivity R1 of the matrix is 1.0×105 times or more a volume resistivity R2 of the domains, the developing device comprises the toner comprising a toner particle and a silica fine particle, and a coverage ratio of the toner surface with the silica fine particles is from 62.0% by area to 100.0% by area as determined by X-ray photoelectron spectroscopy.Type: ApplicationFiled: October 15, 2020Publication date: April 22, 2021Inventors: Hiroyuki Tomono, Yoshitaka Suzumura, Takuya Mizuguchi, Osamu Matsushita, Masahiro Kurachi, Kazuhiro Yamauchi, Issei Imamura
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Publication number: 20210080846Abstract: A toner comprising a toner particle including a binder resin, wherein in a temperature T (° C.)-storage elastic modulus G? (Pa) curve obtained by measuring the toner with a rheometer, a storage elastic modulus G? (80° C.) at 80° C. is from 2.0×103 Pa to 2.0×105 Pa; and a local minimum value of a change amount (dG?/dT) of a storage elastic modulus G? in a range of 60° C. to 80° C. with respect to a temperature T is ?1.0×106 or less, and when the temperature of the toner is raised, where a projected area of the toner at 80° C. is S1 (?m2), a radius of the projected area of the toner at 80° C. is R1 (?m), and a projected area of the toner at 120° C. is S2 (?m2), the S1, R1 and S2 satisfy a following formula (1): S2/S1×1/R1?0.22.Type: ApplicationFiled: September 4, 2020Publication date: March 18, 2021Inventors: Takuya Mizuguchi, Yoshitaka Suzumura, Hiroyuki Tomono, Osamu Matsushita, Shuntaro Watanabe, Hiroki Akiyama, Hiroki Kagawa
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Patent number: 10901264Abstract: Provided is a light diffusion plate that enables uniformization of luminance easily and reliably. The light diffusion plate is to be placed on a side of a light-emitting face of at least one light source, and comprises: a substrate layer that is light-diffusible and has a light-incident face to be opposed to the light-emitting face, and a light-outputting face on an opposite side of the light-incident face; a reflecting dot pattern that is provided on a side of the light-incident face or the light-outputting face of the substrate layer and includes a plurality of reflecting dots; and the light-shielding dot pattern that is provided on a side of the light-incident face or the light-outputting face of the substrate layer and includes a plurality of light-shielding dots, in which the reflecting dot pattern and the light-shielding dot pattern overlap at least partially in a planar view.Type: GrantFiled: August 2, 2019Date of Patent: January 26, 2021Assignee: KEIWA INC.Inventor: Takuya Mizuguchi
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Publication number: 20200265510Abstract: In the case of financing across countries, a credit application will be circulated across a plurality of countries, a plurality of branches, and a plurality of departments. Therefore, while a credit application is being circulated, the credit data of a financing related party may be updated. Therefore, there is a need for a method and system capable of decision on a credit application and in turn executing a loan on the basis of the latest credit data. There are provided a method and system capable of reflecting the credit data of a financing related party when updated even before decision, on a credit application, and capable of decision on a credit application and in turn executing a loan on the basis of the latest credit data.Type: ApplicationFiled: July 31, 2015Publication date: August 20, 2020Inventors: Kiyonori UGAJIN, Kazuya IKEDA, Fumitaka KATO, Yoshiaki YODA, Masato HAYASHI, Takuya MIZUGUCHI, Sho MATSUO, Masato KANO
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Publication number: 20200041846Abstract: Provided is a light diffusion plate that enables uniformization of luminance easily and reliably. The light diffusion plate is to be placed on a side of a light-emitting face of at least one light source, and comprises: a substrate layer that is light-diffusible and has a light-incident face to be opposed to the light-emitting face, and a light-outputting face on an opposite side of the light-incident face; a reflecting dot pattern that is provided on a side of the light-incident face or the light-outputting face of the substrate layer and includes a plurality of reflecting dots; and the light-shielding dot pattern that is provided on a side of the light-incident face or the light-outputting face of the substrate layer and includes a plurality of light-shielding dots, in which the reflecting dot pattern and the light-shielding dot pattern overlap at least partially in a planar view.Type: ApplicationFiled: August 2, 2019Publication date: February 6, 2020Inventor: Takuya MIZUGUCHI
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Publication number: 20190147531Abstract: A credit management system includes a device configured to store customer information for each customer; a device configured to store deal information for each credit transaction, the deal information being associated with one or more customer information; a device configured to receive an identifier for specifying a customer or a credit transaction; and a device configured to notify deal information associated with a customer having the received identifier, or customer information associated with a credit transaction having the received identifier.Type: ApplicationFiled: July 31, 2015Publication date: May 16, 2019Inventors: Kiyonori UGAJIN, Kazushige ONISHI, Shinichiro NISHINO, Takuya MIZUGUCHI
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Patent number: 10241430Abstract: A toner comprising: a toner particle containing a binder resin and a colorant; and an external additive, wherein the external additive is a composite particle having an organic substance and an organosilicon polymer coating layer on the surface of the organic substance, and when a curve for the variation (dE?/dT) in the storage elastic modulus E? of the toner with respect to temperature T [° C.] is obtained on the basis of a curve of the temperature T—the storage elastic modulus E? [Pa] of the toner, as determined by powder dynamic viscoelasticity measurements of the toner, the relative minimum value on the lowest temperature side between the onset temperature and 90° C. is ?1.35×108 or less.Type: GrantFiled: May 2, 2018Date of Patent: March 26, 2019Assignee: Canon Kabushiki KaishaInventors: Sho Kimura, Shuhei Moribe, Takashi Matsui, Hiroyuki Tomono, Shotaro Nomura, Atsuhiko Ohmori, Takuya Mizuguchi, Tatsuya Saeki, Katsuhisa Yamazaki
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Patent number: 10228630Abstract: A toner comprising an external additive A, and a toner particle containing a binder resin and a colorant, wherein the external additive A: i) is an external additive that has a charge control agent on the surface thereof; ii) has a wall friction angle ? calculated from the following formula (1) of not more than 25.0° ?=?/5.0??formula (1); iii) has a number-average particle diameter (D1) of primary particles of at least 70 nm and not more than 500 nm; and iv) has a solidity as given by the following formula (2) of at least 0.40 and not more than 0.90 solidity=area of external additive A/area of region encompassed by envelope for external additive A?? formula (2).Type: GrantFiled: September 7, 2017Date of Patent: March 12, 2019Assignee: CANON KABUSHIKI KAISHAInventors: Takuya Mizuguchi, Kazuo Terauchi, Yojiro Hotta, Takeshi Naka, Motohide Shiozawa, Masami Fujimoto
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Patent number: 10197934Abstract: A toner having a toner particle containing a binder resin, an amorphous polyester, and a colorant, wherein a softening point of the toner is at least 110° C. and not more than 140° C.; an integrated value f1 for stress of the toner is not more than 10 g·m/sec, as measured using a tack tester, with a temperature for a probe end being 150° C. and a press holding time being 0.01 seconds; and an integrated value f2 for stress of the toner is at least 30 g·m/sec, as measured using a tack tester, with a temperature for a probe end being 150° C. and a press holding time being 0.1 seconds.Type: GrantFiled: June 23, 2017Date of Patent: February 5, 2019Assignee: CANON KABUSHIKI KAISHAInventors: Takashi Matsui, Naoki Okamoto, Yuujirou Nagashima, Keisuke Tanaka, Shohei Tsuda, Kosuke Fukudome, Takuya Mizuguchi
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Publication number: 20180329323Abstract: A toner comprising: a toner particle containing a binder resin and a colorant; and an external additive, wherein the external additive is a composite particle having an organic substance and an organosilicon polymer coating layer on the surface of the organic substance, and when a curve for the variation (dE?/dT) in the storage elastic modulus E? of the toner with respect to temperature T [° C.] is obtained on the basis of a curve of the temperature T—the storage elastic modulus E? [Pa] of the toner, as determined by powder dynamic viscoelasticity measurements of the toner, the relative minimum value on the lowest temperature side between the onset temperature and 90° C. is ?1.35×108 or less.Type: ApplicationFiled: May 2, 2018Publication date: November 15, 2018Inventors: Sho Kimura, Shuhei Moribe, Takashi Matsui, Hiroyuki Tomono, Shotaro Nomura, Atsuhiko Ohmori, Takuya Mizuguchi, Tatsuya Saeki, Katsuhisa Yamazaki
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Publication number: 20180074425Abstract: A toner comprising an external additive A, and a toner particle containing a binder resin and a colorant, wherein the external additive A: i) is an external additive that has a charge control agent on the surface thereof; ii) has a wall friction angle ? calculated from the following formula (1) of not more than 25.0° ?=?/5.0??formula (1); iii) has a number-average particle diameter (D1) of primary particles of at least 70 nm and not more than 500 nm; and iv) has a solidity as given by the following formula (2) of at least 0.40 and not more than 0.90 solidity=area of external additive A/area of region encompassed by envelope for external additive A?? formula (2).Type: ApplicationFiled: September 7, 2017Publication date: March 15, 2018Inventors: Takuya Mizuguchi, Kazuo Terauchi, Yojiro Hotta, Takeshi Naka, Motohide Shiozawa, Masami Fujimoto