Patents by Inventor Suzuka Amemori
Suzuka Amemori 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: 10859932Abstract: A toner, including: a polyester resin, wherein the polyester resin has a structure represented by any one of formulas 1) to 3) below: 1) R1-(NHCONH-R2)n-, 2) R1-(NHCOO-R2)n-, and 3) R1-(OCONH-R2)n-, where n is 3 or more, R1 represents an aromatic organic group or an aliphatic organic group, and R2 represents a group derived from a resin that is polyester formed of polycarboxylic acid, polyol, or both thereof; or that is a modified polyester obtained by modifying polyester with isocyanate.Type: GrantFiled: October 8, 2015Date of Patent: December 8, 2020Assignee: Ricoh Company, Ltd.Inventors: Tsuyoshi Sugimoto, Shinya Nakayama, Hiroshi Yamada, Hideyuki Santo, Ryuta Chiba, Suzuka Amemori, Kohsuke Nagata
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Patent number: 10088766Abstract: A layered inorganic mineral including a surface treated with a fluorine-containing compound, where the layered inoganic mineral that can be favorably used for a toner that is excellent in high charging ability, charging stability, and low temperature fixing ability, and that can exhibits high reliability during cleaning.Type: GrantFiled: November 30, 2015Date of Patent: October 2, 2018Assignee: Ricoh Company, Ltd.Inventors: Hideyuki Santo, Tsuyoshi Sugimoto, Shinya Nakayama, Suzuka Amemori, Hiroshi Yamada, Ryuta Chiba, Kohsuke Nagata
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Patent number: 9921503Abstract: A toner including: a pigment; polyester resin A that is insoluble in tetrahydrofuran (THF); and polyester resin B that is soluble in THF, wherein the toner satisfies requirements (1) to (3) below: (1) the polyester resin A includes one or more aliphatic diols including from 3 through 10 carbon atoms, as a component constituting the polyester resin A; (2) the polyester resin B includes at least an alkylene glycol in an amount of 40 mol % or more, as a component constituting the polyester resin B; and (3) a glass transition temperature (Tg1st) of the toner at first heating in differential scanning calorimetry (DSC) of the toner is from 20° C. through 50° C.Type: GrantFiled: January 6, 2015Date of Patent: March 20, 2018Assignee: Ricoh Company, Ltd.Inventors: Hiroshi Yamada, Tsuyoshi Sugimoto, Susumu Chiba, Shinsuke Nagai, Kohsuke Nagata, Shinya Nakayama, Yuka Mizoguchi, Suzuka Amemori
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Patent number: 9880479Abstract: Toner that includes a polyester resin, fluorine and aluminum. The toner satisfies formulae (1) and (2), 1.00?AB/B?0.50??(1) 0?(A?AB)/A?0.25??(2) where A represents an area where the fluorine exists measured by Energy Dispersive X-ray Spectroscopy (EDS), B represents an area where the aluminum exists measured by Energy Dispersive X-ray Spectroscopy (EDS) and AB represents an overlapping area between A and B. Toner stored unit, image forming apparatus, and image forming method.Type: GrantFiled: January 12, 2017Date of Patent: January 30, 2018Assignee: RICOH COMPANY, LTD.Inventors: Hideyuki Santoh, Tsuyoshi Sugimoto, Akinori Saitoh, Shin Hasegawa, Suzuka Amemori, Kohsuke Nagata, Koh Ohnuma
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Publication number: 20180024452Abstract: A toner, including: a polyester resin, wherein the polyester resin has a structure represented by any one of formulas 1) to 3) below: 1) R1-(NHCONH-R2)n-, 2) R1-(NHCOO-R2)n-, and 3) R1-(OCONH-R2)n-, where n is 3 or more, R1 represents an aromatic organic group or an aliphatic organic group, and R2 represents a group derived from a resin that is polyester formed of polycarboxylic acid, polyol, or both thereof; or that is a modified polyester obtained by modifying polyester with isocyanate.Type: ApplicationFiled: October 8, 2015Publication date: January 25, 2018Inventors: Tsuyoshi SUGIMOTO, Shinya NAKAYAMA, Hiroshi YAMADA, Hideyuki SANTO, Ryuta CHIBA, Suzuka AMEMORI, Kohsuke NAGATA
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Publication number: 20170371257Abstract: A layered inorganic mineral including a surface treated with a fluorine-containing compound, where the layered inoganic mineral that can be favorably used for a toner that is excellent in high charging ability, charging stability, and low temperature fixing ability, and that can exhibits high reliability during cleaning.Type: ApplicationFiled: November 30, 2015Publication date: December 28, 2017Inventors: Hideyuki SANTO, Tsuyoshi SUGIMOTO, Shinya NAKAYAMA, Suzuka AMEMORI, Hiroshi YAMADA, Ryuta CHIBA, Kohsuke NAGATA
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Patent number: 9851649Abstract: A toner includes a binder resin including a copolymer resin containing structural units derived from crystalline and non-crystalline resins, respectively. Spin-spin relaxation time (t50) of the toner at 50° C. measured by pulse NMR is ?0.05 msec., spin-spin relaxation time (t130) at 130° C. when warmed from 50° C. to 130° C. is >15 msec., and spin-spin relaxation time (t?70) at 70° C. when cooled from 130° C. to 70° C. is ?1.00 msec. A binarized image obtained by binarizing a phase image of the toner observed by a tapping mode AFM based on intermediate value between maximum and minimum phase difference values in the phase image includes first phase difference images constituted by large phase-difference portions and a second phase difference image constituted by a small phase-difference portion. The first phase difference images are dispersed in the second phase difference image. The dispersion diameter of the first phase difference images is 150 nm or less.Type: GrantFiled: November 27, 2013Date of Patent: December 26, 2017Assignee: Ricoh Company, Ltd.Inventors: Keiji Makabe, Tsuyoshi Sugimoto, Akinori Saito, Suzuka Amemori, Toyoshi Sawada, Hiroshi Yamashita, Shinya Nakayama, Atsushi Yamamoto, Daisuke Asahina, Satoyuki Sekiguchi
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Patent number: 9785074Abstract: A polyester resin for a toner, the polyester resin including: a segment derived from an alcohol component; and a segment derived from a carboxylic acid component, wherein the alcohol component includes a trivalent or higher aliphatic alcohol, and wherein the polyester resin satisfies Expressions (1) to (3) below: 500 ? Weight ? ? average ? ? molecular ? ? weight ? ? ( Mw ) ( Valence ? ? of ? ? the ? ? trivalent ? ? or higher ? ? aliphatic ? ? alcohol ) × ( Amount ? ? of ? ? the ? ? trivalent ? ? or higher ? ? aliphatic ? ? alcohol ) ? 4 , 000 ; Expression ? ? ( 1 ) 4,000?Weight average molecular weight (Mw)?25,000?? Expression (2); and 0.5?(Amount of the trivalent or higher aliphatic alcohol)?6.Type: GrantFiled: January 6, 2015Date of Patent: October 10, 2017Assignee: Ricoh Company, Ltd.Inventors: Kohsuke Nagata, Shinya Nakayama, Tsuyoshi Sugimoto, Hiroshi Yamada, Susumu Chiba, Shinsuke Nagai, Suzuka Amemori
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Patent number: 9720339Abstract: A toner including at least a crystalline resin as a binder resin, wherein a tetrahydrofuran soluble content of the toner includes 5.0% or more as a peak area of a component having a molecular weight of 100,000 or greater in a molecular weight distribution measured by gel permeation chromatography, and the tetrahydrofuran soluble content of the toner has a weight-average molecular weight of 20,000 to 60,000.Type: GrantFiled: July 26, 2016Date of Patent: August 1, 2017Assignee: Ricoh Company, Ltd.Inventors: Shingo Sakashita, Shinya Nakayama, Masahide Yamada, Atsushi Yamamoto, Hideyuki Santo, Yukiko Nakajima, Suzuka Amemori
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Publication number: 20170199476Abstract: Toner that includes a polyester resin, fluorine and aluminum. The toner satisfies formulae (1) and (2), 1.00?AB/B?0.50 ??(1) 0?(A?AB)/A?0.25 ??(2) where A represents an area where the fluorine exists measured by Energy Dispersive X-ray Spectroscopy (EDS), B represents an area where the aluminum exists measured by Energy Dispersive X-ray Spectroscopy (EDS) and AB represents an overlapping area between A and B. Toner stored unit, image forming apparatus, and image forming method.Type: ApplicationFiled: January 12, 2017Publication date: July 13, 2017Inventors: Hideyuki SANTOH, Tsuyoshi SUGIMOTO, Akinori SAITOH, Shin HASEGAWA, Suzuka AMEMORI, Kohsuke NAGATA, Koh OHNUMA
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Patent number: 9594322Abstract: A toner is provided. The toner includes a crosslinked polyester resin, and a block copolymer. The crosslinked polyester resin includes a diol component, which includes an aliphatic diol component having 3 to 10 carbon atoms in an amount of 50% by mole, and a crosslinked component, which is at least one of a crosslinked component of an aliphatic alcohol having three or more valences and a crosslinked component of an aliphatic acid having three or more valences, and the block copolymer includes a crystalline segment (a) and a non-crystalline segment (b). The toner has a first glass transition temperature (Tg1st) of from 20° C. to 50° C., which is determined by subjecting the toner to differential scanning calorimetry (DSC) and measuring a glass transition temperature in a first temperature rising process in the differential scanning calorimetry (DSC).Type: GrantFiled: August 28, 2014Date of Patent: March 14, 2017Assignee: Ricoh Company, Ltd.Inventors: Suzuka Amemori, Tsuyoshi Sugimoto, Akinori Saito, Toyoshi Sawada, Keiji Makabe
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Patent number: 9557671Abstract: A toner, including: base particles containing a polyester resin, a colorant, and a release agent, wherein the toner has a glass transition temperature (Tg1st) of 20° C. to 50° C. where the glass transition temperature (Tg1st) is measured in first heating of differential scanning calorimetry (DSC) of the toner, wherein tetrahydrofuran (THF) insoluble matter of the toner has a glass transition temperature [Tg2nd (THF insoluble matter)] of 30° C. or lower where the glass transition temperature [Tg2nd (THF insoluble to matter)] is measured in second heating of differential scanning calorimetry (DSC) of the THF insoluble matter, and wherein 50% or less of the colorant is present within a region of 1,000 nm from a surface of each of the base particles toward a center thereof.Type: GrantFiled: February 24, 2015Date of Patent: January 31, 2017Assignee: Ricoh Company, Ltd.Inventors: Ryuta Chiba, Shinya Nakayama, Hiroshi Yamada, Minoru Masuda, Akinori Saitoh, Hideyuki Santo, Shinsuke Nagai, Akihiro Takeyama, Hiroyuki Takeda, Tsuyoshi Sugimoto, Suzuka Amemori, Kohsuke Nagata
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Publication number: 20170017175Abstract: A toner including: a pigment; polyester resin A that is insoluble in tetrahydrofuran (THF); and polyester resin B that is soluble in THF, wherein the toner satisfies requirements (1) to (3) below: (1) the polyester resin A includes one or more aliphatic diols including from 3 through 10 carbon atoms, as a component constituting the polyester resin A; (2) the polyester resin B includes at least an alkylene glycol in an amount of 40 mol % or more, as a component constituting the polyester resin B; and (3) a glass transition temperature (Tg1st) of the toner at first heating in differential scanning calorimetry (DSC) of the toner is from 20° C. through 50° C.Type: ApplicationFiled: January 6, 2015Publication date: January 19, 2017Inventors: Hiroshi YAMADA, Tsuyoshi SUGIMOTO, Susumu CHIBA, Shinsuke NAGAI, Kohsuke NAGATA, Shinya NAKAYAMA, Yuka MIZOGUCHI, Suzuka AMEMORI
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Publication number: 20170010550Abstract: A polyester resin for a toner, the polyester resin including: a segment derived from an alcohol component; and a segment derived from a carboxylic acid component, wherein the alcohol component includes a trivalent or higher aliphatic alcohol, and wherein the polyester resin satisfies Expressions (1) to (3) below: 500 ? Weight ? ? average ? ? molecular ? ? weight ? ? ( Mw ) ( Valence ? ? of ? ? the ? ? trivalent ? ? or higher ? ? aliphatic ? ? alcohol ) × ( Amount ? ? of ? ? the ? ? trivalent ? ? or higher ? ? aliphatic ? ? alcohol ) ? 4 , 000 ; Expression ? ? ( 1 ) 4,000?Weight average molecular weight (Mw)?25,000?? Expression (2); and 0.5?(Amount of the trivalent or higher aliphatic alcohol)?6.Type: ApplicationFiled: January 6, 2015Publication date: January 12, 2017Inventors: Kohsuke NAGATA, Shinya NAKAYAMA, Tsuyoshi SUGIMOTO, Hiroshi YAMADA, Susumu CHIBA, Shinsuke NAGAI, Suzuka AMEMORI
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Patent number: 9519235Abstract: A toner including at least a crystalline resin as a binder resin, wherein a tetrahydrofuran soluble content of the toner includes 5.0% or more as a peak area of a component having a molecular weight of 100,000 or greater in a molecular weight distribution measured by gel permeation chromatography, and the tetrahydrofuran soluble content of the toner has a weight-average molecular weight of 20,000 to 60,000.Type: GrantFiled: April 23, 2015Date of Patent: December 13, 2016Assignee: Ricoh Company, Ltd.Inventors: Shingo Sakashita, Shinya Nakayama, Masahide Yamada, Atsushi Yamamoto, Hideyuki Santo, Yukiko Nakajima, Suzuka Amemori
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Publication number: 20160334726Abstract: A toner including at least a crystalline resin as a binder resin, wherein a tetrahydrofuran soluble content of the toner includes 5.0% or more as a peak area of a component having a molecular weight of 100,000 or greater in a molecular weight distribution measured by gel permeation chromatography, and the tetrahydrofuran soluble content of the toner has a weight-average molecular weight of 20,000 to 60,000.Type: ApplicationFiled: July 26, 2016Publication date: November 17, 2016Inventors: Shingo SAKASHITA, Shinya NAKAYAMA, Masahide YAMADA, Atsushi YAMAMOTO, Hideyuki SANTO, Yukiko NAKAJIMA, Suzuka AMEMORI
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Patent number: 9400439Abstract: A toner including a crystalline resin wherein the crystalline resin contains a crystalline resin having a urethane bond, a urea bond or both thereof, and wherein the crystalline resin has an average crystallite diameter of 20 nm to 70 nm.Type: GrantFiled: September 10, 2013Date of Patent: July 26, 2016Assignee: Ricoh Company, Ltd.Inventors: Kousuke Nagata, Masahide Yamada, Shinya Nakayama, Akiyoshi Sabu, Tatsuya Morita, Takamasa Hase, Suzuka Amemori, Rintaro Takahashi
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Publication number: 20160091812Abstract: A toner includes a binder resin including a copolymer resin containing structural units derived from crystalline and non-crystalline resins, respectively. Spin-spin relaxation time (t50) of the toner at 50° C. measured by pulse NMR is ?0.05 msec., spin-spin relaxation time (t130) at 130° C. when warmed from 50° C. to 130° C. is >15 msec., and spin-spin relaxation time (t?70) at 70° C. when cooled from 130° C. to 70° C. is ?1.00 msec. A binarized image obtained by binarizing a phase image of the toner observed by a tapping mode AFM based on intermediate value between maximum and minimum phase difference values in the phase image includes first phase difference images constituted by large phase-difference portions and a second phase difference image constituted by a small phase-difference portion. The first phase difference images are dispersed in the second phase difference image. The dispersion diameter of the first phase difference images is 150 nm or less.Type: ApplicationFiled: November 27, 2013Publication date: March 31, 2016Inventors: Keiji MAKABE, Tsuyoshi SUGIMOTO, Akinori SAITO, Suzuka AMEMORI, Toyoshi SAWADA, Hiroshi YAMASHITA, Shinya NAKAYAMA, Atsushi YAMAMOTO, Daisuke ASAHINA, Satoyuki SEKIGUCHI
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Patent number: 9141013Abstract: An electrophotographic toner including: a binder resin, wherein the binder resin has one glass transition temperature Tg and the glass transition temperature Tg of the binder resin is within 25° C. to 65° C. as measured in second heating with a differential scanning calorimeter at a heating rate of 5° C./min, and wherein a phase image of the binder resin obtained with an atomic force microscope (AFM) of tapping mode contains first phase difference regions and a second phase difference region such that the first phase difference regions are dispersed in the second phase difference region, where the first phase difference regions correspond to greater phase difference regions and the second phase difference region corresponds to a smaller phase difference region when an intermediate value between a maximum value and a minimum value of the phase differences is used as a threshold.Type: GrantFiled: September 12, 2012Date of Patent: September 22, 2015Assignee: Ricoh Company, Ltd.Inventors: Yoshihiro Moriya, Masahide Yamada, Taichi Nemoto, Yukiko Nakajima, Yoshitaka Yamauchi, Keiji Makabe, Daiki Yamashita, Suzuka Amemori, Akiyoshi Sabu
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Patent number: 9134638Abstract: A toner including at least a crystalline resin as a binder resin, wherein a tetrahydrofuran soluble content of the toner includes 5.0% or more as a peak area of a component having a molecular weight of 100,000 or greater in a molecular weight distribution measured by gel permeation chromatography, and the tetrahydrofuran soluble content of the toner has a weight-average molecular weight of 20,000 to 60,000.Type: GrantFiled: October 17, 2012Date of Patent: September 15, 2015Assignee: Ricoh Company, Ltd.Inventors: Shingo Sakashita, Shinya Nakayama, Masahide Yamada, Atsushi Yamamoto, Hideyuki Santo, Yukiko Nakajima, Suzuka Amemori