Patents by Inventor Tohru Moriya
Tohru Moriya 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: 11226570Abstract: A toner comprising a binder resin and a release agent is provided. When the toner is subjected to a FTIR-ATR mapping within a measurement range in a 50 ?m square, divided in 1,024 pixels each in a 1.56 ?m square, an average value of an intensity ratio of an absorption spectrum peak at a wavenumber of 2850 cm?1 to an absorption spectrum peak at a wavenumber of 828 cm?1 in each of the pixels is from 0.10 to 0.19, and a proportion of pixels in which the intensity ratio is 0.20 or higher to all the pixels is from 5% to 10%.Type: GrantFiled: June 12, 2020Date of Patent: January 18, 2022Assignee: RICOH COMPANY, LTD.Inventors: Kohei Hayasaka, Tohru Moriya, Yousuke Suzuki, Atsushi Sasai, Kazuki Washizu
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Publication number: 20200401061Abstract: A toner comprising a binder resin and a release agent is provided. When the toner is subjected to a FTIR-ATR mapping within a measurement range in a 50 ?m square, divided in 1,024 pixels each in a 1.56 ?m square, an average value of an intensity ratio of an absorption spectrum peak at a wavenumber of 2850 cm?1 to an absorption spectrum peak at a wavenumber of 828 cm?1 in each of the pixels is from 0.10 to 0.19, and a proportion of pixels in which the intensity ratio is 0.20 or higher to all the pixels is from 5% to 10%.Type: ApplicationFiled: June 12, 2020Publication date: December 24, 2020Inventors: Kohei Hayasaka, Tohru Moriya, Yousuke Suzuki, Atsushi Sasai, Kazuki Washizu
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Patent number: 10310399Abstract: Provided is a toner including at least a binder resin, and having peak ratio W/R of from 0.20 to 0.70 when measured with FT-IR according to ATR method, W/R being a ratio of height W of maximum spectral peak attributed to bisphenol A skeleton of the toner and observed at from 1,480 cm?1 to 1,520 cm?1 to height R of maximum spectral peak attributed to carbonyl group of the toner and observed at from 1,700 cm?1 to 1,750 cm?1, wherein molecular weight distribution of the toner obtained by GPC of THF-soluble component of the toner has main peak in a range of from 1,000 to 10,000, half value width of the molecular weight distribution is a molecular weight of 20,000 or less, and content of a THF-insoluble component in the toner is from 5% by mass to 40% by mass.Type: GrantFiled: November 26, 2015Date of Patent: June 4, 2019Assignee: Ricoh Company, Ltd.Inventors: Natsuko Matsushita, Tomomi Suzuki, Kohtaroh Ogino, Tohru Moriya
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Publication number: 20190011847Abstract: Provided is a toner including a binder resin, wherein the toner includes a THF-insoluble component in an amount of from 10% by mass through 40% by mass, a molecular weight distribution of a THF-soluble component of the toner measured by gel permeation chromatography (GPC) has a main peak between 10,000 and 16,000, and a half value width of the main peak is a molecular weight of from 60,000 through 90,000, and the THF-soluble component of the toner includes a component having a molecular weight of 2,000 or less in an amount of from 15.0% by mass through 25.0% by mass, and a component having a molecular weight of 100,000 or greater in an amount of 10.0% by mass or less as measured by GPC.Type: ApplicationFiled: September 14, 2018Publication date: January 10, 2019Inventors: Satoshi OGAWA, Masahiro SEKI, Yoshitaka SEKIGUCHI, Tohru MORIYA
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Publication number: 20180329326Abstract: Provided is a toner including at least a binder resin, and having peak ratio W/R of from 0.20 to 0.70 when measured with FT-IR according to ATR method, W/R being a ratio of height W of maximum spectral peak attributed to bisphenol A skeleton of the toner and observed at from 1,480 cm?1 to 1,520 cm?1 to height R of maximum spectral peak attributed to carbonyl group of the toner and observed at from 1,700 cm?1 to 1,750 cm?1, wherein molecular weight distribution of the toner obtained by GPC of THF-soluble component of the toner has main peak in a range of from 1,000 to 10,000, half value width of the molecular weight distribution is a molecular weight of 20,000 or less, and content of a THF-insoluble component in the toner is from 5% by mass to 40% by mass.Type: ApplicationFiled: November 26, 2015Publication date: November 15, 2018Inventors: Natsuko MATSUSHITA, Tomomi SUZUKI, Kohtaroh OGINO, Tohru MORIYA
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Patent number: 10061220Abstract: A toner, containing: a binder resin; and kaolinite, wherein the toner has a molecular weight distribution having a main peak in a range of 1,000 to 10,000, and a half value width of the main peak is 8,000 to 30,000, where the molecular weight distribution is obtained by gel permeation chromatography (GPC) of THF soluble matter of the toner, and wherein the toner contains the kaolinite in an amount of 5% by mass to 35% by mass.Type: GrantFiled: July 17, 2015Date of Patent: August 28, 2018Assignee: Ricoh Company, Ltd.Inventors: Kohtaroh Ogino, Tohru Moriya, Tomomi Suzuki
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Patent number: 9904190Abstract: A toner, including: a binder resin; and calcium carbonate, wherein the toner has a molecular weight distribution having a main peak in a range of 1,000 to 10,000, and a half value width of the main peak is 8,000 to 30,000, where the molecular weight distribution is obtained by GPC (gel permeation chromatography) of THF soluble matter of the toner, and wherein the toner contains the calcium carbonate in an amount of 5% by mass to 35% by mass.Type: GrantFiled: February 2, 2015Date of Patent: February 27, 2018Assignee: Ricoh Company, Ltd.Inventors: Tatsuya Dan, Tohru Moriya, Tomomi Suzuki, Kohtaroh Ogino
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Publication number: 20170212442Abstract: A toner, containing: a binder resin; and kaolinite, wherein the toner has a molecular weight distribution having a main peak in a range of 1,000 to 10,000, and a half value width of the main peak is 8,000 to 30,000, where the molecular weight distribution is obtained by gel permeation chromatography (GPC) of THF soluble matter of the toner, and wherein the toner contains the kaolinite in an amount of 5% by mass to 35% by mass.Type: ApplicationFiled: July 17, 2015Publication date: July 27, 2017Inventors: Kohtaroh OGINO, Tohru MORIYA, Tomomi SUZUKI
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Publication number: 20170082933Abstract: A toner, including: a binder resin; and calcium carbonate, wherein the toner has a molecular weight distribution having a main peak in a range of 1,000 to 10,000, and a half value width of the main peak is 8,000 to 30,000, where the molecular weight distribution is obtained by GPC (gel permeation chromatography) of THF soluble matter of the toner, and wherein the toner contains the calcium carbonate in an amount of 5% by mass to 35% by mass.Type: ApplicationFiled: February 2, 2015Publication date: March 23, 2017Inventors: Tatsuya DAN, Tohru MORIYA, Tomomi SUZUKI, Kohtaroh OGINO
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Patent number: 8232036Abstract: A toner for electrophotography includes toner particles containing at least a binder resin and a colorant, to which strontium titanate and hydrophobic silica as external additives are admixed, wherein the strontium titanate has a BET specific surface area of 20-50 m2/g and contains particles in a rectangular parallelepiped shape and wherein the hydrophobic silica contains hydrophobic silica A that has at least a BET specific surface area of 150-300 m2/g and the surface of which has been treated with an aminosilane and hexamethyldisilazane and hydrophobic silica B that has at least a BET specific surface area of 90-150 m2/g and the surface of which has been treated with hexamethyldisilazane.Type: GrantFiled: September 3, 2008Date of Patent: July 31, 2012Assignee: Tomoegawa Co., Ltd.Inventors: Tohru Moriya, Hitoshi Onoda, Kazuyoshi Hattori, Yoshihito Suwa
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Publication number: 20100239971Abstract: A toner for electrophotography includes toner particles containing at least a binder resin and a colorant, to which strontium titanate and hydrophobic silica as external additives are admixed, wherein the strontium titanate has a BET specific surface area of 20-50 m2/g and contains particles in a rectangular parallelepiped shape and wherein the hydrophobic silica contains hydrophobic silica A that has at least a BET specific surface area of 150-300 m2/g and the surface of which has been treated with an aminosilane and hexamethyldisilazane and hydrophobic silica B that has at least a BET specific surface area of 90-150 m2/g and the surface of which has been treated with hexamethyldisilazane.Type: ApplicationFiled: September 3, 2008Publication date: September 23, 2010Applicant: Tomoegawa Co., Ltd.Inventors: Tohru Moriya, Hitoshi Onoda, Kazuyoshi Hattori, Yoshihito Suwa
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Patent number: 7754407Abstract: A toner for developing electrostatic charge images in which offset phenomenon and winding phenomenon do not occur in a wide temperature range, even if the binding resin contains the alicyclic olefinic resin, that is, a toner for developing electrostatic charge images which is superior in fixability in a high temperature range, and which is superior in melt contamination resistance, is provided. In the toner for developing electrostatic charge images comprises at least binder resin and colorant, the binding resin containing alicyclic olefinic resin (A) and thermoplastic elastomer (B). It is preferable that the alicyclic olefinic resin (A) be a copolymer comprising cyclic olefin (A1) and an acyclic unsaturated monomer (A2) as an element. Additionally, it is preferable that the melting point of the thermoplastic elastomer (B) be 60 to 190° C.Type: GrantFiled: March 24, 2005Date of Patent: July 13, 2010Assignee: Tomoegawa Co., Ltd.Inventor: Tohru Moriya
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Publication number: 20090181317Abstract: Toner for developing an electrostatic image which hardly causes an offset phenomenon and a wrapping phenomenon and which excels in anti-fusing property, and the production process thereof is provided. The toner for developing an electrostatic image contains at least a binder resin and a colorant, in which the binder resin contains an amorphous resin and a crystalline resin, and an endothermal peak having an onset temperature of a starting point ranging from 100 to 150° C., an onset temperature of an end point ranging from 150 to 200° C., and a half value width ranging from 10 to 40° C. is present in a DSC curve while elevating the temperature measured by a differential scanning calorimeter of the toner. This toner can be produced by performing a heat-melt kneading at the temperature defined as T (° C.) having the range specified by the following formula: (Tm?20)?T?(Tm+30), in which the formula, Tm represents the melting point (° C.) of said crystalline resin.Type: ApplicationFiled: September 29, 2005Publication date: July 16, 2009Applicant: TOMOEGAWA CO., LTD.Inventor: Tohru Moriya
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Publication number: 20070134582Abstract: A toner for developing electrostatic charge images in which offset phenomenon and winding phenomenon do not occur in a wide temperature range, even if the binding resin contains the alicyclic olefinic resin, that is, a toner for developing electrostatic charge images which is superior in fixability in a high temperature range, and which is superior in melt contamination resistance, is provided. In the toner for developing electrostatic charge images comprises at least binder resin and colorant, the binding resin containing alicyclic olefinic resin (A) and thermoplastic elastomer (B). It is preferable that the alicyclic olefinic resin (A) be a copolymer comprising cyclic olefin (A1) and an acyclic unsaturated monomer (A2) as an element. Additionally, it is preferable that the melting point of the thermoplastic elastomer (B) be 60 to 190° C.Type: ApplicationFiled: March 24, 2005Publication date: June 14, 2007Applicant: TOMOEGAWA CO., LTD.Inventor: Tohru Moriya