Patents by Inventor Kyoko Abe
Kyoko Abe 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: 11968889Abstract: A light-emitting element having a long lifetime is provided. A light-emitting element exhibiting high emission efficiency in a high luminance region is provided. A light-emitting element includes a light-emitting layer between a pair of electrodes. The light-emitting layer contains a first organic compound, a second organic compound, and a phosphorescent compound. The first organic compound is represented by a general formula (GO). The molecular weight of the first organic compound is greater than or equal to 500 and less than or equal to 2000. The second organic compound is a compound having an electron-transport property. In the general formula (GO), Ar1 and Ar2 each independently represent a fluorenyl group, a spirofluorenyl group, or a biphenyl group, and Ar3 represents a substituent including a carbazole skeleton.Type: GrantFiled: June 11, 2021Date of Patent: April 23, 2024Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Takao Hamada, Hiromi Seo, Kanta Abe, Kyoko Takeda, Satoshi Seo
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Patent number: 9658574Abstract: A powder container is provided. The powder container includes a powder storage and a conveyer. The powder storage stores a powder to be used for image formation and has a vent hole to pass air between an inside and an outside of the powder storage. The conveyer conveys the powder inside the powder storage. The vent hole is on an upper surface of the powder storage facing the conveyer.Type: GrantFiled: March 31, 2016Date of Patent: May 23, 2017Assignee: Ricoh Company, Ltd.Inventors: Shoh Tsuritani, Tomohiro Kubota, Yoshiyuki Shimizu, Masato Tsuji, Akinori Harada, Kyoko Abe
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Patent number: 9551956Abstract: An image forming apparatus is provided. The image forming apparatus includes a photoconductor, an irradiator, a developing device including a developing roller, a development bias applying device, a toner supplying roller and a supply bias applying device, and a controller. The controller changes supply bias offset by reference to at least one of five parameters including photoconductor travel distance, operation temperature of the developing device, operation humidity of the developing device, continuous operating time of the developing device, and color information of image to be produced. After changing the supply bias offset, the controller forms plural toner patterns for image density adjustment on the photoconductor by changing the development bias, and sets the development bias to a certain bias based on the image densities of the plural toner patterns so that the image produced by the developing device has a targeted image density.Type: GrantFiled: January 15, 2016Date of Patent: January 24, 2017Assignee: Ricoh Company, Ltd.Inventors: Kyoko Abe, Yuji Nagatomo, Shintaro Yamada, Shinji Aoki
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Publication number: 20160299455Abstract: A powder container is provided. The powder container includes a powder storage and a conveyer. The powder storage stores a powder to be used for image formation and has a vent hole to pass air between an inside and an outside of the powder storage. The conveyer conveys the powder inside the powder storage. The vent hole is on an upper surface of the powder storage facing the conveyer.Type: ApplicationFiled: March 31, 2016Publication date: October 13, 2016Inventors: Shoh TSURITANI, Tomohiro KUBOTA, Yoshiyuki SHIMIZU, Masato TSUJI, Akinori HARADA, Kyoko ABE
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Publication number: 20160209774Abstract: An image forming apparatus is provided. The image forming apparatus includes a photoconductor, an irradiator, a developing device including a developing roller, a development bias applying device, a toner supplying roller and a supply bias applying device, and a controller. The controller changes supply bias offset by reference to at least one of five parameters including photoconductor travel distance, operation temperature of the developing device, operation humidity of the developing device, continuous operating time of the developing device, and color information of image to be produced. After changing the supply bias offset, the controller forms plural toner patterns for image density adjustment on the photoconductor by changing the development bias, and sets the development bias to a certain bias based on the image densities of the plural toner patterns so that the image produced by the developing device has a targeted image density.Type: ApplicationFiled: January 15, 2016Publication date: July 21, 2016Applicant: Ricoh Company, Ltd.Inventors: Kyoko Abe, Yuji Nagatomo, Shintaro Yamada, Shinji Aoki
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Patent number: 9335663Abstract: A seal is provided to contact a rotating body installed in an image forming apparatus. Pencil hardness of the sealing element is about 2H or more and a water drop contact angle thereof is about 90 degrees or more.Type: GrantFiled: January 5, 2015Date of Patent: May 10, 2016Assignee: Ricoh Company, Ltd.Inventors: Kyoko Abe, Tomohiro Kubota, Takahiro Sanada, Yuji Nagatomo
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Patent number: 9164435Abstract: A fixing device includes a nip formation pad disposed opposite an inner circumferential surface of an endless belt and a pressing rotary body pressed against the nip formation pad via the endless belt to form a fixing nip between the endless belt and the pressing rotary body, through which a recording medium is conveyed. The pressing rotary body has a diameter increasing from a center to each lateral end in an axial direction thereof. The nip formation pad includes a projection disposed downstream from a rotation axis of the pressing rotary body in a recording medium conveyance direction. The projection projects toward the pressing rotary body in an amount increasing from each lateral end to a center in a longitudinal direction of the nip formation pad parallel to the axial direction of the pressing rotary body.Type: GrantFiled: November 19, 2013Date of Patent: October 20, 2015Assignee: Ricoh Company, Ltd.Inventors: Tomoya Adachi, Atsushi Takehara, Tomohiko Fujii, Yutaka Naitoh, Minoru Toyoda, Hitoshi Fujiwara, Yasuharu Kawarasaki, Naoki Nakatake, Keiji Kunimi, Takahiro Sanada, Yasuhide Matsuno, Rumi Miyazaki, Kyoko Abe, Takeshi Yamashita, Yasuhiro Fujiwara
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Patent number: 9134642Abstract: An image forming apparatus includes an image forming device to form a toner image according to image data, a density adjustment toner pattern, and a timing adjustment toner pattern on an image bearer, a detector to detect the density adjustment toner pattern and the timing adjustment toner pattern, and an image density adjustment unit to execute image density adjustment based on an amount of toner adhering to the density adjustment toner pattern detected by the toner amount detector. The image density adjustment unit causes the image forming device to form the timing adjustment toner pattern before the density adjustment toner pattern is formed, and the image density adjustment unit adjusts a detection timing of the density adjustment toner pattern based on a detection timing of the timing adjustment toner pattern detected by the toner amount detector.Type: GrantFiled: November 11, 2013Date of Patent: September 15, 2015Assignee: Ricoh Company, Ltd.Inventors: Rumi Miyazaki, Kyoko Abe
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Publication number: 20150192882Abstract: A seal is provided to contact a rotating body installed in an image forming apparatus. Pencil hardness of the sealing element is about 2H or more and a water drop contact angle thereof is about 90 degrees or more.Type: ApplicationFiled: January 5, 2015Publication date: July 9, 2015Applicant: Ricoh Company, Ltd.Inventors: Kyoko Abe, Tomohiro Kubota, Takahiro Sanada, Yuji Nagatomo
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Patent number: 8983323Abstract: Provided is a color image forming apparatus that includes: image carriers that form toner image of black and other colors; an intermediate transfer body that makes contact with the image carriers; and transfer units that transfer the toner images on the image carriers to the intermediate transfer body. A line velocity difference is set between the image carriers and the intermediate transfer body. An accelerated cohesion degree of toner is equal to or larger than 54%. A linear velocity difference X1 between the image carrier for black and the intermediate transfer body satisfies a relation of 0<X1?1.2 mm/sec. A linear velocity difference X2 between the image carriers for the colors and the intermediate transfer body satisfies a relation of 2.1?X2?4.0 mm/sec.Type: GrantFiled: January 25, 2013Date of Patent: March 17, 2015Assignee: Ricoh Company, LimitedInventors: Takeshi Yamashita, Yuji Nagatomo, Naoki Nakatake, Yasuhiro Fujiwara, Takafumi Miyazaki, Yasuhide Matsuno, Takahiro Sanada, Rumi Miyazaki, Kyoko Abe, Tomoya Adachi, Yoshie Iwakura
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Patent number: 8971743Abstract: An image forming apparatus including a latent image bearing member, a charger, a latent image forming device, a developing device, and a transfer device is provided. The transfer device is adapted to transfer a toner image formed on the latent image bearing member onto an intermediate transfer member or a recording medium by action of a transfer elected field in a transfer position where the latent image bearing member faces the transfer device. When a non-charged portion of the latent image bearing member that has not been charged to a predetermined potential by the charger passes through the transfer position, a strength of the transfer electric field is lowered than that in transferring the toner image.Type: GrantFiled: March 25, 2013Date of Patent: March 3, 2015Assignee: Ricoh Company, Ltd.Inventors: Takafumi Miyazaki, Naoki Nakatake, Yuji Nagatomo, Yasuhide Matsuno, Takahiro Sanada, Yasuhiro Fujiwara, Kyoko Abe, Takeshi Yamashita, Tomoya Adachi
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Patent number: 8805222Abstract: An image developing device includes a developer supporting body; a first conveyance path in which a first conveyance member is arranged; a second conveyance path in which a second conveyance member is arranged; and a partition member that partitions the first conveyance path and the second conveyance path and that has a first communication port and a second communication port. The first communication path and the second communication path communicates with each other through the first communication port and the second communication port. The image developing device includes a developer amount detection unit that includes an optical detection unit arranged in the second conveyance path and that optically detects an amount of the developer in the image forming device. The developer is caused to accumulate in the vicinity of the developer amount detection unit.Type: GrantFiled: March 5, 2012Date of Patent: August 12, 2014Assignee: Ricoh Company, Ltd.Inventors: Naoki Nakatake, Tomohiro Kubota, Shoh Tsuritani, Yuji Nagatomo, Yasuhide Matsuno, Hiroaki Katoh, Tomoya Adachi, Rumi Miyazaki, Takafumi Miyazaki, Takeshi Yamashita, Kyoko Abe, Yasuhiro Fujiwara, Takahiro Sanada
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Publication number: 20140153941Abstract: An image forming apparatus includes an image forming device to form a toner image according to image data, a density adjustment toner pattern, and a timing adjustment toner pattern on an image bearer, a detector to detect the density adjustment toner pattern and the timing adjustment toner pattern, and an image density adjustment unit to execute image density adjustment based on an amount of toner adhering to the density adjustment toner pattern detected by the toner amount detector. The image density adjustment unit causes the image forming device to form the timing adjustment toner pattern before the density adjustment toner pattern is formed, and the image density adjustment unit adjusts a detection timing of the density adjustment toner pattern based on a detection timing of the timing adjustment toner pattern detected by the toner amount detector.Type: ApplicationFiled: November 11, 2013Publication date: June 5, 2014Inventors: Rumi MIYAZAKI, Kyoko Abe
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Publication number: 20140153982Abstract: A fixing device includes a nip formation pad disposed opposite an inner circumferential surface of an endless belt and a pressing rotary body pressed against the nip formation pad via the endless belt to form a fixing nip between the endless belt and the pressing rotary body, through which a recording medium is conveyed. The pressing rotary body has a diameter increasing from a center to each lateral end in an axial direction thereof. The nip formation pad includes a projection disposed downstream from a rotation axis of the pressing rotary body in a recording medium conveyance direction. The projection projects toward the pressing rotary body in an amount increasing from each lateral end to a center in a longitudinal direction of the nip formation pad parallel to the axial direction of the pressing rotary body.Type: ApplicationFiled: November 19, 2013Publication date: June 5, 2014Applicant: Ricoh Company, Ltd.Inventors: Tomoya ADACHI, Atsushi TAKEHARA, Tomohiko FUJII, Yutaka NAITOH, Minoru TOYODA, Hitoshi FUJIWARA, Yasuharu KAWARASAKI, Naoki NAKATAKE, Keiji KUNIMI, Takahiro SANADA, Yasuhide MATSUNO, Rumi MIYAZAKI, Kyoko ABE, Takeshi YAMASHITA, Yasuhiro FUJIWARA
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Publication number: 20130266332Abstract: An image forming apparatus including a latent image bearing member, a charger, a latent image forming device, a developing device, and a transfer device is provided. The transfer device is adapted to transfer a toner image formed on the latent image bearing member onto an intermediate transfer member or a recording medium by action of a transfer elected field in a transfer position where the latent image bearing member faces the transfer device. When a non-charged portion of the latent image bearing member that has not been charged to a predetermined potential by the charger passes through the transfer position, a strength of the transfer electric field is lowered than that in transferring the toner image.Type: ApplicationFiled: March 25, 2013Publication date: October 10, 2013Inventors: Takafumi MIYAZAKI, Naoki NAKATAKE, Yuji NAGATOMO, Yasuhide MATSUNO, Takahiro SANADA, Yasuhiro FUJIWARA, Kyoko ABE, Takeshi YAMASHITA, Tomoya ADACHI
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Publication number: 20130236217Abstract: A development device to develop a latent image using developer having a degree of agglomeration of 54% or greater includes a developer bearer to carry developer thereon, and a developer supply member to contact the developer bearer to supply developer to a surface of the developer bearer. The developer supply member is disposed to satisfy at least one of two conditions: a biting amount of the developer supply member relative to the developer bearer is 0.7 mm or greater; and a contact pressure of the developer supply member against the developer bearer is 30 N/m or greater.Type: ApplicationFiled: March 12, 2013Publication date: September 12, 2013Inventors: Yuji NAGATOMO, Yasuhide Matsuno, Takahiro Sanada, Naoki Nakatake, Takafumi Miyazaki, Yasuhiro Fujiwara, Kyoko Abe, Rumi Miyazaki, Takeshi Yamashita, Tomoya Adachi
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Publication number: 20130195487Abstract: Provided is a color image forming apparatus that includes: image carriers that form toner image of black and other colors; an intermediate transfer body that makes contact with the image carriers; and transfer units that transfer the toner images on the image carriers to the intermediate transfer body. A line velocity difference is set between the image carriers and the intermediate transfer body. An accelerated cohesion degree of toner is equal to or larger than 54%. A linear velocity difference X1 between the image carrier for black and the intermediate transfer body satisfies a relation of 0<X1?1.2 mm/sec. A linear velocity difference X2 between the image carriers for the colors and the intermediate transfer body satisfies a relation of 2.1?X2?4.0 mm/sec.Type: ApplicationFiled: January 25, 2013Publication date: August 1, 2013Inventors: Takeshi YAMASHITA, Yuji NAGATOMO, Naoki NAKATAKE, Yasuhiro FUJIWARA, Takafumi MIYAZAKI, Yasuhide MATSUNO, Takahiro SANADA, Rumi MIYAZAKI, Kyoko ABE, Tomoya ADACHI, Yoshie IWAKURA
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Publication number: 20130058670Abstract: An image developing device includes a developer supporting body; a first conveyance path in which a first conveyance member is arranged; a second conveyance path in which a second conveyance member is arranged; and a partition member that partitions the first conveyance path and the second conveyance path and that has a first communication port and a second communication port. The first communication path and the second communication path communicates with each other through the first communication port and the second communication port. The image developing device includes a developer amount detection unit that includes an optical detection unit arranged in the second conveyance path and that optically detects an amount of the developer in the image forming device. The developer is caused to accumulate in the vicinity of the developer amount detection unit.Type: ApplicationFiled: March 5, 2012Publication date: March 7, 2013Inventors: Naoki Nakatake, Tomohiro Kubota, Shoh Tsuritani, Yuji Nagatomo, Yasuhide Matsuno, Hiroaki Katoh, Tomoya Adachi, Rumi Miyazaki, Takafumi Miyazaki, Takeshi Yamashita, Kyoko Abe, Yasuhiro Fujiwara, Takahiro Sanada
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Publication number: 20060239939Abstract: It is intended to provide deodorant compositions which are nondetrimental to the environment and yet exhibit an excellent deodorizing effect on a wide range of offensive odor components including lower fatty acids. It is also intended to provide deodorant compositions giving off little or no foul odor derived from the substrate as time passes, which is different from the offensive odor to be deodorized. This is accomplished with deodorant compositions containing lignin and an enzyme which oxidizes phenolic compounds. Preferable examples of the lignin include water-soluble lignosulfonic acid and its salt. These compositions may further contain a fragrance and/or a flavor.Type: ApplicationFiled: October 31, 2003Publication date: October 26, 2006Applicants: Takasago International Corporation, Novozymes AktieselsxabInventors: Tadahiro Hiramoto, Yasutaka Mishima, Taichi Yamamoto, Tomas Hansen, Kyoko Abe
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Publication number: 20050147573Abstract: The present invention relates to methods and compositions for reducing odor from a locus by contacting the locus with an enzymatic agent, an oxidizing agent and a shredded, sliced or crushed plant material which naturally contains one or more phenolic compounds.Type: ApplicationFiled: April 24, 2003Publication date: July 7, 2005Applicant: NOVOZYMES A/SInventors: Kyoko Abe, Naoto Uyama, Hiromichi Sakaguchi