Patents by Inventor Rumi Miyazaki
Rumi Miyazaki 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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Publication number: 20240019806Abstract: A printed material, an image forming apparatus, and a data acquisition device. The printed material includes a printed confidential information image visible under a special condition, and an information image having information on a position of the confidential information image. The image forming apparatus includes an image forming device configured to form an image on a recording medium to form the printed material. The data acquisition device includes circuitry, and the circuitry is configured to acquire confidential information from the confidential information image on the printed, specify the position of the confidential information image from the information image, and display position information of the confidential information image.Type: ApplicationFiled: September 25, 2023Publication date: January 18, 2024Applicant: Ricoh Company, Ltd.Inventors: Hiroki ATARI, Masato TANAKA, Keiji KUNIMI, Rumi MIYAZAKI
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Publication number: 20220082988Abstract: A printed material, an image forming apparatus, and a data acquisition device. The printed material includes a printed confidential information image visible under a special condition, and an information image having information on a position of the confidential information image. The image forming apparatus includes an image forming device configured to form an image on a recording medium to form the printed material. The data acquisition device includes circuitry, and the circuitry is configured to acquire confidential information from the confidential information image on the printed, specify the position of the confidential information image from the information image, and display position information of the confidential information image.Type: ApplicationFiled: August 19, 2021Publication date: March 17, 2022Inventors: Hiroki ATARI, Masato TANAKA, Keiji KUNIMI, Rumi MIYAZAKI
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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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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: 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: 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: 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: 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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Patent number: 8295717Abstract: An image forming apparatus includes an image carrier, a toner-image forming unit, a photosensor, an information obtaining unit, and a toner-amount calculating unit. The toner-image forming unit forms a toner image on the image carrier with toner. The photosensor detects a toner area where the toner is sticking to the image carrier. The information obtaining unit obtains particle-size-change information about how particle size distribution of the toner changes over time. The toner-amount calculating unit calculates a toner amount of the toner image based on the toner area and the particle-size-change information.Type: GrantFiled: October 20, 2009Date of Patent: October 23, 2012Assignee: Ricoh Company, LimitedInventors: Rumi Miyazaki, Atsushi Takehara, Keiji Kunimi
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Publication number: 20100098441Abstract: An image forming apparatus includes an image carrier, a toner-image forming unit, a photosensor, an information obtaining unit, and a toner-amount calculating unit. The toner-image forming unit forms a toner image on the image carrier with toner. The photosensor detects a toner area where the toner is sticking to the image carrier. The information obtaining unit obtains particle-size-change information about how particle size distribution of the toner changes over time. The toner-amount calculating unit calculates a toner amount of the toner image based on the toner area and the particle-size-change information.Type: ApplicationFiled: October 20, 2009Publication date: April 22, 2010Inventors: Rumi MIYAZAKI, Atsushi TAKEHARA, Keiji KUNIMI