Patents by Inventor Sho Akiyama
Sho Akiyama 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: 11975520Abstract: A sheet processing device is configured to separate a non-bonding portion of a two-ply sheet in which two sheets are overlapped and bonded together at one end as a bonding portion of the two-ply sheet. The sheet processing device includes a first sheet feeder configured to feed the two-ply sheet, a second sheet feeder configured to feed an inner sheet to be inserted between the two sheets of the two-ply sheet in a state in which the non-bonding portion of the two-ply sheet is separated, and circuitry configured to cause the first sheet feeder to feed the two-ply sheet, perform a sheet separating operation on the two-ply sheet to separate the non-bonding portion of the two-ply sheet, and cause the second sheet feeder to start feeding the inner sheet before completion of the sheet separating operation on the two-ply sheet.Type: GrantFiled: March 8, 2022Date of Patent: May 7, 2024Assignee: RICOH COMPANY, LTD.Inventors: Joji Akiyama, Tomohiro Furuhashi, Wataru Takahashi, Sho Asano, Yoshito Suzuki, Shinya Monma, Yohsuke Haraguchi, Wataru Nozaki
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Patent number: 11947287Abstract: A sheet separation device separates a non-bonding portion of a two-ply sheet in which two sheets are overlapped and bonded together at one end of the two-ply sheet. The sheet separation device includes a separator that includes a first separator and a second separator. The first separator is inserted into a gap between the two sheets of the two-ply sheet. The second separator is inserted between the two sheets at said another end of the two-ply sheet that is opposite to the one end of the two-ply sheet and moves in a width direction of the two-ply sheet after the first separator is inserted into the gap and relatively moves from the one end to said another end.Type: GrantFiled: October 12, 2022Date of Patent: April 2, 2024Assignee: RICOH COMPANY, LTD.Inventors: Wataru Takahashi, Tomohiro Furuhashi, Shinya Monma, Yoshito Suzuki, Joji Akiyama, Yohsuke Haraguchi, Sho Asano, Wataru Nozaki
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Publication number: 20180373198Abstract: A process cartridge includes an image bearer to bear a toner image, a lubricant supply device to supply a lubricant to the surface of the image bearer, and a blade made of elastic material, with the leading end abutting the surface of the image bearer, wherein the leading end is formed to have an elasticity power of from 65 to 93 percent, wherein the process cartridge is detachably attachable to an image forming apparatus.Type: ApplicationFiled: June 26, 2018Publication date: December 27, 2018Inventors: Hiroshi Mizusawa, Hiroshi Nakai, Hisashi Kikuchi, Kazuhiko Watanabe, Sho Akiyama, Tomoyuki Kirigane, Kenji Komito
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Patent number: 9753426Abstract: An image bearer protective agent is provided. The image bearer protective agent includes a fatty acid metal salt and an inorganic lubricant. The inorganic lubricant includes a first inorganic lubricant having a tap density of from 0.30 to 0.8 g/cm2.Type: GrantFiled: September 20, 2016Date of Patent: September 5, 2017Assignee: Ricoh Company, Ltd.Inventors: Kenji Komito, Hiroshi Nakai, Kohsuke Yamamoto, Hiroshi Mizusawa, Sho Akiyama
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Publication number: 20170090399Abstract: An image bearer protective agent is provided. The image bearer protective agent includes a fatty acid metal salt and an inorganic lubricant. The inorganic lubricant includes a first inorganic lubricant having a tap density of from 0.30 to 0.8 g/cm2.Type: ApplicationFiled: September 20, 2016Publication date: March 30, 2017Inventors: Kenji KOMITO, Hiroshi NAKAI, Kohsuke YAMAMOTO, Hiroshi MIZUSAWA, Sho AKIYAMA
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Patent number: 9316950Abstract: A development device is operable in multiple different speed modes and includes a developer bearer to carry developer, a developer regulator to adjust an amount of developer carried on the developer bearer, and multiple developer conveyance members disposed facing the developer bearer to transport developer in a longitudinal direction to circulate developer inside the development device. The multiple developer conveyance members including a first developer conveyance member to supply developer to the developer bearer and a second developer conveyance member to transport developer collected from the developer bearer. The development device executes developer amount balance adjustment in which a driving velocity of at least the multiple developer conveyance members is increased from a driving velocity in a lower-speed mode for a predetermined period after image development in the lower speed mode is completed and before image development in a higher speed mode is started.Type: GrantFiled: April 4, 2013Date of Patent: April 19, 2016Assignee: Ricoh Company, Ltd.Inventors: Tomoko Takahashi, Yoshiyuki Fukuda, Yoshio Hattori, Sho Akiyama, Takamasa Ozeki, Yoshinori Nakagawa, Mikio Ishibashi, Ryuji Yoshida, Taichi Urayama
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Patent number: 9310715Abstract: A developing device includes a developer bearer, a development casing in which a developer conveyance channel is formed facing the developer bearer through a communicating area, a developer supply member disposed in the developer conveyance channel, a developer regulator disposed facing a lower portion of the developer bearer to adjust an amount of developer carried on the developer bearer, and a sheet member that is removably installed to seal the communicating area and passes through a gap between the developer regulator and the developer bearer and an opening formed in the development casing. A first end of the sheet member is retained downstream from the gap in a direction of rotation of the developer bearer, and the sheet member is fixed to the development casing at a position across the communicating area from the first end with a second end positioned outside the development casing.Type: GrantFiled: December 13, 2013Date of Patent: April 12, 2016Assignee: Ricoh Company, Ltd.Inventors: Yoshio Hattori, Yoshiyuki Fukuda, Sho Akiyama, Yuki Oshikawa, Noriyuki Kimura
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Publication number: 20160041494Abstract: A development device is operable in multiple different speed modes and includes a developer bearer to carry developer, a developer regulator to adjust an amount of developer carried on the developer bearer, and multiple developer conveyance members disposed facing the developer bearer to transport developer in a longitudinal direction to circulate developer inside the development device. The multiple developer conveyance members including a first developer conveyance member to supply developer to the developer bearer and a second developer conveyance member to transport developer collected from the developer bearer. The development device executes developer amount balance adjustment in which a driving velocity of at least the multiple developer conveyance members is increased from a driving velocity in a lower-speed mode for a predetermined period after image development in the lower speed mode is completed and before image development in a higher speed mode is started.Type: ApplicationFiled: April 4, 2013Publication date: February 11, 2016Applicant: RICOH COMPANY, LTD.Inventors: Tomoko TAKAHASHI, Yoshiyuki FUKUDA, Yoshio HATTORI, Sho AKIYAMA, Takamasa OZEKI, Yoshinori NAKAGAWA, Mikio ISHIBASHI, Ryuji YOSHIDA, Taichi URAYAMA
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Patent number: 9141034Abstract: A developing device includes a developer bearer, a magnetic field generator provided inside the developer bearer, a casing including an opening to partly expose a surface of the developer bearer, and a lateral end cover to cover an axial end portion of the exposed surface of the developer bearer. The lateral end cover includes a wide portion extending more to an axial inner side of the developer bearer than a downstream portion of the lateral end cover positioned downstream from the wide portion in a direction of rotation of the developer bearer. A downstream end of the wide portion is downstream from an upstream end of the development range in the direction of rotation of the developer bearer.Type: GrantFiled: May 29, 2014Date of Patent: September 22, 2015Assignee: Ricoh Company, Ltd.Inventors: Yoshiyuki Fukuda, Yoshio Hattori, Sho Akiyama, Noriyuki Kimura
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Publication number: 20140356030Abstract: A developing device includes a developer bearer, a magnetic field generator provided inside the developer bearer, a casing including an opening to partly expose a surface of the developer bearer, and a lateral end cover to cover an axial end portion of the exposed surface of the developer bearer. The lateral end cover includes a wide portion extending more to an axial inner side of the developer bearer than a downstream portion of the lateral end cover positioned downstream from the wide portion in a direction of rotation of the developer bearer. A downstream end of the wide portion is downstream from an upstream end of the development range in the direction of rotation of the developer bearer.Type: ApplicationFiled: May 29, 2014Publication date: December 4, 2014Applicant: RICOH COMPANY, LTD.Inventors: Yoshiyuki Fukuda, Yoshio Hattori, Sho Akiyama, Noriyuki Kimura
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Publication number: 20140301747Abstract: A development device is operable in multiple different speed modes and includes a developer bearer to carry developer, a developer regulator to adjust an amount of developer carried on the developer bearer, and multiple developer conveyance members disposed facing the developer bearer to transport developer in a longitudinal direction to circulate developer inside the development device. The multiple developer conveyance members including a first developer conveyance member to supply developer to the developer bearer and a second developer conveyance member to transport developer collected from the developer bearer. The development device executes developer amount balance adjustment in which a driving velocity of at least the multiple developer conveyance members is increased from a driving velocity in a lower-speed mode for a predetermined period after image development in the lower speed mode is completed and before image development in a higher speed mode is started.Type: ApplicationFiled: April 4, 2013Publication date: October 9, 2014Applicant: RICOH COMPANY, LTD.Inventors: Tomoko TAKAHASHI, Yoshiyuki FUKUDA, Yoshio HATTORI, Sho AKIYAMA, Takamasa OZEKI, Yoshinori NAKAGAWA, Mikio ISHIBASHI, Ryuji YOSHIDA, Taichi URAYAMA
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Publication number: 20140169827Abstract: A developing device includes a developer bearer, a development casing in which a developer conveyance channel is formed facing the developer bearer through a communicating area, a developer supply member disposed in the developer conveyance channel, a developer regulator disposed facing a lower portion of the developer bearer to adjust an amount of developer carried on the developer bearer, and a sheet member that is removably installed to seal the communicating area and passes through a gap between the developer regulator and the developer bearer and an opening formed in the development casing. A first end of the sheet member is retained downstream from the gap in a direction of rotation of the developer bearer, and the sheet member is fixed to the development casing at a position across the communicating area from the first end with a second end positioned outside the development casing.Type: ApplicationFiled: December 13, 2013Publication date: June 19, 2014Applicant: RICOH COMPANY, LTD.Inventors: Yoshio Hattori, Yoshiyuki Fukuda, Sho Akiyama, Yuki Oshikawa, Noriyuki Kimura