Patents by Inventor Yuta Azeyanagi

Yuta Azeyanagi 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).

  • Publication number: 20210200124
    Abstract: A snap ring is set to a set portion of a shaft of a rotator from a direction orthogonal to an axial direction of the shaft. The snap ring includes a first arcuate portion and a second arcuate portion facing each other, being elastically deformable in directions away from each other, holding the set portion by elastic deformation restoring force. One ends of the first and second arcuate portions are away from each other to form an insertion portion to insert the set portion. When the snap ring is not used, the first arcuate portion has a same radius of curvature as the second arcuate portion and the set portion, and a center of curvature closer to the second arcuate portion than the first arcuate portion, and the second arcuate portion has a center of curvature closer to the first arcuate portion than the second arcuate portion.
    Type: Application
    Filed: December 16, 2020
    Publication date: July 1, 2021
    Applicant: Ricoh Company, Ltd.
    Inventors: Yohhei WATANABE, Naoto SUZUKI, Yuta AZEYANAGI, Nobuo KUWABARA, Kenji HONJOH, Teppei KAWATA, Haruki NAGATA, Michiharu SUZUKI
  • Patent number: 10018941
    Abstract: A cleaning device includes a cleaning blade disposed in contact with a rotator, a toner collecting section disposed along the rotator and the cleaning blade and includes a groove extending in an axial direction of the rotator, a conveyor disposed in the groove, and an agitator disposed on a side of a rim of the groove. The conveyor rotates to convey the toner in a longitudinal direction of the groove. The agitator vibrates through contact with the conveyor and includes comb-tooth portions lined in a comb shape in the longitudinal direction of the groove, and bent portions, each of which is bent from an end of one of the comb-tooth portions. The comb-tooth portions contact a circumference of the conveyor to vibrate. The bent portions are lined at intervals smaller than intervals on a base side of the comb-tooth portions.
    Type: Grant
    Filed: March 16, 2017
    Date of Patent: July 10, 2018
    Assignee: Ricoh Company, Ltd.
    Inventors: Daisuke Tomita, Takeshi Shintani, Hiroshi Mizusawa, Yasuhiro Maehata, Yasuhito Kuboshima, Yuta Azeyanagi
  • Patent number: 9983512
    Abstract: A toner conveyance device includes a downward passage, a reciprocating member disposed in the downward passage, to move in a vertical direction in which the downward passage extends, a conveyance passage communicating with a lower end of the downward passage and extending in a direction crossing the vertical direction, a conveyor to rotate in the conveyance passage around an axis extending along the conveyance passage to transport the toner, and a flexible member projecting from a bottom of the reciprocating member toward the conveyance passage. The flexible member extends in the axial direction of the conveyor and moves together with the reciprocating member. When the reciprocating member is at a lowest position, a lower end of the flexible member opposes a portion of the conveyor downstream from an upper end thereof in a rotation direction thereof.
    Type: Grant
    Filed: February 10, 2017
    Date of Patent: May 29, 2018
    Assignee: RICOH COMPANY, LTD.
    Inventors: Yusuke Ishizuka, Takeshi Shintani, Yasuhiro Maehata, Hiroshi Mizusawa, Daisuke Tomita, Yuta Azeyanagi, Yasuhito Kuboshima
  • Publication number: 20170269511
    Abstract: A cleaning device includes a cleaning blade disposed in contact with a rotator, a toner collecting section disposed along the rotator and the cleaning blade and includes a groove extending in an axial direction of the rotator, a conveyor disposed in the groove, and an agitator disposed on a side of a rim of the groove. The conveyor rotates to convey the toner in a longitudinal direction of the groove. The agitator vibrates through contact with the conveyor and includes comb-tooth portions lined in a comb shape in the longitudinal direction of the groove, and bent portions, each of which is bent from an end of one of the comb-tooth portions. The comb-tooth portions contact a circumference of the conveyor to vibrate. The bent portions are lined at intervals smaller than intervals on a base side of the comb-tooth portions.
    Type: Application
    Filed: March 16, 2017
    Publication date: September 21, 2017
    Inventors: Daisuke TOMITA, Takeshi Shintani, Hiroshi Mizusawa, Yasuhiro Maehata, Yasuhito Kuboshima, Yuta Azeyanagi
  • Publication number: 20170261887
    Abstract: A toner conveyance device includes a downward passage, a reciprocating member disposed in the downward passage, to move in a vertical direction in which the downward passage extends, a conveyance passage communicating with a lower end of the downward passage and extending in a direction crossing the vertical direction, a conveyor to rotate in the conveyance passage around an axis extending along the conveyance passage to transport the toner, and a flexible member projecting from a bottom of the reciprocating member toward the conveyance passage. The flexible member extends in the axial direction of the conveyor and moves together with the reciprocating member. When the reciprocating member is at a lowest position, a lower end of the flexible member opposes a portion of the conveyor downstream from an upper end thereof in a rotation direction thereof.
    Type: Application
    Filed: February 10, 2017
    Publication date: September 14, 2017
    Applicant: Ricoh Company, Ltd.
    Inventors: Yusuke ISHIZUKA, Takeshi Shintani, Yasuhiro Maehata, Hiroshi Mizusawa, Daisuke Tomita, Yuta Azeyanagi, Yasuhito Kuboshima
  • Patent number: 9500996
    Abstract: A sealing member is attached to a second member attached to and detached from a first member having a first opening through which powder passes and having a second opening that communicates with the first opening when the second member is coupled to the first member, and prevents the powder from leaking from a coupling portion between the first opening and the second opening. The sealing member includes: a first elastic member with a first surface arranged on the second member; and a second elastic member arranged on at least a part of a periphery of the first elastic member and having hardness different from that of the first elastic member.
    Type: Grant
    Filed: May 8, 2015
    Date of Patent: November 22, 2016
    Assignee: RICOH COMPANY, LIMITED
    Inventors: Yuta Azeyanagi, Takeshi Kojima, Hajime Teraji, Hiromichi Ninomiya, Michiya Okamoto, Shinya Karasawa, Kentaroh Nodera, Daisuke Sawada
  • Patent number: 9256190
    Abstract: A lubricant supplying device includes: lubricant; a supplying member that supplies the lubricant to a lubricant supply target; and a remaining amount detecting unit that detects that a remaining amount of the lubricant is equal to or smaller than a certain amount. The remaining amount detecting unit includes a first electrode member and a second electrode member. The lubricant supplying device includes a member that causes at least a part of the second electrode member to move and causes the second electrode member to abut the first electrode member with an increase in consumption of the lubricant.
    Type: Grant
    Filed: May 19, 2015
    Date of Patent: February 9, 2016
    Assignee: RICOH COMPANY, LIMITED
    Inventors: Satoshi Hatori, Ryohta Gotoh, Akira Fujimori, Naohiro Kumagai, Kaoru Yoshino, Hideyasu Seki, Nobuyuki Taguchi, Hiromichi Ninomiya, Yuta Azeyanagi, Yasuhito Kuboshima
  • Patent number: 9207625
    Abstract: A lubricant supply device includes a solid lubricant, a lubricant holder to hold the solid lubricant, a lubricant supply member to supply lubricant to a lubrication target, a pressing member to press the solid lubricant toward the lubricant supply member, and a pressing force adjuster to change an amount of pressing force exerted by the pressing member.
    Type: Grant
    Filed: February 27, 2014
    Date of Patent: December 8, 2015
    Assignee: RICOH COMPANY, LTD.
    Inventors: Ryohta Gotoh, Kaoru Yoshino, Satoshi Hatori, Hiromichi Ninomiya, Nobuyuki Taguchi, Yasuhito Kuboshima, Naohiro Kumagai, Shinichi Kawahara, Nobuo Kuwabara, Hideyasu Seki, Yuta Azeyanagi
  • Publication number: 20150331362
    Abstract: A sealing member is attached to a second member attached to and detached from a first member having a first opening through which powder passes and having a second opening that communicates with the first opening when the second member is coupled to the first member, and prevents the powder from leaking from a coupling portion between the first opening and the second opening. The sealing member includes: a first elastic member with a first surface arranged on the second member; and a second elastic member arranged on at least a part of a periphery of the first elastic member and having hardness different from that of the first elastic member.
    Type: Application
    Filed: May 8, 2015
    Publication date: November 19, 2015
    Applicant: Ricoh Company, Limited
    Inventors: Yuta AZEYANAGI, Takeshi KOJIMA, Hajime TERAJI, Hiromichi NINOMIYA, Michiya OKAMOTO, Shinya KARASAWA, Kentaroh NODERA, Daisuke SAWADA
  • Publication number: 20150268619
    Abstract: A lubricant supplying device includes: lubricant; a supplying member that supplies the lubricant to a lubricant supply target; and a remaining amount detecting unit that detects that a remaining amount of the lubricant is equal to or smaller than a certain amount. The remaining amount detecting unit includes a first electrode member and a second electrode member. The lubricant supplying device includes a member that causes at least a part of the second electrode member to move and causes the second electrode member to abut the first electrode member with an increase in consumption of the lubricant.
    Type: Application
    Filed: May 19, 2015
    Publication date: September 24, 2015
    Inventors: Satoshi HATORI, Ryohta GOTOH, Akira FUJIMORI, Naohiro KUMAGAI, Kaoru YOSHINO, Hideyasu SEKI, Noboyuki TAGUCHI, Hiromichi NINOMIYA, Yuta AZEYANAGI, Yasuhito KUBOSHIMA
  • Patent number: 9104171
    Abstract: A detachable device, which can be included in an image forming apparatus, includes a unit drive mechanism, and a cover disposed at one end and an opposite end in the given attachment/detachment direction to cover the unit drive mechanism thereof. The cover includes a first cover and a second cover. The first cover includes at least one first inlet port to intake air from the apparatus body and guide the air to the detachable unit. The second cover includes a second inlet port to intake the air guided into the detachable unit and an air outlet port to exhaust the air introduced from the second inlet port to the apparatus body.
    Type: Grant
    Filed: January 8, 2014
    Date of Patent: August 11, 2015
    Assignee: Ricoh Company, Ltd.
    Inventors: Yuta Azeyanagi, Hiromichi Ninomiya, Satoshi Hatori, Naohiro Kumagai, Nobuyuki Taguchi, Kaoru Yoshino, Yasuhito Kuboshima, Hideyasu Seki, Ryohta Gotoh
  • Patent number: 9081347
    Abstract: In an embodiment, provided is a lubricant supplying device that includes: a solid lubricant; a supplying member that supplies lubricant of the solid lubricant to a lubricant supplying target; and a remaining amount detecting unit that detects an amount of the solid lubricant being at a given amount or less. The remaining amount detecting unit is provided on a downstream side in a rubbing direction of the supplying member with respect to the solid lubricant.
    Type: Grant
    Filed: March 14, 2013
    Date of Patent: July 14, 2015
    Assignee: RICOH COMPANY, LIMITED
    Inventors: Akira Fujimori, Satoshi Hatori, Naohiro Kumagai, Kaoru Yoshino, Hideyasu Seki, Ryohta Gotoh, Takeshi Shintani, Nobuyuki Taguchi, Hiromichi Ninomiya, Norio Kudo, Kenji Honjoh, Yuta Azeyanagi
  • Patent number: 9068693
    Abstract: A lubricant supplying device includes: lubricant; a supplying member that supplies the lubricant to a lubricant supply target; and a remaining amount detecting unit that detects that a remaining amount of the lubricant is equal to or smaller than a certain amount. The remaining amount detecting unit includes a first electrode member and a second electrode member. The lubricant supplying device includes a member that causes at least a part of the second electrode member to move and causes the second electrode member to abut the first electrode member with an increase in consumption of the lubricant.
    Type: Grant
    Filed: March 8, 2013
    Date of Patent: June 30, 2015
    Assignee: RICOH COMPANY, LIMITED
    Inventors: Satoshi Hatori, Ryohta Gotoh, Akira Fujimori, Naohiro Kumagai, Kaoru Yoshino, Hideyasu Seki, Nobuyuki Taguchi, Hiromichi Ninomiya, Yuta Azeyanagi, Yasuhito Kuboshima
  • Patent number: 9052669
    Abstract: A lubricant applicator includes a block of lubricant, a supply member contactable against the block of lubricant to scrape the block of lubricant, and a lubricant gauge including a first electrode and a second electrode. The lubricant gauge is electrically connected to the first electrode and the second electrode to detect whether an amount of lubricant remaining is less than a threshold value based on establishment of electrical continuity between the first electrode and the second electrode. One of the first electrode and the second electrode includes a projection projecting toward the other one of the first electrode and the second electrode.
    Type: Grant
    Filed: July 8, 2013
    Date of Patent: June 9, 2015
    Assignee: Ricoh Company, Ltd.
    Inventors: Daisuke Tomita, Takeshi Shintani, Norio Kudo, Kenji Honjoh, Satoshi Hatori, Naohiro Kumagai, Akira Fujimori, Kaoru Yoshino, Yuta Azeyanagi, Hideyasu Seki, Ryohta Gotoh
  • Patent number: 9008546
    Abstract: An image carrier includes a tubular image carrier body to carry an image on an outer circumferential surface thereof, a shaft disposed inside the image carrier body, a first flange mounted on the shaft, and a second flange spaced apart from the first flange in an axial direction of the image carrier and mounted on the shaft. Each of the first flange and the second flange includes a through-hole contacting the shaft, a first engagement portion to engage a lateral end of the image carrier body in the axial direction of the image carrier, and a second engagement portion, constituting at least a part of the through-hole, to engage the shaft. The second engagement portion is disposed inboard from the first engagement portion in the axial direction of the image carrier.
    Type: Grant
    Filed: November 7, 2013
    Date of Patent: April 14, 2015
    Assignee: Ricoh Company, Ltd.
    Inventors: Nobuyuki Taguchi, Satoshi Hatori, Naohiro Kumagai, Kaoru Yoshino, Hiromichi Ninomiya, Yuta Azeyanagi, Yasuhito Kuboshima, Hideyasu Seki, Ryohta Gotoh
  • Patent number: 8958737
    Abstract: A lubricant supplying device includes a compressing spring that has one end coming into contact with a holding member in order to bias a solid lubricant toward a lubricant supplying roller and a casing that covers the outside of the device. Then, the casing includes an opening portion that allows the other end of the compressing spring, having the one end coming into contact with the holding member, to be exposed therethrough, and the casing further includes a cover member that is installed in the opening portion in a removable manner so that the cover member comes into contact with the other end of the compressing spring.
    Type: Grant
    Filed: January 12, 2012
    Date of Patent: February 17, 2015
    Assignee: Ricoh Company, Limited
    Inventors: Shinya Karasawa, Ken Amemiya, Michiya Okamoto, Takuma Iwasaki, Yuta Azeyanagi
  • Patent number: 8934808
    Abstract: A charging device, which is incorporable in a process cartridge and an image forming apparatus, includes a charging roller and a cleaning device. The charging roller charges an image bearing member having a surface on which an electrostatic latent image is formed. The cleaning device cleans the charging roller. The cleaning device includes a cleaning roller, a shaft, and support members. The cleaning roller contacts the surface of the charging roller to clean the surface. The support members rotatably support the cleaning roller, each of which including a slot. The slot allows a variable distance between the charging roller and the cleaning roller, and is inclined, in the direction of rotation of the charging roller, relative to a straight line connecting the rotation center of the charging roller and the rotation center of the cleaning roller.
    Type: Grant
    Filed: October 13, 2011
    Date of Patent: January 13, 2015
    Assignee: Ricoh Company, Ltd.
    Inventors: Ken Amemiya, Michiya Okamoto, Takuma Iwasaki, Shinya Karasawa, Yuta Azeyanagi
  • Patent number: 8855507
    Abstract: In the present invention, a lubricant supplying device includes a lubricant end determining unit that determines that a solid lubricant is in an end state when the amount of a lubricant supplying operation reaches a threshold after a residual amount detecting unit detects that the residual amount of the solid lubricant is equal to or smaller than a predetermined amount. The lubricant end determining unit makes a threshold of the amount of the lubricant supplying operation at temperature or humidity of equal to or lower than a predetermined value lower than a threshold of the amount of the lubricant supplying operation at temperature or humidity of higher than the predetermined value.
    Type: Grant
    Filed: March 21, 2013
    Date of Patent: October 7, 2014
    Assignee: Ricoh Company, Limited
    Inventors: Hideyasu Seki, Satoshi Hatori, Naohiro Kumagai, Kaoru Yoshino, Akira Fujimori, Ryohta Gotoh, Nobuyuki Taguchi, Hiromichi Ninomiya, Yuta Azeyanagi, Yasuhito Kuboshima
  • Publication number: 20140270881
    Abstract: A lubricant supply device includes a solid lubricant, a lubricant holder to hold the solid lubricant, a lubricant supply member to supply lubricant to a lubrication target, a pressing member to press the solid lubricant toward the lubricant supply member, and a pressing force adjuster to change an amount of pressing force exerted by the pressing member.
    Type: Application
    Filed: February 27, 2014
    Publication date: September 18, 2014
    Applicant: RICOH COMPANY, LTD.
    Inventors: Ryohta GOTOH, Kaoru YOSHINO, Satoshi HATORI, Hiromichi NINOMIYA, Nobuyuki TAGUCHI, Yasuhito KUBOSHIMA, Naohiro KUMAGAI, Shinichi KAWAHARA, Nobuo KUWABARA, Hideyasu SEKI, Yuta AZEYANAGI
  • Publication number: 20140199091
    Abstract: A detachable device, which can be included in an image forming apparatus, includes a unit drive mechanism, and a cover disposed at one end and an opposite end in the given attachment/detachment direction to cover the unit drive mechanism thereof. The cover includes a first cover and a second cover. The first cover includes at least one first inlet port to intake air from the apparatus body and guide the air to the detachable unit. The second cover includes a second inlet port to intake the air guided into the detachable unit and an air outlet port to exhaust the air introduced from the second inlet port to the apparatus body.
    Type: Application
    Filed: January 8, 2014
    Publication date: July 17, 2014
    Inventors: Yuta AZEYANAGI, Hiromichi Ninomiya, Satoshi Hatori, Naohiro Kumagai, Nobuyuki Taguchi, Kaoru Yoshino, Yasuhito Kuboshima, Hideyasu Seki, Ryohta Gotoh