Patents by Inventor Akio Kosuge

Akio Kosuge 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: 20210041800
    Abstract: An image forming apparatus includes a photoconductor, a charger, a charge remover, and control circuitry. The charger is configured to charge the photoconductor. The charge remover is configured to remove charge from a surface of the photoconductor by light and electric discharge. The control circuitry is configured to: estimate a surface potential that the photoconductor has after the photoconductor is charged by the charger, based on a characteristic value of the photoconductor and a value of a current flowing through the charger after the charge remover removes charge from the photoconductor; and control a charging bias applied to the charger, based on the surface potential estimated.
    Type: Application
    Filed: August 6, 2020
    Publication date: February 11, 2021
    Inventors: Akio KOSUGE, Yuji SUZUKI, Daisuke TAKAHASHI, Shinichi AKATSU, Daisuke ITO
  • Patent number: 9857745
    Abstract: An image forming apparatus includes a rotatable image bearer, a toner image forming device, an image reader, and a control unit. The toner image forming device forms a test toner image on the image bearer. The image reader reads the test toner image and a predetermined reference member. The control unit calculates an amount of toner contained in the test toner image based on image data from the test toner image. Based on image data from the reference member, the control unit selects a position of a pixel to be used for calculation of the amount of toner contained in the test toner image from pixels included in the image data from the reference member, to calculate the amount of toner contained in the test toner image from data of a pixel located at the position thus selected among pixels included in the image data from the test toner image.
    Type: Grant
    Filed: September 23, 2016
    Date of Patent: January 2, 2018
    Assignee: Ricoh Company, Ltd.
    Inventors: Natsumi Matsue, Akira Yoshida, Akio Kosuge, Yoichi Sakurai, Yuuichiroh Uematsu, Keiko Matsumoto
  • Publication number: 20170248889
    Abstract: An image density detector for detecting image density of an image borne by an image bearer includes a reference board, a light emitter, a light receiver, an image density calculator, and an image density detecting condition corrector. The reference board has a spectral reflectance distribution closer to a spectral reflectance distribution of the image forming material than a spectral reflectance distribution of white. The light emitter emits light to the reference board and the image borne by the image bearer. The light receiver receives the light reflected from the image and the reference board. The image density calculator calculates the image density of the image based on an output of the light receiver receiving the light reflected from the image. The image density detecting condition corrector corrects an image density detecting condition based on an output of the light receiver receiving the light reflected from the reference board.
    Type: Application
    Filed: February 17, 2017
    Publication date: August 31, 2017
    Applicant: Ricoh Company, Ltd.
    Inventors: Yuuichiroh Uematsu, Natsumi Matsue, Akira Yoshida, Akio Kosuge, Keiko Matsumoto
  • Patent number: 9651910
    Abstract: An image forming apparatus includes an image bearer, an image forming device to form a toner image on the image bearer, a transfer device to transfer the toner image to a recording medium, a line sensor as an image density sensor to detect image density of the toner image, and a controller operatively connected to the image density sensor. The image density sensor is disposed so as to be shorter in a rotational direction of the image bearer than in a width direction of the image bearer perpendicular to the rotational direction of the image bearer. The controller forms a shading pattern image including a plurality of patches on the image bearer, and detects image density of the plurality of patches, so as to control image density. The shading pattern image is shorter in the rotational direction of the image bearer than in the width direction of the image bearer.
    Type: Grant
    Filed: June 23, 2016
    Date of Patent: May 16, 2017
    Assignee: Ricoh Company, Ltd.
    Inventors: Akio Kosuge, Natsumi Matsue, Keiko Matsumoto, Akira Yoshida, Yoichi Sakurai, Yuuichiroh Uematsu, Kohta Fujimori, Kayoko Tanaka
  • Publication number: 20170108808
    Abstract: An image forming apparatus includes a rotatable image bearer, a toner image forming device, an image reader, and a control unit. The toner image forming device forms a test toner image on the image bearer. The image reader reads the test toner image and a predetermined reference member. The control unit calculates an amount of toner contained in the test toner image based on image data from the test toner image. Based on image data from the reference member, the control unit selects a position of a pixel to be used for calculation of the amount of toner contained in the test toner image from pixels included in the image data from the reference member, to calculate the amount of toner contained in the test toner image from data of a pixel located at the position thus selected among pixels included in the image data from the test toner image.
    Type: Application
    Filed: September 23, 2016
    Publication date: April 20, 2017
    Inventors: Natsumi MATSUE, Akira YOSHIDA, Akio KOSUGE, Yoichi SAKURAI, Yuuichiroh UEMATSU, Keiko MATSUMOTO
  • Publication number: 20160378040
    Abstract: An image forming apparatus includes an image bearer, an image forming device to form a toner image on the image bearer, a transfer device to transfer the toner image to a recording medium, a line sensor as an image density sensor to detect image density of the toner image, and a controller operatively connected to the image density sensor. The image density sensor is disposed so as to be shorter in a rotational direction of the image bearer than in a width direction of the image bearer perpendicular to the rotational direction of the image bearer. The controller forms a shading pattern image including a plurality of patches on the image bearer, and detects image density of the plurality of patches, so as to control image density. The shading pattern image is shorter in the rotational direction of the image bearer than in the width direction of the image bearer.
    Type: Application
    Filed: June 23, 2016
    Publication date: December 29, 2016
    Inventors: Akio KOSUGE, Natsumi MATSUE, Keiko MATSUMOTO, Akira YOSHIDA, Yoichi SAKURAI, Yuuichiroh UEMATSU, Kohta FUJIMORI, Kayoko TANAKA
  • Patent number: 9042778
    Abstract: A powder refilling device includes a refill powder chamber to accommodate a powder bag containing powder, an opener to open the powder bag inside the refill powder chamber, and a squeezer to squeeze the opened powder bag to discharge powder therefrom and reduce a volume of the opened powder bag.
    Type: Grant
    Filed: June 28, 2013
    Date of Patent: May 26, 2015
    Assignee: Ricoh Company, Ltd.
    Inventors: Kazuya Saitoh, Akio Kosuge, Hirokatsu Suzuki, Ryuji Yoshida, Takuya Suganuma, Tetsuto Ueda, Taichi Urayama, Sho Sekiguchi
  • Patent number: 8958719
    Abstract: When the acute angle between a normal line, oriented outward from a blade abutting portion of a photosensitive member over which a cleaning blade remains abutted before separation of the surface of the photosensitive member from the cleaning blade, and a horizontal plane, passing through the origin of the normal line, is expressed as a positive value when the normal line lies above the horizontal plane and expressed as a negative value when the normal line lies below the horizontal plane; an imaging unit frame so supports a photosensitive module that the photosensitive member can rotate to a specific rotational position having a greater angle than the angle at the time of separation of the surface of the photosensitive member from the cleaning blade. Until the photosensitive member rotates from a normal rotational position to the specific rotational position, the photosensitive module cannot be removed from the imaging unit frame.
    Type: Grant
    Filed: January 23, 2012
    Date of Patent: February 17, 2015
    Assignee: Ricoh Company, Limited
    Inventors: Nobuo Kuwabara, Shinichi Kawahara, Akio Kosuge, Daisuke Tomita
  • Patent number: 8913923
    Abstract: An image forming apparatus including an image bearing member, a charger, an irradiator, a developing device, a transfer device, a neutralizer, and a varying device is provided. The neutralizer is adapted to neutralize the image bearing member by emitting neutralization light thereto, after a toner image formed on the image bearing member is transferred therefrom. The varying device is adapted to vary an amount of the neutralization light to be emitted to the image bearing member by pulse-width modulation of a voltage to be supplied to the neutralizer. The image forming apparatus satisfies the following formula: f/V>5 wherein f (Hz) represents a frequency of the pulse-width modulation and V (mm/s) represents a linear speed of the image bearing member.
    Type: Grant
    Filed: June 5, 2012
    Date of Patent: December 16, 2014
    Assignee: Ricoh Company, Ltd.
    Inventors: Akio Kosuge, Shinichi Kawahara, Nobuo Kuwabara, Takeshi Shintani, Norio Kudo, Daisuke Tomita
  • Patent number: 8761654
    Abstract: A cleaning device to remove untransferred toner from a surface of an image carrier rotatable in a predetermined direction. The cleaning device includes a lubricant supply roller contacting the surface of the image carrier to supply a lubricant carried thereon to the surface of the image carrier, a first blade provided upstream from the lubricant supply roller in the direction of rotation of the image carrier, and a second blade provided downstream from the lubricant supply roller. The first blade contacts the surface of the image carrier to level the untransferred toner attaching to the surface of the image carrier to a thin layer. The second blade contacts the surface of the image carrier to level the lubricant supplied to the surface of the image carrier by the lubricant supply roller to a thin layer and to remove the untransferred toner from the surface of the image carrier.
    Type: Grant
    Filed: October 19, 2011
    Date of Patent: June 24, 2014
    Assignee: Ricoh Company, Ltd.
    Inventors: Shinichi Kawahara, Nobuo Kuwabara, Takeshi Shintani, Akio Kosuge, Daisuke Tomita
  • Patent number: 8725009
    Abstract: An image forming apparatus includes an image carrier, a cleaning device that collects a waste toner attached to the surface of the image carrier using a cleaning member, a waste container that is removable from an image forming apparatus body, a temporary storage unit that is provided in the image forming apparatus body to temporarily store a waste including the waste toner collected in the cleaning device before the waste is transported to the waste container, and a waste transport unit that transports the waste to the temporary storage unit, wherein a discharge speed of the waste from the temporary storage unit by the waste discharge unit is lower than a transport speed of the waste to the temporary storage unit by the waste transport unit.
    Type: Grant
    Filed: December 22, 2011
    Date of Patent: May 13, 2014
    Assignee: Ricoh Company, Limited
    Inventors: Daisuke Tomita, Shinichi Kawahara, Takeshi Shintani, Nobuo Kuwabara, Akio Kosuge
  • Patent number: 8718530
    Abstract: A lubricant supply device including a solid lubricant, a lubricant supply roller, a detector, and a varying device is provided. The lubricant supply roller is adapted to supply the lubricant to a toner image bearing member and is rotatable in a predetermined direction while slidably contacting both the solid lubricant and the toner image bearing member. The detector is adapted to detect an absolute humidity around the lubricant supply device. The varying device is adapted to vary an amount of the lubricant to be supplied to the toner image bearing member based on the absolute humidity detected by the detector.
    Type: Grant
    Filed: May 30, 2012
    Date of Patent: May 6, 2014
    Assignee: Ricoh Company, Ltd.
    Inventors: Norio Kudo, Shinichi Kawahara, Nobuo Kuwabara, Takeshi Shintani, Akio Kosuge, Daisuke Tomita
  • Patent number: 8712261
    Abstract: A lubricant supplying device includes a lubricant supplying roller configured to rotate in a certain direction and makes a sliding contact with an image carrier on which a toner image is carried; a solid lubricant arranged to slide in contact with the lubricant supplying roller; a changing unit configured to change a revolution of the lubricant supplying roller to adjust an amount of the solid lubricant supplied onto the image carrier; and a calculation unit configured to obtain a product life or total consumption of the solid lubricant from a total running distance or total operating time of the image carrier or the lubricant supplying roller, the product life or the total consumption of the solid lubricant being corrected based on the amount of the solid lubricant supplied onto the image carrier.
    Type: Grant
    Filed: June 15, 2012
    Date of Patent: April 29, 2014
    Assignee: Ricoh Company, Limited
    Inventors: Norio Kudo, Shinichi Kawahara, Nobuo Kuwabara, Takeshi Shintani, Akio Kosuge, Daisuke Tomita, Makoto Yasuda
  • Publication number: 20140027012
    Abstract: A powder refilling device includes a refill powder chamber to accommodate a powder bag containing powder, an opener to open the powder bag inside the refill powder chamber, and a squeezer to squeeze the opened powder bag to discharge powder therefrom and reduce a volume of the opened powder bag.
    Type: Application
    Filed: June 28, 2013
    Publication date: January 30, 2014
    Applicant: Ricoh Company, Ltd.
    Inventors: Kazuya SAITOH, Akio KOSUGE, Hirokatsu SUZUKI, Ryuji YOSHIDA, Takuya SUGANUMA, Tetsuto UEDA, Taichi URAYAMA, Sho SEKIGUCHI
  • Patent number: 8457541
    Abstract: An image forming apparatus includes an image carrier, a charging device to charge a surface of the image carrier, disposed across a predetermined gap from the image carrier, a latent image forming device, a developing device to develop a latent image formed on the image carrier into a toner image, a transfer unit to transfer the toner image from the image carrier onto a recording medium, a cleaning member to clean the image carrier after the toner image is transferred therefrom, a lubricant application member to lubricate the image carrier, a polarity adjustor to adjust polarities of the toner and lubricant adhering to the image carrier to be identical to a polarity of a charging bias. The polarity adjustor is disposed facing the image carrier, upstream from the charging device and downstream from the transfer unit in a direction in which the image carrier rotates.
    Type: Grant
    Filed: November 9, 2009
    Date of Patent: June 4, 2013
    Assignee: Ricoh Company, Limited
    Inventors: Akio Kosuge, Shinichi Kawahara, Nobuo Kuwabara, Satoshi Hatori, Yoshinori Ozawa, Daisuke Tomita, Takeshi Shintani
  • Patent number: 8428475
    Abstract: A waste toner container that collects waste toner that is not used to form an image in an image forming unit of an image forming apparatus, and includes a waste toner collection opening to receive the waste toner output from the image forming unit, a toner amount detector to detect toner amount in the waste toner container, and a waste toner conveyance member disposed inside the waste toner container to convey the waste toner in the waste toner container. The waste toner conveyance member defines a waste toner conveyance direction exchange point, which is a boundary between two different toner conveyance direction regions in which the waste toner is conveyed in opposite directions, and the waste toner conveyance direction exchange point is disposed closer to the toner amount detector than is the waste toner collection opening.
    Type: Grant
    Filed: October 14, 2010
    Date of Patent: April 23, 2013
    Assignee: Ricoh Company, Ltd
    Inventors: Daisuke Tomita, Shinichi Kawahara, Takeshi Shintani, Nobuo Kuwabara, Akio Kosuge
  • Patent number: 8380115
    Abstract: A lubricant applicator rotatable at multiple different linear velocities, including a rotatable lubricant applying member to scrape a lubricant and to apply the lubricant to a surface of an image carrier rotatable at multiple different linear velocities. Any given linear velocity of the lubricant applying member satisfies a relation of n1/N1>n2/N2> . . . nx/Nx, where N1, N2, . . . Nx (N1<N2< . . . Nx) are the multiple different linear velocities of the image carrier, and n1, n2, . . . nx are multiple linear velocities of the lubricant applying member corresponding to the multiple linear velocities of the image carrier.
    Type: Grant
    Filed: January 7, 2010
    Date of Patent: February 19, 2013
    Assignee: Ricoh Company, Limited
    Inventors: Takeshi Shintani, Daisuke Tomita, Satoshi Hatori, Nobuo Kuwabara, Akio Kosuge, Shinichi Kawahara, Yoshinori Ozawa
  • Publication number: 20120328332
    Abstract: An image forming apparatus including an image bearing member, a charger, an irradiator, a developing device, a transfer device, a neutralizer, and a varying device is provided. The neutralizer is adapted to neutralize the image bearing member by emitting neutralization light thereto, after a toner image formed on the image bearing member is transferred therefrom. The varying device is adapted to vary an amount of the neutralization light to be emitted to the image bearing member by pulse-width modulation of a voltage to be supplied to the neutralizer. The image forming apparatus satisfies the following formula: f/V>5 wherein f (Hz) represents a frequency of the pulse-width modulation and V (mm/s) represents a linear speed of the image bearing member.
    Type: Application
    Filed: June 5, 2012
    Publication date: December 27, 2012
    Inventors: Akio KOSUGE, Shinichi Kawahara, Nobuo Kuwabara, Takeshi Shintani, Norio Kudo, Daisuke Tomita
  • Publication number: 20120321330
    Abstract: A lubricant supplying device includes a lubricant supplying roller configured to rotate in a certain direction and makes a sliding contact with an image carrier on which a toner image is carried; a solid lubricant arranged to slide in contact with the lubricant supplying roller; a changing unit configured to change a revolution of the lubricant supplying roller to adjust an amount of the solid lubricant supplied onto the image carrier; and a calculation unit configured to obtain a product life or total consumption of the solid lubricant from a total running distance or total operating time of the image carrier or the lubricant supplying roller, the product life or the total consumption of the solid lubricant being corrected based on the amount of the solid lubricant supplied onto the image carrier.
    Type: Application
    Filed: June 15, 2012
    Publication date: December 20, 2012
    Inventors: Norio KUDO, Shinichi Kawahara, Nobuo Kuwabara, Takeshi Shintani, Akio Kosuge, Daisuke Tomita, Makoto Yasuda
  • Publication number: 20120315053
    Abstract: A lubricant supply device including a solid lubricant, a lubricant supply roller, a detector, and a varying device is provided. The lubricant supply roller is adapted to supply the lubricant to a toner image bearing member and is rotatable in a predetermined direction while slidably contacting both the solid lubricant and the toner image bearing member. The detector is adapted to detect an absolute humidity around the lubricant supply device. The varying device is adapted to vary an amount of the lubricant to be supplied to the toner image bearing member based on the absolute humidity detected by the detector.
    Type: Application
    Filed: May 30, 2012
    Publication date: December 13, 2012
    Applicant: RICOH COMPANY, LTD.
    Inventors: Norio Kudo, Shinichi Kawahara, Nobuo Kuwabara, Takeshi Shintani, Akio Kosuge, Daisuke Tomita