Patents by Inventor Yusuke Ishida
Yusuke Ishida 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: 9134646Abstract: An image forming apparatus includes an image bearing member, a development device that includes a developer bearing member in a development position opposite to the image bearing member to develop an electrostatic latent image formed on the image bearing member, and a bias applying portion that applies a development bias to the developer bearing member. A degradation sensing portion senses information related to a level of degradation of toner stored in the development device, and an acquisition portion acquires information on a type of a recording material to which a toner image developed by the development device is transferred.Type: GrantFiled: August 10, 2012Date of Patent: September 15, 2015Assignee: CANON KABUSHIKI KAISHAInventor: Yusuke Ishida
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Publication number: 20150253689Abstract: A developing unit includes a developing container, a developing sleeve, a developer regulating member, and a magnetic field generating portion. The magnetic field generating portion includes a drawing-up pole and a cut pole. In addition, in a peak-to-peak area, the magnetic field generating portion includes at least one of an Fr flat area in which Fr is substantially constant and an Fr attenuation area in which Fr attenuates toward the cut pole side from the drawing-up pole side, and is configured that F? is oriented toward the same direction as a direction of rotation of the developing sleeve in the entire peak-to-peak area.Type: ApplicationFiled: February 26, 2015Publication date: September 10, 2015Inventors: Yusuke Ishida, Katsuya Nose, Kousuke Takeuchi, Toshihisa Yago, Fumiyoshi Saito, Naoki Mugita
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Publication number: 20150253690Abstract: A developing device includes a developing sleeve having a plurality of grooves, and a magnetic field generating portion configured to be disposed on an inner side of the developing sleeve and including at least a drawing-up pole and a cut pole. The magnetic field generating portion is configured to form. a Fr attenuation area and a F? reverse area between a peak of a magnetic flux density of the drawing-up pole and a peak of a magnetic flux density of the cut pole. Fr attenuates toward the cut pole side from the drawing-up pole side in the Fr attenuation area and F? is oriented towards an opposite direction to a direction of rotation of the developing sleeve in the F? reverse area. A pitch interval of the plurality of grooves is shorter than a length of the F? reverse area in the direction of rotation of the developing sleeve.Type: ApplicationFiled: February 26, 2015Publication date: September 10, 2015Inventor: Yusuke Ishida
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Patent number: 9072507Abstract: A suction puncture device includes a puncture needle having an outer tube that has an opening edge of a first front end formed in the shape of a blade, and a stopper member that has a second front end disposed within the outer tube at a position separated from the first front end of the outer tube by a predetermined distance. A sample containing portion is formed between the second front end of the stopper member and the first front end of the outer tube. A ventilation passage is formed around the stopper member within the outer tube, a suction unit is connected to a first base end side of the outer tube, and the suction unit is communicated with and connected to the sample containing portion via the ventilation passage.Type: GrantFiled: September 14, 2012Date of Patent: July 7, 2015Assignees: Kurume University, OLYMPUS MEDICAL SYSTEMS CORP.Inventors: Yoshinobu Okabe, Ryohei Kaji, Yusuke Ishida, Makiko Yasumoto, Tomohiko Yamaguchi, Tomoki Tahira, Tomohiko Mamiya, Kenji Shibaki
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Publication number: 20150168868Abstract: An image forming apparatus includes an image forming unit including a containing unit that contains a developer including toner and forms an image based on image data by using the toner, a supply unit that supplies the toner into the containing unit, a consumption amount calculation unit that calculates, based on information related to a density of an image corresponding to the image data, a consumption amount in the containing unit, a detection unit that detects a toner density of the developer in the containing unit, a correction amount calculation unit that calculates, based on the information and the toner density detected by the detection unit, a correction amount by which the consumption amount is corrected, and a controller that controls the supply unit based on the consumption amount and the correction amount calculated by the correction amount calculation unit.Type: ApplicationFiled: December 10, 2014Publication date: June 18, 2015Inventors: Fumiyoshi Saito, Yusuke Ishida, Naoki Mugita, Katsuya Nose, Toshihisa Yago, Kousuke Takeuchi
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Publication number: 20150139697Abstract: A developing apparatus including a first chamber; a second chamber forming a circulation path for the developer; a rotatable shaft in the first chamber; a first blade provided on the rotation shaft to feed the developer in a predetermined direction in the first chamber; a second blade provided on the rotation shaft to feed the developer fed by the first blade in a direction opposite the predetermined direction; a discharging portion provided downstream of the second blade to discharge the developer in the first chamber; and a regulating member having a regulating surface continuously extending in a rotational moving direction of the rotation shaft, the regulating member being provided on the rotation shaft in a region between the first blade and the second blade, a region connecting with a downstream end of the first blade, or a connecting with a downstream end of the second blade.Type: ApplicationFiled: November 20, 2014Publication date: May 21, 2015Inventors: Hisashi Tsukijima, Yusuke Ishida, Takanori Iida
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Publication number: 20150139696Abstract: A developing device includes: a developer carrying member; a first chamber; a second chamber; a feeding member; a discharging portion; and a regulating portion, provided above a rotation center of the feeding member so as to oppose a reverse feeding portion of the feeding member with respect to a rotational axis direction of the feeding member, for regulating a gap between an inner wall of the second chamber and the reverse feeding portion so as to be narrowed. The regulating portion is provided at least in a position opposite from the first chamber with respect to the rotation center of the feeding member as seen in the rotational axis direction of the feeding member.Type: ApplicationFiled: November 6, 2014Publication date: May 21, 2015Inventors: Yusuke Ishida, Takanori Iida, Hisashi Tsukijima
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Patent number: 9002242Abstract: A developing apparatus includes a grooved developer carrying member configured to carry a developer to a developing region opposing an image bearing member, and a regulating member configured to regulate an amount of the carried developer. The regulating member includes a guide portion configured to guide the developer to a regulating position in which the regulating member is closest to the developer carrying member, with the guide portion being located on an upstream side with respect to the regulating position in a rotation direction of the developer carrying member and being shaped so that a gap between the guide portion and a tangent of the developer carrying member at the regulating position becomes narrower toward a downstream side in the rotation direction.Type: GrantFiled: February 26, 2013Date of Patent: April 7, 2015Assignee: Canon Kabushiki KaishaInventor: Yusuke Ishida
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Publication number: 20150030354Abstract: A development device includes a developer container 2 that can store developer, a conveyance portion arranged rotatable in a storage portion formed with a discharge opening, and conveying the developer toward an end, on which the discharge opening is formed, in the longitudinal direction, a conveyance screw including a return screw that applies force of pushing back a flow of the developer, which moves toward the discharge opening, in the opposite direction, and a magnet member provided in the developer container in the vicinity of a level of the developer on at least the return portion, wherein a magnetic brush formed by the magnetic force of the magnet member interferes with the return portion.Type: ApplicationFiled: July 14, 2014Publication date: January 29, 2015Inventor: Yusuke Ishida
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Publication number: 20150003876Abstract: A developing apparatus, including: a developer carrying member; a containing portion configured to contain developer; a discharge outlet through which a surplus of the developer is discharged; a first conveying portion configured to convey the developer; a second conveying portion provided downstream of the first conveying portion in a conveying direction of the first conveying portion and having a spiral blade portion configured to convey the developer in a conveying direction opposite to the conveying direction of the first conveying portion; a disk portion provided upstream of the second conveying portion in the conveying direction of the second conveying portion, the disk portion being formed to project radially-outwardly from a whole circumference of a rotary shaft, wherein an upstream end of the spiral blade portion of the second conveying portion in the conveying direction of the second conveying portion and the disk portion are arranged with an interval therebetween.Type: ApplicationFiled: June 18, 2014Publication date: January 1, 2015Inventors: Takanori Iida, Yusuke Ishida, Hisashi Tsukijima
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Patent number: 8805215Abstract: An image forming apparatus includes an image forming portion that forms an image on a first image bearing member, a transfer member that transfers the image on the first image bearing member to a second image bearing member, a power supply, a detecting portion that detects a voltage value and a current value, a velocity changing portion, an environment detecting portion, and a controller that determines a transfer voltage value in transferring an image based on a result detected at the detecting portion. An image can be formed at the plurality of velocities. The controller determines a transfer voltage value at a velocity other than the plurality of velocities based on a result detected at the detecting portion and a result detected at the environment detecting portion when the first image bearing member is operated at a predetermined velocity.Type: GrantFiled: August 10, 2012Date of Patent: August 12, 2014Assignee: Canon Kabushiki KaishaInventor: Yusuke Ishida
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Patent number: 8777426Abstract: A projection type display includes an optical system that includes a focus lens and is configured to project an image, a driver configured to move the focus lens along an optical axis, a phase difference sensor configured to receive light of the image that has been projected, and a controller configured to calculate a phase difference based on an output of the phase difference sensor, to calculate an in-focus position based on the phase difference that has been calculated, and to move the focus lens via the driver to the in-focus position for a focus control of the optical system, wherein the controller provides the focus control while a current position of the focus lens is located within an allowable range that is previously set in a movable range over which the focus lens can move along the optical axis.Type: GrantFiled: May 29, 2009Date of Patent: July 15, 2014Assignee: Canon Kabushiki KaishaInventor: Yusuke Ishida
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Patent number: 8768184Abstract: An image forming apparatus includes an image bearing member, a developing device for developing an electrostatic latent image including a developer and a developer carrying member, a sensor for detecting information related to a toner charge amount of the developer, and a controller. An image forming period has a first period and a second period, during which different modes are executed by the controller to provide for a lower speed of the developer carrying member in the first period than in the second period. The controller is capable of executing an operation that lowers the potential difference between a non-image-forming portion of the image bearing member and the developing bias applied to the developer carrying member based on detection results of the sensor.Type: GrantFiled: December 8, 2011Date of Patent: July 1, 2014Assignee: Canon Kabushiki KaishaInventor: Yusuke Ishida
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Patent number: 8662681Abstract: The image projection apparatus projects an image onto a projection surface through a projection optical system including a focus element (104) movable in an optical axis direction. The apparatus includes a shift mechanism that moves the projection optical system in a shift direction including a directional component orthogonal to the optical axis direction so as to move a position of the projected image on the projection surface, a shift position detector that detects a shift position of the projection optical system moved by the shift mechanism, a temperature detector that detects a temperature, and a controller that moves the focus element. The controller moves the focus element depending on the temperature detected by the temperature detector and on the shift position detected by the shift position detector.Type: GrantFiled: May 6, 2011Date of Patent: March 4, 2014Assignee: Canon Kabushiki KaishaInventor: Yusuke Ishida
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Publication number: 20130243495Abstract: In the case where V-groove portions in a surface of a developing sleeve are located in the closest position between the developing sleeve and a regulating blade, an angle ? formed by a slope surface of the regulating blade with a downstream surface of a V-groove in a rotation direction of the developing sleeve is set to less than 90°.Type: ApplicationFiled: February 26, 2013Publication date: September 19, 2013Applicant: CANON KABUSHIKI KAISHAInventor: Yusuke Ishida
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Publication number: 20130058665Abstract: An image forming apparatus includes: an image bearing member; a development device that includes a developer bearing member in a development position opposite to the image bearing member to develop an electrostatic latent image formed on the image bearing member, the developer bearing member bearing and conveying a developer; a bias applying portion that applies a development bias to the developer bearing member; a recording-material sensing portion that senses a type of a recording material to which a toner image developed by the development device is transferred; and a controller that controls the bias applying portion to apply the development bias that degrades a development characteristic when the recording material has low smoothness, compared to high smoothness, from a sensing result of the recording-material sensing portion.Type: ApplicationFiled: August 10, 2012Publication date: March 7, 2013Applicant: CANON KABUSHIKI KAISHAInventor: Yusuke Ishida
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Publication number: 20130058664Abstract: An image forming apparatus includes: an image forming portion that forms an image on a first image bearing member; a transfer member that transfers the image on the first image bearing member to a second image bearing member; a power supply; a detecting portion that detects a voltage value and a current value; a velocity changing portion; an environment detecting portion; and a controller that determines a transfer voltage value in transferring an image based on a result detected at the detecting portion. An image can be formed at the plurality of velocities. The controller determines a transfer voltage value at a velocity other than the plurality of velocities based on a result detected at the detecting portion and a result detected at the environment detecting portion when the first image bearing member is operated at a predetermined velocity.Type: ApplicationFiled: August 10, 2012Publication date: March 7, 2013Applicant: CANON KABUSHIKI KAISHAInventor: Yusuke Ishida
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Publication number: 20130006142Abstract: A suction puncture device includes a puncture needle having an outer tube that has an opening edge of a first front end formed in the shape of a blade, and a stopper member that has a second front end disposed within the outer tube at a position separated from the first front end of the outer tube by a predetermined distance. A sample containing portion is formed between the second front end of the stopper member and the first front end of the outer tube. A ventilation passage is formed around the stopper member within the outer tube, a suction unit is connected to a first base end side of the outer tube, and the suction unit is communicated with and connected to the sample containing portion via the ventilation passage.Type: ApplicationFiled: September 14, 2012Publication date: January 3, 2013Applicants: OLYMPUS MEDICAL SYSTEMS CORP., KURUME UNIVERSITYInventors: Yoshinobu OKABE, Ryohei KAJI, Yusuke ISHIDA, Makiko YASUMOTO, Tomohiko YAMAGUCHI, Tomoki TAHIRA, Tomohiko MAMIYA, Kenji SHIBAKI
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Patent number: 8320785Abstract: An image forming apparatus includes first and second image forming portions. The first and second image forming portions forms a toner image. The second image forming portion forms a toner image so that the toner image is superimposed on the toner image formed by the first image forming portion. The second image forming portion includes an image bearing member, a cleaning member that removes transfer residual toner existing on the image bearing member at an abutting position, and a supply unit that supplies abrasive particles or toner to the abutting position. The image forming apparatus includes a controller that controls the amount of toners or abrasive particles, which are supplied by the supply unit, in accordance with the amount of toner used in the first and second image forming portions.Type: GrantFiled: January 7, 2010Date of Patent: November 27, 2012Assignee: Canon Kabushiki KaishaInventor: Yusuke Ishida
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Publication number: 20120155892Abstract: An image forming apparatus includes a drum; a developing device, including a developer carrying member for carrying a developer including a non magnetic toner and a magnetic carrier and for conveying the developer to a developing position in which the developer carrying member opposes the drum; a detecting portion for detecting information correlating to a toner charge amount of the developer in the developing device; and a controller capable of executing an operation in a mode, wherein drive of the developer carrying member in a first period in which a non image formation area of the drum corresponding to an internal between a recording material and a subsequent recording material passes through the developing position is stopped or lowered in speed less than that in a second period in which an image area corresponding to the recording material passes through the developing position.Type: ApplicationFiled: December 8, 2011Publication date: June 21, 2012Applicant: CANON KABUSHIKI KAISHAInventor: Yusuke Ishida