Patents by Inventor Ryuhei Shoji
Ryuhei Shoji 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: 20230294953Abstract: A buffer unit receives a sheet and temporarily holds a predetermined number of sheets so as to be overlaid on one another. A stacking unit stacks the predetermined number of sheets conveyed toward a first direction. A moving unit comes into contact with an uppermost sheet among the predetermined number of sheets stacked on the stacking unit and moves the uppermost sheet further toward the first direction. A regulating unit comes into contact with an end portion of the stack of sheets on the stacking unit to regulate the position of the stack of sheets. A control unit controls the predetermined number of sheets.Type: ApplicationFiled: March 8, 2023Publication date: September 21, 2023Inventor: RYUHEI SHOJI
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Publication number: 20230150789Abstract: A sheet processing apparatus includes a conveyance unit configured to convey a sheet in a sheet conveyance direction, a punching unit configured to punch a hole to the sheet being conveyed by the conveyance unit, a moving unit configured to move the punching unit in an intersecting direction intersecting the sheet conveyance direction, a detection unit arranged upstream of the punching unit in the sheet conveyance direction and configured to change an output value based on a position of an edge portion, in the intersecting direction, of the sheet being conveyed, a cleaning portion configured to clean the detection unit, and an interlocking portion configured to move the cleaning portion so as to clean the detection unit by interlocking with a movement of the punching unit in the intersecting direction.Type: ApplicationFiled: October 28, 2022Publication date: May 18, 2023Inventors: Ryuhei Shoji, Yasuhiro Nakahara
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Patent number: 10065819Abstract: An image forming apparatus includes feeding, conveying, and separating members, and detecting, image forming, and control units. The feeding member feeds a recording material placed on a tray. The separating member and the conveying member separate recording materials at a nip. The detecting unit detects that the recording materials have been fed to the nip. The image forming unit forms an image on fed recording material. The control unit switches between a first and second control. Under the first control, the feeding member starts feeding a recording material placed on the tray, and ends feeding before a recording material trailing end passes through the feeding member. Under the second control, the feeding member starts feeding a recording material placed on the tray, and ends feeding after a recording material trailing end passes through the feeding member when the detection unit detects that the recording materials are fed to the nip.Type: GrantFiled: March 13, 2017Date of Patent: September 4, 2018Assignee: Canon Kabushiki KaishaInventors: Ryuhei Shoji, Yuta Hojo, Shingo Harada
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Publication number: 20170269533Abstract: An image forming apparatus includes feeding, conveying, and separating members, and detecting, image forming, and control units. The feeding member feeds a recording material placed on a tray. The separating member and the conveying member separate recording materials at a nip. The detecting unit detects that the recording materials have been fed to the nip. The image forming unit forms an image on fed recording material. The control unit switches between a first and second control. Under the first control, the feeding member starts feeding a recording material placed on the tray, and ends feeding before a recording material trailing end passes through the feeding member. Under the second control, the feeding member starts feeding a recording material placed on the tray, and ends feeding after a recording material trailing end passes through the feeding member when the detection unit detects that the recording materials are fed to the nip.Type: ApplicationFiled: March 13, 2017Publication date: September 21, 2017Inventors: Ryuhei Shoji, Yuta Hojo, Shingo Harada
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Patent number: 9075338Abstract: An image forming apparatus includes a control unit. The control unit is capable of executing a first mode for forming a toner image on the photosensitive member that rotates at a first speed and a second mode for forming a toner image on the photosensitive member that rotates at a second speed slower than the first speed, and the control unit causes the light illumination unit to perform the weak exposure in the first mode without thinning the scanning surface of the deflection scanning unit and perform the weak exposure in the second mode while thinning the scanning surface of the deflection scanning unit.Type: GrantFiled: June 5, 2013Date of Patent: July 7, 2015Assignee: Canon Kabushiki KaishaInventors: Ryuhei Shoji, Hirotaka Shiomichi, Jun Haruna
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Patent number: 9048739Abstract: The power supply device includes a transformer, a switching unit for driving a primary side of the transformer, a detection unit for detecting an output corresponding to a current flowing on the primary side, a transmission unit for transmitting an output voltage from a secondary side to the primary side, and a control unit for controlling an operation of the switching unit in accordance with an output from the transmission unit, in which, when a switching frequency for driving the switching unit falls within a predetermined frequency range including a resonant frequency of the transformer, the control unit controls the switching unit so as to shorten a turn-ON time of the switching unit in accordance with an output from the detection unit.Type: GrantFiled: February 28, 2013Date of Patent: June 2, 2015Assignee: CANON KABUSHIKI KAISHAInventors: Ryuhei Shoji, Masaru Aoki, Minoru Hayasaki
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Patent number: 9031431Abstract: An apparatus includes a unit configured to judge a border between two patch images among a plurality of patch images formed on the recording material, based on change in the amount of the light beam of at least one noticed wavelength detected by a detection unit; a unit configured to calculate a color value of a patch image from the amount of the light beam of each wavelength detected by the detection unit; and a control unit configured to control an accumulation period of charge for the photoelectric conversion at the detection unit. The control unit is further configured to make the accumulation period of the detection unit shorter when judging the border between the two patch images than when calculating the color value of each of the two patch images.Type: GrantFiled: June 8, 2012Date of Patent: May 12, 2015Assignee: Canon Kabushiki KaishaInventor: Ryuhei Shoji
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Patent number: 8989613Abstract: The power supply device includes a transformer, a switching unit for driving a primary side of the transformer, a detection unit for detecting an output corresponding to a current flowing on the primary side, a transmission unit for transmitting an output voltage from a secondary side to the primary side, and a control unit for controlling an operation of the switching unit in accordance with an output from the transmission unit, in which, when a switching frequency for driving the switching unit falls within a predetermined frequency range including a resonant frequency of the transformer, the control unit controls the switching unit so as to shorten a turn-ON time of the switching unit in accordance with an output from the detection unit.Type: GrantFiled: February 28, 2013Date of Patent: March 24, 2015Assignee: Canon Kabushiki KaishaInventors: Ryuhei Shoji, Masaru Aoki, Minoru Hayasaki
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Patent number: 8913905Abstract: An image forming apparatus includes a detection unit configured to irradiate a patch image formed on a recording material with light, and detect light intensities at a plurality of wavelengths in the light reflected from the patch image; and a determination unit configured to determine that a patch image for which the detection unit is detecting light intensities has transitioned from a first patch image to a second patch image, wherein the determination unit is further configured to determine that the patch image for which the detection unit is detecting has transitioned, in a case where a light intensity at a wavelength for identification of a patch image to be identified, has varied by an amount greater than a first threshold corresponding to that wavelength for identification.Type: GrantFiled: January 30, 2012Date of Patent: December 16, 2014Assignee: Canon Kabushiki KaishaInventors: Hirotaka Shiomichi, Ryuhei Shoji, Ken Yokoyama
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Patent number: 8670014Abstract: This invention has as its object to improve an image formation throughput. An image forming apparatus of this invention times a time required until an image formation is ready to start after a reference signal is output, and executes the image formation when the image formation is ready to start (for example, initial processes are complete). Furthermore, when the next reference signal is output during the image formation, the image forming apparatus executes an image formation of the next color after a waiting process based on the timed time.Type: GrantFiled: November 15, 2010Date of Patent: March 11, 2014Assignee: Canon Kabushiki KaishaInventors: Ryuhei Shoji, Hironobu Nihei
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Publication number: 20130328987Abstract: An image forming apparatus includes a control unit. The control unit is capable of executing a first mode for forming a toner image on the photosensitive member that rotates at a first speed and a second mode for forming a toner image on the photosensitive member that rotates at a second speed slower than the first speed, and the control unit causes the light illumination unit to perform the weak exposure in the first mode without thinning the scanning surface of the deflection scanning unit and perform the weak exposure in the second mode while thinning the scanning surface of the deflection scanning unit.Type: ApplicationFiled: June 5, 2013Publication date: December 12, 2013Inventors: Ryuhei Shoji, Hirotaka Shiomichi, Jun Haruna
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Publication number: 20130236206Abstract: The power supply device includes a transformer, a switching unit for driving a primary side of the transformer, a detection unit for detecting an output corresponding to a current flowing on the primary side, a transmission unit for transmitting an output voltage from a secondary side to the primary side, and a control unit for controlling an operation of the switching unit in accordance with an output from the transmission unit, in which, when a switching frequency for driving the switching unit falls within a predetermined frequency range including a resonant frequency of the transformer, the control unit controls the switching unit so as to shorten a turn-ON time of the switching unit in accordance with an output from the detection unit.Type: ApplicationFiled: February 28, 2013Publication date: September 12, 2013Applicant: CANON KABUSHIKI KAISHAInventors: Ryuhei Shoji, Masaru Aoki, Minoru Hayasaki
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Patent number: 8400698Abstract: Disclosed is an oscillator device that includes an oscillating system having a first oscillator, a second oscillator, a first torsion spring for connecting the first and second oscillators each other, and a second torsion spring being connected to the second oscillator and having a common torsional axis with the first torsion spring; a supporting system for supporting the oscillating system; a driving system for driving the oscillating system so that at least one of the first and second oscillators produces oscillation as can be expressed by an equation that contains a sum of a plurality of time functions; a signal producing system for producing an output signal corresponding to displacement of at least one of the first and second oscillators; and a drive control system for controlling the driving system on the basis of the output signal of the signal producing system so that at least one of amplitude and phase of the time function takes a predetermined value.Type: GrantFiled: February 13, 2007Date of Patent: March 19, 2013Assignee: Canon Kabushiki KaishaInventors: Kazunari Fujii, Yukio Furukawa, Takahiro Akiyama, Ryuhei Shoji, Soichiro Suzuki, Shimpei Matsuo, Tatsuya Hotogi, Shinichiro Iimura
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Publication number: 20120328312Abstract: An apparatus includes a unit configured to judge a border between two patch images among a plurality of patch images formed on the recording material, based on change in the amount of the light beam of at least one noticed wavelength detected by a detection unit; a unit configured to calculate a color value of a patch image from the amount of the light beam of each wavelength detected by the detection unit; and a control unit configured to control an accumulation period of charge for the photoelectric conversion at the detection unit. The control unit is further configured to make the accumulation period of the detection unit shorter when judging the border between the two patch images than when calculating the color value of each of the two patch images.Type: ApplicationFiled: June 8, 2012Publication date: December 27, 2012Applicant: CANON KABUSHIKI KAISHAInventor: Ryuhei Shoji
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Publication number: 20120219306Abstract: An image forming apparatus includes a detection unit configured to irradiate a patch image formed on a recording material with light, and detect light intensities at a plurality of wavelengths in the light reflected from the patch image; and a determination unit configured to determine that a patch image for which the detection unit is detecting light intensities has transitioned from a first patch image to a second patch image, wherein the determination unit is further configured to determine that the patch image for which the detection unit is detecting has transitioned, in a case where a light intensity at a wavelength for identification of a patch image to be identified, has varied by an amount greater than a first threshold corresponding to that wavelength for identification.Type: ApplicationFiled: January 30, 2012Publication date: August 30, 2012Applicant: CANON KABUSHIKI KAISHAInventors: Hirotaka Shiomichi, Ryuhei Shoji, Ken Yokoyama
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Publication number: 20110129244Abstract: This invention has as its object to improve an image formation throughput. An image forming apparatus of this invention times a time required until an image formation is ready to start after a reference signal is output, and executes the image formation when the image formation is ready to start (for example, initial processes are complete). Furthermore, when the next reference signal is output during the image formation, the image forming apparatus executes an image formation of the next color after a waiting process based on the timed time.Type: ApplicationFiled: November 15, 2010Publication date: June 2, 2011Applicant: CANON KABUSHIKI KAISHAInventors: Ryuhei Shoji, Hironobu Nihei
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Publication number: 20090051992Abstract: Disclosed is an oscillator device that includes an oscillating system having a first oscillator, a second oscillator, a first torsion spring for connecting the first and second oscillators each other, and a second torsion spring being connected to the second oscillator and having a common torsional axis with the first torsion spring; a supporting system for supporting the oscillating system; a driving system for driving the oscillating system so that at least one of the first and second oscillators produces oscillation as can be expressed by an equation that contains a sum of a plurality of time functions; a signal producing system for producing an output signal corresponding to displacement of at least one of the first and second oscillators; and a drive control system for controlling the driving system on the basis of the output signal of the signal producing system so that at least one of amplitude and phase of the time function takes a predetermined value.Type: ApplicationFiled: February 13, 2007Publication date: February 26, 2009Applicant: CANON KABUSHIKI KAISHAInventors: Kazunari Fujii, Yukio Furukawa, Takahiro Akiyama, Ryuhei Shoji, Soichiro Suzuki, Shimpei Matsuo, Tatsuya Hotogi, Shinichiro Iimura
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Patent number: 7446921Abstract: An image forming apparatus detects a oscillating state of a oscillation system with a oscillation detector and controls oscillation of the oscillation system such that the oscillation system oscillates a reflective member in a balanced steady state by adjusting a drive force of a drive unit with one or more drive control parameter values on the basis of the detection result obtained by the oscillation detector. When the balanced steady state is detected, the drive control parameter values are stored and are used when an exposure unit is reactivated.Type: GrantFiled: November 1, 2007Date of Patent: November 4, 2008Assignee: Canon Kabushiki KaishaInventors: Souichirou Suzuki, Kenjiro Hori, Shimpei Matsuo, Ryuhei Shoji, Tatsuya Hotogi, Kazunari Fujii
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Publication number: 20080106776Abstract: An image forming apparatus detects a oscillating state of a oscillation system with a oscillation detector and controls oscillation of the oscillation system such that the oscillation system oscillates a reflective member in a balanced steady state by adjusting a drive force of a drive unit with one or more drive control parameter values on the basis of the detection result obtained by the oscillation detector. When the balanced steady state is detected, the drive control parameter values are stored and are used when an exposure unit is reactivated.Type: ApplicationFiled: November 1, 2007Publication date: May 8, 2008Applicant: CANON KABUSHIKI KAISHAInventors: Soichirou Suzuki, Kenjiro Hori, Shimpei Matsuo, Ryuhei Shoji, Tatsuya Hotogi, Kazunari Fujii