Patents by Inventor Shingo Takai
Shingo Takai 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: 20230302834Abstract: A liquid discharge apparatus according to an aspect of the present disclosure is a liquid discharge apparatus for forming an image on a recording medium, the liquid discharge apparatus including a first image obtaining unit configured to obtain first image data, a second image generating unit configured to generate second image data by adding a predetermined figure to the first image data, a correcting unit configured to generate third image data obtained by correcting, for each of pages, the first image data, based on the second image data and read image data obtained by reading an image formed on the recording medium based on the second image data, and a liquid discharging unit configured to discharge liquid onto the recording medium, based on the third image data.Type: ApplicationFiled: September 14, 2021Publication date: September 28, 2023Inventors: Dai KURABAYASHI, Yuichiro MAEYAMA, Shingo TAKAI, Noboru HIRANO, Yohei SAKON
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Patent number: 11420450Abstract: A printing apparatus includes a printing device to print, on a sheet, a detection mark for acquiring an amount of deviation of an image, a detection device to read a position of the detection mark and acquire the amount of deviation of the position of the detection mark, and control circuitry to perform correction according to the amount of deviation. The circuitry prints the detection marks on both faces of the sheet in duplex printing, reads the detection marks on both faces with the detection device, calculates a first correction value from the position of the detection mark on a first face on which printing is performed first, calculates a second correction value from the position of the detection mark on a second face on which printing is performed later, and calculates a third correction value from the positions of the detection marks on the first and second faces.Type: GrantFiled: November 9, 2020Date of Patent: August 23, 2022Assignee: Ricoh Company, Ltd.Inventors: Yuichiro Maeyama, Yohei Sakon, Shingo Takai, Noboru Hirano, Dai Kurabayashi
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Publication number: 20210146701Abstract: A printing apparatus includes a printing device to print, on a sheet, a detection mark for acquiring an amount of deviation of an image, a detection device to read a position of the detection mark and acquire the amount of deviation of the position of the detection mark, and control circuitry to perform correction according to the amount of deviation. The circuitry prints the detection marks on both faces of the sheet in duplex printing, reads the detection marks on both faces with the detection device, calculates a first correction value from the position of the detection mark on a first face on which printing is performed first, calculates a second correction value from the position of the detection mark on a second face on which printing is performed later, and calculates a third correction value from the positions of the detection marks on the first and second faces.Type: ApplicationFiled: November 9, 2020Publication date: May 20, 2021Applicant: Ricoh Company, Ltd.Inventors: Yuichiro Maeyama, Yohei Sakon, Shingo Takai, Noboru Hirano, Dai Kurabayashi
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Patent number: 9411292Abstract: An image forming apparatus includes an image forming unit forming an image on a first recording medium based on image data, a measurement unit being positioned in an immediate vicinity of the image forming unit, being arranged upstream of a sheet-conveyance path than the image forming unit, and measuring a size of the first recording medium, an expansion ratio calculation unit calculating an expansion ratio of the first recording medium based on a first size of the first recording medium obtained before the first recording medium is passed through the image forming unit and a second size of the first recording medium obtained after the first recording medium is passed through the image forming unit, and a correction unit correcting the image data used for forming another image on a second recording medium conveyed after the first recording medium based on the expansion ratio.Type: GrantFiled: July 25, 2013Date of Patent: August 9, 2016Assignee: Ricoh Company, Ltd.Inventors: Makoto Nakura, Naoto Ueda, Satoshi Ueda, Shingo Takai, Koichi Kudo
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Patent number: 9354537Abstract: An image forming apparatus includes an image forming unit that forms an image on a recording medium; a width detector that detects positions of side edges of the recording medium in a width direction, which is orthogonal to a conveying direction in which the recording medium is conveyed, at multiple detection positions along the conveying direction; a shape calculator that calculates angles between the conveying direction and straight lines each connecting the positions of the same side edge detected at the multiple detection positions and calculates a shape of the recording medium based on the angles; and a correction unit that corrects image data of the image to be formed by the image forming unit based on the calculated shape of the recording medium.Type: GrantFiled: July 25, 2013Date of Patent: May 31, 2016Assignee: Ricoh Company, Ltd.Inventors: Naoto Ueda, Makoto Nakura, Shingo Takai, Satoshi Ueda, Koichi Kudo
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Patent number: 9179027Abstract: An image forming apparatus includes an image forming unit to form an image on a recording medium; an inverting transport unit to invert first and second surfaces of the recording medium, and front and rear ends of the recording medium to transport the inverted recording medium; a recording medium width measuring unit to measure an end position of the recording medium in a width direction orthogonal to a transporting direction of the recording medium at a measuring position having an approximately identical distance from one end of the recording medium in the transporting direction before and after the image is formed on the recording medium; and a correcting unit to correct an image to be formed on a subsequent recording medium based on a change in a shape of the recording medium computed based on a measured result from the recording medium width measuring unit.Type: GrantFiled: October 22, 2013Date of Patent: November 3, 2015Assignee: RICOH COMPANY, LTD.Inventors: Makoto Nakura, Naoto Ueda, Shingo Takai, Satoshi Ueda
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Patent number: 9152119Abstract: A cooling device includes: a cooling roller that cools down a sheet-like member by coming into contact with the sheet-like member; a belt member that is rotatably extended by a plurality of extending members, presses the sheet-like member against the cooling roller, and holds and carries the sheet-like member; and a driving roller that serves as one of the plurality of extending members and drives to rotate the belt member, wherein the driving roller is axially divided into a plurality of rollers and each of the plurality of rollers has a crown-like shape whose outer diameter continuously becomes larger from both end parts to a center part in an axial direction.Type: GrantFiled: October 3, 2011Date of Patent: October 6, 2015Assignee: Ricoh Company, Ltd.Inventors: Shingo Takai, Yutaka Shoji
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Patent number: 9152118Abstract: A sheet conveying apparatus includes a sheet conveying unit that conveys a sheet including a drive roller, a driven roller, and a rotary encoder provided on a rotational axle of one of the drive roller and the driven roller; a conveying amount measuring unit that measures a conveying amount of the sheet; a first detection unit positioned downstream of the sheet conveying unit, the first detection unit being positioned apart from the drive roller and the driven roller not to overlap with the drive roller and the driven roller in the conveying direction; a second detection unit positioned upstream of the sheet conveying unit; and a conveying distance calculation unit that calculates a conveying distance of the sheet based on the measured result by the conveying amount measuring unit and the detected results detected by the first detection unit and the second detection unit.Type: GrantFiled: August 11, 2014Date of Patent: October 6, 2015Assignee: RICOH COMPANY, LTD.Inventors: Makoto Nakura, Takuro Kamiya, Shingo Takai, Naoto Ueda, Satoshi Ueda, Akira Kobashi, Koichi Kudo
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Patent number: 9132977Abstract: A sheet conveying apparatus includes a sheet conveying unit including a drive roller and a driven roller; a downstream detection unit and an upstream detection unit; a conveying amount measuring unit that measures a conveying amount of the sheet; and a conveying distance calculation unit that calculates a conveying distance of the sheet, wherein a distance between the downstream detection unit and the upstream detection unit or a perimeter of one of the drive roller and the driven roller is set such that an expected conveying distance calculated based on a set sheet length of an expected value of the sheet becomes a substantially integer multiple of a perimeter of the one of the drive roller and the driven roller.Type: GrantFiled: September 25, 2014Date of Patent: September 15, 2015Assignee: RICOH COMPANY, LTD.Inventors: Naoto Ueda, Makoto Nakura, Shingo Takai, Koichi Kudo, Satoshi Ueda, Akira Kobashi
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Publication number: 20150008639Abstract: A sheet conveying apparatus includes a sheet conveying unit including a drive roller and a driven roller; a downstream detection unit and an upstream detection unit; a conveying amount measuring unit that measures a conveying amount of the sheet; and a conveying distance calculation unit that calculates a conveying distance of the sheet, wherein a distance between the downstream detection unit and the upstream detection unit or a perimeter of one of the drive roller and the driven roller is set such that an expected conveying distance calculated based on a set sheet length of an expected value of the sheet becomes a substantially integer multiple of a perimeter of the one of the drive roller and the driven roller.Type: ApplicationFiled: September 25, 2014Publication date: January 8, 2015Applicant: RICOH COMPANY, LTD.Inventors: Naoto UEDA, Makoto NAKURA, Shingo TAKAI, Koichi KUDO, Satoshi UEDA, Akira KOBASHI
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Patent number: 8910939Abstract: A disclosed sheet carrying device includes a first carrying unit that includes a first rotary body, a first driving unit outputting a driving force at a first peripheral speed, a one-way clutch transmitting the driving force only in a sheet carrying direction, and a second rotary body driven by the first rotary body via the sheet; and a second carrying unit including a third rotary body rotating at a second peripheral speed being the first peripheral speed or more, a fourth rotary body carrying the sheet with the third rotary body, a second driving unit outputting a driving force for driving the fourth rotary body at a third peripheral speed being the second peripheral speed or more, and a torque limiter having a slip torque smaller than a sheet carrying torque and cutting off the driving force while the sheet is interposed between the third and fourth rotary bodies.Type: GrantFiled: February 28, 2013Date of Patent: December 16, 2014Assignee: Ricoh Company, Ltd.Inventors: Makoto Nakura, Naoto Ueda, Koichi Kudo, Shingo Takai
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Publication number: 20140348563Abstract: A sheet conveying apparatus includes a sheet conveying unit that conveys a sheet including a drive roller, a driven roller, and a rotary encoder provided on a rotational axle of one of the drive roller and the driven roller; a conveying amount measuring unit that measures a conveying amount of the sheet; a first detection unit positioned downstream of the sheet conveying unit, the first detection unit being positioned apart from the drive roller and the driven roller not to overlap with the drive roller and the driven roller in the conveying direction; a second detection unit positioned upstream of the sheet conveying unit; and a conveying distance calculation unit that calculates a conveying distance of the sheet based on the measured result by the conveying amount measuring unit and the detected results detected by the first detection unit and the second detection unit.Type: ApplicationFiled: August 11, 2014Publication date: November 27, 2014Applicant: RICOH COMPANY, LTD.Inventors: Makoto NAKURA, Takuro KAMIYA, Shingo TAKAI, Naoto UEDA, Satoshi UEDA, Akira KOBASHI, Koichi KUDO
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Publication number: 20140312562Abstract: A sheet conveying apparatus includes a detecting unit configured to detect a sheet; a conveying unit including a driving roller and a driven roller that rotates in conformity with the driving roller and configured to convey the sheet by holding the sheet between the driving roller and the driven roller; a disk configured to rotate in correspondence with the driven roller and including multiple slits arranged in a periphery thereof; first and second sensors configured to detect the multiple slits and output detection signals, the first and second sensors being provided substantially opposite to each other where a rotational axle of the disk is positioned at a center between the first and second sensors; and a conveyance distance calculating unit configured to calculate a sheet conveying distance based on a detection result of the detecting unit and the detection signals.Type: ApplicationFiled: April 10, 2014Publication date: October 23, 2014Applicant: RICOH COMPANY, LTD.Inventors: Naoto UEDA, Makoto NAKURA, Shingo TAKAI, Satoshi UEDA
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Patent number: 8864133Abstract: Disclosed is a device for correcting an edge portion of a sheet material, including a first roller provided in a sheet material conveying path, a second roller including a center shaft and side rollers provided at both sides thereof, the center shaft having an outer diameter less than a minimum diameter of the side rollers, each of the side rollers having an outer diameter increasing from a center side to an outer side thereof, and a pressing unit configured to cause the second roller to bend toward the first roller to press the side rollers of the second roller against the first roller.Type: GrantFiled: March 15, 2013Date of Patent: October 21, 2014Assignee: Ricoh Company, Ltd.Inventors: Shingo Takai, Toshihiro Nakagaki
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Patent number: 8838010Abstract: A sheet conveying apparatus includes a sheet conveying unit that conveys a sheet; a conveying amount measuring unit that measures a conveying amount of the sheet conveyed by the sheet conveying unit; a first detection unit that detects the sheet downstream of the sheet conveying unit in a conveying direction of the sheet; a second detection unit that detects the sheet upstream of the sheet conveying unit in the conveying direction of the sheet; and a conveying distance calculation unit that calculates a conveying distance of the sheet based on the measured result by the conveying amount measuring unit and the detected results detected by the first detection unit and the second detection unit.Type: GrantFiled: July 27, 2012Date of Patent: September 16, 2014Assignee: Ricoh Company, Ltd.Inventors: Makoto Nakura, Takuro Kamiya, Shingo Takai, Naoto Ueda, Satoshi Ueda, Akira Kobashi, Koichi Kudo
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Patent number: 8800160Abstract: A sheet length measuring device includes a rotating body configured to rotate with a movement of a sheet in a conveying direction; a position detecting unit configured to detect leading and trailing ends of the sheet passing through a position of the rotating body; a measuring unit configured to measure a rotation amount of the rotating body and output an origin signal per one revolution of the rotating body; a storage unit configured to store changes of a sheet conveying amount with respect to respective rotation angles in one revolution of the rotating body; and a calculating unit configured to calculate a corrected length of the sheet from a value obtained from a rotation angle of the rotating body when the leading end of the sheet is detected and a value obtained from a rotation angle of the rotating body when the trailing end of the sheet is detected.Type: GrantFiled: May 21, 2012Date of Patent: August 12, 2014Assignee: Ricoh Company, LimitedInventors: Koichi Kudo, Makoto Nakura, Naoto Ueda, Satoshi Ueda, Akira Kobashi, Shingo Takai
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Publication number: 20140118762Abstract: An image forming apparatus includes an image forming unit to form an image on a recording medium; an inverting transport unit to invert first and second surfaces of the recording medium, and front and rear ends of the recording medium to transport the inverted recording medium; a recording medium width measuring unit to measure an end position of the recording medium in a width direction orthogonal to a transporting direction of the recording medium at a measuring position having an approximately identical distance from one end of the recording medium in the transporting direction before and after the image is formed on the recording medium; and a correcting unit to correct an image to be formed on a subsequent recording medium based on a change in a shape of the recording medium computed based on a measured result from the recording medium width measuring unit.Type: ApplicationFiled: October 22, 2013Publication date: May 1, 2014Inventors: Makoto NAKURA, Naoto Ueda, Shingo Takai, Satoshi Ueda
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Publication number: 20140037299Abstract: An image forming apparatus includes an image forming unit forming an image on a first recording medium based on image data, a measurement unit being positioned in an immediate vicinity of the image forming unit, being arranged upstream of a sheet-conveyance path than the image forming unit, and measuring a size of the first recording medium, an expansion ratio calculation unit calculating an expansion ratio of the first recording medium based on a first size of the first recording medium obtained before the first recording medium is passed through the image forming unit and a second size of the first recording medium obtained after the first recording medium is passed through the image forming unit, and a correction unit correcting the image data used for forming another image on a second recording medium conveyed after the first recording medium based on the expansion ratio.Type: ApplicationFiled: July 25, 2013Publication date: February 6, 2014Applicant: RICOH COMPANY, LTD.Inventors: Makoto NAKURA, Naoto Ueda, Satoshi Ueda, Shingo Takai, Koichi Kudo
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Publication number: 20140029961Abstract: An image forming apparatus includes an image forming unit that forms an image on a recording medium; a width detector that detects positions of side edges of the recording medium in a width direction, which is orthogonal to a conveying direction in which the recording medium is conveyed, at multiple detection positions along the conveying direction; a shape calculator that calculates angles between the conveying direction and straight lines each connecting the positions of the same side edge detected at the multiple detection positions and calculates a shape of the recording medium based on the angles; and a correction unit that corrects image data of the image to be formed by the image forming unit based on the calculated shape of the recording medium.Type: ApplicationFiled: July 25, 2013Publication date: January 30, 2014Applicant: Ricoh Company, Ltd.Inventors: Naoto UEDA, Makoto Nakura, Shingo Takai, Satoshi Ueda, Koichi Kudo
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Patent number: 8608164Abstract: A sheet conveying apparatus including: a sheet conveying unit; an upstream side guiding member that forms an upstream side conveying route of a sheet; a downstream side guiding member that forms a downstream side conveying route of the sheet; an upstream side detection unit; and a downstream side detection unit, wherein a detection position of the sheet for the upstream side detection unit is set between the sheet conveying unit and a position where the sheet is in contact with the upstream side guiding member, and a detection position of the sheet for the downstream side detection unit is set between the sheet conveying unit and a position where the sheet is in contact with the downstream side guiding member.Type: GrantFiled: August 21, 2012Date of Patent: December 17, 2013Assignee: Ricoh Company, Ltd.Inventors: Shingo Takai, Makoto Nakura, Naoto Ueda, Satoshi Ueda, Akira Kobashi, Koichi Kudo