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公开(公告)号：US20230176505A1
公开(公告)日：2023-06-08
申请号：US18075036
申请日：2022-12-05
Applicant: CANON KABUSHIKI KAISHA
Inventor： Yoshiya Numata , Hisashi Tsukijima
IPC: G03G15/14
CPC classification number: G03G15/14
Abstract: An image forming apparatus includes a rotatable image bearing member, a rotatable transfer member, a first driving source to drive the image bearing member, a second driving source to drive the transfer member, and a control. Based on a toner amount per unit area of the toner image transferred to each of a plurality of first divided regions of an in-plane of a recording material in a feeding direction, the control portion controls a driving speed of the transfer member while each of the plurality of the first divided regions passes through a transfer portion. The control portion acquires an index value correlating with a toner amount of the toner image transferred to each of a plurality of second divided regions of the first divided region in a widthwise direction, and controls the driving speed based on the index value while the first divided region passes through the transfer portion.
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公开(公告)号：US20230079066A1
公开(公告)日：2023-03-16
申请号：US17943524
申请日：2022-09-13
Applicant: CANON KABUSHIKI KAISHA
Inventor： Yoshiya Numata
Abstract: A sheet feeding apparatus includes a sheet supporting unit, a sheet feed unit, an air separation unit configured to separate the uppermost sheet by blowing the air onto a side surface of the sheet bundle supported by the sheet supporting unit, a velocity detection unit configured to detect actual velocity of a sheet fed by the sheet feed unit, a drive load detection unit configured to detect an actual drive load for feeding the sheet by the sheet feed unit, and a controller configured to control the sheet feed unit and the air separation unit. In a case where the sheet is fed by the sheet feed unit, the controller is configured to control an operation of the air separation unit depending on the actual velocity of the sheet detected by the velocity detection unit and the actual drive load detected by the drive load detection unit.
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公开(公告)号：US12084306B2
公开(公告)日：2024-09-10
申请号：US17943524
申请日：2022-09-13
Applicant: CANON KABUSHIKI KAISHA
Inventor： Yoshiya Numata
CPC classification number: B65H7/16 , B65H3/08 , B65H2301/442 , B65H2301/4461 , B65H2301/5143 , B65H2406/10 , B65H2513/10 , B65H2557/23 , B65H2701/12 , B65H2701/1311
Abstract: A sheet feeding apparatus includes a sheet supporting unit, a sheet feed unit, an air separation unit configured to separate the uppermost sheet by blowing the air onto a side surface of the sheet bundle supported by the sheet supporting unit, a velocity detection unit configured to detect actual velocity of a sheet fed by the sheet feed unit, a drive load detection unit configured to detect an actual drive load for feeding the sheet by the sheet feed unit, and a controller configured to control the sheet feed unit and the air separation unit. In a case where the sheet is fed by the sheet feed unit, the controller is configured to control an operation of the air separation unit depending on the actual velocity of the sheet detected by the velocity detection unit and the actual drive load detected by the drive load detection unit.
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公开(公告)号：US11952239B2
公开(公告)日：2024-04-09
申请号：US17539319
申请日：2021-12-01
Applicant: CANON KABUSHIKI KAISHA
Inventor： Yoshinao Chiba , Shingo Iwami , Koji Suzuki , Yuma Inui , Yoshiya Numata
CPC classification number: B65H9/166 , B65H7/10 , B65H7/14 , B65H9/04 , G03G15/6529 , G03G15/6564 , B65H2301/361 , B65H2404/1441 , B65H2801/06
Abstract: A sheet feeding device includes a feeding roller pair, a detecting portion, a first changing portion, a second changing portion, and a controller for controlling the first changing portion and the second changing portion. The controller starts a first feeding operation for feeding a sheet toward the obliquely feeding roller pair in a nipping state of the feeding roller pair and then starts a second feeding operation for feeding the sheet for abutting a side end of the sheet against the reference member in the nipping state of the obliquely feeding roller pair. The controller changes, after the first feeding operation is started and before the second feeding operation is started, a start timing of the second feeding operation on the basis of a detection result of a position of the side end of the sheet detected by the detecting portion.
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公开(公告)号：US20230017154A1
公开(公告)日：2023-01-19
申请号：US17841869
申请日：2022-06-16
Applicant: CANON KABUSHIKI KAISHA
Inventor： Yuma Inui , Shingo Iwami , Koji Suzuki , Yoshiya Numata , Yoshinao Chiba
Abstract: A sheet conveyance apparatus includes a conveyance guide configured to guide a sheet along a conveyance center line extending in a conveyance direction, a reference member including an abutment surface, a conveyance unit configured to convey the sheet while abutting a first edge of the sheet against the abutment surface, a detection unit configured to detect a first angle formed between the first edge of the sheet and a second edge adjacent to the first edge, a moving unit configured to move the reference member so as to change a second angle formed between the abutment surface and the conveyance center line, and a control unit configured to perform a movement process in which the moving unit moves the reference member such that, when the first angle is referred to as α, the second angle becomes an absolute value of a difference 90 degrees minus α.
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Patent Agency Ranking
公开(公告)号：US12092980B2
公开(公告)日：2024-09-17
申请号：US17931502
申请日：2022-09-12
Applicant: CANON KABUSHIKI KAISHA
Inventor： Koji Suzuki , Keisuke Mogi , Hisashi Tsukijima , Yuma Inui , Yoshiya Numata
CPC classification number: G03G15/5029 , G03G15/2039 , G03G15/6573 , G03G2215/00776 , G03G2215/00877
Abstract: A calculation system includes an obtaining unit and a calculation unit. The obtaining unit obtains information of a sheet. The calculation unit calculates an amount of change in length of the sheet in a conveyance direction of the sheet heated by a heating device to fix a toner image to the sheet based on the information of the sheet obtained by the obtaining unit and an elapsed time from a time when the sheet passes through the heating device.
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公开(公告)号：US20230130208A1
公开(公告)日：2023-04-27
申请号：US17965086
申请日：2022-10-13
Applicant: CANON KABUSHIKI KAISHA
Inventor： Hiroki Takano , Yuma Inui , Shingo Iwami , Yoshinao Chiba , Koji Suzuki , Yoshiya Numata
Abstract: A sheet conveyance apparatus includes a conveyance roller, an abutment member including an abutment surface, an obliquely conveying roller configured to convey the sheet such that the side edge portion is moved toward the abutment surface, a sheet side-edge detection portion, and a controller. The controller is configured to control the conveyance force of the obliquely conveying roller at a first conveyance force until a predetermined time has elapsed, in an abutment operation in which the sheet is abutted against the abutment surface by the obliquely conveying roller, and control the conveyance force of the obliquely conveying roller at a second conveyance force larger than the first conveyance force if the predetermined time has elapsed and the position of the side edge portion of the sheet detected by the sheet side-edge detection portion is out of a predetermined range.
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公开(公告)号：US20230078048A1
公开(公告)日：2023-03-16
申请号：US17931502
申请日：2022-09-12
Applicant: CANON KABUSHIKI KAISHA
Inventor： Koji Suzuki , Keisuke Mogi , Hisashi Tsukijima , Yuma Inui , Yoshiya Numata
Abstract: A calculation system includes an obtaining unit and a calculation unit. The obtaining unit obtains information of a sheet. The calculation unit calculates an amount of change in length of the sheet in a conveyance direction of the sheet heated by a heating device to fix a toner image to the sheet based on the information of the sheet obtained by the obtaining unit and an elapsed time from a time when the sheet passes through the heating device.
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公开(公告)号：US20220144571A1
公开(公告)日：2022-05-12
申请号：US17505812
申请日：2021-10-20
Applicant: CANON KABUSHIKI KAISHA
Inventor： Shingo Iwami , Yoshinao Chiba , Koji Suzuki , Yuma Inui , Yoshiya Numata
Abstract: A sheet conveyance apparatus includes a conveyance roller, an abutment member including an abutment surface against which a side edge, in a width direction, of the sheet abuts, and configured to correct a skew of the sheet, an obliquely conveying roller configured to convey the sheet such as the side edge of the sheet is conveyed toward the abutment surface, a sheet side edge detection portion configured to detect a position of the side edge of the sheet, and a control unit configured to control that a conveyance force, in the width direction, by the obliquely conveying roller in response to a detection result of the sheet side edge detection portion becomes smaller than that in an abutment movement.
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公开(公告)号：US20220100127A1
公开(公告)日：2022-03-31
申请号：US17460502
申请日：2021-08-30
Applicant: CANON KABUSHIKI KAISHA
Inventor： Yoshiya Numata , Kazuyuki Narita
IPC: G03G15/20
Abstract: An image forming apparatus includes a control unit that controls a conveyance velocity of conveying a recording medium by a fixing unit, to form a loop in the recording medium between a transfer nip portion and a fixing nip portion, in which the control unit controls the conveyance velocity to decrease the loop when a rear end of the recording medium reaches a first position that is apart upstream, in the conveyance direction, from a conveying nip portion of a conveying unit, by a distance that corresponds to a circumference length of a pressure-applying rotating member multiplied by an integer.
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