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1.发明授权Image forming apparatus for controlling a steering operation of an intermediate transfer belt 有权用于控制中间转印带的转向操作的图像形成装置公开(公告)号：US09207584B2
公开(公告)日：2015-12-08
申请号：US14035575
申请日：2013-09-24
Applicant: KONICA MINOLTA, INC.
Inventor： Yumiko Izumiya , Satoshi Ogata , Jun Onishi
CPC classification number: G03G15/1615 , G03G2215/00156
Abstract: An improved image forming apparatus is described which can inhibit the quality of printed images from being degraded. A control unit performs a steering operation to shift an intermediate transfer belt toward a target belt position by controlling the inclination angle of a steering roller. Also, a memory stores the inclination angle of the steering roller in association with the operational states of rotary members facing the intermediate transfer belt. The control unit updates the values stored in the memory with an update value. When the result of detecting the belt edges indicate that the intermediate transfer belt falls in a predetermined range around the target belt position during the steering operation, the control unit determines the update value on the basis of the steering duration time and the inclination angle of the steering roller.
Abstract translation: 描述了可以抑制打印图像的质量劣化的改进的图像形成装置。 控制单元执行转向操作以通过控制转向辊的倾斜角度将中间转印带朝向目标带位置移动。 此外，存储器存储与面向中间转印带的旋转构件的操作状态相关联的转向辊的倾斜角度。 控制单元用更新值更新存储在存储器中的值。 当检测到皮带边缘的结果指示在转向操作期间中间转印带落在目标皮带位置周围的预定范围内时，控制单元基于转向持续时间和倾斜角度来确定更新值 转向辊。
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公开(公告)号：US10161478B2
公开(公告)日：2018-12-25
申请号：US15420177
申请日：2017-01-31
Applicant: Konica Minolta, Inc.
Inventor： Masahito Takano , Jun Onishi , Takashi Fujiwara
Abstract: A driving device includes: a first driving source; a second driving source; a first gear to which a driving force is transmitted from the first driving source; a second gear to which a driving force is transmitted from the second driving source; a third gear that engages with the first gear and the second gear; and a fixation shaft that pivotally supports the third gear, the fixation shaft being disposed such that a center of the fixation shaft, a rotation center of the first gear and a rotation center of the second gear are disposed on a straight line in which the fixation shaft is provided through the third gear; and a hole having a diameter for compensating eccentricity of the first gear, the second gear and the third gear is formed in the third gear.
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公开(公告)号：US10025253B2
公开(公告)日：2018-07-17
申请号：US15054577
申请日：2016-02-26
Applicant: KONICA MINOLTA, INC.
Inventor： Takashi Fujiwara , Jun Onishi , Masahito Takano
Abstract: An image forming apparatus includes: a first roller having an elastic part; a second roller configured to form a nip between the first roller and the second roller; a holding member configured to hold the second roller; and a control section configured to control the position of the holding member such that the center distance between the first roller and the second roller is maintained at a constant value when a sheet passes through the nip.
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公开(公告)号：US20140086596A1
公开(公告)日：2014-03-27
申请号：US14035575
申请日：2013-09-24
Applicant: KONICA MINOLTA, INC.
Inventor： Yumiko IZUMIYA , Satoshi Ogata , Jun Onishi
CPC classification number: G03G15/1615 , G03G2215/00156
Abstract: An improved image forming apparatus is described which can inhibit the quality of printed images from being degraded. A control unit performs a steering operation to shift an intermediate transfer belt toward a target belt position by controlling the inclination angle of a steering roller. Also, a memory stores the inclination angle of the steering roller in association with the operational states of rotary members facing the intermediate transfer belt. The control unit updates the values stored in the memory with an update value. When the result of detecting the belt edges indicate that the intermediate transfer belt falls in a predetermined range around the target belt position during the steering operation, the control unit determines the update value on the basis of the steering duration time and the inclination angle of the steering roller.
Abstract translation: 描述了可以抑制打印图像的质量劣化的改进的图像形成装置。 控制单元执行转向操作以通过控制转向辊的倾斜角度将中间转印带朝向目标带位置移动。 此外，存储器存储与面向中间转印带的旋转构件的操作状态相关联的转向辊的倾斜角度。 控制单元用更新值更新存储在存储器中的值。 当检测到皮带边缘的结果指示在转向操作期间中间转印带落在目标皮带位置周围的预定范围内时，控制单元基于转向持续时间和倾斜角度确定更新值 转向辊。
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公开(公告)号：US09939759B2
公开(公告)日：2018-04-10
申请号：US15287238
申请日：2016-10-06
Applicant: KONICA MINOLTA, INC.
Inventor： Jun Onishi , Masahito Takano , Takashi Fujiwara
IPC: G03G15/16
CPC classification number: G03G15/1615 , G03G2215/0129
Abstract: A belt tension adjustment mechanism provided on an inner side of an endless intermediate transfer belt and applying a tension to the intermediate transfer belt being rotated when a toner image is transferred on the intermediate transfer belt, said belt tension adjustment mechanism includes a holder having an opening section at one surface thereof; and an elastic member contained to be fixed in the holder while being compressed in a running direction of the intermediate transfer belt and having a convex section, wherein the convex section protrudes from the opening section of the holder toward a direction orthogonal to an image transfer surface of the intermediate transfer belt and is in direct contact with the intermediate transfer belt.
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Patent Agency Ranking
公开(公告)号：US20170082953A1
公开(公告)日：2017-03-23
申请号：US15267761
申请日：2016-09-16
Applicant: Konica Minolta, Inc.
Inventor： Satoshi Ogata , Yumiko Izumiya , Jun Onishi
IPC: G03G15/00
CPC classification number: G03G21/0005 , G03G15/1615 , G03G15/5008 , G03G15/505 , G03G2215/00075
Abstract: An image forming apparatus includes an image carrier, an image carrier driver which rotates the image carrier, a rotation detector which detects rotation of the image carrier, a rotary member in contact with the image carrier, a rotary member driver which rotates the rotary member, a first controller which controls the rotary member driver, and a second controller. The second controller controls the image carrier driver based on an output of the rotation detector and also controls the image carrier driver in a manner which attenuates a fluctuation component at a specific frequency. When the first controller changes a surface velocity of the rotary member, the second controller controls the image carrier driver in a manner that attenuates a fluctuation component at a specific frequency related to the changed surface velocity of the rotary member.
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公开(公告)号：US10459378B2
公开(公告)日：2019-10-29
申请号：US15964141
申请日：2018-04-27
Applicant: KONICA MINOLTA, INC.
Inventor： Takashi Fujiwara , Jun Onishi , Masahito Takano
Abstract: An image forming apparatus includes: a driving roller that conveys a paper sheet; a detector that detects a desired point on the driving roller; and a hardware processor that: acquires a waveform signal indicating one of a change in an image forming position with respect to the paper sheet and a change in a sheet conveyance velocity; extracts a synchronous waveform signal from the waveform signal acquired by the hardware processor, the synchronous waveform signal being synchronized with one revolution of the driving roller, the one revolution being detected by the detector; and inputs a drive signal to a drive source of the driving roller, the drive signal being input to weaken an amplitude of the synchronous waveform signal extracted by the hardware processor.
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公开(公告)号：US10359717B2
公开(公告)日：2019-07-23
申请号：US15916810
申请日：2018-03-09
Applicant: Konica Minolta, Inc.
Inventor： Masahito Takano , Jun Onishi , Takashi Fujiwara
Abstract: An image forming apparatus includes: a photosensitive drum; a driving roller that drives a transfer member; a facing roller facing the driving roller; a driver that drives one of the photosensitive drum, the driving roller, and the facing roller; and a hardware processor that: acquires carry-in fluctuation information of speed fluctuation of any one of the photosensitive drum, the driving roller, and the facing roller when a sheet member is carried into the transfer member; detects carry-in fluctuation timing of the speed fluctuation of any one of the photosensitive drum, the driving roller, and the facing roller that occurs when the sheet member is carried into the transfer member; predicts carry-out fluctuation timing of speed fluctuation of any one of the photosensitive drum, the driving roller, and the facing roller that occurs when the sheet member is carried from the transfer member; and performs feedforward control on the driver.
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公开(公告)号：US09914604B2
公开(公告)日：2018-03-13
申请号：US15334960
申请日：2016-10-26
Applicant: Konica Minolta, Inc.
Inventor： Takashi Fujiwara , Jun Onishi , Masahito Takano
CPC classification number: B65H3/02 , B65H1/04 , B65H3/047 , B65H3/126 , B65H3/128 , B65H3/48 , B65H3/56 , B65H3/60 , B65H2403/512 , B65H2404/52131 , B65H2404/563 , B65H2405/1134 , G03G15/6511 , G03G15/6529
Abstract: A sheet feeder device includes: a sheet feed tray configured to store a sheet stack formed with a plurality of paper sheets; an elastic member capable of expanding and contracting; a contact mechanism configured to bring the elastic member into contact with an edge of the sheet stack; an expansion mechanism configured to expand the elastic member in a direction of stacking of the paper sheets; and a control unit configured to cause the expansion mechanism to expand the elastic member while the elastic member is kept in contact with the edge of the sheet stack by the contact mechanism.
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10.发明授权公开(公告)号：US10042313B2
公开(公告)日：2018-08-07
申请号：US15267761
申请日：2016-09-16
Applicant: Konica Minolta, Inc.
Inventor： Satoshi Ogata , Yumiko Izumiya , Jun Onishi
Abstract: An image forming apparatus includes an image carrier, an image carrier driver which rotates the image carrier, a rotation detector which detects rotation of the image carrier, a rotary member in contact with the image carrier, a rotary member driver which rotates the rotary member, a first controller which controls the rotary member driver, and a second controller. The second controller controls the image carrier driver based on an output of the rotation detector and also controls the image carrier driver in a manner which attenuates a fluctuation component at a specific frequency. When the first controller changes a surface velocity of the rotary member, the second controller controls the image carrier driver in a manner that attenuates a fluctuation component at a specific frequency related to the changed surface velocity of the rotary member.
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