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1. 发明授权

US10161478B2 Driving device, fixing device and image forming apparatus 有权
公开(公告)号：US10161478B2
公开(公告)日：2018-12-25
申请号：US15420177
申请日：2017-01-31
申请人： Konica Minolta, Inc.
发明人： Masahito Takano , Jun Onishi , Takashi Fujiwara
IPC分类号： F16H1/22 , F16H35/00 , G03G15/20 , G03G21/16
摘要： 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.

2. 发明授权

US10025253B2 Image forming apparatus 有权
公开(公告)号：US10025253B2
公开(公告)日：2018-07-17
申请号：US15054577
申请日：2016-02-26
申请人： KONICA MINOLTA, INC.
发明人： Takashi Fujiwara , Jun Onishi , Masahito Takano
IPC分类号： G03G15/16 , G03G15/00
摘要： 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.

3. 发明申请

US20140086596A1 IMAGE FORMING APPARATUS 有权
标题翻译：图像形成装置
公开(公告)号：US20140086596A1
公开(公告)日：2014-03-27
申请号：US14035575
申请日：2013-09-24
申请人： KONICA MINOLTA, INC.
发明人： Yumiko IZUMIYA , Satoshi Ogata , Jun Onishi
IPC分类号： G03G15/01 , G03G15/16
CPC分类号： G03G15/1615 , G03G2215/00156
摘要： 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.
摘要翻译：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。

4. 发明授权

US10627747B2 Image forming apparatus and image forming program for reducing occurrences of color misregistration and density unevenness using fluctuation pattern of difference values 有权
公开(公告)号：US10627747B2
公开(公告)日：2020-04-21
申请号：US16265100
申请日：2019-02-01
申请人： Konica Minolta, Inc.
发明人： Jun Onishi , Masahito Takano , Takashi Fujiwara
IPC分类号： G03G15/16
CPC分类号： G03G15/1615
摘要： An image forming apparatus includes: a hardware processor that performs feedforward control on a motor; a driving roller that drives an intermediate transfer belt for transferring a toner image; a drive transmission system that transmits a driving force of the motor; a first detector that detects a speed of a driving shaft of the motor; a second detector that detects a speed of a driving shaft of the drive transmission system; and a storage that stores a plurality of sets of control data having different conformity states, wherein the plurality of sets of control data include pairs of a feedforward operation pattern and a drive transmission system deformation pattern, the drive transmission system deformation pattern corresponds to a fluctuation pattern of difference values, and the hardware processor compares the fluctuation pattern of difference values with the plurality of sets of control data.

5. 发明授权

US09207584B2 Image forming apparatus for controlling a steering operation of an intermediate transfer belt 有权
标题翻译：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
申请人： KONICA MINOLTA, INC.
发明人： Yumiko Izumiya , Satoshi Ogata , Jun Onishi
IPC分类号： G03G15/01 , G03G15/16
CPC分类号： G03G15/1615 , G03G2215/00156
摘要： 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.
摘要翻译：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。

6. 发明授权

US10459378B2 Image forming apparatus and program compensating for eccentric components 有权
公开(公告)号：US10459378B2
公开(公告)日：2019-10-29
申请号：US15964141
申请日：2018-04-27
申请人： KONICA MINOLTA, INC.
发明人： Takashi Fujiwara , Jun Onishi , Masahito Takano
IPC分类号： G03G15/20 , G03G15/00 , G03G15/16 , H04N1/56 , H04N1/50
摘要： 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.

7. 发明授权

US10359717B2 Image forming apparatus and correction of speed fluctuation of a sheet member through the image formatting apparatus 有权
公开(公告)号：US10359717B2
公开(公告)日：2019-07-23
申请号：US15916810
申请日：2018-03-09
申请人： Konica Minolta, Inc.
发明人： Masahito Takano , Jun Onishi , Takashi Fujiwara
IPC分类号： G03G15/00 , G03G15/16
摘要： 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.

8. 发明授权

US09914604B2 Sheet feeder device and image forming apparatus 有权
公开(公告)号：US09914604B2
公开(公告)日：2018-03-13
申请号：US15334960
申请日：2016-10-26
申请人： Konica Minolta, Inc.
发明人： Takashi Fujiwara , Jun Onishi , Masahito Takano
IPC分类号： B65H3/02 , B65H3/12 , B65H1/04 , B65H3/04 , B65H3/48 , G03G15/00 , B65H3/56 , B65H3/60
CPC分类号： 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
摘要： 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.

9. 发明授权

US10488802B2 Image forming apparatus 有权
公开(公告)号：US10488802B2
公开(公告)日：2019-11-26
申请号：US16182936
申请日：2018-11-07
申请人： KONICA MINOLTA, INC.
发明人： Masahito Takano , Jun Onishi , Takashi Fujiwara
IPC分类号： G03G15/00 , G03G15/16
CPC分类号： G03G15/505 , G03G15/1615 , G03G15/5054
摘要： An image forming apparatus including: a photoreceptor drum; an intermediate transfer belt; a primary transferer; a secondary transferer, and a hardware processor which suppresses speed change of the intermediate transfer belt at a timing of the sheet entering the secondary transferer and at a timing of the sheet being ejected from the secondary transferer, wherein the hardware processor calculates speed changes of the intermediate transfer belt and the photoreceptor drum at the timing of the sheet entering the secondary transferer and at the timing of the sheet being ejected from the secondary transferer, and calculates a transmission rate between the intermediate transfer belt and the photoreceptor drum based on the calculated speed changes, and the hardware processor adjusts an operation amount of the driving roller based on the calculated transmission rate.

10. 发明授权

US09939759B2 Belt tension adjustment mechanism and image forming apparatus 有权
公开(公告)号：US09939759B2
公开(公告)日：2018-04-10
申请号：US15287238
申请日：2016-10-06
申请人： KONICA MINOLTA, INC.
发明人： Jun Onishi , Masahito Takano , Takashi Fujiwara
IPC分类号： G03G15/16
CPC分类号： G03G15/1615 , G03G2215/0129
摘要： 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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