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    Image Forming Apparatus, Torque Rise Point Predicting Method, Computer Program, and Control System
    2.
    发明申请
    Image Forming Apparatus, Torque Rise Point Predicting Method, Computer Program, and Control System 审中-公开

    公开(公告)号：US20200159150A1

    公开(公告)日：2020-05-21

    申请号：US16689155

    申请日：2019-11-20

    申请人： Konica Minolta, Inc.

    发明人： Katsuhide SAKAI ,  Yasuhiro KOIDE ,  Toshiaki TANAKA ,  Akihiro HAYASHI

    IPC分类号： G03G15/20

    摘要： An image forming apparatus has a pad type fixing device in which a lubricant is interposed between a fixing belt for heating a sheet and a pad for holding the fixing belt, and includes: a controller that controls a heater of the fixing belt to maintain a fixing temperature to be set in accordance with printing modes, at a set temperature; an acquisitor that acquires torque of a motor for rotating the fixing belt as acquired torque for each of the set temperatures; a transition predictor that predicts transition of the torque of the motor for each of the set temperatures based on the acquired torque; and a point predictor that predicts a point at which at least two transition curves based on the predicted transition intersect each other as a torque rise point at which the torque of the motor starts rising due to a decrease in the lubricant.

    IMAGE FORMING DEVICE
    3.
    发明申请
    IMAGE FORMING DEVICE 审中-公开

    公开(公告)号：US20190227471A1

    公开(公告)日：2019-07-25

    申请号：US16243774

    申请日：2019-01-09

    申请人： KONICA MINOLTA, INC.

    发明人： Akihiro HAYASHI ,  Yuhei TATSUMOTO ,  Koji OHARA ,  Makoto SHIMAZOE ,  Yasuhiro KOIDE

    IPC分类号： G03G15/00

    摘要： An image forming device includes: a conductive roller that abuts the image carrier to rotate; a power supply circuit that applies voltage to the roller; a controller that controls the power supply circuit so as to apply the voltage to the roller over a predetermined detection period in a state in which the image carrier and the roller are rotated; a detection value acquirer that acquires a detection value acquired by the application of the voltage indicating a state of the image carrier in the detection period; and a state detector that detects a state of the image carrier on the basis of a plurality of acquired detection values, wherein a length of the detection period is set to a length at which both the numbers of rotations of the image carrier and the roller from a start of the detection period are integers.

    CONTROL METHOD FOR THREE-PHASE DC BRUSHLESS MOTOR, CONTROL DEVICE, AND IMAGE FORMING DEVICE
    4.
    发明申请
    CONTROL METHOD FOR THREE-PHASE DC BRUSHLESS MOTOR, CONTROL DEVICE, AND IMAGE FORMING DEVICE 有权
    三相直流无刷马达，控制装置和图像形成装置的控制方法

    公开(公告)号：US20160373034A1

    公开(公告)日：2016-12-22

    申请号：US15181633

    申请日：2016-06-14

    申请人： KONICA MINOLTA, INC.

    发明人： Yuta TACHIBANA ,  Katsuhide SAKAI ,  Yasuhiro KOIDE ,  Yuhei TATSUMOTO

    IPC分类号： H02P6/06 ,  H02P6/16 ,  G03G15/00 ,  H02P6/15 ,  H02P6/22

    CPC分类号： H02P6/15 ,  G03G15/5008 ,  G03G15/757 ,  G03G15/80 ,  H02P6/16 ,  H02P6/22

    摘要： A control method for a three-phase DC brushless motor including a rotor that includes a plurality of magnetic poles and that is rotatable, a stator that includes a plurality of magnetic field generation parts to generate a magnetic field to be a driving source of the rotor, and a sensor to detect a magnetic pole of the rotor which pole passes through a first position in the stator is provided, the method including: detecting in which the sensor detects a first magnetic pole of the rotor which pole passes through the first position; estimating, based on a result of the detection of the first magnetic pole, time until the first magnetic pole reaches a second position in the stator; and controlling the plurality of magnetic field generation parts in such a manner that a suitable magnetic field is generated when the first magnetic pole passes through the second position.

    摘要翻译： 一种用于三相DC无刷电动机的控制方法，包括具有多个磁极并且可旋转的转子，包括多个磁场产生部分的定子，以产生作为转子的驱动源的磁场 以及传感器，用于检测所述转子的磁极通过所述定子中的第一位置的磁极，所述方法包括：检测所述传感器检测所述转子的第一磁极通过所述第一位置; 基于第一磁极的检测结果，估计直到第一磁极到达定子中的第二位置的时间; 并且以这样的方式控制多个磁场产生部分，使得当第一磁极通过第二位置时产生合适的磁场。

    IMAGE FORMING APPARATUS
    7.
    发明申请
    IMAGE FORMING APPARATUS 有权
    图像形成装置

    公开(公告)号：US20160238962A1

    公开(公告)日：2016-08-18

    申请号：US15041613

    申请日：2016-02-11

    申请人： Konica Minolta, Inc.

    发明人： Yuhei TATSUMOTO ,  Katsuhide SAKAI ,  Yasuhiro KOIDE ,  Yuta TACHIBANA

    IPC分类号： G03G15/02 ,  G03G15/06

    CPC分类号： G03G15/0266 ,  G03G15/065

    摘要： An image forming apparatus includes: a photosensitive member rotated in a predetermined direction; a charging unit configured to charge a circumferential surface of the photosensitive member; a developing unit carrying a developer including toner and carriers, and including a developer bearing member configured to apply toner charged in a first polarity to the circumferential surface of the photosensitive member; a first voltage applying unit configured to apply a first voltage of the first polarity to the charging unit; a second voltage applying unit configured to apply a second voltage of the first polarity to the developer bearing member; a first voltage detecting unit configured to detect the first voltage; a second voltage detecting unit configured to detect the second voltage; and a controller, wherein the controller determines whether or not to make a second rate lower than a first rate according to the second voltage at a first timing.

    摘要翻译： 图像形成装置包括：沿预定方向旋转的感光构件; 充电单元，其构造成对感光构件的圆周表面充电; 携带包括调色剂和载体的显影剂的显影单元，并且包括构造成将以第一极性填充的调色剂施加到感光构件的圆周表面的显影剂承载构件; 第一电压施加单元，被配置为将第一极性的第一电压施加到充电单元; 第二电压施加单元，被配置为将第一极性的第二电压施加到显影剂承载部件; 第一电压检测单元，被配置为检测第一电压; 第二电压检测单元，被配置为检测第二电压; 以及控制器，其中，所述控制器在第一定时根据所述第二电压确定是否使比第一速率低的第二速率。

    IMAGE FORMING DEVICE
    8.
    发明申请
    IMAGE FORMING DEVICE 有权

    公开(公告)号：US20210356891A1

    公开(公告)日：2021-11-18

    申请号：US17315877

    申请日：2021-05-10

    申请人： KONICA MINOLTA, INC.

    发明人： Yasuhiro KOIDE ,  Yoshihito SASAMOTO ,  Makoto SHIMAZOE ,  Yuhei TATSUMOTO

    IPC分类号： G03G15/00

    摘要： An image forming device includes: a transfer unit transferring a toner image to a sheet; a resistance measurement member disposed on the upstream side in a sheet carriage direction of the transfer unit and for measuring resistance of the sheet; a charge elimination member disposed between the transfer unit and the resistance measurement member in the sheet carriage direction; a first voltage applying unit applying voltage for resistance measurement to the resistance measurement member; and a second voltage applying unit applying voltage of reverse bias of the voltage for resistance measurement to the charge elimination member. The width of a charge elimination region by the charge elimination member is wider than that of a charged region by the resistance measurement member in a direction perpendicular to the sheet carriage direction. The absolute value of the voltage for charge elimination is smaller than that of the voltage for resistance measurement.