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1. 发明授权

US09851658B2 Developing device and image forming apparatus 有权
公开(公告)号：US09851658B2
公开(公告)日：2017-12-26
申请号：US14931705
申请日：2015-11-03
申请人： Konica Minolta, Inc.
发明人： Yasuyuki Inada , Yu Mukobayashi , Yuusuke Mandai , Kanji Nakayama , Shinichi Yoshimoto , Junji Kanda
IPC分类号： G03G15/08
CPC分类号： G03G15/0891 , G03G15/0893
摘要： A developing device includes a developer carrying member and first and second conveyance members. The first conveyance member conveys a developer in a first direction through a first conveyance path to the developer carrying member. The second conveyance member conveys the developer in a second direction through a second conveyance path included in a circulation path along with the first conveyance path. The second conveyance member has a helical second screw around a second shaft. The second conveyance path includes a developer replenishing port and a developer discharge port. The second screw is approximately constant in diameter in a second section being a portion extending a predetermined distance from an end of the discharge port in the second direction when viewed in a top view. The second screw conveys the developer at a lower speed in the second section than on an upstream side with respect to the second section.

2. 发明申请

US20140169839A1 DEVELOPING DEVICE AND IMAGE FORMING APPARATUS 有权
标题翻译：开发设备和图像形成装置
公开(公告)号：US20140169839A1
公开(公告)日：2014-06-19
申请号：US14132120
申请日：2013-12-18
申请人： Konica Minolta, Inc.
发明人： Kanji Nakayama , Wataru Onoda , Hiroaki Takada
IPC分类号： G03G15/09
CPC分类号： G03G15/0921
摘要： A developing device having: a developing sleeve in which a magnetic member is inserted, transporting two-component developer to a developing area facing an image carrier; and a restriction member for restricting the amount of developer to be no greater than 250 g/m2. The average of absolute values of magnetic flux density within a restriction area falls within a range of 40 mT to 70 mT under a condition that no developer exists within the restriction area. The restriction area extends along the outer circumferential surface between a closest point on the outer circumferential surface, which is closest to the restriction member, and a point 2 mm upstream from the closest point in a rotational direction of the developing sleeve, and has a height that is half a minimum distance between the closest point and the restriction member.
摘要翻译：一种显影装置，具有：显影套筒，其中插入有磁性构件，将双组分显影剂输送到面向图像载体的显影区域; 以及用于限制显影剂量不大于250g / m 2的限制构件。在限制区域内没有显影剂的条件下，限制区域内的磁通密度的绝对值的平均值在40mT至70mT的范围内。所述限制区域沿着所述外周面的最接近所述限制构件的外周面的最近点与所述显影套筒的旋转方向最近点的上游2mm的点的外周面延伸，并且具有高度即最近点与限制构件之间的最小距离的一半。

3. 发明申请

US20160274488A1 DEVELOPING DEVICE AND IMAGE FORMING APPARATUS 有权
标题翻译：开发设备和图像形成装置
公开(公告)号：US20160274488A1
公开(公告)日：2016-09-22
申请号：US15063597
申请日：2016-03-08
申请人： Konica Minolta, Inc.
发明人： Yuusuke Mandai , Yasuyuki Inada , Yu Mukobayashi , Shinichi Yoshimoto , Junji Kanda , Kanji Nakayama
IPC分类号： G03G15/06
CPC分类号： G03G15/065 , G03G15/0907 , G03G2215/0132
摘要： There are provided a developing device comprising a developing roller to develop an image carrier by use of a two-component developer and a developing bias power source, and an image forming apparatus using the developing device. The developing device further includes a variable resistance unit provided on a bias apply path to apply a bias from the developing power source to the developing roller, and a resistance controller to control a resistance value of the variable resistance unit based on a charge amount signal indicating a toner's charge amount in a developer layer on the developing roller. The resistance controller provides a low mode to lower the resistance of the variable resistance unit and a high mode to enhance the resistance. The low mode is set if the toner charge amount is low, and the high mode is set if the toner charge amount is high.
摘要翻译：提供了一种显影装置，其包括使用双组分显影剂和显影偏压电源来显影图像载体的显影辊，以及使用该显影装置的图像形成装置。显影装置还包括设置在偏置施加路径上的可变电阻单元，用于将来自显影电源的偏压施加到显影辊，以及电阻控制器，用于基于指示的电荷量信号来控制可变电阻单元的电阻值调色剂在显影辊上的显影剂层中的电荷量。电阻控制器提供低模式以降低可变电阻单元的电阻和高模式以增强电阻。如果调色剂充电量低，则设置低模式，并且如果调色剂充电量高，则设置高模式。

4. 发明授权

US09841707B2 Image forming apparatus, control method, and control program in which a magnitude of a current to flow in a paper sheet at the time of toner image transfer can be set 有权
公开(公告)号：US09841707B2
公开(公告)日：2017-12-12
申请号：US15377413
申请日：2016-12-13
申请人： Konica Minolta, Inc.
发明人： Takahiro Kuroda , Kanji Nakayama , Kohei Hayashi , Tatsutoshi Yamada
IPC分类号： G03G15/16
CPC分类号： G03G15/1665 , G03G15/1605 , G03G15/1675 , G03G2215/0132
摘要： An image forming apparatus includes: an image carrier configured to carry a toner image; a transfer member configured to transfer the toner image onto a transfer target member by applying a transfer voltage of the opposite polarity of the polarity of the toner image to the transfer target member, the transfer member being in contact with the image carrier; an accepting unit configured to accept a setting for changing a preset current range to a new current range, the preset current range being defined by one of a lower limit of a current flowing in the transfer target member and an upper limit of the current; a sensing unit configured to sense a magnitude of the current flowing in the transfer target member; and a control device configured to control the transfer voltage so that the magnitude of the sensed current falls within the new current range.

5. 发明授权

US09753394B2 Image forming device, control method for image forming device, and control program for image forming device 有权
公开(公告)号：US09753394B2
公开(公告)日：2017-09-05
申请号：US15159195
申请日：2016-05-19
申请人： Konica Minolta, Inc.
发明人： Kanji Nakayama , Shinichi Yoshimoto , Junji Kanda , Yasuyuki Inada , Yuusuke Mandai , Yu Mukobayashi
IPC分类号： G03G15/02 , G03G15/06 , G03G21/14
CPC分类号： G03G15/0266 , G03G15/065 , G03G21/14
摘要： An image forming device includes: a charging unit configured to apply charging bias voltage to a charging member and charge a surface of an image carrying body; an exposure unit configured to expose the surface of the image carrying body, and form an electrostatic latent image; a developing unit configured to apply developing bias voltage to a developer carrying body, and develop the electrostatic latent image; and a control unit configured to control timing to start applying the developing bias voltage relative to timing to start applying the charging bias voltage, wherein the control unit performs control such that the larger an absolute value of the charging bias voltage is, the shorter an interval from timing to start applying the charging bias voltage to timing to start applying the developing bias voltage becomes, and such that the smaller the absolute value is, the longer the interval becomes.

6. 发明授权

US10005663B2 Method of manufacturing pattern substrate and method of locating component 有权
公开(公告)号：US10005663B2
公开(公告)日：2018-06-26
申请号：US14295753
申请日：2014-06-04
申请人： Konica Minolta, Inc.
发明人： Naoki Yamamoto , Kanji Nakayama , Keita Saito , Dai Suwama
IPC分类号： G03G15/20 , B81C3/00
CPC分类号： B81C3/005 , B81C2203/032 , H01L2224/95146
摘要： There is provided a method of manufacturing a pattern substrate in which a pattern is formed on the surface of the substrate. The manufacturing method includes a step of preparing the substrate and a step of arranging a liquid-repellent or lyophilic material on the surface of the substrate so as to form the pattern on the surface of the substrate in which the surface of the substrate has a liquid-repellent region and a lyophilic region, the pattern is formed by one of the liquid-repellent region and the lyophilic region and the pattern is used to locate a component by the surface tension of a liquid member.

7. 发明授权

US09891550B2 Developing device which can detect rotational position of developing roller 有权
公开(公告)号：US09891550B2
公开(公告)日：2018-02-13
申请号：US15292611
申请日：2016-10-13
申请人： Konica Minolta, Inc.
发明人： Yuusuke Mandai , Kazuya Kitamura , Masato Kimura , Kanji Nakayama
IPC分类号： G03G15/06 , G03G15/08
CPC分类号： G03G15/065 , G03G15/0849 , G03G15/0851 , G03G15/0893 , G03G2215/0132 , G03G2215/0838
摘要： A developing device is equipped with a developing roller rotationally driven for developing an electrostatic latent image formed on a surface of an image supporting body with toner, a screw rotationally driven of which a ratio of number of rotations to number of rotations of the developing roller being rotationally driven is constant, and a processor. The processor is configured to detect toner density in developer by using a sensor installed facing the screw, during rotationally drive of the screw, and detect information indicating a rotational position of the developing roller, based on ripples which occur in the toner density detected.

8. 发明授权

US10768558B2 Image formation apparatus 有权
公开(公告)号：US10768558B2
公开(公告)日：2020-09-08
申请号：US16012505
申请日：2018-06-19
申请人： Konica Minolta, Inc.
发明人： Yuusuke Mandai , Kanji Nakayama
IPC分类号： G03G15/16 , G03G15/00 , G03G21/14 , G03G15/06
摘要： An image formation apparatus includes a first electrode portion including a contact electrode and a counter electrode, a second electrode portion arranged as not being in contact with a recording medium, a first sensing unit configured to sense a first current which flows to the first electrode portion as a result of application of a voltage across the contact electrode and the counter electrode while the recording medium lies between the contact electrode and the counter electrode, a second sensing unit configured to sense a second current which flows from the charged recording medium to the second electrode portion, and a control unit. The control unit sets a transfer condition for transferring a toner image to the recording medium based on the first current sensed by the first sensing unit and the second current sensed by the second sensing unit.

9. 发明授权

US09599924B2 Developing device and image forming apparatus 有权
公开(公告)号：US09599924B2
公开(公告)日：2017-03-21
申请号：US15063597
申请日：2016-03-08
申请人： Konica Minolta, Inc.
发明人： Yuusuke Mandai , Yasuyuki Inada , Yu Mukobayashi , Shinichi Yoshimoto , Junji Kanda , Kanji Nakayama
IPC分类号： G03G15/09 , G03G15/06
CPC分类号： G03G15/065 , G03G15/0907 , G03G2215/0132
摘要： There are provided a developing device including a developing roller to develop an image carrier by use of a two-component developer and a developing bias power source, and an image forming apparatus using the developing device. The developing device further includes a variable resistance unit provided on a bias apply path to apply a bias from the developing power source to the developing roller, and a resistance controller to control a resistance value of the variable resistance unit based on a charge amount signal indicating a toner's charge amount in a developer layer on the developing roller. The resistance controller provides a low mode to lower the resistance of the variable resistance unit and a high mode to enhance the resistance. The low mode is set if the toner charge amount is low, and the high mode is set if the toner charge amount is high.

10. 发明授权

US09057988B2 Developing device and image forming apparatus 有权
标题翻译：显影装置和图像形成装置
公开(公告)号：US09057988B2
公开(公告)日：2015-06-16
申请号：US14132120
申请日：2013-12-18
申请人： Konica Minolta, Inc.
发明人： Kanji Nakayama , Wataru Onoda , Hiroaki Takada
IPC分类号： G03G15/09
CPC分类号： G03G15/0921
摘要： A developing device having: a developing sleeve in which a magnetic member is inserted, transporting two-component developer to a developing area facing an image carrier; and a restriction member for restricting the amount of developer to be no greater than 250 g/m2. The average of absolute values of magnetic flux density within a restriction area falls within a range of 40 mT to 70 mT under a condition that no developer exists within the restriction area. The restriction area extends along the outer circumferential surface between a closest point on the outer circumferential surface, which is closest to the restriction member, and a point 2 mm upstream from the closest point in a rotational direction of the developing sleeve, and has a height that is half a minimum distance between the closest point and the restriction member.
摘要翻译：一种显影装置，具有：显影套筒，其中插入有磁性构件，将双组分显影剂输送到面向图像载体的显影区域; 以及用于限制显影剂量不大于250g / m 2的限制构件。在限制区域内没有显影剂的条件下，限制区域内的磁通密度的绝对值的平均值在40mT至70mT的范围内。所述限制区域沿着所述外周面的最接近所述限制构件的外周面的最近点与所述显影套筒的旋转方向最近点的上游2mm的点的外周面延伸，并且具有高度即最近点与限制构件之间的最小距离的一半。

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