公开(公告)号：US20230375955A1

公开(公告)日：2023-11-23

申请号：US18318255

申请日：2023-05-16

申请人： CANON KABUSHIKI KAISHA

发明人： CHIKARA IMAIZUMI

IPC分类号： G03G15/01 ,  G03G15/00 ,  G03G15/16 ,  G03G15/02

CPC分类号： G03G15/0189 ,  G03G15/5008 ,  G03G15/1605 ,  G03G15/0136 ,  G03G15/0283 ,  G03G2215/0067

摘要： An image forming apparatus includes an image bearing member, a belt, a contact member, a rotation shaft member, a cam, an opposing member, and a damper. The belt receives a toner image from the image bearing member. The cam rotates in tandem with the rotation shaft member and contacts or separates the contact member and the belt. The opposing member is disposed to face the rotation shaft member in a direction intersecting with a rotation shaft member shaft direction. The damper member has a first flexible portion and a second flexible portion that are elastically deformable by contacting with the opposing member. In either contact operation or separation operation of the contact member to/from the belt, the damper member rotates in tandem with rotation of the rotation shaft member so that both the first flexible portion and the second flexible portion contact with the opposing member and are elastically deformed.

公开(公告)号：US20230145679A1

公开(公告)日：2023-05-11

申请号：US17979934

申请日：2022-11-03

申请人： CANON KABUSHIKI KAISHA

发明人： Shohei Okumura ,  Shinya Suzuki ,  Masahiro Tsujibayashi

IPC分类号： G03G15/02 ,  G03G15/00

CPC分类号： G03G15/0283 ,  G03G15/5037 ,  G03G15/5041 ,  G03G2215/00037 ,  G03G2215/0164

摘要： An image forming apparatus is configured to control a generation circuit to modulate a DC component of a developing voltage based on a first correction component such that a density unevenness is reduced. The image forming apparatus is further configured to restrict the first correction component for modulating the DC component of the developing voltage such that fogging of toner that may occur on a non-exposure region which is not exposed by an exposure unit and adhesion to a photosensitive member of carrier included in a developer are reduced.

公开(公告)号：US10078287B2

公开(公告)日：2018-09-18

申请号：US15109379

申请日：2015-12-02

申请人： CANON FINETECH INC.

发明人： Yuki Nagahashi

IPC分类号： G03G15/02

CPC分类号： G03G15/0266 ,  G03G15/0283

摘要： Provided is an image forming apparatus capable of appropriately setting a range of a charging voltage for electrically charging an image bearing member. A charging roller (2) and a charging power source (S1) are configured to apply a voltage between the charging roller (2) and a photosensitive drum (1) to electrically charge the photosensitive drum (1). A control circuit (13) is configured to set a voltage for obtaining a predetermined discharge current by the charging roller (2) with the photosensitive drum (1). The control circuit (13) is configured to determine, depending on a state of a resistance acting on an electric current flowing between the charging roller (2) and the photosensitive drum (1), at least one of an upper limit or a lower limit of the voltage set by the control circuit (13).

公开(公告)号：US10036974B2

公开(公告)日：2018-07-31

申请号：US15428240

申请日：2017-02-09

申请人： Shinji Minami

发明人： Shinji Minami

IPC分类号： G03G15/02 ,  G03G15/16

CPC分类号： G03G15/0266 ,  G03G15/0283 ,  G03G15/1665 ,  G03G15/1675

摘要： An image forming apparatus includes a photoconductor, a charger that charges the photoconductor, a transfer unit that transfers a toner image formed on the photoconductor to a transfer device, a charging power supply that outputs AC voltage for applying a charging bias to the charger, a transfer power supply that outputs DC voltage or DC current for applying a transfer bias to the transfer unit, an output detector that detects an output value of the DC voltage or the DC current, and a controller that calculates load impedance of the photoconductor based on the detected output value of the DC voltage or DC current detected by the output detector while modifying the output of the AC voltage by the charging power supply and sets the output of the AC voltage that the load impedance starts converging into a predetermined value as an adjusted AC output to the charging power supply.

公开(公告)号：US09904200B2

公开(公告)日：2018-02-27

申请号：US15226680

申请日：2016-08-02

申请人： CANON KABUSHIKI KAISHA

发明人： Hiroyuki Kidaka

IPC分类号： G03G15/02

CPC分类号： G03G15/0266 ,  G03G15/0283

摘要： An image forming apparatus includes an image-bearing member, which is charged by a charge voltage in which direct and alternating-current voltages are superposed on each other. A toner image is formed on the charged image-bearing member. A current flowing through the charging member is detected when the charge voltage is applied to the charging member. A current, in a frequency band including a discharge current component, is extracted from the detected current. The alternating-current voltage is adjusted based on the current extracted by an extraction unit. Environmental information is acquired. Based on the environmental information acquired by an acquisition unit, a frequency band for extraction performed by the extraction unit is set.

公开(公告)号：US09651892B2

公开(公告)日：2017-05-16

申请号：US14270486

申请日：2014-05-06

申请人： Konica Minolta, Inc.

发明人： Atsuto Hirai

IPC分类号： G03G15/10 ,  G03G15/06 ,  G03G15/02 ,  G03G15/00

CPC分类号： G03G15/065 ,  G03G15/0266 ,  G03G15/0283 ,  G03G15/105 ,  G03G15/5033

摘要： A supply member of this wet type image forming apparatus has a surface rotating in a direction the same as a surface of a developer carrier at the same peripheral velocity at a portion abutting to the developer carrier. A control unit causes toner particles on the supply member to move to the developer carrier by providing a potential difference between the developer carrier and the supply member and controls an amount of toner particles on a latent image carrier by controlling electric power of a first charging member.

公开(公告)号：US09606470B2

公开(公告)日：2017-03-28

申请号：US14996856

申请日：2016-01-15

申请人： CANON KABUSHIKI KAISHA

发明人： Shota Soda

IPC分类号： G03G15/02 ,  G03G15/00 ,  G03G21/08

CPC分类号： G03G15/0283 ,  G03G15/80 ,  G03G21/08

摘要： When attachment of an unused photoconductor unit is detected, a mode is executed in which, during non-image formation, a first current flowing in a charging roller is detected when a photoconductor is re-charged without irradiation of light by a pre-exposure device after being charged and passing through a transfer position during non-image formation, and a second current flowing in the charging roller is detected when the photoconductor is re-charged with irradiation of light by the pre-exposure device after being charged and passing through the transfer position, and a current supplied to an LED lamp during image formation is controlled in accordance with detection results.

公开(公告)号：US09535357B2

公开(公告)日：2017-01-03

申请号：US15133964

申请日：2016-04-20

申请人： KYOCERA Document Solutions Inc.

发明人： Takahiro Okubo

IPC分类号： G03G15/02

CPC分类号： G03G15/0283 ,  G03G15/0216 ,  G03G15/0266 ,  G03G15/065

摘要： An image forming apparatus has an image carrier, a charger, a developing device, a voltage application unit, and a controller. The developing device includes a developing roller. The voltage application unit applies a voltage to the developing roller and to the charger. The controller controls the voltage application unit. The controller controls the voltage application unit such that a developing bias having an AC voltage superposed on a DC voltage is applied to the developing roller and a charging bias including at least a DC voltage and having superposed thereon a compensation AC voltage with an opposite phase to an AC voltage induced in the charger by the developing bias is applied to the charger.

摘要翻译： 图像形成装置具有图像载体，充电器，显影装置，电压施加单元和控制器。 显影装置包括显影辊。 电压施加单元向显影辊和充电器施加电压。 控制器控制电压施加单元。 控制器控制电压施加单元，使得具有叠加在DC电压上的AC电压的显影偏压被施加到显影辊，并且包括至少包括DC电压并且在其上叠加有相反相位的补偿AC电压的充电偏压 通过显影偏压在充电器中感应的AC电压被施加到充电器。

公开(公告)号：US20160378014A1

公开(公告)日：2016-12-29

申请号：US14921505

申请日：2015-10-23

申请人： FUJI XEROX CO., LTD.

发明人： Yuta HOSHINO

IPC分类号： G03G15/02

CPC分类号： G03G15/0283 ,  G03G15/0216 ,  G03G15/0233

摘要： A power supply structure includes a bearing, a first spring, and a second spring. The bearing supports a rotary member that axially rotates while contacting with a contact target. While receiving power, the first spring contacts with and presses the bearing with an end portion of the first spring to bring the rotary member into contact with the contact target. The second spring extends from the first spring toward the contact target and contacts with the rotary member.

摘要翻译： 电源结构包括轴承，第一弹簧和第二弹簧。 轴承支承与接触目标物接触时轴向旋转的旋转部件。 在接收动力的同时，第一弹簧与第一弹簧的端部接触并按压轴承，以使旋转构件与接触靶接触。 第二弹簧从第一弹簧向接触目标延伸，并与旋转部件接触。

公开(公告)号：US20160161878A1

公开(公告)日：2016-06-09

申请号：US14953602

申请日：2015-11-30

申请人： CANON KABUSHIKI KAISHA

发明人： Kenichiro Kitajima

IPC分类号： G03G15/02

CPC分类号： G03G15/0266 ,  G03G13/02 ,  G03G15/0283 ,  G03G15/0291 ,  G03G2215/026 ,  G03G2215/027

摘要： An image forming apparatus includes a rotatable photosensitive member (drum), a first corona charger, a second corona charger, an image forming portion, a voltage applying portion, a surface potential detecting portion, a controller. The controller determines a condition of voltages applied to the first and second corona chargers during image formation, by setting a first voltage condition for the first corona charger so that the surface potential of the drum is a second potential lower in absolute value than the first potential in a state in which the first corona charger operates, and the second corona charger does not operates, and then by setting a second voltage condition for the second corona charger so that the surface potential of the drum is the first potential in a state in which the first corona charger operates under the first voltage condition, and the second corona charger operates.

摘要翻译： 图像形成装置包括可旋转的感光部件（鼓），第一电晕充电器，第二电晕充电器，图像形成部分，电压施加部分，表面电位检测部分，控制器。 控制器通过设置第一电晕充电器的第一电压条件来确定在图像形成期间施加到第一和第二电晕充电器的电压的条件，使得滚筒的表面电位具有比第一电位的绝对值更低的第二电位 在第一电晕充电器工作的状态下，第二电晕充电器不工作，然后通过设定第二电晕充电器的第二电压条件使得鼓的表面电位为第一电位，其中， 第一电晕充电器在第一电压条件下工作，第二电晕充电器工作。