公开(公告)号：US20200057401A1

公开(公告)日：2020-02-20

申请号：US16536338

申请日：2019-08-09

Applicant: CANON KABUSHIKI KAISHA

Inventor： Tadashi Fukuda ,  Takahito Fuse ,  Masami Hano ,  Shota Soda

IPC: G03G15/02 ,  G03G21/20

Abstract: An image forming apparatus includes a photosensitive member, a first charging roller, a first cleaning member, a second charging roller, and a second cleaning member. The relationship is satisfied (X×L0+L1+L2)−(Y×L3+L4)≠0 where L0 represents a length of a whole circumference of the first charging roller, L1 represents a length between the first contact area and the first contact position of the first charging roller and the photosensitive member, L3 represents a length of a whole circumference of the second charging roller, L4 represents a length between the second contact area and the second contact position, L2 represents a length between the first contact position and the second contact position, X represents an integer in a range of 0≤X≤40, and Y represents an integer in a range of 0≤Y≤40.

公开(公告)号：US09436118B2

公开(公告)日：2016-09-06

申请号：US14559106

申请日：2014-12-03

Applicant: CANON KABUSHIKI KAISHA

Inventor： Tadashi Fukuda

IPC: G03G15/06 ,  G03G15/02

CPC classification number: G03G15/0291 ,  G03G15/065

Abstract: A first mode in which a toner image is formed on a surface of a photoconductor by forming an electrostatic latent image with exposure means and a second mode in which a toner image used to adjust a tilt of a corona charger relative to the surface of the photoconductor in a longitudinal direction of the corona charger is output substantially without forming an electrostatic latent image with the exposure means are executable. An oscillating voltage superimposed in a developing bias in the second mode is set such that an amount of change in density of the toner image relative to an amount of change in developing contrast within a predetermined range of the density of the toner image becomes larger for the developing bias used in the second mode than for the developing bias used in the first mode.

Abstract translation: 其中通过用曝光装置形成静电潜像而在感光体的表面上形成调色剂图像的第一模式和第二模式，其中用于调节电晕充电器相对于感光体表面的倾斜的调色剂图像 在电晕充电器的纵向方向基本上输出而不形成静电潜像，而曝光装置可执行。 设定叠加在第二模式的显影偏压中的振荡电压，使得调色剂图像的浓度相对于显影对比度的变化量在调色剂图像的浓度的预定范围内变化的量变大 在第二模式中使用的显影偏压比在第一模式中使用的显影偏压。

公开(公告)号：US09383700B2

公开(公告)日：2016-07-05

申请号：US14672051

申请日：2015-03-27

Applicant: CANON KABUSHIKI KAISHA

Inventor： Nobuhiro Tani ,  Tomoharu Kitajima ,  Tadashi Fukuda

IPC: G03G15/01 ,  G03G15/00 ,  G03G15/08

CPC classification number: G03G15/50 ,  G03G15/01 ,  G03G15/0849 ,  G03G15/0855 ,  G03G15/5033 ,  G03G15/5054 ,  G03G2215/00042

Abstract: An image forming apparatus including a movable image bearing member, a sensor arranged so as to oppose the image bearing member, a shutter member movable between an opened position and a closed position, a vibration mechanism configured to apply vibration to the shutter member, and an executing portion configured to execute a vibrating action which applies vibrations to the shutter member by the vibration device based on image formation history information.

Abstract translation: 一种图像形成装置，包括可移动图像承载部件，布置成与图像承载部件相对的传感器，可在打开位置和关闭位置之间移动的挡板部件，被构造成对挡板部件施加振动的振动机构， 所述执行部被配置为执行基于图像形成历史信息通过所述振动装置对所述挡板部件施加振动的振动动作。

公开(公告)号：US09110431B2

公开(公告)日：2015-08-18

申请号：US13975773

申请日：2013-08-26

Applicant: CANON KABUSHIKI KAISHA

Inventor： Tadashi Fukuda

IPC: G03G21/00 ,  G03G15/02

CPC classification number: G03G21/0011 ,  G03G15/0291 ,  G03G21/0005 ,  G03G2221/0015 ,  G03G2221/0042

Abstract: An image forming apparatus includes a charger having a case surrounding a discharge electrode, an opening on the photosensitive member side and a grid disposed in the opening and having a mesh area, a shutter that covers the opening, and first and second contact members. The contact members are disposed on a downstream side of the charger and an upstream side of a cleaning blade in a rotational direction of the photosensitive member and come in contact with areas of the photosensitive member corresponding to both longitudinal ends of the mesh area of the grid.

Abstract translation: 图像形成装置包括充电器，其具有围绕放电电极的壳体，感光构件侧上的开口和布置在开口中的网格，并且具有网眼区域，覆盖开口的快门以及第一和第二接触构件。 接触构件设置在充电器的下游侧，并且在感光构件的旋转方向上设置有清洁刮板的上游侧，并且与感光构件的与网格的网格区域的两个纵向端部对应的区域接触 。

公开(公告)号：US20140064811A1

公开(公告)日：2014-03-06

申请号：US13975773

申请日：2013-08-26

Applicant: CANON KABUSHIKI KAISHA

Inventor： Tadashi Fukuda

IPC: G03G21/00

CPC classification number: G03G21/0011 ,  G03G15/0291 ,  G03G21/0005 ,  G03G2221/0015 ,  G03G2221/0042

Abstract: The present invention provides an image forming apparatus including a charger that includes a case surrounding the discharge electrode and having an opening on the photosensitive member side and a grid disposed in the opening and having a mesh area, a shutter that includes the fiber opening and closing the opening, and first and second contact members that are disposed on a downstream of the charger and an upstream of the cleaning blade in a rotational direction of the photosensitive member and come in contact with areas of the photosensitive member corresponding to both longitudinal ends of the mesh area of the grid.

Abstract translation: 本发明提供了一种图像形成装置，其包括充电器，该充电器包括围绕放电电极并且在感光元件侧上具有开口的壳体和设置在开口中的具有网眼区域的栅格，包括光纤开合的快门 所述开口以及设置在所述充电器的下游且在所述感光构件的旋转方向上的所述清洁刮板的上游并且与所述感光构件的两个纵向端部对应的感光构件的区域接触的第一和第二接触构件 网格的网格区域。

公开(公告)号：US10656581B2

公开(公告)日：2020-05-19

申请号：US15936084

申请日：2018-03-26

Applicant: CANON KABUSHIKI KAISHA

Inventor： Takahito Fuse ,  Masami Hano ,  Kenichiro Kitajima ,  Tadashi Fukuda ,  Shota Soda ,  Hidetaka Nakahara ,  Hiroyuki Amano

IPC: G03G15/00 ,  G03G15/04 ,  B41J29/38 ,  G03G21/14

Abstract: An image forming apparatus has a changing portion configured to change, based on a detection result of a temperature sensor, response sensitivity in starting of power supply by a determination portion based on a detection result of a human body detection sensor in a case where a human body approaches the human body detection sensor. The changing portion increases the sensitivity in a case where a temperature detected by the temperature sensor is a second temperature lower than a first temperature than in a case where the temperature detected by the temperature sensor is the first temperature.

公开(公告)号：US20160139532A1

公开(公告)日：2016-05-19

申请号：US14900964

申请日：2014-06-23

Applicant: CANON KABUSHIKI KAISHA

Inventor： Tadashi Fukuda ,  Yoshiro Nishino

IPC: G03G15/02

CPC classification number: G03G15/0291 ,  G03G2215/027

Abstract: In a corona charger including a housing that encloses a discharge electrode and has an open portion on a charging-object side and a shutter that opens and closes the open portion, if discharge products dropped from ends of the shutter adhere to a photosensitive member and absorbs moisture, an image defect called “image deletion” may occur. A charging device includes a corona charger including a discharge electrode and shields provided on two respective sides of the discharge electrode. The corona charger has an open portion on a charging-object side thereof. The open portion is opened and closed by a sheet-type shutter in a longitudinal direction of the charger. The sheet-type shutter is curled in a transverse direction such that a central portion bulges, with respect to two ends, in a thickness direction of the shutter from a front surface that is nearer to the discharge electrode toward a back surface.

Abstract translation: 在包括封装放电电极并且在充电物体侧具有开口部分的壳体和打开和关闭开口部分的快门的电晕充电器中，如果从活门的端部落下的放电产物粘附到感光部件并吸收 可能会发生称为“图像删除”的图像缺陷。 充电装置包括具有放电电极的电晕充电器和设置在放电电极的两个侧面上的屏蔽。 电晕充电器在其充电对象侧具有开口部分。 开放部分由片式闸板沿着充电器的纵向方向打开和关闭。 片状挡板在横向上卷曲，使得中心部分从闸板的厚度方向相对于两端从更靠近放电电极的前表面向后表面凸出。

公开(公告)号：US09274450B2

公开(公告)日：2016-03-01

申请号：US14524607

申请日：2014-10-27

Applicant: CANON KABUSHIKI KAISHA

Inventor： Tadashi Fukuda ,  Yoshiro Nishino

IPC: G03G15/02

CPC classification number: G03G15/0291 ,  G03G15/02 ,  G03G15/0225

Abstract: A charging device includes: a discharging electrode; a casing surrounding the discharging electrode and being provided with an opening in a member-to-be-charged side; a grid electrode provided in the opening and provided with a mesh portion having a plurality of through holes; a cleaning brush, including a base material and a plurality of fibers held on the base material, for cleaning the grid electrode by entrance of a part of the fibers into the through holes while contacting a surface of the grid electrode in the discharging electrode side; a shutter capable of shielding between the member-to-be-charged and the grid electrode; and a moving mechanism for moving the cleaning brush and the shutter along a longitudinal direction of the grid electrode. When the shutter is moved in a closing direction, the cleaning brush moves in advance of a leading end portion of the shutter with respect to the closing direction by a predetermined interval or more.

Abstract translation: 充电装置包括：放电电极; 围绕放电电极并且在待充电部件中设置有开口的壳体; 栅格电极，设置在所述开口中，并设置有具有多个通孔的网孔部分; 清洁刷，其包括基材和多个保持在基材上的纤维，用于通过将一部分纤维进入通孔同时使放电电极侧的栅格电极的表面接触而清洁栅格电极; 能够屏蔽被充电元件和栅格电极之间的快门; 以及用于沿着栅格电极的长度方向移动清洁刷和活门的移动机构。 当快门沿关闭方向移动时，清洁刷相对于关闭方向先于活门的前端部移动预定间隔或更长时间。

公开(公告)号：US09268249B2

公开(公告)日：2016-02-23

申请号：US14524618

申请日：2014-10-27

Applicant: CANON KABUSHIKI KAISHA

Inventor： Takashi Ueno ,  Yoshiro Nishino ,  Tadashi Fukuda

IPC: G03G15/02

CPC classification number: G03G15/0291

Abstract: A charging device includes: a casing provided with an opening opposing a member-to-be-charged; a discharging wire provided in the casing; a grid electrode provided in the opening; a shutter for opening and closing the opening; a cleaning member for cleaning the grid electrode; and a moving mechanism for reciprocating the shutter and the cleaning member along a longitudinal direction of the opening. The moving mechanism includes a driving member for being rotationally driven, a first moving member, held by the driving member, for moving the shutter with rotational drive of the driving member, and a second moving member, held by the driving member, for moving the cleaning member with the rotational drive of the driving member. The charging device further includes: a mechanism for forming an interval between the shutter and the cleaning member so that the cleaning member moves in advance of the shutter by a predetermined distance when the shutter moves in a closing direction; and a stopper for stopping movement of the cleaning member, and the second moving member includes a holding portion for permitting idling when the shutter moves in the closing direction toward the cleaning member, stopped by the stopper, with rotation of the driving member.

Abstract translation: 充电装置包括：壳体，设置有与待充电构件相对的开口; 设置在所述壳体中的放电线; 设置在开口内的栅电极; 用于打开和关闭开口的快门; 用于清洁栅电极的清洁构件; 以及用于沿着开口的纵向使活门和清洁构件往复运动的移动机构。 移动机构包括用于旋转驱动的驱动构件，由驱动构件保持的用于通过驱动构件的旋转驱动来移动闸门的第一移动构件和由驱动构件保持的第二移动构件， 清洁构件，其具有驱动构件的旋转驱动。 充电装置还包括：用于在快门和清洁部件之间形成间隔的机构，使得当快门沿关闭方向移动时，清洁部件在快门前移动预定距离; 以及用于停止所述清洁部件的移动的止动件，并且所述第二移动部件包括保持部，所述保持部能够在所述驱动部件旋转时，所述保持部能够在所述挡板朝向所述清扫部件向所述关闭方向移动时停止。

公开(公告)号：US20150277320A1

公开(公告)日：2015-10-01

申请号：US14672051

申请日：2015-03-27

Applicant: CANON KABUSHIKI KAISHA

Inventor： Nobuhiro Tani ,  Tomoharu Kitajima ,  Tadashi Fukuda

IPC: G03G15/00 ,  G03G21/00

CPC classification number: G03G15/50 ,  G03G15/01 ,  G03G15/0849 ,  G03G15/0855 ,  G03G15/5033 ,  G03G15/5054 ,  G03G2215/00042

Abstract: An image forming apparatus including a movable image bearing member, a sensor arranged so as to oppose the image bearing member, a shutter member movable between an opened position and a closed position, a vibration mechanism configured to apply vibration to the shutter member, and an executing portion configured to execute a vibrating action which applies vibrations to the shutter member by the vibration device based on image formation history information.

Abstract translation: 一种图像形成装置，包括可移动图像承载部件，布置成与图像承载部件相对的传感器，可在打开位置和关闭位置之间移动的挡板部件，被配置为向挡板部件施加振动的振动机构， 所述执行部被配置为执行基于图像形成历史信息通过所述振动装置对所述挡板部件施加振动的振动动作。