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1.发明申请公开(公告)号：US20180364604A1
公开(公告)日：2018-12-20
申请号：US16004653
申请日：2018-06-11
Applicant: CANON KABUSHIKI KAISHA
Inventor： Takeshi Fujino , Kota Mori , Yuya Nagatomo , Michihiro Yoshida , Jiro Kinokuni
CPC classification number: G03G15/0233 , G03G2215/021
Abstract: A charging roller includes a surface layer containing first and second surface particles and satisfying the following: 6.0 (μm)≤Rz≤18.8 (μm), i) where Rz is a ten-point average roughness (μm) of a charging roller surface, 7 (μm)≤d≤20 (μm), ii) where d is a thickness (μm) of the surface layer, 9.8 (μm)≤D1≤15.8 (μm) and 2.8 (μm)≤D2≤5.2 (μm), iii) where D1 and D2 are average particle size (μm) of the first surface particles, and the second surface particles, respectively, 3.0≤D1/D2≤5.6, and iv) 0.10≤M1/(M1+M2)≤0.32, v) where M1 is a total weight (mg) of the first surface particles per unit area of the charging roller surface, and M2 is a total weight (mg) of the second surface particles per unit area of the charging roller surface.
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公开(公告)号：US09939769B2
公开(公告)日：2018-04-10
申请号：US15226319
申请日：2016-08-02
Applicant: CANON KABUSHIKI KAISHA
Inventor： Michihiro Yoshida
CPC classification number: G03G15/553 , G03G15/0258 , G03G15/5016 , G03G15/556
Abstract: An image forming apparatus includes an image bearing member bearing an electrostatic latent image formed based on image information in forming an image, an electrification member being in contact with a surface of the image bearing member to electrify the image bearing member, a service life determining portion determining whether or not a service life of the electrification member has come to its end based on information concerning an electrification time during which voltage is applied to the electrification member obtained by using a detection result of the environment detecting portion and information concerning an image ratio of a formed image obtained by using the detection result of the environment detecting portion, and an alarm portion issuing an alarm in response to a determination made by the service life determining portion that the service life of the electrification member has come to the end.
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公开(公告)号：US20190064707A1
公开(公告)日：2019-02-28
申请号：US16107921
申请日：2018-08-21
Applicant: CANON KABUSHIKI KAISHA
Inventor： Michihiro Yoshida , Takayuki Suzuki , Tadashi Iwakawa
Abstract: An image forming apparatus includes a photosensitive drum, a driving source for driving the photosensitive drum, a charging roller, a cleaning roller for cleaning the charging roller, a bearing member having an space which allows the charging roller to be moved to a first position in which the charging roller is in contact with the cleaning roller and the photosensitive drum and a second position in which the charging roller is separated from the cleaning roller and is in contact with the photosensitive drum, and a biasing member which biases the bearing member.
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公开(公告)号：US10551763B2
公开(公告)日：2020-02-04
申请号：US16006072
申请日：2018-06-12
Applicant: CANON KABUSHIKI KAISHA
Inventor： Michihiro Yoshida , Takeshi Fujino , Kota Mori , Yuya Nagatomo , Jiro Kinokuni
Abstract: An image forming apparatus includes a photosensitive member, a charging roller, a cleaning roller, an urging member and an image forming portion. The charging roller has an outermost surface layer including an electroconductive resin material, first surface particles having an average particle size of more than 7 μm and less than 30 μm and second surface particles having an average particle size of more than 2 μm and less than 6 μm. The first and second surface particles are dispersed in the electroconductive resin material so as to form first projections and second projections, respectively. The cleaning roller cleaning roller includes a shaft portion and an elastic cleaning portion extending helically around the shaft portion and having a rectangular cross-section perpendicular to an extending direction thereof.
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公开(公告)号：US20170052494A1
公开(公告)日：2017-02-23
申请号：US15226319
申请日：2016-08-02
Applicant: CANON KABUSHIKI KAISHA
Inventor： Michihiro Yoshida
IPC: G03G15/02
CPC classification number: G03G15/553 , G03G15/0258 , G03G15/5016 , G03G15/556
Abstract: An image forming apparatus includes an image bearing member bearing an electrostatic latent image formed based on image information in forming an image (step S1), an electrification member being in contact with a surface of the image bearing member to electrify the image bearing member, a service life determining portion determining whether or not a service life of the electrification member has come to its end based on information concerning an electrification time during which voltage is applied to the electrification member obtained by adapting a detection result of the environment detecting portion and information concerning an image ratio of a formed image obtained by adapting the detection result of the environment detecting portion (Steps S6 through S9), and an alarm portion alarming in response to a determination made by the service life determining portion that the service life of the electrification member has come to the end (step S10).
Abstract translation: 图像形成装置包括在形成图像的同时基于图像信息形成静电潜像的图像承载部件（步骤S1），与图像承载部件的表面接触以使图像承载部件带电的带电部件， 使用寿命确定部分，根据关于通过适应环境检测部分的检测结果而获得的电气化部件上的电压的电气化时间的信息和关于电气化部件的检测结果的信息，确定电气部件的使用寿命是否已经结束 通过适应环境检测部分的检测结果而获得的成像图像的图像比（步骤S6至S9）以及响应于使用寿命确定部分确定的报警部分报警，电气部件的使用寿命 已经结束（步骤S10）。
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Patent Agency Ranking
公开(公告)号：US20130114974A1
公开(公告)日：2013-05-09
申请号：US13660407
申请日：2012-10-25
Applicant: Canon Kabushiki Kaisha
Inventor： Michihiro Yoshida
IPC: G03G21/00
CPC classification number: G03G21/0047
Abstract: An image forming apparatus 100 includes: a common voltage-applying unit 8 that applies a voltage to charging-assistant members 7Y, 7M, and 7C of a plurality of image forming portions PY, PM, and PC; and a control unit 110, at the start of applying a voltage to the charging-assistant members of the plurality of image forming portions by the voltage-applying unit 8, switches the absolute value of the applied voltage from a smaller first value to a larger second value when images are formed by the plurality of image forming portions.
Abstract translation: 图像形成装置100包括：对多个图像形成部PY，PM，PC的充电辅助部件7Y，7M，7C施加电压的公共电压施加部8; 以及控制单元110，在通过施加电压单元8向多个图像形成部的充电辅助构件施加电压开始时，将施加电压的绝对值从较小的第一值切换到较大的值 当由多个图像形成部分形成图像时的第二值。
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公开(公告)号：US20200096899A1
公开(公告)日：2020-03-26
申请号：US16580081
申请日：2019-09-24
Applicant: CANON KABUSHIKI KAISHA
Inventor： Michihiro Yoshida , Masahiro Makino , Tadashi Fukuda , Mikihiro Akasaki , Keisuke Kinai
Abstract: An image forming apparatus includes a photosensitive member, a charging roller, an image forming portion. The charging roller includes an electroconductive rubber layer and is 20 μm or more and 35 μm or less in ten point average roughness of a surface thereof and 130 μm or more and 250 μm or less in average interval of surface unevenness.
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8.发明授权公开(公告)号：US10268132B2
公开(公告)日：2019-04-23
申请号：US16004653
申请日：2018-06-11
Applicant: CANON KABUSHIKI KAISHA
Inventor： Takeshi Fujino , Kota Mori , Yuya Nagatomo , Michihiro Yoshida , Jiro Kinokuni
IPC: G03G15/02
Abstract: A charging roller includes a surface layer containing first and second surface particles and satisfying the following: 6.0 (μm)≤Rz≤18.8 (μm), i where Rz is a ten-point average roughness (μm) of a charging roller surface, 7 (μm)≤d≤20 (μm), ii where d is a thickness (μm) of the surface layer, 9.8 (μm)≤D1≤15.8 (μm) and 2.8 (μm)≤D2≤5.2 (μm), iii where D1 and D2 are average particle size (μm) of the first surface particles, and the second surface particles, respectively, 3.0≤D1/D2≤5.6, and iv 0.10≤M1/(M1+M2)≤0.32, v where M1 is a total weight (mg) of the first surface particles per unit area of the charging roller surface, and M2 is a total weight (mg) of the second surface particles per unit area of the charging roller surface.
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公开(公告)号：US20190094749A1
公开(公告)日：2019-03-28
申请号：US16134690
申请日：2018-09-18
Applicant: CANON KABUSHIKI KAISHA
Inventor： Michihiro Yoshida
IPC: G03G15/08
Abstract: An image forming apparatus includes a first counting unit counting an entire image ratio, a second counting unit counting a partial image ratio, a display unit displaying information about maintenance of a photoconductor, and an execution unit that performs the display in the display unit so that X when the entire image ratio and the partial image ratio have first and second values, respectively, is greater than X when the entire image ratio and the partial image ratio have values smaller than the first and second values, respectively, and X when the partial image ratio and the entire image ratio have third and fourth values, respectively, is smaller than X when the partial image ratio and the entire image ratio have values smaller than the third and fourth values, respectively. X denotes the number of repeated image formations with the fixed entire and partial image ratios.
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公开(公告)号：US20180364637A1
公开(公告)日：2018-12-20
申请号：US16006945
申请日：2018-06-13
Applicant: CANON KABUSHIKI KAISHA
Inventor： Jiro Kinokuni , Kota Mori , Yuya Nagatomo , Michihiro Yoshida , Takeshi Fujino
CPC classification number: G03G15/0233 , G03G5/00 , G03G15/0266 , G03G15/751
Abstract: An image forming apparatus includes a photosensitive member having a surface having elastic deformation power of 47% or more, a charging roller forming a nip between itself and the photosensitive member, and an image forming portion. When a nip region corresponding to the nip is formed and then an area of independent contact portions between the charging member and a measuring contact member is measured, the following relationship is satisfied: (contact width X)×(Contact area ratio α)≤0.1, where a length from a position of one end to a position of the other end of the nip region with respect to a direction perpendicular to a longitudinal direction of the charging roller is the contact width X, and a ratio of a sum of areas of the independent contact portions to an entire area of a measuring region is the contact area ratio α.
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