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公开(公告)号：US12124182B2
公开(公告)日：2024-10-22
申请号：US18181986
申请日：2023-03-10
发明人： Shuichi Tetsuno , Toshihiko Takayama , Shuhei Tokiwa , Shimpei Ishikawa , Shunsuke Matsushita , Mikihiko Hamada
CPC分类号： G03G15/0266 , G03G15/0216 , G03G15/065 , G03G21/0064 , G03G2215/022
摘要： An image-forming apparatus to execute an image-forming operation includes an image bearing member, a charging member to charge at a charging portion a surface of, and a developing member to supply at a developing portion toner to, the image bearing member. When a rotating image bearing member stops rotating, a surface potential of the image bearing member formed on the developing portion is defined as V1, a developing voltage applied to the developing member is defined as V2, a charging voltage applied to the charging member is defined as V3, and a surface potential of the image bearing member formed on the charging portion is defined as V4. A first potential difference, which is a potential difference between V2 and V1, and a second potential difference, which is a potential difference between V3 and V4, are controlled based on information about a number of execution times of the image-forming operation.
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公开(公告)号：US12025944B2
公开(公告)日：2024-07-02
申请号：US18230813
申请日：2023-08-07
CPC分类号： G03G21/0035 , G03G21/169 , G03G2221/0005 , G03G2221/0089
摘要： An image forming apparatus includes a rotatable image bearing member, a developing unit to develop an electrostatic latent image at a developing portion, a transfer unit to transfer a developer image to a recording member at a transfer portion; and a brush provided with a plurality of fibers contacting the image bearing member at downstream of the transfer portion and upstream of the developing portion in a rotational direction of the image bearing member. An average contacting pressure of the brush per one fiber to the image bearing member is smaller than a depositing force of the developer not transferred to the recording member to the image bearing member. As the brush in a state of not in contact with the image bearing member is viewed from a free end side of the fibers, an average number of the fibers included in a circumference of a diameter of 100 μm is more than one.
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3.发明授权公开(公告)号：US11971670B2
公开(公告)日：2024-04-30
申请号：US17472298
申请日：2021-09-10
发明人： Koji An , Shinji Katagiri , Shuichi Tetsuno
IPC分类号： G03G15/16
CPC分类号： G03G15/1675 , G03G15/162
摘要： An image forming apparatus includes an intermediate transfer belt, an outer roller, a power source, and a regulation member. The outer roller transfers a toner image onto a recording material. The power source applies a voltage to the outer roller. The regulation member regulates orientation of the recording material. Information is acquired regarding a timing at which orientation of a recording material first portion, passing through the transfer portion that is located between the outer roller and the regulation member, can change to move closer to the intermediate transfer belt. Based on the acquired information, a transfer voltage target value for transfer onto the recording material is changed between a first target value of a period anterior to the timing and a second target value of a period posterior to the timing that is larger in absolute value than the first target value.
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公开(公告)号：US11703775B2
公开(公告)日：2023-07-18
申请号：US17515636
申请日：2021-11-01
发明人： Shinsuke Kobayashi , Kensuke Umeda , Ai Suzuki , Kazuhiro Funatani , Shuichi Tetsuno , Toshihiko Takayama , Jun Hara
CPC分类号： G03G15/0266 , G03G15/0225 , G03G15/065 , G03G15/1675 , G03G21/0064
摘要： An image forming apparatus includes a photosensitive member, a charging member, an electrostatic image forming portion, a developing member, a transfer member, a transfer voltage source, a brush member, a brush voltage source, and a controller capable of executing a cleaning operation. The controller carries out control so that the cleaning operation includes a first operation in which a potential difference is formed between the transfer member and the photosensitive member so that toner charged to a normal charge polarity is moved from the transfer member toward the photosensitive member, and a second operation in which a potential difference is formed between the brush member and the photosensitive member so that the toner charged to the normal charge polarity is moved from the photosensitive member toward the brush member.
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公开(公告)号：US20220269213A1
公开(公告)日：2022-08-25
申请号：US17675629
申请日：2022-02-18
摘要： A driving unit is controlled so that a driving state where an image bearing member is driven with a first potential difference formed between a brush member and the image bearing member at a contact portion where the image bearing member is in contact with the brush member transitions to a stopped state where the image bearing member stops being driven with a second potential difference formed, the second potential difference having an absolute value less than that of the first potential difference.
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公开(公告)号：US20220100126A1
公开(公告)日：2022-03-31
申请号：US17547036
申请日：2021-12-09
发明人： Keisuke Ishizumi , Shohei Ishio , Shinji Katagiri , Takayuki Tanaka , Tsuguhiro Yoshida , Shuichi Tetsuno
IPC分类号： G03G15/16
摘要： An intermediate transfer belt has a first region and a second region in an outer circumferential surface thereof that is in contact with a blade. The first region has a first dynamic friction coefficient in a belt conveyance direction, and the second region has a second dynamic friction coefficient. The distance of the second region in the belt conveyance direction is less than the distance of the first region and is greater than the distance of a contact portion in which the blade is in contact with the intermediate transfer belt.
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公开(公告)号：US20220082965A1
公开(公告)日：2022-03-17
申请号：US17472298
申请日：2021-09-10
发明人： Koji An , Shinji Katagiri , Shuichi Tetsuno
IPC分类号： G03G15/16
摘要： An image forming apparatus includes an intermediate transfer belt, an outer roller, a power source, and a regulation member. The outer roller transfers a toner image onto a recording material. The power source applies a voltage to the outer roller. The regulation member regulates orientation of the recording material. Information is acquired regarding a timing at which orientation of a recording material first portion, passing through the transfer portion that is located between the outer roller and the regulation member, can change to move closer to the intermediate transfer belt. Based on the acquired information, a transfer voltage target value for transfer onto the recording material is changed between a first target value of a period anterior to the timing and a second target value of a period posterior to the timing that is larger in absolute value than the first target value.
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公开(公告)号：US20200319578A1
公开(公告)日：2020-10-08
申请号：US16903894
申请日：2020-06-17
发明人： Keisuke Ishizumi , Shohei Ishio , Shinji Katagiri , Takayuki Tanaka , Tsuguhiro Yoshida , Shuichi Tetsuno
IPC分类号： G03G15/16
摘要： An intermediate transfer belt has a first region and a second region in an outer circumferential surface thereof that is in contact with a blade. The first region has a first dynamic friction coefficient in a belt conveyance direction, and the second region has a second dynamic friction coefficient. The distance of the second region in the belt conveyance direction is less than the distance of the first region and is greater than the distance of a contact portion in which the blade is in contact with the intermediate transfer belt.
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公开(公告)号：US10289036B2
公开(公告)日：2019-05-14
申请号：US15910464
申请日：2018-03-02
摘要： In an image forming apparatus, a peripheral velocity difference is provided between a peripheral velocity of an intermediate transfer belt and a peripheral velocity of an image bearing member, and when a relative moving distance between the image bearing member and the intermediate transfer belt, which is generated in the transfer nip portion because of the peripheral velocity difference, is taken as a shift amount of the toner image, a lower limit value of the shift amount is set to be at least ⅜, preferably half of an average perimeter calculated from a weight-average particle diameter of the toner, which is measured in advance.
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公开(公告)号：US10248043B2
公开(公告)日：2019-04-02
申请号：US15816818
申请日：2017-11-17
摘要： In a case where a collection mode in which an exposure unit forms a first potential on a photosensitive member and a developing unit collects discharging toner discharged from the developing unit to a position where the first potential is formed is executed, a potential forming unit forms, on an intermediate transfer member, a potential same as a normal charging polarity of toner and an absolute value greater than an absolute value of the first potential, and a charging power supply applies, to a charging member, a voltage having a polarity same as the normal charging polarity and an absolute value greater than an absolute value of the first potential.
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