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公开(公告)号：US20240019796A1
公开(公告)日：2024-01-18
申请号：US18476841
申请日：2023-09-28
CPC分类号： G03G15/0815 , G03G21/0035 , G03G21/0082 , G03G21/0064 , G03G2221/0073 , G03G2221/0042 , G03G2221/0015 , G03G15/5037
摘要： An image forming apparatus includes a photosensitive member, a charging member, an exposing device, a developing device, a transfer member, a brush, a voltage applying portion, and a control portion controlling a surface potential of the photosensitive member at the brush contacting position. When a value of subtracting a value of the surface potential of the photosensitive member in the brush contacting position from a value of the brush voltage is defined as a contacting position potential difference, the control portion controls the surface potential of the photosensitive member in the brush contacting position so that the contacting position potential difference is changed from a first potential difference to a second potential difference in a predetermined direction which is either one of an increasing direction or a decreasing direction, and then the contacting position potential difference is changed from the second potential difference to a third potential difference in the predetermined direction.
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公开(公告)号：US11841669B2
公开(公告)日：2023-12-12
申请号：US17986078
申请日：2022-11-14
CPC分类号： G03G21/0064 , G03G15/0216 , G03G21/0035 , G03G21/06 , G03G21/08 , G03G2215/017 , G03G2215/022 , G03G2221/0005
摘要： An image forming apparatus includes a charging unit that charges an image bearing member, a developing unit that forms a toner image on an latent image formed on the image bearing member, a transfer unit that transfers the toner image onto a transfer material, a charge neutralizer that neutralizes a charge of the image bearing member downstream of a transfer portion and upstream of a charging portion in a rotating direction of the image bearing member, a conductive collecting unit that collects a material adhering on the image bearing member downstream of the transfer portion and upstream of the charging portion, wherein the developing unit collects residual toner on the image bearing member, an voltage application unit sets a potential difference between the voltage applied to the collecting unit and the surface electric potential of the image bearing member not more than a discharge threshold.
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公开(公告)号：US11385584B2
公开(公告)日：2022-07-12
申请号：US17348998
申请日：2021-06-16
发明人： Toshihiko Takayama , Takeshi Shinji
摘要： An image forming apparatus includes a control unit configured to perform a first mode, a second mode, and a third mode. The first mode is a mode in which a sheet conveyance unit is controlled so that an arrival time from a passage of a trailing edge of a preceding sheet through a nip portion to an arrival of a leading edge of a succeeding sheet succeeding to the preceding sheet at the nip portion becomes a first time. The second mode is a mode in which the sheet conveyance unit is controlled so that the arrival time becomes a second time. The third mode is a mode in which the sheet conveyance unit is controlled so that the arrival time becomes a third time. The second time is longer than the first time, and the third time is longer than the second time.
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公开(公告)号：US11112735B2
公开(公告)日：2021-09-07
申请号：US16714533
申请日：2019-12-13
发明人： Taro Minobe , Keizo Kojima , Naoki Kanno , Atsushi Nakamoto , Toshihiko Takayama , Hideo Nanataki
IPC分类号： G03G15/16
摘要： A controller can select and execute a full color mode of performing image formation in a first state in which each primary transfer member is in contact with an intermediate transfer belt, and a monochrome mode of performing image formation in a second state in which only a primary transfer member is in contact with the intermediate transfer belt. The controller determines which state of the first state and the second state is formed, based on a detection result obtained by a current detection circuit when a photosensitive drum is charged by a charging roller, and voltage is applied to the primary transfer member from a primary transfer power source.
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公开(公告)号：US20140314431A1
公开(公告)日：2014-10-23
申请号：US14259195
申请日：2014-04-23
发明人： Ryo Morihara , Takao Kume , Toshihiko Takayama
CPC分类号： G03G15/1615 , G03G15/0136
摘要： An image forming apparatus includes a plurality of image bearing members; a belt for receiving toner images from the image bearing members and for transferring the toner image onto a transfer material; a controller for driving the image bearing members; and wherein the image forming apparatus is operable in a monochromatic mode in which the toner image is formed only on a predetermined one of the image bearing members, and no image is formed on the other image bearing member, wherein in a operation in the monochromatic mode, the controller starts to drive the plurality of image bearing members in synchronism with each other in a state that the other image bearing member is spaced from the belt, and the predetermined image bearing member is in contact with the belt.
摘要翻译： 图像形成装置包括多个图像承载部件; 用于从图像承载部件接收调色剂图像并将调色剂图像转印到转印材料上的带; 用于驱动图像承载部件的控制器; 并且其中图像形成装置可以单色模式操作，其中调色剂图像仅形成在预定的一个图像承载部件上，并且在另一个图像承载部件上不形成图像，其中在单色模式中的操作 控制器在另一图像承载构件与带间隔开的状态下开始同步地驱动多个图像承载构件，并且预定图像承载构件与带接触。
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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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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：US20210405567A1
公开(公告)日：2021-12-30
申请号：US17348998
申请日：2021-06-16
发明人： Toshihiko Takayama , Takeshi Shinji
摘要： An image forming apparatus includes a control unit configured to perform a first mode, a second mode, and a third mode. The first mode is a mode in which a sheet conveyance unit is controlled so that an arrival time from a passage of a trailing edge of a preceding sheet through a nip portion to an arrival of a leading edge of a succeeding sheet succeeding to the preceding sheet at the nip portion becomes a first time. The second mode is a mode in which the sheet conveyance unit is controlled so that the arrival time becomes a second time. The third mode is a mode in which the sheet conveyance unit is controlled so that the arrival time becomes a third time. The second time is longer than the first time, and The third time is longer than the second time.
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