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公开(公告)号：US20190064726A1
公开(公告)日：2019-02-28
申请号：US16054676
申请日：2018-08-03
发明人： Shinji Katagiri , Tsuguhiro Yoshida , Shuichi Tetsuno , Takayuki Tanaka , Takahiro Ikeda , Satoru Motohashi , Takumi Furukawa
CPC分类号： G03G21/0064 , G03G15/0121 , G03G15/0126 , G03G15/0131 , G03G15/0189 , G03G15/0225 , G03G15/0233 , G03G15/0808 , G03G15/161 , G03G15/80
摘要： A charge roller includes, in a surface thereof, recesses that have sizes that are equivalent to or larger than a volume average particle diameter of a toner accommodated in a developing unit and that are capable of collecting the toner retransferred to a photosensitive drum.
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公开(公告)号：US20180181051A1
公开(公告)日：2018-06-28
申请号：US15847726
申请日：2017-12-19
IPC分类号： G03G15/16
CPC分类号： G03G15/80 , G03G15/161 , G03G2215/1661
摘要： An intermediate transfer belt includes at least two layers which are a base layer and an inner surface layer having electric resistance lower than electric resistance of the base layer, and an end portion of the inner surface layer is positioned on an outside of an end portion of a development opening portion in a width direction as a direction orthogonal to a circumferential direction of the intermediate transfer belt.
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公开(公告)号：US09354587B2
公开(公告)日：2016-05-31
申请号：US13911385
申请日：2013-06-06
CPC分类号： G03G21/0005 , G03G15/0189 , G03G15/161 , G03G21/0011
摘要： An image forming apparatus, including: a rotatable image bearing member; a developing unit configured to supply a developer onto the image bearing member; a transfer unit configured to transfer the developer on the image bearing member to a recording medium by a transfer voltage being applied to the transfer unit by a voltage applying unit; and a cleaning unit configured to remove the developer on the image bearing member, wherein when the apparatus stops an image forming operation halfway, the apparatus executes a recovery operation in which the image bearing member is rotated while the voltage applying unit applies a voltage to the transfer unit so that a part of the developer remaining on the image bearing member is once transferred from the image bearing member to the transfer unit, transferred again from the transfer unit to the image bearing member, and then removed by the cleaning unit.
摘要翻译： 一种图像形成装置，包括：可旋转图像承载部件; 显影单元，构造成将显影剂供应到图像承载部件上; 传送单元，被配置为通过施加到转印单元的转印电压通过电压施加单元将图像承载部件上的显影剂转印到记录介质; 以及清洁单元，其构造成去除图像承载部件上的显影剂，其中当所述装置中途停止图像形成操作时，所述装置执行恢复操作，其中所述图像承载部件旋转，同时所述电压施加单元向所述图像承载部件施加电压 转印单元，使得保留在图像承载部件上的显影剂的一部分一次从图像承载部件转印到转印单元，再次从转印单元传送到图像承载部件，然后由清洁单元去除。
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14.发明授权Image forming apparatus with control of charging voltage of photosensitive member 有权具有感光元件充电电压控制的图像形成装置公开(公告)号：US09104130B2
公开(公告)日：2015-08-11
申请号：US14085200
申请日：2013-11-20
IPC分类号： G03G15/02 , G03G15/043
CPC分类号： G03G15/0266
摘要： An image forming apparatus including: photosensitive members; charging devices to which a common charging power source applies a charging voltage to charge the photosensitive members; an exposure device configured to expose the photosensitive members; developing devices to form developer images on the photosensitive members; a transfer device to transfer the developer images onto a transfer medium; and a control portion configured to set a lower limit value of the charging voltage for each photosensitive member, apply the charging voltage having a magnitude not less than any lower limit value from the charging power source to the charging devices, control the output of the laser power for each photosensitive member individually, and set, based on the image density of the developer image transferred onto the transfer medium earlier, the lower limit value for a photosensitive member on which a developer image to be transferred onto the transfer medium later is formed.
摘要翻译： 一种图像形成装置，包括：感光构件; 充电装置，其中公共充电电源施加充电电压以对感光构件充电; 曝光装置，被配置为曝光感光构件; 显影装置以在感光构件上形成显影剂图像; 用于将显影剂图像转印到转印介质上的转印装置; 以及控制部，被配置为设定每个感光部件的充电电压的下限值，将来自充电电源的幅度不小于任何下限值的充电电压施加到充电装置，控制激光器的输出 并且基于更早转印到转印介质上的显影剂图像的图像浓度来设定其后转印到转印介质上的显影剂图像的感光部件的下限值。
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公开(公告)号：US20150098719A1
公开(公告)日：2015-04-09
申请号：US14507515
申请日：2014-10-06
发明人： Keisuke Ishizumi , Shinsuke Kobayashi , Shinji Katagiri , Shuichi Tetsuno , Masaru Ohno , Satoshi Takami
CPC分类号： G03G15/161 , G03G15/5058
摘要： A Zener diode contacts an inner periphery surface of an intermediate transfer belt, and an opposing roller which opposes a detecting member is electrically insulated, in a configuration where transfer is performed at multiple photosensitive drums while an electrical current is applied in a peripheral direction of the intermediate transfer belt.
摘要翻译： 齐纳二极管接触中间转印带的内周表面，并且与检测部件相对的相对辊电绝缘，在以多个感光鼓进行转印的构造中，同时在沿周向方向施加电流 中间转印带
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公开(公告)号：US12099315B2
公开(公告)日：2024-09-24
申请号：US18476841
申请日：2023-09-28
CPC分类号： G03G15/0815 , G03G21/0035 , G03G21/0064 , G03G21/0082 , G03G15/5004 , G03G15/5037 , G03G2221/0015 , G03G2221/0042 , G03G2221/0073
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：US11994823B2
公开(公告)日：2024-05-28
申请号：US18149350
申请日：2023-01-03
CPC分类号： G03G21/0035 , G03G21/0064 , G03G21/1676 , G03G21/168 , G03G2221/0005 , G03G2221/0047
摘要： An image forming apparatus includes a rotatable image bearing member, a developing member to develop an electrostatic latent image at a developing portion, a transfer member to transfer a developer image to a recording member at a transfer portion; and a brush provided with a plurality of base materials 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. The developer remaining on the surface of the image bearing member is collected in the developing portion. An average distance between base materials of the brush with respect to a rotational axis direction of the image bearing member is larger than an average particle diameter of the developer, and is equal to or less than a length corresponding to a spatial frequency visually recognizable by a user when the image formed by the image forming apparatus is observed by the user.
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公开(公告)号：US11846899B2
公开(公告)日：2023-12-19
申请号：US17386368
申请日：2021-07-27
发明人： Shuichi Tetsuno , Shinji Katagiri , Koji An , Hiroko Yokoyama , Wataru Takahashi , Shohei Ishio , Takayuki Tanaka , Tomonori Matsunaga
CPC分类号： G03G15/161 , G03G21/0005
摘要： An image forming apparatus includes a rotatable image bearing member and a rotatable developing member to carry developer made up of toner particles and carrier particles adhered to surfaces of the toner particles. Where a pressing force pressing the developing member against the image bearing member is F1, a total number of the carrier particles interposed between the toner particles and the image bearing member is N1, and an adhesion Ft between a carrier particle and a toner particle, measured when the carrier particle is pressed against the toner particle with F1/N1 that is a pressing force per unit carrier particle, and an adhesion Fdr1 between the carrier particle and the image bearing member, measured when the carrier particle is pressed against the image bearing member with F1/N1, satisfy Ft≤Fdr1.
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公开(公告)号：US11782377B2
公开(公告)日：2023-10-10
申请号：US18092589
申请日：2023-01-03
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：US11693351B2
公开(公告)日：2023-07-04
申请号：US17675629
申请日：2022-02-18
CPC分类号： G03G21/0035 , G03G15/08 , G03G21/0064 , G03G21/10
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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