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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：US20240272576A1
公开(公告)日：2024-08-15
申请号：US18641579
申请日：2024-04-22
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 special 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：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：US11947304B2
公开(公告)日：2024-04-02
申请号：US17948546
申请日：2022-09-20
CPC分类号： G03G21/0035 , G03G15/161 , G03G2215/1661 , G03G2221/0005
摘要： A cleaning device includes: a cleaning brush that has bristles that rotate and contact a surface, to which toner has adhered, of a cleaning member to be cleaned, the cleaning brush removing the toner adhered to the surface of the cleaning member; a first contact member that contacts the bristles without a position of the first contact member relative to a position of the cleaning brush being changed; and a second contact member that contacts the bristles at a location downstream from the first contact member in a direction of rotation of the cleaning brush and without a position of the second contact member relative to the position of the cleaning brush being changed, and that is disposed on an extension line extended from a line between an axial center of the cleaning brush and a base of the bristles that move away from the first contact member.
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公开(公告)号：US11892791B2
公开(公告)日：2024-02-06
申请号：US17989047
申请日：2022-11-17
CPC分类号： G03G15/5008 , G03G15/161 , G03G15/1615 , G03G21/0035
摘要： An image forming apparatus includes a rotatable photosensitive member; a charging portion, an exposure portion, a developing member, a transfer unit, a contact and separation portion, a charging voltage applying portion, a detecting portion, and a controller. The controller is capable of executing an operation in an image forming mode and an operation in a detecting mode. The controller carries out control so that a charging current flowing through a charging portion during charging of the photosensitive member in the operation in the detecting mode is lower than a charging current flowing through the charging portion during charging of the photosensitive member in the operation in the image forming mode.
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公开(公告)号：US11868076B2
公开(公告)日：2024-01-09
申请号：US17925375
申请日：2021-05-19
CPC分类号： G03G21/0094 , F16N15/00 , F16N29/02 , G03G21/007 , G03G15/0225 , G03G21/0035
摘要： An example lubricant coating device includes a rotatable applicator to apply lubricant from a solid lubricant source to a member to be coated, and a supporting device to support the solid lubricant source in a contact state with the rotatable applicator. The supporting device changes a supporting angle of the solid lubricant source relative to the rotatable applicator when a consumption of the solid lubricant source reaches a consumption threshold.
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公开(公告)号：US11860566B2
公开(公告)日：2024-01-02
申请号：US18081910
申请日：2022-12-15
发明人： Takayuki Kanazawa , Nobuo Oshima , Takayoshi Kihara , Kuniaki Tamagaki , Shuhei Tokiwa , Taichi Sato
CPC分类号： G03G21/0064 , G03G15/0225 , G03G15/168 , G03G21/0005 , G03G21/007 , G03G21/169 , G03G21/0035 , G03G2215/022 , G03G2221/0005 , G03G2221/0089 , G03G2221/1618 , G03G2221/1627
摘要： An image forming apparatus includes a rotatable image bearing member, a developing member, a transfer member, and a brush contacting a surface of the image bearing member in a contact portion downstream of a transfer portion and upstream of a developing portion with respect to a rotational direction of the image bearing member. The toner which is not transferred onto a toner image receiving member is collected by the developing member. In a charging series, the toner is positioned on the same side as a normal charge polarity of the toner relative to the brush. In the contact portion, a maximum value of a contact pressure of 0.7 gf/mm2 or more and 3.5 gf/mm2 or less, a maximum contact area ratio is 18% or more and 74% or less, and a Clark-Evans index of the brush is 1 or more.
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公开(公告)号：US20230418207A1
公开(公告)日：2023-12-28
申请号：US18213875
申请日：2023-06-25
发明人： Takashi KAINUMA , Kazuhisa HIRAHARA
IPC分类号： G03G21/00
CPC分类号： G03G21/0076 , G03G21/0035 , G03G2221/001
摘要： An image forming apparatus includes a photoconductor drum, a developing roller, a first shaft provided for one of the photoconductor drum and the developing roller, a second shaft provided for the other of the photoconductor drum and the developing roller, a first housing supporting the first shaft, and removable in an axial direction of the first shaft, a second housing supporting the second shaft, and removable in an axial direction of the second shaft, a first contact member provided on an axial end portion of the first housing, a second contact member provided on an axial end portion of the second housing, and located in contact with the first contact member, a first cover covering the first contact member, and a first cleaning device provided on the first cover, and configured to rub against the second contact member, when the second housing is inserted or removed.
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公开(公告)号：US20230375963A1
公开(公告)日：2023-11-23
申请号：US18247853
申请日：2021-10-05
发明人： Masaki KADOTA
CPC分类号： G03G15/0891 , G03G15/0889 , G03G21/0035 , G03G21/0017
摘要： A toner conveying device includes a toner conveying passage through which toner is conveyed, a conveying screw, and a brush member. The conveying screw includes a rotary shaft rotatably arranged inside the toner conveying passage and a helical blade formed on the outer circumferential face of the rotary shaft. The brush member has a number of brush bristles that swing while in contact with the outer circumferential face of the conveying screw and that are planted at a predetermined interval along the axial direction of the conveying screw. On the brush member, the blush bristles planted at one place are composed of one to three fibers, and the blush bristles are planted parallel to each other at a predetermined interval of 0.5- to 3 mm.
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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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