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公开(公告)号：US12105445B2
公开(公告)日：2024-10-01
申请号：US18237956
申请日：2023-08-25
发明人： Tomoyuki Sakamaki , Takahiro Suzuki
CPC分类号： G03G15/0928 , G03G15/0812
摘要： A developing device includes a developing container, a rotatable developing member to carry and feed the developer to a developing position, a magnet provided non rotatably and stationarily inside the rotatable developing member and provided with a regulating pole, and a regulating portion to regulate an amount of the developer carried on the rotatable developing member by a magnetic force of the regulating pole. With respect to a rotational direction of the rotatable developing member, a local minimum position, where a magnetic flux density of the regulating pole in a normal direction is a local minimum value, is downstream of a first local maximum position where the magnetic flux density of the regulating pole in the normal direction is a first local maximum value, and is upstream of a second local maximum position where the magnetic flux density of the regulating pole is a second local maximum value.
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公开(公告)号：US20240027938A1
公开(公告)日：2024-01-25
申请号：US18023977
申请日：2020-12-15
发明人： Seungchan PARK , Jungho ROH , Myeongdong KIM , Donguk KIM , Youngkwang SHIN
CPC分类号： G03G15/0928 , G03G15/0818
摘要： In some examples, a developing device includes a developing container including an opening and to store a developer, a developing sleeve installed in the developing container and partially exposed to an outside of the developing container through the opening, a regulation member upstream of the opening in a rotation direction of the developing sleeve and to regulate an amount of the developer adhered to the developing sleeve and supplied to the opening, and a magnetic member inside the developing sleeve. The magnetic member includes a main pole facing the opening, a regulation pole facing the regulation member, and a catch pole upstream of the regulation pole in the rotation direction of the developing sleeve. The magnetic member is to cause adhesion of the developer in the developing container to the developing sleeve. At least one of lengths of the catch pole or the regulation pole and diameters of both end portions of the catch pole or the regulation pole are less than a length and a diameter, respectively, of the main pole.
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公开(公告)号：US11846898B2
公开(公告)日：2023-12-19
申请号：US18093888
申请日：2023-01-06
发明人： Chihiro Tanaka
IPC分类号： G03G15/09 , G03G15/01 , G03G15/08 , G03G15/095
CPC分类号： G03G15/0921 , G03G15/0121 , G03G15/0808 , G03G15/0812 , G03G15/0818 , G03G15/09 , G03G15/095 , G03G15/0928
摘要： A developing device includes a developing container, a developing roller, a supplying roller, a first magnet including a first magnetic pole, a second magnet including second to fourth magnetic poles, and a regulating member. A maximum magnetic flux density of the second magnetic pole is larger in absolute value than a maximum magnetic flux density of the third magnetic pole in a normal direction to the supplying roller, and a maximum magnetic flux density of the third magnetic pole is larger in absolute value than a maximum magnetic flux density of the fourth magnetic pole in the normal direction. With respect to a rotational direction of the supplying roller, an angle between maximum magnetic flux density positions of the second and third magnetic poles is smaller than an angle between maximum magnetic flux density positions of the third and fourth magnetic poles by 10 degrees or more.
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公开(公告)号：US20180203376A1
公开(公告)日：2018-07-19
申请号：US15851371
申请日：2017-12-21
发明人： Tamotsu SHIMIZU
IPC分类号： G03G15/09
CPC分类号： G03G15/0928 , G03G15/0812 , G03G15/0818 , G03G15/0893
摘要： A developing device includes a development roller, a layer-thickness limiting member, and a first screw. The development roller includes a fixed magnet and a sleeve. The first screw supplies developer to the development roller while conveying the developer in a first conveyance direction. The sleeve includes a plurality of recesses. Each of the recesses has an elongated shape, and a downstream end and an upstream end in the first conveyance direction. The downstream end is located farther downstream in a rotational direction of the sleeve than the upstream end. When the developer in each of the recesses passes the layer-thickness limiting member, the developer moves upstream in the first conveyance direction.
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公开(公告)号：US09846392B2
公开(公告)日：2017-12-19
申请号：US15152056
申请日：2016-05-11
CPC分类号： G03G15/0928 , G03G15/0812 , G03G15/0893
摘要： A magnet roller employs a magnetic pole pattern in which a first magnetic pole arranged substantially opposing a regulating blade in an upstream side of a rotation direction of a developing sleeve and a second magnetic pole next to the first magnetic pole in the upstream side have the same polarity, an opposing member having surface roughness higher than at least a particle diameter of carrier is arranged opposing the magnet roller at a position where magnetic force between the first magnetic pole and the second magnetic pole next to the first magnetic pole in the upstream side is almost zero, and an apex of a partition wall provided between a developer bearing member and a developer conveying member provided in a first chamber is positioned below a region where magnetic force formed by the magnet roller is almost zero.
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公开(公告)号：US20170299984A1
公开(公告)日：2017-10-19
申请号：US15635407
申请日：2017-06-28
发明人： Yusuke Ishida , Takanori Iida , Yasushi Takeuchi , Toshiyuki Yamada , Shiro Higashikozono , Hiroto Kakinuma , Toshiya Kobayashi
CPC分类号： G03G15/0928 , G03G15/0818
摘要： A developing device includes a developing container, a developing sleeve, a magnet and grooves provided at a surface of the sleeve and formed along a direction crossing a circumferential direction of the sleeve. In a cross-section, each of the grooves is formed by a flat bottom portion contacting a carrier particle and a pair of side surface portions provided in both sides of the flat bottom portion with respect to the circumferential direction of the sleeve and satisfies the following relationship: r
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公开(公告)号：US09665038B2
公开(公告)日：2017-05-30
申请号：US14940408
申请日：2015-11-13
发明人： Kenta Kubo , Shunichi Takada , Koichi Hashimoto
IPC分类号： G03G15/08 , G03G15/09 , G03G15/095
CPC分类号： G03G15/0818 , G03G15/081 , G03G15/0815 , G03G15/0928 , G03G15/095 , G03G2215/0609
摘要： A developing device includes a developing container, a feeding member, a developer carrying member, and a collecting device. A coverage which is a percentage of coating of surfaces of the carrier particles with the toner particles is 100% or more and 200% or less. The developer carrying member has a plurality of recessed portions formed on a surface thereof so that at least the toner particles having an average particle size are contactable with inner surfaces of the recessed portions, and the carrier particles having an average particle size are not contactable with the inner surfaces of the recessed portions. The recessed portions are formed so that not less than half of the toner particles having the average particle size are exposed from the recessed portions when the toner particles having the average particle size enter the recessed portions.
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公开(公告)号：US20160306301A1
公开(公告)日：2016-10-20
申请号：US15196443
申请日：2016-06-29
IPC分类号： G03G15/09
CPC分类号： G03G15/0928 , G03G9/107 , G03G9/1133 , G03G9/1139 , G03G15/09
摘要： A magnetic carrier according to the present invention includes a magnetic carrier core and a resin covering layer formed on a surface of the magnetic carrier core, wherein the resin covering layer contains a resin component and an inorganic fine particle, the inorganic fine particle contains an oxide of a typical metal element or a carbonate of a typical metal element, a moisture adsorption rate of the inorganic fine particle when allowed to stand in an environment of a temperature of 30° C. and a humidity of 80% for 72 hours is 25.0% by mass or less, an electrical conductivity of the inorganic fine particle is 2.0×10−9 μS/m or more and 2.5×10−5 μS/m or less, and a degree of crystallinity of the inorganic fine particle is 60% or less.
摘要翻译： 根据本发明的磁性载体包括磁性载体芯和形成在磁性载体芯的表面上的树脂覆盖层，其中树脂覆盖层含有树脂组分和无机细颗粒，无机细颗粒含有氧化物 的典型金属元素或典型金属元素的碳酸盐，当在30℃，湿度80％的环境中放置72小时时，无机细颗粒的水分吸附率为25.0％ 以下，无机微粒的电导率为2.0×10 -9μS/ m以上且2.5×10 -5μS/ m以下，无机微粒的结晶度为60％以下 减。
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公开(公告)号：US20160091829A1
公开(公告)日：2016-03-31
申请号：US14859687
申请日：2015-09-21
发明人： Akihiro Noguchi
IPC分类号： G03G15/09
CPC分类号： G03G15/0921 , G03G15/0928
摘要： A multipolar magnet is arranged inside a developer bearing member. A partitioning wall is arranged such that an apex position thereof is located between the developer bearing member and a first conveying member, and is extended up to a position which is located below an upper end position of a zero-gauss zone. A plurality of concaved portions is formed on the surface of the developer bearing member at an interval. Each of the plurality of concaved portions has such an opening shape that a maximum diameter of an inscribed circle is equal to or greater than a diameter of an average grain size of a carrier, and is formed such that the carrier with the average grain size is able to enter each of the concaved portions by a depth that is equal to or greater than a radius thereof.
摘要翻译： 多极磁体布置在显影剂承载构件的内部。 分隔壁布置成使得其顶点位置位于显影剂承载构件和第一输送构件之间，并且延伸到位于零高斯区域的上端位置下方的位置。 多个凹部以间隔形成在显影剂承载部件的表面上。 多个凹部中的每一个具有使内接圆的最大直径等于或大于载体的平均粒径的直径的开口形状，并且形成为使得平均粒径的载体为 能够将各个凹部进入等于或大于其半径的深度。
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10.发明授权Sealing ribs for a developer unit of a dual component development electrophotographic image forming device 有权用于双组分显影电子照相图像形成装置的显影剂单元的密封肋公开(公告)号：US09291947B1
公开(公告)日：2016-03-22
申请号：US14683383
申请日：2015-04-10
发明人： Michael Brian Bacelieri , Robert Dan Bennett, III , Gary Allen Denton , Mark Doerre , Katherine Marie Gilliam , Elliott Vincent Jernigan , Michael David Maul , Matthew Lee Rogers , Dominique Renee Rowe , Robert Christopher Sbert , Keith Seaman , Courtney Harrison Soale
CPC分类号： G03G15/0942 , G03G15/0928
摘要： A developer unit for a dual component development electrophotographic image forming device includes a housing having a reservoir for storing a developer mix that includes toner and magnetic carrier beads. An axial sealing rib projects from an inner side of the housing toward the outer surface of a sleeve of a magnetic roll. The axial sealing rib extends along an axial length of the sleeve. A distal end of the axial sealing rib is positioned in close proximity to and spaced from the outer surface of the sleeve. The axial sealing rib is positioned to impede the flow of developer mix in the reservoir in a direction counter to an operative rotational direction of the sleeve.
摘要翻译： 用于双组分显影电子照相图像形成装置的显影单元包括具有用于存储包括调色剂和磁性载体珠的显影剂混合物的储存器的壳体。 轴向密封肋从壳体的内侧朝向磁性辊的套筒的外表面突出。 轴向密封肋沿套筒的轴向长度延伸。 轴向密封肋的远端定位成紧邻套筒的外表面并与其间隔开。 轴向密封肋被定位成阻止在与套筒的操作旋转方向相反的方向上的储存器中的显影剂混合物的流动。
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