-
公开(公告)号：US10345741B2
公开(公告)日：2019-07-09
申请号：US15890702
申请日：2018-02-07
发明人： Masashi Fujishima , Norio Kubo , Junichi Nakagawa , Asami Sasaki
IPC分类号： G03G15/08 , G03G15/095
摘要： A developing device includes a developing container, first and second stirring-conveyance members, a developer carrier, a toner concentration sensor, a scraper, and a scraper attachment unit. The second stirring-conveyance member includes a rotation shaft, a first spiral blade to convey developer in an axial direction, and a second spiral blade to overlap a region where the first spiral blade is formed, which is opposite to the first spiral blade in phase, and lower than the first spiral blade in height in a radial direction. An absent region, where the second spiral blade does not exist, is formed in one pitch of the first spiral blade, the one pitch facing the toner concentration sensor. The scraper attachment unit is formed to extend, along a straight line passing through intersection points of the first and second spiral blades and parallel to the rotation shaft, into the absent region.
-
公开(公告)号：US11314183B2
公开(公告)日：2022-04-26
申请号：US17322298
申请日：2021-05-17
发明人： Masashi Fujishima , Norio Kubo , Asami Sasaki , Yasuhiro Tauchi , Tamotsu Shimizu , Akira Matayoshi , Masaki Kadota , Koji Suenami , Yuji Toyota
IPC分类号： G03G15/08
摘要： A developing device includes a developer container, a developer carrier, and first and second stirring/conveying members. The developer container includes a first partition wall partitioning between the two conveying chambers longitudinally, a first communication portion for passing developer from the first to the second conveying chamber, a second communication portion for passing developer from the second to the first conveying chamber, a developer supply port for supplying developer in, a developer discharge portion for discharging excessive developer, a second partition wall arranged, adjacent to the regulating portion, downstream of the second communication portion to partition between the first conveying chamber and the regulating portion, and a shield portion connected to the two partition walls to bridge between them to shield a top part of the second communication portion. A gap is formed between an upper end part of the shield portion and the inner surface of the developer container.
-
公开(公告)号：US11209752B2
公开(公告)日：2021-12-28
申请号：US17322198
申请日：2021-05-17
发明人： Asami Sasaki , Akira Matayoshi , Norio Kubo , Koji Suenami , Yuji Toyota , Tamotsu Shimizu , Masashi Fujishima , Yasuhiro Tauchi
IPC分类号： G03G15/08
摘要： A developing device includes a developer container, a developer carrier, and first and second members for stirring/conveying. The developer container includes a first partition wall between first and second chambers, a communication portion through which those chambers communicate at opposite ends of the first partition wall, a developer supply port, and a developer discharge portion. The first member stirs and conveys developer in the first chamber in a first direction. The second member stirs and conveys developer in the second chamber in a second direction and includes a regulating portion and a discharging blade. The developer container includes a second partition wall between the first chamber and the regulating portion. The gap from the upper end of the second partition wall to the inner surface of the developer container is larger than the gap thereto from the upper ends of a first helical blade and the regulating portion.
-
公开(公告)号：US12055873B2
公开(公告)日：2024-08-06
申请号：US18455662
申请日：2023-08-25
CPC分类号： G03G15/0891 , G03G9/0823 , G03G9/1139 , G03G15/0898 , G03G15/0907 , G03G15/0848 , G03G2215/0619 , G03G2215/0634
摘要： An image forming apparatus includes a developer, a development device, and an image bearing member. The developer includes an initial developer containing an initial carrier and a replenishment developer containing a replenishment carrier. The initial carrier has a surface roughness Sa1 of at least 0.3 μm and no greater than 1.0 μm. A ratio Sa1/Sa2 of the surface roughness Sa1 of the initial carrier to a surface roughness Sa2 of the replenishment carrier is at least 1.2 and no greater than 3.4. The packing volume Vp calculated from equation (1)“Vp=100×Y/(Z×DS)” was at least 40% and no greater than 70%. In equation (1), Y represents an amount of the developer conveyed by a developer bearing member. Z represents an apparent density of the initial developer. DS represents a width of a space between the developer bearing member and the image bearing member.
-
公开(公告)号：US20210302867A1
公开(公告)日：2021-09-30
申请号：US17206261
申请日：2021-03-19
发明人： Tamotsu Shimizu , Norio Kubo , Asami Sasaki , Yasuhiro Tauchi , Yuji Toyota
IPC分类号： G03G15/06
摘要： A bias condition determiner executes, in order, a first direct current voltage determination mode (first DC calibration) for determining a provisional reference direct current voltage that is a provisional reference for a direct current voltage of a developing bias applied to a developing roller, an inter-peak voltage determination mode (AC calibration) for determining a reference inter-peak voltage that is a reference for an inter-peak voltage of an alternating current voltage of the developing bias applied to the developing roller in an image forming operation, and a second direct current voltage determination mode (second DC calibration) for determining a reference direct current voltage that is a reference for the direct current voltage of the developing bias applied to the developing roller in the image forming operation.
-
公开(公告)号：US11112722B1
公开(公告)日：2021-09-07
申请号：US17206248
申请日：2021-03-19
发明人： Tamotsu Shimizu , Norio Kubo , Asami Sasaki , Yasuhiro Tauchi , Yuji Toyota
IPC分类号： G03G15/06
摘要： A bias condition determiner executes a direct current voltage determination mode (DC calibration) for determining a reference direct current voltage that is a reference for a direct current voltage of a developing bias applied to a developing roller in an image forming operation and an inter-peak voltage determination mode (AC calibration) for determining a reference inter-peak voltage that is a reference for an inter-peak voltage of an alternating current voltage of the developing bias applied to the developing roller in the image forming operation. A calibration executor determines whether the inter-peak voltage determination mode needs to be executed in accordance with a value of the reference direct current voltage.
-
公开(公告)号：US11163243B2
公开(公告)日：2021-11-02
申请号：US17206261
申请日：2021-03-19
发明人： Tamotsu Shimizu , Norio Kubo , Asami Sasaki , Yasuhiro Tauchi , Yuji Toyota
IPC分类号： G03G15/06
摘要： A bias condition determiner executes, in order, a first direct current voltage determination mode (first DC calibration) for determining a provisional reference direct current voltage that is a provisional reference for a direct current voltage of a developing bias applied to a developing roller, an inter-peak voltage determination mode (AC calibration) for determining a reference inter-peak voltage that is a reference for an inter-peak voltage of an alternating current voltage of the developing bias applied to the developing roller in an image forming operation, and a second direct current voltage determination mode (second DC calibration) for determining a reference direct current voltage that is a reference for the direct current voltage of the developing bias applied to the developing roller in the image forming operation.
-
公开(公告)号：US09372443B2
公开(公告)日：2016-06-21
申请号：US14838359
申请日：2015-08-27
发明人： Asami Sasaki , Masaru Hatano , Norio Kubo
CPC分类号： G03G15/0896 , G03G15/0818 , G03G15/0865 , G03G21/0052 , G03G21/206
摘要： A developing device includes a developing container, a toner carrier, and a plurality of air outlet ports. The plurality of air outlet ports are formed in such part of a wall of the developing container as faces the toner carrier, along a longitudinal direction of the developing container, the air outlet ports communicating with a duct next to the developing container. The toner carrier includes a coat layer on the outer circumferential surface thereof. The coat layer is formed by dripping the toner carrier into a resin coating liquid with one end in the longitudinal direction thereof first, the one end being a lower end of during the dipping, and then lifting the toner carrier out of the resin coating liquid. The toner carrier is arranged such that the lower end of during the dipping is disposed on an upstream side with respect to an airflow direction in the duct.
摘要翻译： 显影装置包括显影容器，调色剂载体和多个空气出口。 多个空气出口端口沿着显影容器的纵向方向形成在显影容器的壁的与调色剂载体相对面的一部分中，空气出口与与显影容器相邻的管道连通。 调色剂载体在其外圆周表面上包括涂层。 涂层通过将调色剂载体滴落到树脂涂布液中而形成，其一端沿其长度方向一端，一端为浸渍时的下端，然后将调色剂载体从树脂涂布液中提出。 调色剂载体布置成使得浸渍期间的下端相对于管道中的气流方向设置在上游侧。
-
公开(公告)号：US09207583B1
公开(公告)日：2015-12-08
申请号：US14823200
申请日：2015-08-11
发明人： Tamotsu Shimizu , Masaru Hatano , Asami Sasaki , Norio Kubo
CPC分类号： G03G15/0928 , G03G15/0808 , G03G15/0812 , G03G15/0893
摘要： A developing device includes a housing, a developer carrier, a conveying member and a surface layer. The developer carrier carries a developer on a circumferential surface. The conveying member is rotatably arranged in a first conveying portion and conveys the developer in the first conveying direction and supplies the developer to the developer carrier. The surface layer is formed on a surface of a predetermined cylindrical base member. The surface layer is formed by an immersion method of immersing the base member in a predetermined immersion tank so that an axial direction of the base member extends along a vertical direction. A lower end side of the base member at the time of the immersion is arranged in an upstream side of the housing and an upper end side of the base member at the time of the immersion is arranged in a downstream side of the housing.
摘要翻译： 显影装置包括壳体，显影剂载体，输送构件和表面层。 显影剂载体在圆周表面上携带显影剂。 输送构件可旋转地布置在第一输送部分中并沿着第一输送方向输送显影剂，并将显影剂供应到显影剂载体。 表面层形成在预定的圆筒形基体的表面上。 表面层通过将基底部件浸渍在预定的浸渍槽中，使得基部构件的轴向沿着垂直方向延伸的浸渍方法形成。 浸渍时的基材的下端侧配置在壳体的上游侧，浸渍时的基材的上端侧配置在壳体的下游侧。
-
-
-
-
-
-
-
-
搜索结果
9 条记录 (耗时 0.015 秒)
