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    • 1. 发明授权
    • Developing apparatus with developer leak prevention
    • 开发人员泄漏防护的开发设备
    • US5075728A
    • 1991-12-24
    • US572404
    • 1990-08-27
    • Yoshiaki KobayashiHatsuo Tajima
    • Yoshiaki KobayashiHatsuo Tajima
    • G03G15/08
    • G03G15/0896G03G15/0875G03G15/0877
    • A developing apparatus includes a container having a first chamber and a second chamber, the second chamber containing a developer; a rotatable developer carrying member in the first chamber to carry the developer through a developing zone where an electrostatic latent image on an image bearing member is developed; a rotatable supply member disposed in the first chamber and cooperative with the developer carrying member to form a nip therebetween to supply the developer supplied from the second chamber to the developer carrying member; and a partition wall between the first chamber and a second chamber having an opening for permitting supply of the developer from the second chamber to the supply member, wherein the opening has a length smaller than a length of the supply member.
    • 显影装置包括具有第一室和第二室的容器,第二室包含显影剂; 第一室中的可旋转的显影剂承载构件,用于将显影剂携带在图像承载构件上的静电潜像被显影的显影区域中; 可旋转的供给构件,设置在所述第一室中并与所述显影剂承载构件协作以在其间形成辊隙,以将从所述第二室供应的显影剂供应到所述显影剂承载构件; 以及位于第一室和第二室之间的分隔壁,其具有用于允许显影剂从第二室供应到供应构件的开口,其中开口的长度小于供应构件的长度。
    • 2. 发明授权
    • Image forming apparatus with AC bias voltages for preventing developer
mixture
    • 具有用于防止显影剂混合的AC偏压的图像形成装置
    • US5030996A
    • 1991-07-09
    • US574893
    • 1990-08-30
    • Hatsuo TajimaYoshiaki Kobayashi
    • Hatsuo TajimaYoshiaki Kobayashi
    • G03G15/01G03G15/06
    • G03G15/0121
    • An image forming apparatus includes an image bearing member movable through first and second developing positions in the order named and a bias voltage applying device applies a first developing bias voltage to a first developer carrying member and a second developing bias voltage to a second developer carrying member. The first bias voltage has a phase of a first electric field for applying to the toner a force from the developer carrying member to the image bearing member for a period t11 in the first developing position and a phase of a second electric field in the opposite direction to the first for a period t21 in the first developing position. The second bias voltage has a phase of a third electric field for applying to the toner a force from the developer carrying member to the image bearing member for a period t12 in the second developing position and a phase of a fourth electric field in the opposite direction to the third for a period t22 in the second developing zone. A ratio of period t22 to period t12 is larger than a ratio of period t21 to period t11. A; and peak level of the second bias voltage in period t12 is larger than a peak level of the first bias voltage in period t11 and a peak level of the second bias voltage in period t22 is smaller than a peak level of the first voltage in period t21.
    • 3. 发明授权
    • Carrier and two-component developer composed of the carrier
    • 载体和双组分显影剂由载体组成
    • US08148041B2
    • 2012-04-03
    • US13012127
    • 2011-01-24
    • Makoto KobayashiYoshiaki KobayashiYoshiyasu Matsumoto
    • Makoto KobayashiYoshiaki KobayashiYoshiyasu Matsumoto
    • G03G9/107
    • G03G9/107G03G9/1075G03G9/113G03G9/1131G03G9/1133
    • An objective is to provide a carrier exhibiting stable charge providing ability in which sufficient charge can be provided to toner having a small particle diameter, and no image contamination such as fog caused by toner scattering via lack of electrification is generated. Another objective is to provide a carrier capable of maintaining a charging level of no interference for image formation even under the image forming condition at which a charging level for printing a number of prints continuously is difficult to be maintained. Disclosed is a carrier comprising a core particle made of ferrite possessing Mg and coated thereon, a resin, wherein the core particle has a ratio of the number of irregular-shaped core particles of at most 5%, based on the total number of core particles, and a surface of the core particle has grains having a maximum grain diameter of 2-5 μm.
    • 目的是提供一种具有稳定的电荷提供能力的载体,其中可以向具有小粒径的调色剂提供足够的电荷,并且不会产生由于通过不起电而由调色剂飞散引起的图像污染。 另一个目标是提供一种即使在连续打印多个打印件的打印水平难以维持的图像形成条件下,也能够保持对图像形成无干扰的充电水平的载体。 公开了一种载体,其包含由具有Mg并且涂覆在其上的铁氧体制成的核心颗粒,树脂,其中核心颗粒具有至多5%的不规则核心颗粒的数量的比率,基于芯颗粒的总数 ,核粒子的表面具有最大粒径为2-5μm的粒子。
    • 10. 发明授权
    • Image forming apparatus with toner amount selection feature
    • 具有调色剂量选择功能的图像形成装置
    • US07013096B2
    • 2006-03-14
    • US10765169
    • 2004-01-28
    • Ichiro OzawaYoshiaki KobayashiHideaki Suzuki
    • Ichiro OzawaYoshiaki KobayashiHideaki Suzuki
    • G03G15/08
    • G03G15/0849G03G15/0853
    • An image forming apparatus includes an image bearing member on which a latent image corresponding to image information is formed, a developing device for developing the latent image on said image bearing member with a developer including carrier and toner, a supplying device for supplying a developer to the developing device, a detector for detecting information corresponding to the magnetic permeability of the developer, and a selecting device for selecting modes on the basis of the information detected by the detecting device, wherein the selecting device can select a first control mode that controls the amount of the developer which is supplied to the developing device by the supplying device on the basis of the information detected by the detector, and a second control mode that controls the amount of the developer which is supplied to the developing device by the supplying device on the basis of the image information.
    • 图像形成装置包括:图像承载部件,其上形成有对应于图像信息的潜像;显影装置,用于利用包含载体和调色剂的显影剂在所述图像承载部件上显影潜像;供给装置,用于将显影剂供应到 显影装置,用于检测与显影剂的磁导率相对应的信息的检测器,以及基于由检测装置检测到的信息来选择模式的选择装置,其中选择装置可以选择控制显影装置的第一控制模式 基于由检测器检测到的信息由供给装置供应到显影装置的显影剂的量以及控制通过供给装置供给到显影装置的显影剂的量的第二控制模式 图像信息的基础。