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1. 发明授权

US5258253A Magnetic carrier for electronic reproduction coated with a nitrogen containing silicone resin 失效
标题翻译：用含氮硅树脂涂覆的电子复制用磁性载体
公开(公告)号：US5258253A
公开(公告)日：1993-11-02
申请号：US838325
申请日：1992-02-20
申请人： Takatomo Fukumoto , Takashi Teshima , Kazuhiko Yamamura , Kyouya Taguchi , Hiroyuki Hazama , Takeshi Higuchi , Koji Honda
发明人： Takatomo Fukumoto , Takashi Teshima , Kazuhiko Yamamura , Kyouya Taguchi , Hiroyuki Hazama , Takeshi Higuchi , Koji Honda
IPC分类号： G03G9/08 , G03G9/113 , G03G9/083
CPC分类号： G03G9/1136 , G03G9/0823
摘要： Disclosed is a two-component type developer comprising a toner and a coated magnetic carrier wherein said toner has an electroconductivity lower than 3.5.times.10.sup.-10 S/cm and the coating of said magnetic carrier consists of a silicone resin having as its component unit a basic nitrogen atom-containing organic group bonded to a silicone atom (N-containing silicone resin).Such developer is capable of forming images having a high image density and a high image quality, particularly as a white developer or a color developer if developing is carried out even under ordinary conditions, since the toner has its charge quantity maintained in an appropriate range in the developing step.
摘要翻译：公开了一种双组分型显影剂，其包含调色剂和涂覆的磁性载体，其中所述调色剂具有低于3.5×10 -10 S / cm的导电性，并且所述磁性载体的涂层由有机硅树脂组成，所述硅树脂的组分单元为碱性与含硅原子结合的含氮原子的有机基团（含N的有机硅树脂）。这样的显影剂能够形成具有高图像密度和高图像质量的图像，特别是作为白色显影剂或彩色显影剂，即使在普通条件下进行显影，因为调色剂的电荷量保持在适当的范围内开发步骤。

2. 发明授权

US5310617A Magnetic brush developing process and developer 失效
标题翻译：磁刷开发过程和开发者
公开(公告)号：US5310617A
公开(公告)日：1994-05-10
申请号：US593885
申请日：1990-10-05
申请人： Kyouya Taguchi , Takashi Teshima , Kazuhiko Yamamura , Takatomo Fukumoto
发明人： Kyouya Taguchi , Takashi Teshima , Kazuhiko Yamamura , Takatomo Fukumoto
IPC分类号： G03G9/10 , G03G13/09 , G03G9/107
CPC分类号： G03G9/10
摘要： Disclosed are a two-component type developer which is supplied to an area where a bias voltage of at least 250 V is applied, and a developing process using this developer. In this developer, by adjusting the particle size distribution of carrier particles within a specific range, occurrence of the so-called carrier dragging phenomenon of the transfer of the carrier together with the toner to a photosensitive material can be prevented. This adjustment of the particle size distribution is such that the content of carrier particles having a size smaller than 250 mesh is less than 8% by weight based on the entire carrier particles, the diameter D.sub.50 of the weight average particle size corresponding to 50% of the weight of the entire carrier particles is in the range of from 80 to 120 .mu.m and the difference between D.sub.25 and D.sub.75 is in the range of from 5 to 20 .mu.m.
摘要翻译：公开了一种双组分型显影剂，其被供应到施加至少250V的偏置电压的区域和使用该显影剂的显影处理。在这种显影剂中，通过调整载体颗粒在特定范围内的粒度分布，可以防止载体与调色剂一起转印到感光材料上的所谓载体拖曳现象。这种粒度分布的调节使得尺寸小于250目的载体颗粒的含量基于载体颗粒的总和小于8重量％，重均粒径的直径D50对应于50重量％整个载体颗粒的重量在80至120μm的范围内，D25和D75之间的差在5至20μm的范围内。

3. 发明授权

US5168027A Carrier of developer, process for preparation thereof, and developing method using same 失效
标题翻译：开发商承运人，其准备过程和使用相同的开发方法
公开(公告)号：US5168027A
公开(公告)日：1992-12-01
申请号：US599826
申请日：1990-10-19
申请人： Kyouya Taguchi , Takashi Teshima , Kazuhiko Yamamura , Takatomo Fukumoto
发明人： Kyouya Taguchi , Takashi Teshima , Kazuhiko Yamamura , Takatomo Fukumoto
IPC分类号： G03G9/097 , G03G9/10 , G03G9/107 , G03G9/113
CPC分类号： G03G9/107 , G03G9/10 , G03G9/1132
摘要： Disclosed is a carrier of a developer, which is characterized in that the current value observed when a direct current is applied under a voltage of 200 V is 0.8 to 2.0 .mu.A and the relaxation time is in the range of from 4.0 to 6.0 milliseconds, that is, the characteristic values in the dynamic state, for example, in a developing apparatus, are kept with certain ranges. If this developer carrier is used, an image having a high quality can be obtained without occurrence of troubles often caused in conventional developers, such as carrier dragging (transfer of the carrier to a photosensitive material together with the toner), fogging (transfer of the toner to the background of a copying sheet) and letter thinning.

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