公开(公告)号：US5876893A

公开(公告)日：1999-03-02

申请号：US805609

申请日：1997-02-25

申请人： Masahisa Ochiai ,  Masumi Asanae ,  Tsutomu Saitoh ,  Takashi Hayano

发明人： Masahisa Ochiai ,  Masumi Asanae ,  Tsutomu Saitoh ,  Takashi Hayano

IPC分类号： G03G9/08 ,  G03G9/10 ,  G03G9/107

CPC分类号： G03G9/10 ,  G03G9/0823 ,  G03G9/107

摘要： An Li--Mn ferrite carrier comprising 2 to 15 mol % of Li.sub.2 O, 5 to 30 mol % of MnO and 60 to 90 mol % of Fe.sub.2 O.sub.3. The carrier may contain at least one sintering aid selected from the group consisting of CaO, Na.sub.2 O, SiO.sub.2, V.sub.2 O.sub.5, Al.sub.2 O.sub.3, As.sub.2 O.sub.3, Bi.sub.2 O.sub.3, Sb.sub.2 O.sub.3 and B.sub.2 O.sub.3 to improve the surface properties thereof. The carrier may be made sensitive to the intensity of electric field by regulating the specific volume resistivities at 200 V/cm and 10 kV/cm within the specific ranges. This carrier is particularly suitable in the reversal developing method, and in the developing method where an A.C. bias voltage is superimposed to a D.C. bias voltage.

摘要翻译： 包含2至15mol％的Li 2 O，5至30mol％的MnO和60至90mol％的Fe 2 O 3的Li-Mn铁氧体载体。 载体可以含有至少一种选自CaO，Na 2 O，SiO 2，V 2 O 5，Al 2 O 3，As 2 O 3，Bi 2 O 3，Sb 2 O 3和B 2 O 3的烧结助剂以改善其表面性质。 可以通过在特定范围内通过调节200V / cm和10kV / cm的比体积电阻率来使载体对电场强度敏感。 该载体特别适用于反转显影方法，并且在将直流偏置电压叠加到直流偏置电压的显影方法中。

公开(公告)号：US6134413A

公开(公告)日：2000-10-17

申请号：US962265

申请日：1997-10-31

申请人： Masumi Asanae ,  Tsutomu Saitoh ,  Takashi Hayano

发明人： Masumi Asanae ,  Tsutomu Saitoh ,  Takashi Hayano

IPC分类号： G03G9/113 ,  G03G15/08 ,  G03G15/34 ,  G03G15/09

CPC分类号： G03G9/113 ,  G03G15/344 ,  G03G9/1136 ,  G03G9/1139 ,  G03G2217/0091

摘要： A magnetic carrier for a developer used in electrostatically forming a visual image, comprising a magnetic core material, an electrically-conductive particle-containing resin layer and electrically-conductive particles externally added to the electrically-conductive particle-containing resin layer, the magnetic carrier having a magnetization (.sigma..sub.1000) of 61-100 emu/g at 1 kOe magnetic field, a specific volume resistance of 10.sup.6 .OMEGA..multidot.cm or less, and an average particle size of 10-100 .mu.m. The magnetic carrier of low specific volume resistance has a high durability and provides high quality images. In particular, when the magnetic carrier is applied to an image forming process by rear side exposure, the residual toner on the image-bearing member can be effectively removed without using an additional cleaning means, and high quality images free from the background fogging and contamination can be produced.

摘要翻译： 用于静电形成视觉图像的显影剂的磁性载体，包括磁性材料，导电颗粒的树脂层和外部添加到导电颗粒的树脂层中的导电颗粒，磁性载体 在1kOe磁场下具有61-100emu / g的磁化强度（σ1000），106ΩEGEGAxcm以下的比体积电阻和10-100μm的平均粒径。 低体积电阻的磁性载体具有高耐久性，并提供高质量的图像。 特别地，当通过背面曝光将磁性载体施加到图像形成处理时，可以有效地去除图像承载部件上的残留调色剂而不使用附加的清洁装置，并且高质量的图像没有背景雾化和污染 可以生产。