公开(公告)号：US6060202A

公开(公告)日：2000-05-09

申请号：US046435

申请日：1998-03-24

申请人： Yoshihiro Ogawa ,  Koichi Tomiyama ,  Keita Nozawa ,  Shunji Suzuki

发明人： Yoshihiro Ogawa ,  Koichi Tomiyama ,  Keita Nozawa ,  Shunji Suzuki

IPC分类号： G03G9/08 ,  G03G9/097 ,  G03G13/08

CPC分类号： G03G9/0819 ,  G03G9/097

摘要： An electrophotographic toner including a blend of toner particles, and external additive particles, is provided with characteristic particle size distribution conditions, i.e., (i) a particle size distribution based on a Coulter counter measurement, including a weight-average particle size D4 of X .mu.m and Y % by number of particles having sizes of 2.00-3.17 .mu.m satisfying:-5X+35.ltoreq.Y.ltoreq.-25X+180 (1)3.5.ltoreq.X.ltoreq.6.5 (2), and(ii) a particle size distribution based on a flow particle image analyzer measurement, including A % by number of particles having circle-equivalent diameters of at least 1.00 .mu.m and below 1.03 .mu.m and B % by number of particles having circle-equivalent diameters of at least 2.00 .mu.m and below 2.06 .mu.m satisfying:B-A.ltoreq.0.30 (3).As a result, the toner is provided with a stable developing performance even in a long period of continuous image formation in a high temperature/high humidity environment.

摘要翻译： 包括调色剂颗粒和外部添加剂颗粒的混合物的电子照相调色剂具有特征粒度分布条件，即（i）基于库尔特计数器测量的粒度分布，包括X的重均粒径D4 μm和Y％，其粒径为2.00-3.17μm，满足：-5X + 35