| 发明名称 |
ROLLER MEMBER FOR ELECTROPHOTOGRAPHY, PROCESS CARTRIDGE AND ELECTROPHOTOGRAPHIC APPARATUS |
| 摘要 |
The roller member has a substrate and an electroconductive elastic layer. The elastic layer has a crown shape of which an outer diameter at the middle in the lengthwise direction is larger than those at its both ends. The elastic layer includes a bowl-shaped resin particle. The surface of the roller member has concavity derived from an opening of the bowl-shaped resin particle and a protrusion derived from an edge of the opening of the resin particle. The relation in the restoring rate for elastic deformation between at the middle of the roller member and at its both ends is such that: on the surface of the elastic layer the restoring rate is larger at both ends than that at the middle, and at the position of depth t μm from the elastic layer surface the restoring rate is larger at the middle than that at both ends. |
| 申请公布号 |
US2014301754(A1) |
申请公布日期 |
2014.10.09 |
| 申请号 |
US201414244804 |
申请日期 |
2014.04.03 |
| 申请人 |
CANON KABUSHIKI KAISHA |
发明人 |
Uematsu Atsushi;Miyagawa Noboru;Sato Taichi |
| 分类号 |
G03G15/02 |
主分类号 |
G03G15/02 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
1. A roller member for electrophotography comprising:
an electroconductive substrate and an electroconductive elastic layer as a surface layer;
whereinthe electroconductive elastic layer has a crown shape of which an outer diameter at the middle of the roller member in the lengthwise direction is larger than those at both ends of the roller member;the electroconductive elastic layer comprises a binder and a bowl-shaped resin particle;the surface of the roller member has a concavity derived from an opening of the bowl-shaped resin particle and a protrusion derived from an edge of the opening of the bowl-shaped resin particle; andwherein the relation in the restoring rate of the roller member for elastic deformation between at the middle of the roller member in the lengthwise direction and at both ends of the roller member is such that:on the surface of the electroconductive elastic layer, the restoring rate is larger at the both ends than that at the middle, andat the position of depth t μm from the surface of the electroconductive elastic layer, the restoring rate is larger at the middle than that at the both ends. |
| 地址 |
Tokyo JP |
