发明授权
- 专利标题： Charging roller featuring specified ratio of storage elastic modulus and dynamic viscoelasticity values and process cartridge and electrophotographic apparatus featuring the same
- 专利标题（中）： 充电辊具有特定比例的储能弹性模量和动态粘弹性值，处理盒和电摄影装置具有相同的特性
-
申请号： US11434121申请日： 2006-05-16
-
公开(公告)号： US07209683B2公开(公告)日： 2007-04-24
- 发明人: Hiroshi Abe , Hirobumi Takahashi , Ayumi Okuda , Tomoya Kawakami
- 申请人： Hiroshi Abe , Hirobumi Takahashi , Ayumi Okuda , Tomoya Kawakami
- 申请人地址： JP Tsukuba-shi
- 专利权人： Canon Kasei Kabushiki Kaisha
- 当前专利权人： Canon Kasei Kabushiki Kaisha
- 当前专利权人地址： JP Tsukuba-shi
- 代理机构： Fitzpatrick, Cella, Harper & Scinto
- 优先权： JP2005-044045 20050221; JP2005-044046 20050221; JP2006-027023 20060203
- 主分类号： G03G15/02
- IPC分类号： G03G15/02
摘要：
Charging roller has at least a support member and a conductive covering member, the charging roller where a value of tan δ expressed in a ratio of a storage elastic modulus and a loss elastic modulus by dynamic viscoelasticity in a cross sectional direction of the charging roller at 25° C. is 0.2 or more in a range of 1 to 20 kHz and 0.2 or less in a range of 1 to 10 Hz, or a charging roller where the conductive covering member is constructed of two or more layers and a value of tan δ in at least one layer other than a surface layer is 0.2 or more at 10 Hz in a range of 10 to 50° C. and a value of tan δ in a cross sectional direction of the whole charging roller is 0.2 or less at 10 Hz in a range of 10 to 50° C.
公开/授权文献
信息查询
