发明名称 |
Developer holding member, development device, process cartridge, image forming apparatus and method of manufacturing hollow body |
摘要 |
A developer holding member includes a magnetic field generating device and a hollow body including the magnetic field generating device thereinside, and attracting a developer to an external surface thereof with magnetic force of the magnetic field generating device. The external surface of the hollow body is randomly provided with a large number of depressions, and a peak intensity of a spectrum within a range of wavelengths not more than 1 mm, which is figured out by performing a frequency analysis using a profile curve in a circumferential direction of the external surface, is not more than 12.
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申请公布号 |
US7664441(B2) |
申请公布日期 |
2010.02.16 |
申请号 |
US20070775455 |
申请日期 |
2007.07.10 |
申请人 |
RICOH COMPANY, LTD. |
发明人 |
IMAMURA TSUYOSHI;KOETSUKA KYOHTA;TAKANO YOSHIYUKI;OHSAWA MASAYUKI;ABE HIROYA;TERASHIMA MIEKO;KAMIYA NORIYUKI;WATANABE MASAKI;NAKAMURA SHIGEHARU |
分类号 |
G03G15/08 |
主分类号 |
G03G15/08 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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