发明名称 |
Verfahren zur Herstellung einer Trommel für ein elektrophotographisches Aufzeichnungsmaterial |
摘要 |
A base drum of an electrophotographic photoconductor has a straightness of 0.04 mm or less, a roundness of 0.04 mm or less, a wall-thickness non-uniformity of +/-0.015 mm or less and a maximum surface roughness (Rmax) in the range from 0.3 to 1.0 mu m. This base drum is produced by a method in which a metallic sheet in the form of a drum is welded by a high-frequency welder to form an electroseamed tube, and the electroseamed tube is subjected to the ironing or sinking-ironing process. |
申请公布号 |
DE4137848(C2) |
申请公布日期 |
1997.09.11 |
申请号 |
DE19914137848 |
申请日期 |
1991.11.16 |
申请人 |
RICOH CO., LTD., TOKIO/TOKYO, JP |
发明人 |
WATANABE, TADASHI, NUMAZU, SHIZUOKA, JP |
分类号 |
B21C37/08;B21D51/36;B24B5/22;G03G5/10;G03G15/00;(IPC1-7):G03G5/10;B23P13/00 |
主分类号 |
B21C37/08 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|