| 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.
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