| 摘要 |
PROBLEM TO BE SOLVED: To provide a magnet roll having a sleeve structure which is low in cost and high in durability by using aluminum or aluminum alloy light in weight and good in machinability. SOLUTION: The magnet roll includes a permanent magnet member 1 and a hollow cylindrical sleeve 3 surrounding the outside of the permanent magnet member 1, In the magnet roll, at least the peripheral surface of the sleeve 3 is a multi-layer structure that includes a porous layer formed by anodically oxidizing aluminum or aluminum alloy, and a conductive covering layer 30 formed as the outermost layer along the outer circumference of the porous layer 20. The conductive covering layer 30 is formed so as to extend to the end face of the sleeve and its back section continuing from the end face. COPYRIGHT: (C)2006,JPO&NCIPI
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