| 摘要 |
<p>A magnet roller, wherein the surface magnetic forces, on a magnet roller body part (2) at the circumferential angles, of the magnetic force peaks of magnetic force patterns formed on a virtual circular surface corresponding to the outer peripheral surface of a sleeve are generally made equal to each other and maximized, and radial distances from a shaft part axis to the outer peripheral surface of the magnet roller body part at the circumferential angles corresponding to the magnetic peaks are differentiated according to the magnitudes of the peak magnetic forces of the magnetic force peaks of the magnetic force patterns on the virtual circular surface (R0), whereby the magnetic force patterns same as conventional ones can be formed on the surface of the sleeve by reducing the cross sectional area of the magnet roller body parts less than those of the conventional ones.</p> |
