| 摘要 |
PURPOSE:To provide magnetic rollers having sufficiently large surface magnetic flux density of magnetic poles and superior in the action of moving magnetic particles in the axial direction by providing the spiral magnetic poles on the outer peripheral surface of a cylindrical body. CONSTITUTION:A magnetic pole piece 1 is a magnetic substance for the permanent magnet and has a form similar to one of equidivided cylinder which is sector-shaped in section and elongated in the axial direction. Plural magnetic pole pieces are combined to form a cylindrical body 2 and spiral magnetic poles are deposited on the outer peripheral surface of the cylindrical body, thereby to constitute a magnetic roller as shown in the figure. In this way, N poles and S poles are alternately formed on the outer peripheral surface of the cylindrical body 2 in a spiral shape. The bottom figure is a graph which shows the result when the surface magnetic flux density is measured along the spiral magnetic poles of the magnetic roller. The difference (y) between the maximum and minimum portions serves to accelerate the lateral movement of the magnetic particles when applied to magnetic brushes or the like. |
