| 摘要 |
PURPOSE: To remarkably improve/simplify the production and assembly of magnet system by making the cross section of each magnet block into square. CONSTITUTION: This magnet system is composed of magnet blocks 1 having square-shaped cross sections. The respective magnet blocks 1 are arranged in the form of loop in a distance R from a rotary axial line A of drum type magnetic selector and fixed on a main body G of drum. The magnetizing direction of each magnet block 1 [an arrow (x)] turns toward mutually different directions determined according to a prescribed mathematical expression. Thus, all the magnet blocks 1 can be uniformly produced in two magnetizing directions, namely, only in the magnetizing direction parallel with the side wall of magnet blocks and in the diagonal magnetizing direction inclined at 45 deg.. |
