| 摘要 |
PURPOSE:To stably eliminate magnetic powder attached on a head by forming both a magnetic powder eliminator and a roller to support the eliminator in spherical shape. CONSTITUTION:The roller 13 supported on a roller supporting shaft 6 at the tip part of an arm 7 rotatably freely is formed in the spherical shape, and the magnetic powder eliminator 14 consisting of polyurethane foam provided on the outer periphery of the roller 13 is also formed in the spherical shape similarly. By forming them in such spherical shape, it is possible to keep the contact force of the magnetic powder eliminator 14 on the head 2 constant even when dispersion in parallelism between the roller supporting shaft 6 and a head drum rotary shaft 3 due to the dispersion of components exists, and to eliminate the magnetic powder stably. |
