| 摘要 |
PROBLEM TO BE SOLVED: To stably provide a magnet with high magnetic sealing ability, at a low cost. SOLUTION: In the magnetic seal for developer, consisting of synthetic resin magnet utilizing magnetic powder as raw material, whose inherent coersive force is <=7,000 oersteds, an antitropy of inner polarity is imparted in the direction of the magnet orientation. |
