Magnetic sealing for development equipment

摘要

A magnetic seal (132,232) for sealing a member (90,290) rotated about its axis in a developer apparatus (60) is provided. The seal includes a magnetic field producing member (117,213) and magnetizable members (142,242). The magnetizable members are positioned adjacent and on opposite faces (121,221) of the magnetic member. The magnetizable members have at least a portion (160,260) thereof progressively increasing in thickness in a direction substantially parallel to the axis of the member as distance from the axis increases. The magnetizable members are spaced (136) from the member and provide magnetic fields (140,240) to capture developer material and prevent the passage thereof past the seal . IMAGE