Developing equipment has angle between tangent to developing roller peripheral surface at position of fixed magnet's transport magnetic pole and contact surface within defined angular range

摘要

The developing equipment has a developing roller (10), a developer regulating element and an element (60) for breaking up clumps of toner arranged so that a contact surface (60a) is separated from the developing roller's peripheral surface by a defined distance. The angle between the tangent to the roller's peripheral surface at the position of a fixed magnet's (11) transport magnetic pole and the contact surface lies within a defined angular range.