Patent ID: 6266500
Filing Date: 2001-07-24
Classification: G03G

Abstract:
A developing apparatus for developing a latent image formed on an electrophotographic photosensitive member, comprising:a developing frame;a developer carrying member for feeding a magnetic developer to develop a latent image formed on the electrophotographic photosensitive member with the developer, wherein a magnet is disposed in said developer carrying member;a magnetic seal member provided at each of one and the other longitudinal ends of said developer carrying member with a clearance from a peripheral surface of said developer carrying member to prevent leakage of the developer in a longitudinal direction of said developer carrying member;a developer regulating member provided contacted to the peripheral surface of said developer carrying member to prevent reentering of the developer having passed through a gap between said developer carrying member and said magnetic seal member, wherein said developer regulating member is disposed downstream of a position where the gap is provided in a rotational direction of said developer carrying member, and said developer regulating member is positioned relative to said developing frame, and wherein said developing frame is provided with a developer carrying member mounting portion for mounting said developer carrying member; anda developing blade for regulating an amount of the developer deposited on a peripheral surface of said developer carrying member,wherein said developing frame is provided with a positioning projection, and by fitting a hole in said developer regulating member around the projection, said developer regulating member is positioned relative to the developing frame.