Developing apparatus with regulating member seal member and magnetic seal member

Abstract

A developing apparatus includes a developing frame and a developer carrying member provided in the developing frame, for carrying a developer to a developing position for developing an electrostatic image formed on an image bearing member by the developer. A regulating member is provided in the developing frame, for regulating a thickness of the developer carried on the developer carrying member. A regulating member seal member is provided for sealing a gap between the regulating member and the developing frame, and magnetic seal members opposed to a peripheral surface of lengthwise end portions of said developer carrying member. Magnetic portions of the magnetic seal members are formed so as to extend from portions in which the magnetic seal members are opposed to the developer carrying member to potions in which the magnetic seal members are opposed to the lengthwise end portions of the regulating member seal member.

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