Patent ID: 8831487

Claim:
A developer layer thickness regulating device, comprising: a blade member for regulating a thickness of a layer of a developer on a surface of a developing roller rotatably supported by a developing container for accommodating the developer; and a supporting member for supporting said blade member; wherein said supporting member is capable of being fastened to a part of the developing container by fastening means, and a position of said supporting member relative to a part of the developing container is adjustable with respect to a widthwise direction of said blade member, when said supporting member is fastened to the developing container by said fastening means, so as to fasten said blade member at a predetermined position relative to the developing container, wherein said supporting member has a projection-recess portion which is capable of biting into the part of the developing container when said supporting member is fastened by said fastening means, and wherein the developing container is softer than said projection-recess portion.