Patent ID: 6321050
Filing Date: 2001-11-20
Classification: G03G

Abstract:
A developing device for developing a latent static-electric image into a visible image from developer, the developing device comprising:a developing case for holding developer, the developing case being, formed with an opening that extends in a lengthwise direction, the developing case including a lower-edge attachment surface and two end attachment surfaces at the opening, the end attachment surfaces being on either side of and bordering the lower-edge attachment surface in the lengthwise direction and being indented with respect to the lower-edge attachment surface;a developer bearing body disposed in the opening of the developing case in confrontation with the latent static-electric image, with lengthwise ends of the developer bearing body rotatably supported on the developing case;end leak prevention members each attached on a corresponding end attachment surface of the developing case, and each in sliding contact with a corresponding peripheral surface of the developer bearing body near a corresponding lengthwise end of the developer bearing body;a lower-edge leak prevention member attached on the lower-edge attachment surface of the developing case and extending in the lengthwise direction, the lower-edge leak prevention member being in sliding contact along a length of the developer bearing body at a position downstream, with respect to a rotational direction of the developer bearing body, from where the developer bearing body confronts the latent static-electric image; andattachment-surface-border leak prevention members located to the inside of the end leak prevention members, each attachment-surface-border leak prevention member being made from a resilient foam material and attached to the lower-edge attachment surface at a corresponding border position between the lower-edge attachment surface and a corresponding end attachment surface, with at least a portion of one side surface in contact with a portion of one side surface of a corresponding end leak prevention member.