Patent ID: 8923726
Filing Date: 2014-12-30
Classification: G03G

Abstract:
1. A development device comprising: a development casing including a rim which is curved; a developer bearer to carry by rotation two-component developer including toner and carrier, the developer bearer disposed facing a latent image bearer through an opening formed in the development casing, the rim of the development casing being curved around the developer bearer; a magnetic field generator disposed inside the developer bearer; a developer regulator to adjust an amount of developer carried on the developer bearer, the developer regulator disposed upstream from a development range in a direction of rotation of the developer bearer and facing the developer bearer across a predetermined gap; a first seal member to cover a clearance between the latent image bearer and the rim of the development casing adjacent to and upstream from the opening, the first seal member including a second seal member including wherein the first end portion of the first seal member is fixed to an inner portion of the rim of the development casing.