Patent ID: 8005407
Filing Date: 2011-08-23
Classification: G03G

Abstract:
1. A developer apparatus, comprising: a container which houses toner; a toner carrier roller that is provided, on a surface thereof, with a plurality of convex sections which are regularly arranged and a concave section which surrounds the convex sections, is shaped approximately like a cylinder, and rotates while carrying a toner layer of charged toner on the surface thereof; and a restriction member that abuts on the surface of the toner carrier roller to form a restriction nip, restricts a thickness of the toner layer carried on the surface of the toner carrier roller in the restriction nip, and removes the toner layer on the convex sections from among the toner layer carried on the surface of the toner carrier roller at an upstream-side end of the restriction nip in a rotation direction of the toner carrier roller, wherein an upstream-side end of the restriction member in the rotation direction of the toner carrier roller abuts on the convex sections, and a part of toner carried by the concave section moves to the convex sections to cover the convex sections with the toner at a downstream side to the restriction nip in the rotation direction of the toner carrier roller.