Patent ID: 9671719
Date: 2017-06-06
CPC Classifications: B29C,B29L,G03G

Claim:
1. A layer thickness restriction member that is disposed with respect to a developer bearing member, which bears a developer, with a gap between the layer thickness restriction member and the developer bearing member, and restricts an amount of developer on the developer bearing member, the layer thickness restriction member comprising: a base portion that extends in a longitudinal direction of the developer bearing member; and a layer thickness restriction portion that projects from the base surface, extends in the longitudinal direction of the developer bearing member, and restricts the amount of developer on the developer bearing member, wherein the base portion extends along a tangential direction of the developer bearing member at a position on the developer bearing member closest to the layer thickness restriction portion, and includes an upstream-side opposing portion, which is adjacent to the layer thickness restriction portion on an upstream side in a rotation direction of the developer bearing member and opposes the developer bearing member, and a downstream-side opposing portion, which is adjacent to the layer thickness restriction portion on a downstream side in the rotation direction of the developer bearing member and opposes the developer bearing member, wherein the layer thickness restriction member is integrally formed of resin by injection molding and comprises an injection portion through which the resin is injected to form the layer thickness restriction portion in the injection molding, wherein the injection portion is provided in just one position in the layer thickness restriction member where a distance of the one position from one end of the layer thickness restriction member in a longitudinal direction of the layer thickness restriction member is in a range of ten percent or more and under forty percent with respect to a full length of the layer thickness restriction member, and wherein the injection portion is provided on a side surface of the downstream-side opposing portion which is along the longitudinal direction of the developer bearing member.