Entwickler-Zuführbehälter, Entwicklungsvorrichtung mit diesem Behälter und Arbeitseinheit

摘要

A guide surface for engaging by a flexible film member (5) closing a developer discharge opening (4) of a developer supplying container is disposed at a downstream side of an elastic seal member (6) against which the film (5) is slidingly contacted when the film (5) is pulled out, whereby the film (5) is bent convexly against the elastic seal member (6).