Tonerschüttbehälter zur Aufnahme von Tonermaterial für die Entwicklungseinrichtung eines elektrofotografischen Bilderzeugungsgerätes

摘要

In an electrophotographic image developing device, a toner chamber, for accommodating toner to be used to develop an image, is arranged to be selectively coupled to one of a toner cartridge and an additional toner holding member. The additional toner holding member functions as an expansion of substantial toner accommodating space in the image developing device. In the toner hopper to be coupled with the toner holding member, the upper surface of the toner accommodated therein is leveled before it is transferred to the toner chamber. Alternately, the cartridge is constructed so that it is able to be coupled with the toner hopper.