ELECTROPHOTOGRAPHIC IMAGE FORMING APPARATUS

摘要

An eletrophotographic image forming apparatus may include a developing unit; a toner buffer unit which feeds a toner to the developing unit, and includes an agitating member agitating the toner contained inside the toner buffer unit and a first carrying member carrying the toner contained inside the toner buffer unit to the developing unit; a toner cartridge which feeds the toner to the toner buffer unit, and includes a second carrying member carrying the toner contained inside the toner cartridge to the toner buffer unit; and a control unit which controls a first driving unit driving the second carrying member and a second driving unit driving the agitating member and the first carrying member, and the control unit includes a first feed mode, a second feed mode and a toner supplement mode.

主权项

1. An eletrophotographic image forming apparatus comprising:
a developing unit; a toner buffer unit which is connected to the developing unit and which feeds a toner to the developing unit, the toner buffer unit includes an agitating member which agitates the toner contained inside the toner buffer unit and a first carrying member which carries the toner contained inside to the developing unit; a toner cartridge which is connected to the toner buffer unit and which feeds the toner to the toner buffer unit, the toner cartridge includes a second carrying member which carries the toner contained inside the toner cartridge to the toner buffer unit; and a control unit which controls a first driving unit which drives the second carrying member and a second driving unit which drives the agitating member and the first carrying member, wherein the control unit selects one of a plurality of modes comprising: a first feed mode in which the toner is not fed from the toner cartridge to the toner buffer unit and which the toner is fed from the toner buffer unit to the developing unit, a second feed mode in which the toner is fed from the toner cartridge to the toner buffer unit and in which the toner is fed from the toner buffer unit to the developing unit, and a toner supplement mode in which the toner is fed from the toner cartridge to the toner buffer unit and in which the toner is not fed from the toner buffer unit to the developing unit.