Patent Number: 6,167,211

Title: Image forming apparatus having a function for recycling collected toner and control method thereof

Abstract: In an image forming apparatus and a controlling method thereof, the image forming apparatus comprises conveyer mechanisms for conveying collected toner to a waste part or a recycling part, and a controller for controlling the conveyer mechanism and a developer supplying device according to image forming conditions. When the image forming condition exceeds a predetermined reference level, the controller decreases a recycling rate of the collected toner. If the recycling rate becomes high as a result of the controlling, the controller decreases an amount of supplying the developer so as to lower toner density. Thus, reference toner density in the developer is controlled, thereby, high quality images can be maintained, and the controller can be simplified.

Inventors: Oogi; Syuji (Toyohashi, JP), Taniguchi; Toshihide (Toyokawa, JP)

Assignee: Minolta Co., Ltd.

International Classification: G03G 21/10 (20060101); G03G 015/08 (); G03G 021/10 ()

Expiration Date: 12/26/2017