| 摘要 |
PROBLEM TO BE SOLVED: To provide an image forming device where lowering of toner concentration generated during a continuous printing action can be decreased. SOLUTION: In this device, a control part is constituted so that a following control can be executed. That is, a relationship of size between an output voltage VT and a concentration lowered reference value Vb is discriminated (s3), in the case it is 'VT>=Vb' (Y at s3), that is, when the toner concentration is below a threshold value, toner replenishing action process is executed during the printing action process (s10). The continuous printing action of the device is interrupted and the necessary quantity of a toner is replenished in this toner replenishing action process. |
