IMAGE FORMATION APPARATUS, CONTROL METHOD AND PROGRAM OF THE SAME

PROBLEM TO BE SOLVED: To provide an image formation apparatus which comprises a plurality of photoreceptors and brings a blade into contact with each photoreceptor, and in which a frictional resistance can be reduced between the photoreceptor and the blade and variations in a reduction effect due to the position of the photoreceptor can be suppressed.SOLUTION: A printer 100 comprises a plurality of process parts 50Y, 50M, 50C, 50K and a fixing unit 8. Each process part includes a photoreceptor 51, a developing unit 54 and a blade 56. The printer 100 executes a toner supply operation for supplying toner to the developing unit 54 while no printing of a printing job is performed. In the toner supply operation, the printer 100 increases the supply amount of toner supplied per a prescribed rotation number of the photoreceptor 51 for the process unit closer to the fixing unit 8.SELECTED DRAWING: Figure 4 【課題】複数の感光体を備え，各感光体にブレードを接触させる画像形成装置であって，感光体とブレードとの間での摩擦抵抗を低減させ，感光体の位置による低減効果のばらつきを抑制できる技術を提供すること。【解決手段】プリンタ１００は，複数のプロセス部５０Ｙ，５０Ｍ，５０Ｃ，５０Ｋと，定着装置８とを備える。また，各プロセス部は，感光体５１と，現像装置５４と，ブレード５６とを備える。プリンタ１００は，印刷ジョブの印刷を行っていない間に，現像装置５４にトナーを供給させるトナー供給動作を実行する。トナー供給動作では，プリンタ１００は，定着装置８に近いプロセス部ほど，感光体５１の所定回転数あたりに供給されるトナーの供給量を多くする。【選択図】図４