IMAGE FORMATION DEVICE

To deal with the situation in which the down-time is longer when a discharge step is executed during a slow-rate operation than when a discharge step is executed during a high-rate operation, in a case where an image formation operation is continued with the operational rate switched.SOLUTION: A CPU...

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Bibliographic Details
Main Author KONNO YUYA
Format Patent
LanguageEnglish
Japanese
Published 04.06.2020
Subjects
CINEMATOGRAPHY
ELECTROGRAPHY
ELECTROPHOTOGRAPHY
HOLOGRAPHY
MAGNETOGRAPHY
PHOTOGRAPHY
PHYSICS
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Summary:To deal with the situation in which the down-time is longer when a discharge step is executed during a slow-rate operation than when a discharge step is executed during a high-rate operation, in a case where an image formation operation is continued with the operational rate switched.SOLUTION: A CPU 104 executes a discharge step if the amount of toner on a conduction brush 31 becomes larger than a threshold value X1 when an image formation is performed in the same image formation mode. The CPU 104 executes a discharge step in an image formation mode with a higher process speed when the amount of toner attaching on the conduction brush 31 is at least the threshold value X2, smaller than the threshold value X1, in a case where an image formation is performed with the image formation mode changed.SELECTED DRAWING: Figure 1 【課題】 動作速度を切り替えて画像形成動作を継続する場合、低速動作中に吐き出し工程を実施してしまうと、高速動作中に吐き出し工程を実施する場合と比べダウンタイムが長くなってしまう。【解決手段】 ＣＰＵ１０４は、画像形成モードを変更せずに画像形成を行う際に、導電ブラシ３１に付着したトナーの量が閾値Ｘ１を超えた場合に吐き出し工程を実施する。また、ＣＰＵ１０４は、画像形成モードを切り替えて画像形成を行う際に、導電ブラシ３１に付着したトナーの量が、閾値Ｘ１よりも小さい閾値Ｘ２以上である場合に、よりプロセススピードの早い画像形成モードで吐き出し工程を実施する。【選択図】 図１
Bibliography:Application Number: JP20180225252