Separating discharge is investigated in order to suppress image degradation due to separating discharge in belt transfer system used in electrophotography. In this process, paper clings to the electro-resistive belt, and is stably fed through the processor. However, electrical discharge may occur between the paper and the belt when the paper is separated from the belt under particular conditions. Since the discharge causes image degradation, it is important to make clear the separating discharge phenomena. From the model experiment, the strong correlation between the sheet potential before separation(Vs) and discharge is examined. When Vs is low, local strong discharge occurs intermittently. On the other hand, the separating discharge becomes continuous and weak when Vs is high. Image degradation can be suppressed when the sheet is highly charged enough.
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