IMAGE FORMING DEVICE

• Main Authors: GOTO GOSUKE, SHINDO TAKESHI, MASUI KOICHIRO, YAMAUCHI HISASHI
• Format: Patent
• Language: English; Japanese
• Published: 25.05.2017
• Subjects: CINEMATOGRAPHY; ELECTROGRAPHY; ELECTROPHOTOGRAPHY; HOLOGRAPHY; MAGNETOGRAPHY; PHOTOGRAPHY; PHYSICS

PROBLEM TO BE SOLVED: To provide a technique capable of reducing a toner consumption amount required for the detection of a color shift.SOLUTION: An image forming device includes a control part for detecting a shift amount from a reference position of a transfer position at which a developer image is transferred on an intermediate transfer belt. The control part detects the shift amount from a reference position of a transfer position on the basis of the reference value and a shift amount based on a change of the current value detected by a current detection part for detecting the current flowing a charging roller when an electrostatic image for detection formed on the photosensitive drum by light exposure passes a position opposite to the charging roller. When the control part detects the shift amount at a transfer position, the absolute value of the potential of the exposure part exposed in the photosensitive drum surface is larger than the absolute value of the voltage value applied to the developer roller.SELECTED DRAWING: Figure 9 【課題】色ずれの検知に必要となるトナーの消費量を低減することができる技術を提供する。【解決手段】現像剤像が中間転写ベルトに転写される転写位置の基準位置からのずれ量を検出するための制御部であって、露光により感光ドラムに形成された検知用静電像が帯電ローラとの対向位置を通過する際の、帯電ローラに流れる電流を検知する電流検知部が検知する電流値の変化に基づくずれ量と、基準値とに基づいて、転写位置の基準位置からのずれ量を検出する制御部を備え、制御部でが転写位置のずれ量を検出する際に、感光ドラム表面のうち露光された露光部の電位の絶対値が、現像ローラに印加される電圧の値の絶対値よりも大きいことを特徴とする。【選択図】図９