IMAGE FORMING APPARATUS

• Main Author: KONDO AYAKA
• Format: Patent
• Language: English; Japanese
• Published: 19.05.2016
• Subjects: CINEMATOGRAPHY; ELECTROGRAPHY; ELECTROPHOTOGRAPHY; HOLOGRAPHY; MAGNETOGRAPHY; PHOTOGRAPHY; PHYSICS

PROBLEM TO BE SOLVED: To provide an image forming apparatus capable of suppressing the variation of the transfer performance of a plurality of transfer parts.SOLUTION: An image forming apparatus 1 includes a transfer belt 33, an image carrier 50, a transfer part 53, an application part 60, moving parts 62a to 62c, and ammeters 63a to 63c. The image carrier 50 comes into contact with the outer surface OS of the transfer belt 33 and carries a developer image. The transfer part 53 comes into contact with the inner surface IS of the transfer belt 33 and transfers the developer image carried by the image carrier 50 to the outer surface OS of the transfer belt 33. The application part 60 applies a transfer bias voltage to the transfer part 53. The ammeters 63a to 63c measure the current values of currents Ia to Ic flowing in the transfer parts 53 of units 32a to 32c. The moving parts 62a to 62c move the transfer parts 53 of the units 32a to 32c along the inner surface IS of the transfer belt 33 by a distance corresponding to the current values of the currents Ia to Ic flowing in the transfer parts 53 of the units 32a to 32c.SELECTED DRAWING: Figure 2 【課題】複数の転写部の転写性能のばらつきを抑制できる画像形成装置を提供する。【解決手段】画像形成装置１は、転写ベルト３３、像担持体５０、転写部５３、印加部６０、移動部６２ａ〜６２ｃ、及び電流計６３ａ〜６３ｃを備える。像担持体５０は、転写ベルト３３の外表面ＯＳに当接し、現像剤像を担持する。転写部５３は、転写ベルト３３の内表面ＩＳに当接して、像担持体５０が担持する現像剤像を転写ベルト３３の外表面ＯＳに転写する。印加部６０は、転写部５３に転写バイアス電圧を印加する。電流計６３ａ〜６３ｃは、ユニット３２ａ〜３２ｃの転写部５３に流れ込む電流Ｉａ〜Ｉｃの電流値を計測する。移動部６２ａ〜６２ｃは、ユニット３２ａ〜３２ｃの転写部５３に流れ込む電流Ｉａ〜Ｉｃの電流値に応じた距離だけ、ユニット３２ａ〜３２ｃの転写部５３を転写ベルト３３の内表面ＩＳに沿って移動させる。【選択図】図２