IMAGE FORMING APPARATUS
PROBLEM TO BE SOLVED: To provide means that attach an image forming unit storing a black developer to a black position.SOLUTION: An image forming apparatus comprises: a transfer body; a plurality of image forming units; and a density sensor that is arranged opposite to the transfer body, and the ima...
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| Format: | Patent |
| Sprache: | eng ; jpn |
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| Zusammenfassung: | PROBLEM TO BE SOLVED: To provide means that attach an image forming unit storing a black developer to a black position.SOLUTION: An image forming apparatus comprises: a transfer body; a plurality of image forming units; and a density sensor that is arranged opposite to the transfer body, and the image forming apparatus prints developer images formed by the image forming units on a medium. The image forming apparatus forms, on the transfer body, a detection pattern formed of the developer image with the image forming unit attached to a black position, and detects, with the density sensor, whether a detection value of diffused reflection of the detection pattern is equal to or less than a diffused reflection threshold.SELECTED DRAWING: Figure 4
【課題】黒位置に黒色の現像剤を収容した画像形成ユニットを装着する手段を提供する。【解決手段】転写体と、複数の画像形成ユニットと、前記転写体に対向配置された濃度センサと、を備え、前記画像形成ユニットで形成した現像剤像を媒体上に印刷する画像形成装置であって、前記転写体に、黒位置に装着された前記画像形成ユニットによって現像剤像からなる検出パターンを形成し、前記濃度センサにより、前記検出パターンの拡散反射の検出値が、拡散反射閾値以下か否かを検出する。【選択図】 図４ |
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