| 摘要 |
PURPOSE:To obtain a copy image which is excellent in its solid uniformity and halftone reproducibility, irrespective of a kind of transfer paper, by providing a squeeze roller whose revolving speed is variable at the time of rotation. CONSTITUTION:A squeeze roller 15 is placed opposingly at a prescribed interval to a photosensitive body 1, at the upper stream side than a transfer part 25 against the rotational direction of the photosensitive body 1. The squeeze roller 15 is driven to rotate in the direction opposite to the moving direction of the surface of the photosensitive body, scrapes down a surplus developer on the photosensitive body, and controls thickness of a liquid film on the photosensitive body before a transfer. The developer consists of a toner and a solvent, and there is such as optimum revolving speed of the squeeze roller as the solvent adhesion quantity becomes minimum. Therefore, the revolving speed of the squeeze roller 15 is made variable. In such a way, even in case of transfer paper whose smoothness in inferior the image density is not lowered, and also, the solid uniformity and sharpness property are not lowered. |
