| 摘要 |
PURPOSE:To form a photosensitive layer uniformly on the substrate of a photosensitive body by reducing the section of a dip coating vessel gradually toward the bottom of the vessel in a device for forming the photosensitive layer on the substrate by the dip coating process. CONSTITUTION:The wall of the dip coating vessel 1 is inclined linearly or exponentially so as to gradually decrease the sectional area of the vessel 1 toward its bottom. A coating soln. 2 of beta-type copper phthalocyanine or p- diethylaminobenzaldehyde-diphenylhydrazone, or the like is filled in the vessel 1, the substrate drum 3 of the photosensitive body is dipped into the soln. 2, then, pulled up at a constant speed, and the attached coating film is dried. Since the sectional area of the vessel 1 is reduced toward the bottom, even when the pulling up speed is constant, this relative pulling up speed is practically continuously changed, thus permitting the photosensitive layer to be formed uniformly on the substrate drum 3 of the photosensitive body. |
