| 摘要 |
PURPOSE:To fix a space between an exposure head and a photoconductor film while preventing the destruction of the base body of the photoconductor film so as to improve photographic printing quality in an image forming device of an optical back face exposure system. CONSTITUTION:A bag filled with a viscous fluid 22 is disposed between a flange 10 for supporting an exposure head 18 and the inner peripheral surface of a base body 2. With pressing force from the viscous fluid 22, the flange 10 is brought into close contact with the inner peripheral surface of the base body 2 on the developing roller 4 side so as to fix the distance between the exposure head 18 and a photoconductor film. |
