| 摘要 |
PURPOSE:To prevent a developer from adhering to an area which is not used for copying by providing an adjusting means for cutting off a side end part of a transmitting light and adjusting a width of an image formed on a photosensitive body, between a negative film and the photosensitive body. CONSTITUTION:A slit plate 31 for cutting off a side end part of a transmitting light and adjusting a width of an image formed on a photosensitive body 5 is extended in the axial direction of the photosensitive body 5 between a negative film 4 and the photosensitive body 5. Also, in both end parts of the slit plate 31, adjusting dials 32, 33 are supported so as to be rotatable, respectively. When the adjusting dials 32, 33 are turned, adjusting plates 34, 35 are brought to approach or separate from each other in a parallel state, and a slit width suitable for a density of the negative film 4 can be obtained. Accordingly, it is prevented that a developer adheres to an area which is not used for copying of the photosensitive body, and a life of a cleaning device can be extended. |
