| 摘要 |
PURPOSE:To prevent the dirt of a head, by spreadibg a protective film locked with both ends at a protective film storage section and a protective film winding section provided by clipping the optical head so that the protective film can be tightly stuck on the entire surface of the emitting end of the optical head. CONSTITUTION:The device consists of a photosensitive drum 1 rotating toward the arrow A and an optical head 2 extending to drum shaft arranged at a position close and oppsite to the circumference of the drum 1. Further, the device consist of a protective film winding shaft 3 located in parallel with the optical head 2 up and down in the figure of the optical head 2, a protective film storage shaft 4, a protective film 5 which is wound around the storage shaft 4, the open end is supported with the shaft 3, and the intermediate part is spread between the shafts 3 and 4, and masks 6 and 7 respectively provided up and down the optical head 2 between the protective film 1 and the photosensitive drum 1. |
