| 摘要 |
PURPOSE:To eliminate out-of-focus in the stage of partial image erasing copying by inserting a patternless film for correction of optical path into the optical path in the stage of ordinary copying and inserting an image erasing pattern film thereinto in the stage of partial image erasing copying, selectively. CONSTITUTION:Pattern film holders 44A-44F provided with a patternless film 45 for correction of potical path and various image erasing pattern films 46 freely attachably and detachably are mounted to a multiarm body 41 near the top end of a revolving shaft 40. In the stage of ordinary copying, an operating part 42 is operated to set the film 45 so as to be positioned in the optical path between the condenser lens and photosensitive drum of the copying machine, and copying is carried out. In the case of partial image erasing copying, the part 42 is operated to rotate the shaft 40 so as to bring the film 46 on the optical path, and an image erased copy is obtained. Then always sharp copies are obtained without out-of-focus in the stage of image erasing copying and ordinary copying. |
