| 摘要 |
PURPOSE:To execute easily a picture formation of a part of an original by only making a part which requires a picture formation of the original conform with a picture formable area, by providing a variable means for making its picture formable area variable, on an original placing surface. CONSTITUTION:An original 5 is placed on an original placing surface 4 and a lamp switch 12 is turned on, and thereafter, the first adjusting knobs 10a, 10b are operated. Subsequently, when the second adjusting knobs 11a, 11b are operated, its moved voltage portion is connected to a microcomputer 23 from analog/ digital converting circuits 22, 22, and by its voltage difference portion, the surface of a photosensitive body 13 is electrified extending over a range from P1 to P2. As a result, the surface of the photosensitive drum 13 corresponding to an oblique line part S surrounded by the first frame crosspieces 6a, 6b and the second frame crosspieces is electrified, and the original 5 placed on the original placing surface 4 is copied only in the oblique line part S. |
