| 摘要 |
PURPOSE:To know only form size regardless magnification to indicate an original size corresponding to the form size by projecting light from a light emitting means provided near a photosensitive drum upon aside of an original platen part via an image exposure lens. CONSTITUTION:Form size is detected to respond a light emitting diode within a light emitting diode group 14 provided near the exposure part of a photosensitive drum 5 which corresponds to image formation width to turn on. Its light is projected on a display part 7 of an original platen part through a lens system 11 for projecting an image of an original on an original platen glass 8. At this time, the indicated width of the light emitting diode light is varied according to the magnification of the lens system 11, so the original size matched with the magnification and form size is displayed on the display part 7 automatically. |
