| 摘要 |
PURPOSE:To run a light source for exposing in compliance with the length of an original and to improve copying performance by providing a detector of original sizes consisting of plural photosensors disposed on the side opposite to the light source. CONSTITUTION:Photosensors 6a-6d are disposed in conformity with the size of an original along the traveling direction of a traveling body 8. When the body 8 is run in an arrow direction and the original is irradiated by a light source 9, transfer paper 3 conforming to the size of the original is interposed between the light source 9 and the photosensors 6a-6d; therefore, one of the photosensors 6a-6d conforming to the length of the original operates and the output thereof is fed through a control part 7 to a driving mechanism 13, so that the body 8 is controlled so as to travel the detected distance. The copying performance is thus improved with the simple construction. |
