| 摘要 |
PURPOSE:To erase securely an unnecessary latent image forming a side image, etc., at the boundary part between an image area and a no-image area by turning on a fixed light emitting element partially according to copy magnification and the size of an original and erasing the latent image of the no-image area, and moving a moving light emitting means to a specific position. CONSTITUTION:When an original having length L and width W is reduced to M and copied, a control part calculates the width W.M of the image area delta on a photosensitive body 1 and outputs a movement signal to a pulse motor 12 for a corresponding time, and an LED indenter 8 moves to a specific position. Then, the control part outputs a light emission signal to a specific light emission block 7 of the fixed light emitting mean 2 and the LED indenter 8 for the time calculated from the length L.M of the image area delta and the moving speed of a photosensitive body 1, so that their light emission diodes 6 and 9 turn on. Consequently, the diode 6 turns on over a constant area S1 for the no-image area gamma to erase an unnecessary latent image, and the diode 9 turns on over the constant area S2 of the boundary part between the image area delta and no-image area gamma to erase an unnecessary latent image. |
