| 摘要 |
PURPOSE:To obtain a good copy by setting an area which is not erased taking the size of transfer paper, the size of an original, the trimming size and magnification of copying into consideration and erasing the latent image outside of the area which is not to be erased. CONSTITUTION:For instance the length in the direction x of an area which is not erased is made to a length made by overlapping of the length (x) of a copying paper 10 in the direction (x), the length in the direction (x) after changing magnification OxXR basing on the length Ox of an original 4 and the length in the direction (x) after changing magnification TxXR basing on the trimming size Tx, to be concrete, to the smallest length TxXR. On the other hand, the same applies to the length in the direction (y) of the unerased area 49, and made to the length made by overlapping of the length, in the direction (y), Py of the copying paper 10, the length, in (y), OyXR after varying magnification basing on the length Oy of the original 4 and the length, in the direction (y), TyXR after varying magnification basing on the trimming size Ty, to be concrete, to the smallest length Py. Thus, the area not to be erased 48 is set, and when erasing the electrostatic latent image on the photosensitive body 1 by an eraser 7, the eraser is controlled to erase outside of the area not to be erased 48. |
