An image forming apparatus,-in which an ink sheet is superimposed onto an image receiving sheet and subjected to imagewise exposure to light to allow an image in the ink sheet to transfer to the image receiving sheet to form an image is disclosed, comprising a drum, an exposure device, a detecting device...http://www.google.es/patents/US6341904?utm_source=gb-gplus-sharePatente US6341904 - Image forming apparatus and image forming process
