paper (e.g., five sheets of paper) are continuously supplied from a paper supply tray, a toner image formed on a photosensitive drum is continuously transferred onto a first or front side of the paper and the toner image is fixed onto the paper. Thereafter, the paper is reversed by the ADU, and circulatorily conveyed towards the transfer region where another toner image formed on the photosensitive drum is transferred onto a second or back side of the paper, fixed to the paper, and then the paper is discharged to a discharge tray, so that plural sheets of paper are not stacked at a time in an intermediate tray.
FIG. 1 shows, in an illustrative view, an example of the structure of such image forming apparatus.
A copier as an exampleimage transferred thereon from the photosensitive drum 31 by effecting an AC corona discharge to remove the charge; cleaning means 37 for cleaning the photosensitive drum 31 after the transferring process has been concluded; a fixing device 38 of heating roller type for fixing the toner image on the paper; and the reverse/discharge/paper resupply section 6 and the ADU 8.
The photosensitive drum 31, which is rotated in a direction shown by an arrow by appropriate drive means, is sequentially electrified by the electrifier 32, the electrostatic latent image is formed by dot exposure by the laser writing system 33, and the toner image is formed by the developer 34. Then, the toner image is transferred via the action of the transfer electrode 35 onto the paper that is