| 摘要 |
PURPOSE:To eliminate the complexity of a constitution and to facilitate adjustment, maintenance, etc., by exposing photosensitive drums of a tandem constitution alternately by switching one exposing part, and forming a visible image during two rotations of a drum with two-color toner and transferring it to the same recording form successively. CONSTITUTION:The exposing part 49 is controlled with a latent image formation signal and the 1st-the 4th latent images are formed on the photosensitive drums 31 and 32 at every page of a recording form 50 while switched by an optical path switch 48. The 1st and the 2nd color toner images formed on the drum 31 are transferred to the form 50 by a transfer part 36 at a time while the 3rd and the 4th color toner images are formed on the drum 32, and the 3rd and the 4th color toner images on the drum 32 are transferred to the same form 50 by a transfer part 43 at a time while the 1st and the 2nd color toner images are formed. Consequently, the complexity of the constitution is eliminated and the manufacture, the adjustment, the maintenance, etc., are facilitated. |
