| 摘要 |
PURPOSE:To obtain required printed matter or copies efficiently in either of printing/copying modes on a short time by dividing a photoengraving stage for making a printing master to stages for forming and fixing toner images, and executing both stages at different scanning speeds. CONSTITUTION:In a printing mode, the original images on a plate 14 are exposed 5 on photosensitive paper 2 which is a printing master, and the electrostatic latent images thereof are developed 7. The scanning up to this developing is accomplished at 100mm./sec-200mm./sec speed. Upon completion of developing, the peripheral speed of a rotary drum 1 is changed over to 20mm./sec-50mm./sec and the toner images on the paper 2 are fixed with a flash fixing device 10, whereby the photoengraving stage is finished. In a printing stage, the drum 1 is driven at 300mm./sec-500mm./sec, and the paper 2 is destaticized 3 and electrified 4. After exposure 6, the images are developed 7, are transferred 8 on transfer paper 11 and are fixed 12. On the other hand, in a copying mode, the drum 1 is driven at 100mm./sec-200mm./sec, and the toner images on the paper 2 are transferred 8 and are fixed 12. |
