| 摘要 |
PURPOSE:To improve light shielding workability, by providing light shielding means on both sides of the glass plate of a composer holder. CONSTITUTION:Light shielding films 25 which are positioned on the surface of the light-transmittable glass of a composer holder 21 having a rubber packing 22 for vacuum on the outside circumference, on the side of a light source 24 and moves forward and backward from the four sides near the outside circumference toward the center. Light shielding bodies 26 which are positioned on the surface on the side opposite to the light source 24 and move forward and backward from the four sides near the outside circumference toward the center in synchronization with the films 25 are provided. An original film 36 is brought into tight contact under vacuum with the machine plate 34 supported on a support plate 33 and is exposed successively. Two sheets among four sheets of the films 25 and two sheets among four sheets of the light shielding bodies are projected to cover the parts except the required part and the film is printed. Since the films 25 do not relate to the vacuum, the forward and backward movement thereof is easy. |
