| 摘要 |
<p>PURPOSE:To suck and support even a paper having a complicated shape regardless of the size and the shape of the paper by providing spherical bodies inside plural suction holes and constructing the suction hole so that its aperture may be smaller than the diameter of the spherical body on the paper suction surface of a paper supporting body and a surface on a chamber side. CONSTITUTION:The plastic spherical body 25 is disposed inside the suction hole 23 of a drum 20. The diameter of the spherical body 25 is larger than the small diameter part of the suction holes 23a and 23b, and smaller than the diameter of a large diameter part and an escape hole 23c, so that the spherical body 25 can move inside the suction hole 23 but does not drop. The spherical body 25 is sucked to the inner peripheral side of the suction hole 23b and tightly closes the suction hole 23 at the suction hole 23 whose suction surface is not blocked by a photosensitive paper 10. At the suction hole 23 whose suction surface is blocked by the photosensitive paper 10, the photosensitive paper 10 is sucked and tightly closes the suction hole 23. When the photosensitive paper 10 wraps around the first half part of the suction hole 23 with the rotation of the drum 20, the chamber 27b is made in a negative pressure state and the first half part of the photosensitive paper 10 is sucked.</p> |
