| 摘要 |
PURPOSE:To extremely improve the plane holding performance of a negative plate, by holding the negative plate between an adsorbing base plate and a glass plate and exhausting the remaining air through a prescribed air path and with use of an air pump. CONSTITUTION:A transparent glass plate 1 and an sucking base plate 2 are provided. The plate 1 can be opened and closed freely with a fulcrum 8, and a negative plate is held between the plate 1 and the plate 2 to be press-fixed. An air path 5 having air holes 4 is incorporated into the plate 2, and a prescribed suction pump is actuated via an air exhaustion hole 6. Thus the the air remaining between the plates 1 and 2 is exhausted. As a result, the negative plate is sucked to the plate 1. In such way, the plane holding performance of the negative plate can be extremely improved. |
