PURPOSE: To enhance relative positional accuracy between a 1st original plate and a 2nd original plate by holding a 2nd frame for holding the 2nd original plate through a 2nd sliding mechanism to a 1st frame for holding the 1st original plate.
CONSTITUTION: When a motor 40 on the supporting table 17a of the 1st frame 17 is rotated so as to rotate a screw shaft 39 in a direction opposite to the screw shaft 29, a screw follower 41 is moved along the screw shaft 39, and the 2nd frame 21 fixed on the screw follower 41 is moved in a direction shown by an arrow B. Thus, the original plate 20 is also moved to a position where it can nearly come into contact with a base material 15, and the original plates 16 and 20 which are positioned on both sides of the base material 15 are moved to a closing position. Then, the frame 21 holding the original plate 20 is held by the supporting table 17a which is the part of the frame 17 for holding the original plate 16 through the 2nd sliding mechanism 22, so that the relative positional accuracy between the original plates 16 and 20 which are brought into tight contact with both sides of the base material 15 is fixed only by the accuracy of the mechanism 22, and it is not influenced by the 1st sliding mechanism 19 for holding the frame 17. Thus, the deviation between the original plates 16 and 20 can be reduced.
HASHIMOTO HIROYUKI
WATANABE KAZUO
