| 摘要 |
PROBLEM TO BE SOLVED: To easily remove dirt and dust accumulated in an opening for exposing a data imprinting liquid crystal panel. SOLUTION: An exposure hole 40 is formed in a data imprinting module 38. The liquid crystal panel 39 is exposed to the outside of the data imprinting module 38 through the exposure opening 40a of the exposure hole 40. The opening 40b of the exposure hole 40 is formed so that the opening area of the opening 40b is larger than that of the exposure opening 40a. A tapered surface 40c is formed at a part for connecting the exposure opening 40a and the opening 40b. Since the tapered surface 40c is formed, the dirt and dust are hardly accumulated in the exposure hole 40, and the dirt and dust are easily removed by blowing the exposure hole 40 by an air brush, etc., if any.
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