| 摘要 |
PROBLEM TO BE SOLVED: To make an exposure device preventable the heat generation of an air suction means and the thermal influence to the outside with a simple structure. SOLUTION: This exposure device has a drum 31 which has plural through- holes 31c penetrating its peripheral wall from an external space to its internal space, the air suction means 200 which sucks air from the internal space of the drum 31, a rotating means 700 which rotates the drum 31, a feeding means 400 which feeds a sheet P to the drum 31 and an exposure means 300 which exposes the sheet P held on the outer peripheral surface of the drum 31. The sheet P fed by the feeding means 400 is held on the outer peripheral surface of the drum 31 by the air pressure difference between the external space and internal space generated by suction by the air suction means 200 and the sheet P held on the outer peripheral surface of the drum 31 is exposed by the exposure means 300. The air suction means 200 has an air suction pump 201, a pipeline 202 for communicating from the internal space of the drum 31 to the air suction pump 201 and a container 203 for housing the air suction pump 201. The exhaust air from the air suction pump 201 is mixed with outdoor air in the container 203 and is discharged.
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