| 摘要 |
PROBLEM TO BE SOLVED: To smoothly and accurately sub-scan and carry a sheet body and to eliminate the influence of the curl, etc., of the sheet body by disposing a positional deviation preventing means for preventing the positional deviation in the depth direction from the optical scanning position of the sheet body between a 1st pair of rollers and a 2nd pair of rollers. SOLUTION: In a subscanning carrying means 16, a pair of carrying rollers 36 on an upstream side and a pair of carrying rollers 38 on a downstream side are disposed at a shorter distance than the length in a subscanning direction of sheet type photosensitive material while putting a recording position X where a main scanning line is formed in between. An optical scanning guide 40 is disposed at the position X between two pairs of carrying rollers 36 and 38 and a pair of presser rollers 42 is disposed between the pair of rollers 36 on the upstream side and the position X proximately to the position X. Then, the deviation in the depth direction such as floating from the position X caused by the curl of the sheet type photosensitive material is prevented by the pair of presser rollers 42, and the sheet type photosensitive material is exactly held at the position X on the guide 40.
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