| 摘要 |
PROBLEM TO BE SOLVED: To prevent deterioration in reading accuracy of a white reference original and an ordinary original due to dirt on a press contact face with the original in a read sensor section and an original retaining member. SOLUTION: A winding roller 4 is placed freely turnably at an upper-stream side of a platen roller 3 in an original carrying direction shown in the arrow A, the outer end of a cleaning sheet 5 whose one end is open is fixed to a circumferential face with a screw 10, and the cleaning sheet 5 is wound and contained on the circumferential face of the winding roller 4 in a range of not in contact with the screw 10. The turning of the platen roller 3 in both forward/reverse directions is selectively delivered to the winding roller 4 through a turning delivery mechanism 9 comprising a belt 9d stretched over a couple of pulleys 9a, 9b and a clutch 9c to insert/withdraw the cleaning sheet 5 to/from an original read position P at which contact glass 21 of a read sensor section 2 is in contact with part of the circumferential face of the platen roller 3. The cleaning sheet 5 is in contact with the circumferential face of the platen roller 3 and an upper face of the contact glass 21 in contact with the original to clean them.
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