| 摘要 |
PROBLEM TO BE SOLVED: To prevent a read image distortion by continuously stabilizing a document feed speed. SOLUTION: A document feeder comprises an upstream feed roller pair 22 and a downstream feed roller pair 24 disposed respectively upstream and downstream of an image read position P on a document feed path 13 to hold it in between, and a driving means for rotatively driving driven rollers 22a and 24a of the respective upstream feed roller pair 22 and downstream feed roller pair 24. The circumferential speed of the driven roller 24a of the downstream feed roller pair 24 is set larger than that of the driven roller 22a of the upstream feed roller pair 22.
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