| 摘要 |
PROBLEM TO BE SOLVED: To reliably prevent any double feed in a sheet feeder which feeds a sheet-like medium between a feed roller and a separating member pressed against the feed roller, and separates and feeds the sheet-like medium held between the feed roller and the separating member one by one making use of the difference in the coefficient of friction among the feed roller, the separating member and the sheet-like medium. SOLUTION: The sheet-like medium S is separated and fed while applying the periodic change in the pressure between the feed roller 1 and the separating 2.
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