| 摘要 |
The disclosure relates to separating and feeding previously printed document sheets from a stack with reduced inter-sheet document image smearing using a retard-type sheet separator-feeder. For duplex documents, the intermittent drive system for the retard feeder drives the sheet being fed downstream out of the retard nip for only a short initial feeding distance which is only a minor portion of the document dimension, then reverse drives the sheet in the upstream direction for only a short reverse distance sufficient to eject all the sheets from the retard nip other then the one being fed out. Meanwhile a nudger system feeding sheets from the stack to the retard nip is disengaged. Then the feeder is driven in the downstream sheet feeding direction again, but for a much longer sheet feeding distance, Thus, the sheet being fed by the retard feeder may be fed out of the retard nip without duplex document image smearing against other sheets in the retard nip.
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