| 摘要 |
A method and apparatus for selectively increasing the effective frictional force between a retard member and a feed member by making both the feed member and retard member from conductive elastomers, and providing a source of electrical potential to produce an electrical potential between them. A sensor is located downstream of the retard member that will sense a multi-feed of sheets between the pad and retard member. The sensor effects the production of electrical potential thereby increasing the friction between the two members and causing separation of the multi-feed of sheets. The potential is then removed and the frictional forces returned to the original level.
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