| 摘要 |
A sheet feeder (10) includes a frame (26) with an inclined surface (94) for supporting a stack of sheets to be fed and a feed roller (96) mounted on the frame (26). A retard roller (106) is mounted adjacent to the feed roller (96) and cooperates therewith to define a nip (108) for receiving a forward edge of the bottom sheet in the stack. Upright guides (116, 119) are mounted on the frame (26) and are engageable with a forward edge of a stack of sheets supported on the inclined surface (94). The guides (116, 119) are disposed at an acute angle with respect to the inclined surface (94) so that when the forward edge of the stack engages the guides (116, 119) the sheets automatically shift longitudinally relative to each other to facilitate feeding of a single sheet into the nip (108).
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