| 摘要 |
A sheet feeder including a hopper that holds a sheet in a stack, a sheet feed roller that touches the sheet on the hopper and feeds the sheet in a sheet feed direction, a face provided on a front end of the hopper with respect to the sheet feed direction so that a leading edge of the sheet being fed bumps into the face, and a plurality of protrusions that are disposed on the face and bump into the leading edge of the sheet when the sheet is fed, wherein each one of the protrusions is placed in a line parallel to the sheet feed direction and is separated from each other in a direction perpendicular to the sheet feed direction.
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