| 摘要 |
The sheet feeder of a recorder includes a sheet support, a shaft extending over the support, a feed roller rotatable on the axis of the shaft, and collars mounted rotatably around the shaft. Disks may be formed on the shaft. Each of the collars is supported rotatably on one of the disks. The inner periphery of at least one of the collars in the widthwise middle area of the support is spaced from the periphery of the associated disk. Even if the support is curved in such a manner that it is convex toward the roller, the distance between the shaft axis and the point or line where the at least one of the collars is in compressive contact with the top one of the sheets stacked on the support is shorter than the distances between the axis and the points or lines where the collars near the lateral ends of the support are in compressive contact with the top sheet. All of the collars can keep the roller and the sheet spaced at a predetermined distance from each other. Consequently, the sheets can be fed properly.
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