| 摘要 |
Apparatus for feeding sheets and other flat articles, especially with varying thickness, or from stacks of varying height, includes a device called a prompter. The prompter ( 136 ) comprises a body ( 137 ), a drive roller ( 142 ), mounted on and driven by shaft ( 135 ), an opposing idler roller ( 141 ), and a ribbed belt ( 138 ) stretched around the rollers. The body pivots about shaft ( 135 ) at the driven roller end. The prompter may alternatively feed articles from a stack to a singulator or other device, or it may comprise the driver of a singulator. A prompter ( 136 ), used as driver, combines with a retarder ( 120 ), called a dancer, to form a singulator ( 133 ). The dancer moves back and forth along the article flow path ( 121 ), responsive to thickness of articles, or to pull force on an article by a downstream takeaway device, to thereby automatically adjust the gap at the nip ( 144 ) of the singulator.
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