| 摘要 |
A high speed apparatus and method for reorienting and assembling individual ones of flat articles, such as envelopes, into horizontal rows of articles which are vertically oriented, on edge, and stacked in facing relation. Envelopes are delivered horizontally and seriatim, to an article rotation assembly. The rotation assembly reorients the envelopes into a vertical, on-edge orientation, and feeds them individually to a helical drive assembly. The drive assembly includes a pair of parallel, counter-rotating, helical screws, mounted on a pivotally suspended sub-frame. The screws transport the envelopes in spaced relation to an accumulating conveyor. The conveyor has movable brace plate, transversely positioned over a pair of conveyor belts. A roller on one end of the plate rests upon one of the belts. Successive envelopes are delivered to and stacked against the brace plate. As the pressure increases, the sub-frame pivots away from the plate until a predetermined limit is reached. A switch then actuates the conveyor belts for a brief period, to relieve the pressure. The conveyor drive cycle is thereafter periodically repeated, until a row is formed.
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