| 摘要 |
The invention is relates to a simple, inexpensive high capacity output catch tray for copiers and other document production machines. The output tray automatically increases in capacity as the stack of copies in it accumulates, without external power source or control, while maintaining a relatively constant elevation relative to the copier output port, and automatically returns to its original position when partially or completely unloaded. The invention uses a trampoline-type arrangement that suspends a stack support platform by springs around its perimeter from a frame removeably attached to the copier. As copies accumulate on the platform the weight of the copies causes the springs to stretch and increases the capacity of the output tray. The springs act as energy-storing biasing elements which return the platform to its unloaded position when the stack of copies is removed from the tray, and may also act as variable length alignment surfaces to keep the accumulating stack neat and square.
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