| 摘要 |
A self-contained offset stacker tray assembly is operable in conjunction with the sheet output of a host printer or copier to receive sheets from the host machine and deposit the sheets in offset sets. The assembly includes a supporting base for a frame structure reciprocable transversely of the direction of sheet infeed from the host and containing a receiver tray, infeed rolls to supply sheets to the trays, a rotary cam mechanism for shifting the frame assembly relative to the output from the host machine and the receiver tray being vertically movable within the frame structure and biased upwardly by counter balancing springs to be moved downwardly as the weight of the sheets in the tray increases.
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