| 摘要 |
An improved recirculating document feeder for presenting sheets from a document sheet stack individually to a station of the reproduction apparatus for reproducing of information contained on such sheets. The improved recirculating document feeder comprises a support for a document sheet stack with a selected side of each document sheet facing up and with the selected side of the topmost document sheet in said stack for ready viewing. A feed path extends away from the then back to the document stack support, for directing sheets from the support into association with the reproducing station and then back to the stack, the feed path defining with the support a closed-loop that inverts a sheet and directs the sheet into association with the reproducing station selected side down and then inverts the sheet again and directs the sheet to the top of the stack selected side up. Document sheets are selectively fed from the stack seriatim about the feed path. A registration assembly, including a driven rotatable roller and a gate, are supported for movement between a position in operative association with the reproducing station and a position remote therefrom. The roller and gate are selectively moved to the operative position for registering a sheet in association with the reproducing station in a cross-track direction transverse to the feed path when the assembly is in its operative position.
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