Dual Duplex Trays in an Electrophotographic Copier
Original Publication Date: 1979-Dec-01
Included in the Prior Art Database: 2005-Feb-20
Previously known techniques for making duplex copies, i.e., double-sided copies, from simplex original documents either involved sorting of the original documents by hand or sorting automatically by a recirculating automatic document feeder (RADF). Sorting by hand is time consuming and can be confusing to an operator. Sorting automatically by an RADF involves imaging every other original document that is passed over a document viewing glass in order to maintain proper page sequence on the duplex copies. This latter technique doubles the amount of cycling time, resulting in a possible 50% loss in copy throughput. This article describes a technique that eliminates the foregoing problems by allowing imaging of every simplex original document automatically and in sequence.