Browse Prior Art Database

Original Publication Date: 1988-Feb-29
Included in the Prior Art Database: 2004-Apr-04

Publishing Venue

Xerox Disclosure Journal


An auxiliary non-recirculating but automatic document feeder (ADF) 1 that can be used for feeding either single documents from a single stack in the long-edge-feed direction, or for feeding two 83" x 11" documents simultaneously from two stacks 2a and 2b in the short-edge-feed direction as illustrated in Figs. 1 and 2. Feeding two documents simultaneously to a copier platen to make one copy therefrom is known as "two-up" copying. (See, e. g., IBM U. S. Patent No. 4,052,054.) Two friction retard feeders 3a and 3b enable simultaneous feeding of documents from the two stacks 2a and 2b in the two-up mode. One of these same feeders 3a or 3b may be utilized for feeding small single documents from one stack in the long-edge-feed direction, or for feeding full-size 11" x 17" originals long-edge-first by using both feeders 3a and 3b to feed each single document. This auxiliary feeder 1 accesses the platen 4 here through a conventional recirculating document handler (RDH) 5 mounted over the platen 4. Specifically, the ADF 1 feeds sheets into the RDH 5 through the latter's semi-automatic input 6. This input 6 is the normally manual single sheet-feeding non-recirculation or by-pass document path of the RDH 5.