Original Publication Date: 1987-Jun-30
Included in the Prior Art Database: 2004-Apr-04
Xerox Disclosure Journal
When copying a multi-page document, it is known to feed the pages to the copier in 1-N order. Because the copier usually ejects sheets with the copy side up, du lex copy sheets would be correctly collated but simplex copy sheets would i
XEROX DISCLOSURE JOURNAL
SHEET-STACKING APPARATUS Proposed Classification Denis J. Stemmle U.S. C1.271/291
Int. C1. B65h 39/10
When copying a multi-page document, it is known to feed the pages to the copier in 1-N order. Because the copier usually ejects sheets with the copy side up, du lex copy sheets would be correctly collated but simplex copy sheets would i e stacked N-1 order from the top, thus necessitating an inversion process to be carried out on the individual sheets of the stack to obtain the desired 1-N sheet order of the original document. It is also known to use a stacker which is bottom fed. In such a case, simplex copy sheets will be stacked in the desired sheet order a6 initio, but duplex copy sheets will have to be inverted for correct collation.
To remedy the above complications, a sheet stacking apparatus is shown in the Figure for stacking sheets fed seriatim from an inlet for receiving copy sheets exiting a reproduction machine. The apparatus includes first and second sets of co-acting driven output roller pairs associated respectively with alternative inverting ( 32a and 32b 1 and non-inverting ( 3a and 3b ) copy sheet paths, two coaxial discs 8 each having an arcuate slot 9 communicating at one end with the disc periphery, and diverter means 7 selectably movable between first and second positions. The diverter in the first position is arranged to direct each sheet issuing from inlet roller pair 2 so that its lead edge enters the slots in th...