Browse Prior Art Database

UPHILL PAPER TRAY STACKER

IP.com Disclosure Number: IPCOM000025044D
Original Publication Date: 1983-Jun-30
Included in the Prior Art Database: 2004-Apr-04
Document File: 2 page(s) / 75K

Publishing Venue

Xerox Disclosure Journal

Abstract

A document sheet output stacker particularly suited for collecting intermixed original document sheet sizes copied in a fixed optics slit/moving document copying mode utilizing an "uphill" stacking tray 1 (so that ejected sheets slide back to a trail edge stop surface 2 below the platen level) and a llD" shaped (eccentric) intermittent feed sheet ejector roller or rollers 3.

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CEROX DISCLOSURE JOURNAL

UPHILL PAPER TRAY STACKER Proposed William R. Hunt Classification

U.S. Cl. 271/202 Tnt. Cl. R65h 29/66

A document sheet output stacker particularly suited for collecting intermixed original document sheet sizes copied in a fixed optics slit/moving document copying mode utilizing an "uphill" stacking tray 1 (so that ejected sheets slide back to a trail edge stop surface 2 below the platen level) and a llD" shaped (eccentric) intermittent feed sheet ejector roller or rollers 3.

This overcomes a problem in stacking sheets of intermixed lengths as compared to a downhill or horizontal catch tray. The lead edge of a sheet entering a downhill tray can snub against the trail edge of sheets already stacked in the tray, particularly short sheets. This snubbing action can cause the entering sheet to buckle and roll over, or even roll out of the tray.

The uphill paper stacking here avoids the snubbing action of sheets entering the catch tray. Sheets already in the tray 1 stack downhill against their trail edges, and the entering sheet is ejected uphill with a limited velocity so that its trail edge does not pass beyond the lead edge of the shortest stacked sheets. Thus, once the entering sheet is in the tray, it slides downhill on top of the stack and stacks against its trail edge.

The I'D" shaped roller 3 has its flat face 4 normally positioned above the feed plate 5 (which may be an extension of the platen) about !&If to provide a normally unrestri...