Browse Prior Art Database

ANTI-REVERSING MECHANISM

IP.com Disclosure Number: IPCOM000026550D
Original Publication Date: 1992-Oct-31
Included in the Prior Art Database: 2004-Apr-06
Document File: 2 page(s) / 113K

Publishing Venue

Xerox Disclosure Journal

Abstract

An output paper handling system modification that employs an anti-reversing mechanism which prevents "drag-in" jams and improves duplex printingkopying operation is disclosed. The anti-reversing mechanism may be a plied to conventional paper output housings and output housings which can o k set.

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XEROX DISCLOSURE JOURNAL

ANTI-REVERSING MECHANISM Proposed John Fredrick Derrick Classification

U.S. C1.271/184 Int. C1. B65h 29/00

XEROX DISCLOSURE JOURNAL - Vo1.17 Xo. 5 September/October 1992 287

[This page contains 1 picture or other non-text object]

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ANTI-REVERSING MECHANISM (Cont'd)

An output paper handling system modification that employs an anti-reversing mechanism which prevents "drag-in" jams and improves duplex printingkopying operation is disclosed. The anti-reversing mechanism may be a plied to conventional paper output housings and output housings which can o k set.

The anti-reversing mechanism comprises output housing 1, output tray 2,
drive roll 3, deflector bump 4, and mylar fingers 5. The deflector bumps 4 and mylar fingers 5 positioned in front of reversing drive rolls 3 of output trays 2 of copier and printing machines prevent "drag-in" jams in machines that use the output tray to reverse copy sheets for duplex operation.

For proper paper orientation for duplex operation a sheet must be reversed. This places a lead paper edge correctly on both sides of the sheet.

Reversing the sheet may be accomplished at a set of nips using a bidirectional motor and a passive baffle. To conserve paper path length a reversing operation is best done in the output tray and by reversing the output nip rolls.

A problem arises, however, when there are sheets in the output tray. Sheets in the tray are pulled back into the nip by the reversing rolls. This results in a paper jam. These jams are referred to as drag-in jams. Dra...