Browse Prior Art Database

PRINTER SEMI-IMMEDIATE DUPLEX PATH WITH HALF-HELIX INVERSION

IP.com Disclosure Number: IPCOM000025932D
Original Publication Date: 1989-Feb-28
Included in the Prior Art Database: 2004-Apr-04
Document File: 2 page(s) / 66K

Publishing Venue

Xerox Disclosure Journal

Abstract

It is known to provide a printer with an Electronic Front End (EFE) document page input and an endless loop duplexing path for copy sheets printed on one side to be returned to the image transfer station to be printed on their opposite side to provide duplex output as in the Xerox Cor oration 9700'" ,813'" duplex

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(EROX DISCLOSURE JOURNAL

PRINTER SEMI-IMMEDIATE DUPLEX Proposed Classification

WITH PATH Paul F. Morgan HALF-HELIX INVERSION U.S. C1.355114SH

Int. C1. G03g 15/00

It is known to provide a printer with an Electronic Front End (EFE) document page input and an endless loop duplexing path for copy sheets printed on one side to be returned to the image transfer station to be printed on their opposite side to provide duplex output as in the Xerox Cor oration 9700'" ,813'" duplex

Disclosure Journal Vol. 8, No. 1, Januarymebruary 1983, page 7.) For other such endless loop duplex paths in copiers with conventional document input and optics, e.g., US. Patent No. 4,660,963 and other references cited therein. These systems use an inverter in their duplex path for reversing the direction of motion and head-to-tail orientation of the copy sheet so that both sides of the duplex copy will have the same image orientation.

closely pitch. P ollow one another within the duplex loop, i.e. with a small inter-copy

Volume 14 Number 1 January/February 1989 27

P or many years. (See Xerox

However, if the EFE electronically inverts the input image for the opposite side, then such a conventional inverter can be eliminated, and instead a completely unidirectional endless loop duplexing path can be used which contains only a smooth integral half-helix sheet turnover or rotation inversion (known per se) as an integral part of this sheet path. That simplifies the duplex ath, potentially reduces i...