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IMMEDIATE DUPLEX FOR ONE AND ONE-HALF OR TWO-CYCLE XEROGRAPHY

IP.com Disclosure Number: IPCOM000025626D
Original Publication Date: 1986-Oct-31
Included in the Prior Art Database: 2004-Apr-04
Document File: 2 page(s) / 63K

Publishing Venue

Xerox Disclosure Journal

Abstract

This is an "rmrnediate" duplex (2-sided) copying system applied to a 2-cycle copier such as disclosed in U S Patent No. 4,372,669 The first side copy is made in one cycle of the xerographic drum or belt and fused Then, whlle the two-cycle xerographic processor is in its next or cleaning cyLle, whlch IS normally a "dead time" in which no copies are being made, that copy sheet with the first side copy thereon is reversed in the exit rolls of the copier and fed back directly and immediately to the photoreceptor for the sewnd side image during this cycle The copy sheet may be passed through the optical path during this dead or cleaning cycle time of the two-cycle processor since no image is being formed This type of duplexing, known as "immediate" duplex, normally has a disadvantage In the tlme required to remove, fuse, turn over, and return the same copy sheet back to the photoreceptor Here this does not result in any additional time delay because in the case of the two-cycle copier all of these steps are accomplished during the existing delays for the alternate non-copying circulations of the photoreceptor inherent in a twrb cyvle copying system

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XEROX DISCLOSURE JOURNAL

IMMEDIATE DUPLEX FOR ONE AND ONE-HALF OR TWO-CYCLE XEROGRAPHY Int. C1 G03g 15/00 Denis J Sternmle

Proposed Classification US. C1 355/14SH

This is an "rmrnediate" duplex (2-sided) copying system applied to a 2-cycle copier such as disclosed in U S Patent No. 4,372,669 The first side copy is made in one cycle of the xerographic drum or belt and fused Then, whlle the two-cycle xerographic processor is in its next or cleaning cyLle, whlch IS
normally a "dead time" in which no copies are being made, that copy sheet with the first side copy thereon is reversed in the exit rolls of the copier and fed back directly and immediately to the photoreceptor for the sewnd side image during this cycle The copy sheet may be passed through the optical path during this dead or cleaning cycle time of the two-cycle processor since no image is being formed This type of duplexing, known as "immediate" duplex, normally has a disadvantage In the tlme required to remove, fuse, turn over, and return the same copy sheet back to the photoreceptor Here this does not result in any additional time delay because in the case of the two-cycle copier all of these steps are accomplished during the existing delays for the alternate non-copying circulations of the photoreceptor inherent in a twrb cyvle copying system

Volume 11 Number 5 September/October 1986 249

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XEROX 2 50 DISCLOSURE JOURNAL

Volume 11 Number 5...