Browse Prior Art Database

FULL PRODUCTIVITY SINGLE PASS DUPLEX WITH TWO SPEED FUSER FOR NORMAL POWER CONSUMPTION

IP.com Disclosure Number: IPCOM000026959D
Original Publication Date: 1994-Aug-31
Included in the Prior Art Database: 2004-Apr-07
Document File: 2 page(s) / 84K

Publishing Venue

Xerox Disclosure Journal

Abstract

A one-pass-duplex fusing system is proposed wherein, a dual fuser is run at two different speeds to significantly reduce energy consumption. As shown in the Figure, the fuser system 10 comprises a dual, heated, two speed fuser 20 that is capable of running at a first speed to fuse single sided copies and also, at one half that speed to fuse duplex copies. The slower fuser speed reduces the energy consumption of the fuser 20. It does not, however, reduce the throughput of the device in the duplex mode which, due to the configuration, is one half the rate of the throughput of the simplex mode. An intermediate transport belt 24 is included to transfer developed images from a photoreceptor belt 34 to a copy substrate 30. An air plenum 22 transports the two-sided, unfixed image bearing copy substrate 30 from the intermediate transport belt 24 to the two speed fuser 20. Forced air is used as an air knife to assist in stripping the copy substrate 30 from the intermediate transport belt 24. The air plenum 22 is necessary to accommodate the speed differential of the photoreceptor belt 34 and the intermediate transport belt 24, and the fuser 20, when it is actuated at the slower speed. The air knife and a detack corotron 26 are arranged to strip the copy substrate 30 during transition from the intermediate transport belt 24 and the air plenum 22, which is an area relatively free of shear force. The overall advantages of the proposed one-pass-duplex fusing system include: a reduction in the sheet curl normally associated with single pass duplex operation, a reduction in buffer memory requirements due to a relatively smaller number of sheets in motion when compared to other systems, and the adaptability of the proposed system to low cost printers.

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Page 1 of 2

XEROX DISCLOSURE JOURNAL

FULL PRODUCTIVITY SINGLE Proposed Classification PASS DUPLEX WITH TWO SPEED
FUSER FOR NORMAL POWER
CONSUMPTION
Venkatesh H. Kamath
Michael A. Malachowski

U.S. C1.355/285 Int. C1. G03g 15/20

XEROX DISCLOSURE JOURNAL - Vol. 19, No. 4 July/August 1994 319

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

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FULL PRODUCTIVITY SINGLE PASS DUPLEX WITH TWO SPEED FUSER FOR NORMAL POWER CONSUMPTION(Cont'd)

A one-pass-duplex fusing system is proposed wherein, a dual fuser is run at two different speeds to significantly reduce energy consumption. As shown in the Figure, the fuser system 10 comprises a dual, heated, two speed fuser 20 that is capable of running at a first speed to fuse single sided copies and also, at one half that speed to fuse duplex copies. The slower fuser speed reduces the energy consumption of the fuser 20. It does not, however, reduce the throughput of the device in the duplex mode which, due to the configuration, is one half the rate of the throughput of the simplex mode. An intermediate transport belt 24 is included to transfer developed images from a photoreceptor belt 34 to a copy substrate 30. An air plenum 22 transports the two-sided, unfixed image bearing copy substrate 30 from the intermediate transport belt 24 to the two speed fuser 20. Forced air is used as an air knife to assist in stripping the copy substrate 30 from the intermediate transport belt 24. The air plenum 22 is necessary to accommodate th...