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MOISTURE RESTORATION OF XEROGRAPHIC COPIES

IP.com Disclosure Number: IPCOM000025730D
Original Publication Date: 1987-Aug-31
Included in the Prior Art Database: 2004-Apr-04
Document File: 2 page(s) / 79K

Publishing Venue

Xerox Disclosure Journal

Abstract

paper, a toner image is trans fp erred to the paper which is subsequently passed In the conventional xerogra hic process for producing copies or prints on through the fusing operation wherein heat and/or pressure are used to fuse the toner image to the copy substrate. During this process, the paper may be exposed to high temperatures of the order of 400°F in a roll fuser, for example, wherein moisture in the paper may be driven from the paper. The dryness of the paper exiting the fusing operation causes severe handling problems in the subsequent manipulation of the individual sheets in subsequent operations such slitting, folding or inserting the sheets into envelopes. For example, with increased dryness, static electricity is more prone to develop resulting in paper jams. In addition, dryness can effect paper stiffness, curl and other paper distortions due to moisture differentials.resulting in productivity losses. These difficulties are particularly acute for duplexed copies which are passed through the fuser twice. These problems can be largely eliminated by rapidly and uniformly restoring the major portion of the paper moisture lost in the fusing operation. This may be accomplished by injecting ambient air having a relative humidity of at least 35% between the sheets in the stack of sheets collected exiting from the fuser. For example, pressurized ambient air may be injected at the bottom of the stack and on one or more sides of the stack thereby fluffing the stack and and exposing both sides of each sheet to the moisture ladened ambient air. This may be accomplished by providing a container suitably sized and shaped to enable ex ansion of the stack from the

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XEROX DISCLOSURE JOURNAL

MOISTURE RESTORATION OF Proposed Classification XEROGRAPHIC COPIES U.S. c1.355/3 Richard G. Weller Int. C1. G03g 15/00

In the conventional xerogra hic process for producing copies or prints on

through the fusing operation wherein heat and/or pressure are used to fuse the toner image to the copy substrate. During this process, the paper may be exposed to high temperatures of the order of 400°F in a roll fuser, for example, wherein moisture in the paper may be driven from the paper. The dryness of the paper exiting the fusing operation causes severe handling problems in the subsequent manipulation of the individual sheets in subsequent operations such slitting, folding or inserting the sheets into envelopes. For example, with increased dryness, static electricity is more prone to develop resulting in paper jams. In addition, dryness can effect paper stiffness, curl and other paper distortions due to moisture differentials.resulting in productivity losses. These difficulties are particularly acute for duplexed copies which are passed through the fuser twice. These problems can be largely eliminated by rapidly and uniformly restoring the major portion of the paper moisture lost in the fusing operation. This may be accomplished by injecting ambient air having a relative humidity of at least 35% between the sheets in the stack of sheets collected exiting from the fuser. For example, pressurized ambient air may be injected at the bottom of the s...