Browse Prior Art Database

PAPER PREDRYING IN AN INK JET PRINTER

IP.com Disclosure Number: IPCOM000027280D
Original Publication Date: 1996-Feb-29
Included in the Prior Art Database: 2004-Apr-07
Document File: 2 page(s) / 85K

Publishing Venue

Xerox Disclosure Journal

Abstract

Proposed is a method for predrying wet sheets of paper having a moisture content exceeding 6.5 percent before feeding them to an electrostatic drum for ink jet imaging. The relative humidity of an environment is directly related to the equilibrium content (EMC) of paper. For example, at 40% relative humidity (RH), a wet sheet of paper being dried will reach 6% EMC and a sheet of paper absorbing moisture in a humid environment will reach 5% EMC. This fact may be applied to predrying wet sheets of paper to a level where the moisture content drops below 6.5%.

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Page 1 of 2

XEROX DISCLOSURE JOURNAL

PAPER PREDRYING IN AN INK JET PRINTER
Lawrence K. Agbezuge

Proposed Classification
U.S. C1.346/14013 Int. C1. Gold 15/18

22

14

4 24 n

XEROX DISCLOSURE JOURNAL - Vol. 21, No. 1 JanuaqdFebruary 1996 31

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

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PAPER PREDRYING IN AN INK JET PRINTER (Cont'd)

Proposed is a method for predrying wet sheets of paper having a moisture content exceeding 6.5 percent before feeding them to an electrostatic drum for ink jet imaging.

The relative humidity of an environment is directly related to the equilibrium content (EMC) of paper. For example, at 40% relative humidity (RH), a wet sheet of paper being dried will reach 6% EMC and a sheet of paper absorbing moisture in a humid environment will reach 5% EMC. This fact may be applied to predrying wet sheets of paper to a level where the moisture content drops below 6.5%.

Referring to the accompanying figure, a sheet of paper is fed by a pair transport rollers 24 from the top of paper stack 16. The sheet is fed in the direction of arrow 14 to an electrostatic drum (not shown). Sensor 22 measures the moisture content of the sheet by relating relative humidity, in the vicinity of rollers 24, to the EMC of the sheet. If the sheet EMC exceeds 6.5%, the sheet is conveyed back to stack 16. Parabolic lamps 26 are then activated for a predetermined period of time to pre-dry the sheet. Rollers 24 are also heated to ensure that only dry sheets reach the e...