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PAPER TRAY HEATER

IP.com Disclosure Number: IPCOM000022913D
Original Publication Date: 1976-Apr-30
Included in the Prior Art Database: 2004-Mar-27
Document File: 2 page(s) / 253K

Publishing Venue

Xerox Disclosure Journal

Abstract

In' electrophotographic printing machine, a sheet of paper has a toner powder image transferred thereto. The sheet of paper advances along a sheet path. Frequently, if the humidity conditions are excessive, the moisture results in paper curling. Paper curling produces sheet jams in the printing machine. This problem may be reduced by controlling the humidity or moisture content of the sheet, The moisture content of the copy paper is controlled by heating apparatus 10, Heating apparatus 10 includes a power supply 12 electrically connected to blower 14, Power supply 12 also energizes a 100 watt resistor 16 disposed in manifold 18 connected to blower 14, Manifold 18 is connected to mani-~ fold 20 which has slots 22 extending substantially parallel to the longitudinal axis thereof, In this way, the air flow from blower 14 passes over resistor 16 and is heated, The

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XEROX DISCLOSURE JOURNAL

PAPER TRAY HEATER Proposed Classification

G. Schwarz U.S. Cl, 206/57

mt. ci. 365h 55/00

In' electrophotographic printing machine, a sheet of paper
has a toner powder image transferred thereto. The sheet of
paper advances along a sheet path. Frequently, if the
humidity conditions are excessive, the moisture results in
paper curling. Paper curling produces sheet jams in the
printing machine. This problem may be reduced by controlling
the humidity or moisture content of the sheet, The moisture
content of the copy paper is controlled by heating apparatus
10, Heating apparatus 10 includes a power supply 12
electrically connected to blower 14, Power supply 12 also
energizes a 100 watt resistor 16 disposed in manifold 18
connected to blower 14, Manifold 18 is connected to mani-~
fold 20 which has slots 22 extending substantially parallel
to the longitudinal axis thereof, In this way, the air flow
from blower 14 passes over resistor 16 and is heated, The

heated air enters manifold 20 and passes through slots 22
onto the stack of copy paper in the tray of the electro~
photographic printing machine, This reduces the moisture
content of the sheets contained therein, The system is
regulated as a function of the humidity contained within
the air in the region of the copy paper. Humidistat 24,
connected in series with the power supply 12 and blower 14,
opens and blower 14 is de-energized if the detected humidity
is above the pre-determined level, Contrawise, if the

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