Electricity: measuring and testing – A material property using electrostatic phenomenon
Patent
1990-12-28
1992-07-21
Moses, R. L.
Electricity: measuring and testing
A material property using electrostatic phenomenon
355203, 430 31, 430 55, 324457, G01N 2760
Patent
active
051326272
ABSTRACT:
A process is disclosed for ascertaining electrical discharge properties of an electrophotographic imaging member including the steps of (a) providing at least one electrophotographic imaging member comprising an electrically conductive layer and at least one photoconductive layer, (b) contacting the surface of the electrophotographic imaging member with a substantially transparent electrode and applying an electric potential or an electric current to form an electric field across the photoconductive layer, (c) terminating the applying of the electric potential or the electric current, (d) exposing the photoconductive layer to activating radiation to discharge the electrophotographic imaging member, (e) repeating steps (b), (c) and (d), and (f) measuring the potential across the photoconductive layer during steps (b), (c) and (d) as a function of time by means of an electrostatic meter coupled to the electrode. Also, disclosed is apparatus for ascertaining electrical discharge properties of an electrophotographic imaging member including (a) means to support an electrophotographic imaging member comprising an electrically conductive layer and at least one photoconductive layer, (b) means for applying an electric potential or electric current to a substantially transparent electrode on the electrophotographic imaging member to form an electric field across the photoconductive layer, (c) means for terminating the applying of the electric potential or the electric current, (d) an electrostatic voltmeter probe coupled to the means for applying an electric current to the electrode, (e) means for exposing the photoconductive layer through the substantially transparent electrode to activating radiation to discharge the electrophotographic imaging member to a predetermined level, and (f) means for exposing the photoconductive layer to activating radiation to fully discharge the electrophotographic imaging member.
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Domm Edward A.
Mishra Satchidanand
Pai Damodar M.
Popovic Zoran D.
Scharfe Merlin E.
Moses R. L.
Stanzione P.
Xerox Corporation
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