Corona deterioration and moisture compensation for transfer unit in an electrophotographic apparatus
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United States of America Patent
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Mar 1, 1994
Grant Date -
N/A
app pub date -
Dec 18, 1990
filing date -
Dec 20, 1989
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A transfer apparatus for electrophotography is disclosed in which the resistance values of a transfer belt and the recording paper are measured, and the current value applied to a device for charging a member is set on the basis of the electrical resistance values. The charging device of the transfer belt is adapted to be taken up and reeled out and to circulate along a track. This configuration assures a stable transfer characteristic against the secular environmental variations of the component elements, lengthens the intervals of replacement of the charged member, and hence increases the mechanical life of the transfer apparatus and the electrophotographic apparatus using the same.
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