Charge control for fuser roll to prevent print history related marks on copy
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United States of America Patent
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Jun 17, 2008
Grant Date -
Jun 21, 2007
app pub date -
Dec 21, 2005
filing date -
Dec 21, 2005
priority date (Note) -
In Force
status (Latency Note)
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Abstract
The magnitude and polarity of the voltage on the fuser roll surface is controlled by either electronic charge application means or by applying charge control agents to the fuser. For negative toner, the fuser roll voltage must also be negative (and visa versa). This will repel the negative toner at the entrance to the fuser nip, prevent the toner from transferring to the fuser roll at the entrance of the fuser nip and preclude the formation of NVO and consequently prevent MOC.
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