US Patent No: 7,389,077
Number of patents in Portfolio can not be more than 2000
Charge control for fuser roll to prevent print history related marks on copy
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Jun 17, 2008
Issued date -
Dec 21, 2005
filing date -
11/314,573
serial no -
In Force
status
Importance
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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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First Claim
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International Classification(s)
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Cited Art
| Patent Info | (Count) | # Cites | Year |
|---|---|---|---|
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| 4,935,785 Electrophotographic fuser roll and fusing process | 26 | 1988 | |
Patent Citation Ranking
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 7.5 Year Payment | $3600.00 | $1800.00 | $900.00 | Dec 17, 2015 |
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