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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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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Inventor Name Address # of filed Patents Total Citations
Berkes, John S Fairport, NY 47 595
Fletcher, Gerald M Pittsford, NY 70 893
Kunzmann, Brendan Rochester, NY 2 0

Cited Art Landscape

Patent Info (Count) # Cites Year
Xerox Corporation (1)
* 4,935,785 Electrophotographic fuser roll and fusing process 26 1988
* Cited By Examiner

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