Method for charging a photoreceptor to extend the life of a charge receptor in a xerographic printer
AssigneeXerox Corporation
InventorsJohn Facci, Rachael McGrath
Life of this patent
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Abstract
A method of operating an electrostatographic printing apparatus, the apparatus including a charge-retentive member defining an imaging surface and a charging device for placing a charge on the imaging surface, including the steps of: providing a power supply to apply a bias to the bias charging roll; and applying a bias to the bias charging roll, the applying includes applying a burst modulated waveform to the bias charging roll.
Claims19
A method for charging a photoreceptor to reduce wear on the photoconductor, comprising:
- providing a power supply to apply a bias to said bias charging roll;
- and
- applying a bias to said bias charging roll, said applying includes applying a burst modulated waveform to said bias charging roll, generating a burst frequency for said burst modulated waveform, said generating includes employing a DC offset from an AC waveform, in which said AC waveform of a first frequency is gated on and off at a second frequency.
A method of operating an electrostatographic printing apparatus, the apparatus including a charge-retentive member defining an imaging surface and a charging device for placing a charge on the imaging surface, comprising:
- providing a power supply to apply a bias to said bias charging roll;
- and
- applying a bias to said bias charging roll, said applying includes applying a burst modulated waveform to said bias charging roll, the applying includes generating a burst frequency for said burst modulated waveform, the generating includes employing a DC offset from an AC waveform, in which said AC waveform of a first frequency is gated on and off at a second frequency and fixing a carrier frequency to constant frequency and varying a burst rate.
An electrostatographic printing apparatus including a charge-retentive member defining an imaging surface and a charging device for placing a charge on the imaging surface, comprising:
- a power supply to apply a bias to said bias charging roll;
- and
- means for controlling said power supply to apply a burst modulated waveform to said bias charging roll, said burst modulated waveform, includes a DC offset from an AC waveform, in which said AC waveform of a first frequency is gated on and off at a second frequency and fixing a carrier frequency to constant frequency and varying a burst rate.
Dependencies are inferred from the claim text.