Granted Patent B1

US 8,335,450 · App. 13/160,845 · Granted Dec 18, 2012

Abstract

Claims (34)

1. A method for removing moisture from a photoreceptor in a xerographic device, comprising:

providing a drum with a photoreceptor surface thereon;

providing a heaterless solid state charging device for charging said photoreceptor surface;

providing a single power supply for supplying power to said solid state charging device; and

simultaneously charging and heating said photoreceptor surface with said heaterless solid state charging device to remove moisture from said photoreceptor surface and thereby eliminate image blur.

2. The method of claim 1 , including positioning said solid state charging device to achieve uniform charging and uniform heating of the photoreceptor.

3. The method of claim 1 , including positioning said solid state charging device about 1.5 mm away from said photoreceptor surface.

4. The method of claim 1 , including positioning said solid state charging device at least 1.5 mm away from said photoreceptor surface.

5. The method of claim 1 , wherein said solid state charging device is non-contacting with respect to said photoreceptor surface.

6. The method of claim 5 , including positioning a thermistor to measure the temperature of air between said solid state charging device and said photoreceptor surface.

7. The method of claim 6 , wherein said dual functioning solid state charging device is non-contacting with respect to said surface portion of said photoreceptor substrate.

8. The method of claim 1 , including heating said photoreceptor surface from outside said drum.

9. The method of claim 1 , including providing an AC voltage to said solid state charging device and controlling heating of said solid state charging device by ON/OFF gating of the magnitude of said AC voltage to mitigate high humidity image quality defects.

10. A method for externally heating a surface of a photoreceptor, comprising:

providing a drum;

providing a photoreceptor substrate on said drum, said photoreceptor substrate including a surface portion;

providing a dual functioning solid state charging device, said solid state charging device including a ceramic substrate that supports a dielectric layer positioned between two conductive layers; and

energizing solely said two conductive layers to charge said surface portion of said photoreceptor substrate and simultaneously raise the temperature of said surface portion of said photoreceptor substrate to remove moisture therefrom to eliminate image blur on said surface portion of said photoreceptor substrate in high humidity environments.

11. The method of claim 10 , including providing uniform charging and uniform heating of said surface portion of said photoreceptor substrate.

12. The method of claim 10 , including installing said drum and said solid state charging device into a xerographic apparatus.

13. The method of claim 10 , including positioning said dual functioning solid state charging device at least 1.5 mm away from said surface portion of said photoreceptor substrate.

14. The method of claim 10 , including positioning said dual functioning solid state charging device about 1.5 mm away from said surface portion of said photoreceptor substrate.

15. A method for preventing blurring of images on sheets, comprising:

providing an imaging apparatus for processing and recording images onto said sheets;

providing an image development apparatus for developing said images;

providing a transfer device for transferring said images onto said sheets;

providing a fuser for fusing said images onto said sheets;

providing said imaging apparatus with a drum photoreceptor and a dual use grid less scorotron charging device, said dual use grid less scorotron charging device comprising a ceramic substrate which supports a dielectric layer positioned between two conductive layers, and

using solely corona produced from energizing of said two conductive layers to both charge a surface of said drum photoreceptor and simultaneously heat said surface of said drum photoreceptor to eliminate image blur on said drum photoreceptor surface in high humidity environments.

16. The method of claim 15 , including incorporating said dual use grid less scorotron charging device into a xerographic device.

17. The method of claim 15 , including positioning said dual use grid less scorotron charging device at least 1.5 mm away from said surface of said drum photoreceptor.

18. The method of claim 15 , including positioning said dual use grid less scorotron charging device about 1.5 mm away from said surface of said drum photoreceptor.

19. The method of claim 15 , wherein said dual use grid less scorotron charging device is non-contacting with respect to said surface of said drum photoreceptor.

20. The method of claim 15 , including positioning said dual use grid less scorotron charging device to achieve uniform charging and uniform heating of said drum photoreceptor.

Assignments (8)