Printing apparatus and method
AssigneeXerox Corporation
InventorsJoseph M. Wing, Brian R. Conrow, Robert Edward Hildebrand, Brian J. Perry, Alan G. Schlageter, Shawn Updegraff, Moritz P. Wagner, R. Enrique Viturro
Life of this patent
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Abstract
Disclosed is a printing apparatus and method to correct for image non-uniformities. The printing apparatus comprises a photoreceptor (P/R) belt charging device positioned to charge the P/R belt after an image is transferred to a media sheet. Subsequently, an image sensing device scans the P/R belt residual image or patches to detect image non-uniformities.
Claims21
A printing apparatus comprising:
- a P/R (Photoreceptor) belt;
- one or more image recording stations arranged to transfer one or more images to the P/R belt;
- an image transfer station arranged to transfer an image from the P/R belt to a media sheet;
- a P/R belt charging device positioned to charge the P/R belt after an image is transferred to a media sheet;
- and
- an image sensing device to sense images associated with the P/R belt, the image sensing device positioned to scan the P/R belt image after the P/R belt is charged by the P/R belt charging device.
A method of controlling image non-uniformities associated with a printing apparatus P/R belt, the method comprising:
- transferring an image from one or more image recording stations to the P/R belt;
- transferring the image from the P/R belt to a media sheet;
- negatively charging the P/R belt and residual image associated with the P/R belt;
- using a full width array sensor to scan the P/R belt residual image;
- and
- adjusting one or more image recording stations to reduce image non-uniformities associated with the P/R belt.
A xerographic apparatus comprising:
- a P/R belt;
- one or more image recording stations operatively coupled to the P/R belt;
- an image transfer station operatively coupled to the P/R belt and adapted to transfer an image from the P/R belt to a media sheet;
- a P/R belt pre-clean dicorotron adapted to negatively charge the P/R belt after the pre-clean magnet positively charges the P/R belt;
- and
- a full width array sensor operatively coupled to the P/R belt image after the P/R belt is negatively charged by the pre-clean dicorotron.
Dependencies are inferred from the claim text.