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US 10,705,475 B2Granted
Photo-conductor drum with protective layer of material
AssigneeHewlett-Packard Development Company, L.P.
InventorsDennis Alan Abramsohn, Roberta Gayle Fothergill, Brent L Meyer, Jeff Luke
Life of this patent
Estimating the term…
Abstract
A photo-conductor drum includes: a cylindrical surface to receive a charge pattern corresponding to an image to be printed; and a protective layer of material coating at least a portion of the cylindrical surface to protect the cylindrical surface from damage prior to installation of the drum in a printing device.
Claims18
A photo-conductor drum cartridge comprising:
- a photo-conductor drum having a cylindrical surface to receive a charge pattern corresponding to an image to be printed;
- a cartridge structure in which the photo-conductor drum is incorporated;
- and
- a protective layer of charged toner coating at least an entire printable area of the cylindrical surface to protect the cylindrical surface from damage prior to installation of the drum in a printing device.
1 more element
A photo-conductor drum comprising:
- a cylindrical surface to receive a charge pattern corresponding to an image to be printed;
- a warning image of charged toner formed within a warning image region of the cylindrical surface to discourage contact with the surface;
- and
- a protective layer of charged toner coating at least a portion of the cylindrical surface outside the warning image region to protect the cylindrical surface from damage resulting from contact with the cylindrical surface prior to installation of the drum in a printing device.
1 more element
A method comprising:
- forming a photo-conductor drum with a cylindrical surface to receive a charge pattern corresponding to an image to be printed;
- forming a protective layer of charged toner on at least an entire printable area of the cylindrical surface to protect the surface from damage;
- and
- packaging the photo-conductor drum with the protective layer for distribution to an end-user.
1 more element
A method comprising:
- forming a photo-conductor drum with a cylindrical surface to receive a charge pattern corresponding to a warning image to be printed;
- forming a protective layer comprising toner on the cylindrical surface to protect the surface from damage by
- forming first a coating layer of toner on the cylindrical surface;
- and
- forming second an image layer on the coating layer, the image layer comprising the warning;
- and
- packaging the photo-conductor drum with the protective layer for distribution to an end-user.
4 more elements
A method comprising:
- forming a uniform charge pattern on a cylindrical surface of a photo-conductor drum;
- selectively dissipating the charge pattern in an image region of the cylindrical surface that corresponds to a warning image;
- applying charged toner to the cylindrical surface to form the warning image in the image region and a protective layer in another region of the cylindrical surface to protect the surface from damage;
- and
- packaging the photo-conductor drum with the protective layer and the warning image for distribution to an end-user.
2 more elements
Dependencies are inferred from the claim text.