Apparatus for electrostatic imaging
AssigneeHewlett-Packard Development Company, L.P.
InventorsRichard Fotland, Eric Hanson, Napolean Leoni, Paul McClelland
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Abstract
A print head includes a first electrode layer including a plurality of generator electrodes, a second electrode layer including a plurality of discharge electrodes, and an insulating layer disposed between the generator electrodes of the first electrode layer and the discharge electrodes of the second electrode layer. The discharge electrodes include at least one discharge aperture extending therethrough. Each discharge aperture has an undercut region defining a discharge surface spaced from and substantially parallel to an opposed surface of the insulating layer.
Claims22
A print head for use in an electrostatic imaging process, the print head comprising:
- a first electrode layer including a plurality of generator electrodes;
- a second electrode layer including a plurality of discharge electrodes;
- and
- an insulating layer disposed between the generator electrodes of the first electrode layer and the discharge electrodes of the second electrode layer;
- wherein each of the plurality of discharge electrodes includes at least one discharge aperture extending therethrough, the at least one discharge aperture having an undercut region forming an overhanging portion defining a discharge surface spaced from and substantially parallel to an opposed surface of the insulating layer.
An image transfer device comprising:
- an imaging member including an outer imaging surface;
- a charge deposition print head including a generator electrode on a first side of an insulating layer and a discharge electrode on a second side of the insulating layer, wherein the discharge electrode includes at least one discharge aperture extending therethrough, the at least one discharge aperture having an undercut region forming an overhanging portion defining a discharge surface spaced from and substantially parallel to the second side of the insulating layer;
- wherein the print head is configured to direct a stream of charge carriers from the at least one discharge aperture to the imaging surface and thereby form an electrostatic latent image on the imaging surface.
A method of manufacturing a print head for use in an electrostatic image transfer device, comprising:
- providing a first electrode layer including a plurality of generator electrodes on a first surface of an insulating layer;
- providing a second electrode layer including a plurality of discharge electrodes on a second, opposite surface of the insulating layer;
- and
- forming at least one discharge aperture in each of the plurality of discharge electrodes, wherein the at least one discharge aperture includes an undercut region forming an overhanging portion defining a discharge surface spaced from and substantially parallel to the second surface of the insulating layer.
Dependencies are inferred from the claim text.