Photoelectrographic method for printing
AssigneeEastman Kodak Company
InventorsLawrence E. Contois, William Mey
Life of this patent
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Abstract
A photoelectrographic element for electrostatic imaging, containing a conductive layer and a photosensitive layer, is produced using photosensitive layer materials which form a barrier to charge injection where exposed to ultraviolet radiation. As a result, exposed areas can be charged, while unexposed portions cannot. The photosensitive layer contains an organic photoconductor, an ultraviolet radiation sensitizer, and, optionally, an organic binder. A method of forming images with this photoelectrographic element is also disclosed.
Claims9
A photoelectrographic method for printing using a photoelectrographic element comprising:
- a conductive layer and
- a photosensitive layer, which is free of photopolymerizable materials and is in electrical contact with said conductive layer, comprising:
- an organic photoconductor and
- an ultraviolet radiation sensitizer, wherein said method comprises:
- exposing said element to ultraviolet radiation without prior charging to create a barrier to charge injection in exposed portions of said photosensitive layer but not in unexposed portions thereof, and
- printing an image from said exposed element, said printing comprising:
- charging said element, whereby exposed portions of said element are charged, while unexposed portions are not charged to form an electrostatic latent image on said element;
- developing the electrostatic latent image by applying charged toner particles to said element to produce a toned image;
- and
- transferring the toned image to a suitable receiver, wherein said printing is carried out one time for each print made.
Dependencies are inferred from the claim text.