Liquid electro-photographic printing
AssigneeHP Indigo B.V.
InventorShmuel I. Borenstain
Life of this patent
Estimating the term…
Abstract
In one example, a printing process includes: forming a first latent image on a photoconductor; applying a first LEP ink to the photoconductor to develop the first latent image into a first ink image; forming a second latent image having a first part on the first ink image and a second part on the photoconductor; and applying a second LEP ink to the first ink image and to the photoconductor to develop the second latent image into a second ink image and form a composite on the photoconductor in which some of the second ink image overlaps some of the first ink image.
Claims20
A printer, comprising:
- a photoconductor;
- a charging device to charge the photoconductor;
- a photoimaging device to form latent images on the photoconductor;
- a controller to operate the photoimaging device to discharge select areas of the photoconductor to form a first latent image;
- a first developer applying a first ink to the photoconductor to develop the first latent image;
- a discharging device to discharge the photoconductor and the developed first image, wherein the charging device to then re-charge the photoconductor and the developed first image prior to the controller operating the photoimaging device to form a second latent image overlapping at least a part of the developed first image on the photoconductor;
- and
- a second developer to develop the second latent image on the photoconductor while the first developed image remains on the photoconductor.
The printer of claim, further comprising four developers, wherein the first developer contains yellow ink and a fourth developer contains black ink.
A method of printing, the method comprising:
- developing a first latent image on a photoconductor;
- charging the developed image and the photoconductor;
- forming a second latent image on the photoconductor without removing the developed image, the second latent image overlapping at least part of the developed image.
A non-transitory memory comprising programming for a processor of a printer, the programming, when executed by the processor, causing
- a charging device to charge a photoconductor;
- a photoimaging device to discharge select areas of the photoconductor to form a first latent image on the photoconductor;
- a first developer to develop the first latent image;
- a discharging device to discharge the photoconductor and the developed image;
- the charging device to charge the photoconductor and the developed image;
- the photoimaging device to discharge select areas of the photoconductor and the developed image to form a second latent image, the second latent image at least partially overlapping the developed image on the photoconductor;
- and
- a second developer to develop the second latent image.
Dependencies are inferred from the claim text.