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AssigneePalo Alto Research Center Incorporated
InventorsAnne PLOCHOWIETZ, Robert A. STREET, David K. BIEGELSEN, Gregory B. ANDERSON, Joanne L. LEE, Joerg MARTINI, Kathryn F. MURPHY, Thomas WUNDERER
Estimating the term…
Ink-based digital printing systems useful for ink printing include a secondary roller having a rotatable reimageable surface layer configured to receive fountain solution. The fountain solution layer is patterned on the secondary roller and then partially transferred to an imaging blanket, where the fountain solution image is inked. The resulting ink image may be transferred to a print substrate. To achieve a very high-resolution (e.g., 1200-dpi, over 900-dpi) print with these secondary roller configurations, an equivalent very high-resolution fountain solution image needs to be transferred from the secondary roller onto the imaging blanket. To increase the resolution of the image on the secondary roller, examples include a textured surface layer added to the secondary roller for contact angle pinning the fountain solution on the roll. Approaches to introduce a micro-structure onto the surface layer of the secondary roller, and also superoleophobic surface coatings are described.
A secondary roller useful for printing with an ink-based image forming device having a rotatable reimageable imaging member as the secondary roller and a rotatable inking blanket downstream the secondary roller and in rolling communication therebetween, the rotatable inking blanket configured to accept a patterned fountain solution latent image from the secondary roller and transfer an ink image based on the patterned fountain solution latent image, the secondary roller comprising a textured outer surface layer having a textured surface designed to reduce lateral spreading of fountain solution via fountain solution wetting between pixel areas of the outer surface.
A method for reducing lateral spreading of fountain solution deposited on an outer surface of a secondary roller useful for printing with an ink-based image forming device having a rotatable reimageable imaging member as the secondary roller and a rotatable inking blanket downstream the secondary roller and in rolling communication therebetween, the rotatable inking blanket configured to accept a patterned fountain solution latent image from the secondary roller and transfer an ink image based on the patterned fountain solution latent image, the method comprising modifying the outer surface of the secondary roller into a textured outer surface layer having a textured surface designed for contact pinning of fountain solution between pixel land areas of the outer surface.
A secondary roller useful for printing with an ink-based image forming device having a rotatable reimageable imaging member as the secondary roller and a rotatable inking blanket downstream the secondary roller and in rolling communication therebetween, the rotatable inking blanket configured to accept a patterned fountain solution latent image from the secondary roller and transfer an ink image based on the patterned fountain solution latent image, the secondary roller comprising:
Dependencies are inferred from the claim text.