Pressure-sensitive tacky printing roller for removing printing inks from a printing plate
OwnerFred Dankertinventor
Life of this patent
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Abstract
A printing roller, or form roller, having sufficient pressure-sensitive tack for cleanly removing ink from non-image areas of a waterless planographic plate irrespective of the tackiness of the ink. The roller can be fabricated with the necessary pressure-sensitive tack by disposing a coated sleeve, or coating layer, upon the peripheral surface of a standard roller base. The surface of the coating is elastomeric. Elastomers that will work with this invention can be selected from a group consisting of: butyl rubber, nitrile rubber, styrene butadiene, polychoroprene, polysulfide, polyurethane, polyolefin, polyvinyl acetate, acrylics, gelatine/aldehyde, epoxies, and combinations thereof.
Claims6
A printing roller having a pressure-sensitive tack for cleanly removing inks from non-image areas of a waterless planographic plate, said printing roller comprising a roller base having a pressure-sensitive tack for cleanly removing said ink from said non-image areas of said waterless planographic plate, irrespective of a wide range of tackiness characteristics of inks, a material for said roller base providing a pressure-sensitive tacky surface, and comprising in admixture a liquid butadiene acrylonitrile copolymer and a liquid epoxide terminated polysulfide in an approximate ratio by weight of at least 2:1 butadiene acrylonitrile copolymer to expoxide terminated polysulfide.
Dependencies are inferred from the claim text.