Patent ID: 6436191
Filing Date: 2002-08-20
Classification: B65H,Y10S

Abstract:
An apparatus for conveying a web in coating process, comprising:at least one corona discharge treatment roller having a finished surface comprising a material selected from the group consisting of ceramic, elastomer, and an epoxy quartz, said finished surface having a laser engraved, shallow, non-periodic patterned surface for supporting the web, said laser engraved, shallow, non-periodic patterned surface comprising generally down features formed therein, many of the down features overlapping to form interconnected channels comprising between about 50% to about 80% of the surface area of the roller, the depth of the down features being substantially uniform and greater than about 12 microns but less than about 125 microns, and a plurality of spatially separated randomly shaped plateaus between the channels comprising between at least 20% to about 50% of the surface of the roller, and wherein spacing between nearest adjacent plateaus have a uniform width in said surface; and, a frame for rotatably supporting said at least one corona discharge treatment roller, said frame being arranged for conveying said web supported on said surface of said roller to a coating process.