Patent ID: 6371020
Filing Date: 2002-04-16
Classification: B41F

Abstract:
A web-fed rotary printing press comprising:at least one printing group for printing a printed image on a print-carrying web passing through said at least one printing group; at least one transfer roller in said at least one printing group, said transfer roller having a transfer cylinder surface and a transfer cylinder free radius, said transfer cylinder further having a transfer cylinder effective radius defined as a radius of said at least one transfer cylinder during printing of the printed image on the print carrying web as the print carrying web passes through said at least one printing group, said effective radius being less than said free radius; at least one driveable web guide roller located after, in a web running direction said at least one printing group to receive the print carrying web with the printed image from said at least one printing group, said at least one web guide roller having a web guide surface touching a printed side of the print-carrying web and having a web guide roller radius which, during operation of said at least printing group, is equal to said transfer cylinder effective radius; and means for driving said web guide roller and said transfer cylinder in angular synchronicity, the printed image printed on the printed side of the print carrying web by said at least one printing group always contacting the same location on said web guide surface of said at least one web guide roller.