Patent ID: 6035782
Filing Date: 2000-03-14
Classification: B41F,B41P

Abstract:
In a printing apparatus for selectively printing non-variable information on discrete document portions of a single web during a discrete continuous printing run for said web including an inker roll, a plate cylinder and an impression cylinder mounted for rotation about parallel axes, a method of operating the printing apparatus, comprising the steps of:selectively and periodically displacing the inker roll into contact with the plate cylinder during the continuous discrete printing run for said web in response to computer-generated print commands to transfer ink from the inker roll to the plate cylinder upon initiation of printing revolutions of said inker roll, plate cylinder and impression cylinder to print the non-variable information on selected discrete document portions of the web; andselectively and periodically displacing the inker roll away from and out of contact with the plate cylinder during the continuous discrete printing run for said web upon initiation of non-printing revolutions of the inker roll, plate cylinder and the impression cylinder to prevent transfer of ink from the inker roll to the plate cylinder and onto other discrete document portions of said single web.