Patent ID: 6116159
Filing Date: 2000-09-12
Classification: B41F,B65H

Abstract:
A paper wrinkle preventing device in a rotary printing press which has an offset printing portion for printing web paper coming in contact with surfaces of two blankets having side edges adjacent to each other at an approximately axial center of a blanket cylinder, and also has a drag roller for pulling the printed web paper downstream from the offset printing portion, the paper wrinkle preventing device being characterized in that a contact roller is arranged between the offset printing portion and the drag roller such that a circumferential face of the contact roller can rotatably come in contact with the running web paper, and an equal diameter portion is formed by a roller portion coming in contact with a portion of the running web paper coming in contact with an adjacent portion of each of the two blankets and a portion near this adjacent portion, and the contact roller is formed in a taper shape having a diameter reduced as each of both side portions of the equal diameter portion approaches an end portion of the contact roller.