Patent ID: 6227110
Filing Date: 2001-05-08
Classification: B41F,B41P

Abstract:
An offset printing press for printing a web, the press comprising:a frame;a first plate cylinder pivotally mounted in the frame;a first blanket cylinder movably mounted in the frame, the first blanket cylinder in selective contact with the first plate cylinder;a second blanket cylinder rotatably mounted and translationally fixed to the frame for forming a nip with the first blanket cylinder, the web being able to pass through the nip; anda second plate cylinder pivotally mounted to the frame for contacting the second blanket cylinder;a first air cylinder connected to the first blanket cylinder and the second plate cylinder;a second air cylinder connected to the first plate cylinder;the press having a first operative condition wherein the first plate cylinder and the first blanket cylinder are in direct contact to permit double-sided printing on the web;a second operative condition wherein the first plate cylinder and the first blanket cylinder are separated to permit a plate change on the first plate cylinder while the web is printed by the second blanket cylinder;third operative condition wherein the second plate cylinder and the second blanket cylinder are separated while the web is printed by the first blanket cylinder anda non-printing condition in which the first blanket cylinder is separated from the second blanket cylinder.