Patent ID: 6986305

Claim:
A web-fed rotary offset printing machine comprising a pair of side walls, a pair of opposed transfer cylinders mounted in said side walls, between which cylinders a web of printing material can be guided, said cylinders being moveable apart while the machine is running so that a printing plate or a printing sleeve can be changed, web guiding elements for guiding said web one of toward and away from said transfer cylinders, said web guiding elements comprising a plurality of supporting elements arranged transversely to the web on each side of the web, the supporting elements being displaceable transversely with respect to the web for supporting said web during changing of a printing plate or a printing sleeve while the web is moving, each said supporting element supporting said web substantially at a point, whereby said supporting elements can act only on narrow print-free areas which are parallel to the direction of travel of the web, and an axle on each side of said web, said supporting elements comprising disc-like elements fitted to said axles, said disc-like elements contacting said web when supporting said web.