Patent ID: 7383772

Claim:
A printing press comprising: at least a first printing unit including at least two cylinders defining a printing gap having an inlet area and an outlet area, said at least first printing unit being adapted for imprinter operation wherein in a first operational situation a web is imprinted in said printing gap and in a second operational situation the web is conducted without contact with said at least two cylinders in said printing gap; a first guide element in said inlet area and a second guide element in said outlet area; a wall of said at least second guide element, said wall including an outer surface having a surface area defining said guide element; and a plurality of outward-directed penetrating bores configured as micro-bores in said wall, each of said micro-bores having a diameter no greater than 500 μm, a density of said plurality of outwardly directed penetrating micro-bores per unit of said surface area being at least 0.2/mm 2 , said plurality of outwardly directed penetrating micro-bores being adapted for the exit of a fluid under pressure.