Process and apparatus for cleaning the blanket cylinders of a rotary offset printing press

Apparatus for cleaning a rubber blanket and subsequently controlling the concentration of explosive or noxious fumes, said rubber blanket being mounted on a blanket cylinder of a printing unit of a rotary offset printing press comprising a plurality of printing units, a web including at least one printing surface, a web unwinding unit upon which said web is disposed and from which it is delivered in a downstream direction towards and through said printing units, a dryer having a plurality of drying sections and provided with an inlet and an outlet, a press folder, and a plurality of cleaning units with cleaning beams, said beams being arranged axially parallel with said blanket cylinder and carrying a controllable pressure element which permits time- and quantity-controlled supply of a cleaning solution to said blanket cylinder, and an applicator unit for metering and applying controlled quantities of an auxiliary compound to said at least one printing surface of said web, said applicator unit being located in the area between the last printing unit and the first drying section of the dryer.

Apparatus for cleaning a rubber blanket and subsequently controlling the concentration of explosive and noxious fumes, said rubber blanket being mounted on a blanket cylinder of a printing unit of a rotary offset printing press comprising a plurality of printing units, a web including at least one printing surface, a web unwinding unit upon which said web is disposed and from which it is delivered in a downstream direction towards and through said printing units, a dryer having a plurality of drying sections and provided with an inlet and an outlet, a pressure folder, and a plurality of cleaning units with cleaning beams, said beams being arranged axially parallel with said blanket cylinder and carrying a controllable pressure element which permits time- and quantity-controlled supply of a cleaning solution to said blanket cylinder, and an applicator unit for metering and applying controlled quantities of an auxiliary compound to said at least one printing surface of said web, said applicator unit being located in the area between the last printing unit and the first drying section of the dryer at the inlet of said dryer and includes means for imparting a sliding motion to said applicator unit parallel to the direction of travel of the web.

Apparatus for cleaning a rubber blanket subsequently controlling the concentration of explosive or noxious fumes, said rubber blanket being mounted on a blanket cylinder of a printing unit of a rotary offset printing press comprising a plurality of printing units, a web including at least one printing surface, a web unwinding unit upon which said web is disposed and from which it is delivered in a downstream direction towards and through said printing units, a dryer having a plurality of drying sections and provided with an inlet and an outlet, a pressure folder, and a plurality of cleaning units with cleaning beams, said beam being arranged axially parallel with said blanket cylinder and carrying a controllable pressure element which permits time- and quantity-controlled supply of a cleaning solution to said blanket cylinder, and an applicator unit for metering and applying controlled quantities of an auxiliary compound to said at least one printing surface of said web, said applicator unit being located in the area between the last printing unit and the first drying section of the dryer at the inlet of said dryer and includes means for imparting a sliding motion to said applicator unit parallel to the direction of travel of the web, said means for imparting sliding motion to said applicator unit including guide rails and a servo drive.