Man Roland Druckmaschinen Ag

Manroland Ag

Wolfgang Zeller

Robert Kersch

Peer Dilling

Andreas Birkenfeld

Andrea Kersch

Ulrike L&uuml;tgens

Ralf Losert

In order to create preconditions, in a web-fed rotary press, for good format variability of the printed products and economic utilization of the printing material, at least two printed pages of different heights are arranged in the circumferential direction on a form cylinder.

Web-fed rotary press

A method of cross-cutting a moving web uses a cutting knife operably mounted on a knife cylinder having a circumferential distance Lwhere Lis smaller than a cut length, L. The knife cylinder for revolving in a first and a second opposite direction is powered by a drive motor in either direction. The method includes revolving the knife cylinder in a first direction, cutting the web with the cutting knife, and completing a first cut. The knife cylinder is then reversed to retard progress in the first direction and then accelerated to the speed of the moving web until starting the second cut.

Method of crosscutting a moving web

An automatically controlled cleaning system has a cleaning fluid reservoir with a feed of the cleaning fluid to the rotating bodies to be cleaned via a cleaning element for each body. Its serviceability can be monitored, in particular erroneously exceeding the critical quantity of cleaning agent per unit time during the cleaning of the rotating bodies of the press can be detected and countermeasures can be initiated, by constructing the cleaning reservoir as a pressure container which can be pressurized from a compressed-air source via an electronically drivable changeover valve V , and by implementing each feed of the cleaning fluid to the rotating body by means of a fluid feed line in which there are installed at least one electronically driveable changeover valve V that controls the flow, and at least one further electronically driveable changeover valve V which controls the expulsion quantities and expulsion times of the cleaning fluid. A pressure sensor arranged between the changeover valves V and V , measures the line pressure and outputs signals to the control means. At least all the electronically drivable changeover valves V , V , V can be switched by the control means on the basis of a determinable operating program and monitored by a monitoring program communicating with the latter and incorporating the signals supplied by the pressure sensor , and at least one shut-down measure can be derived via the control means on the basis of the control result.

Cleaning system for a rotary press and method of controlling the introduction of cleaning fluid

Growing community of inventors

Gersthofen, Germany

Wolfgang Zeller